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Mazza A, Bendini MG, Leggio M, Imberti JF, Valsecchi S, Boriani G. Clinical significance and prognostic value of right bundle branch block in permanent pacemaker patients. J Cardiovasc Med (Hagerstown) 2024; 25:551-558. [PMID: 38809231 DOI: 10.2459/jcm.0000000000001641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
AIMS In patients undergoing pacemaker implantation with no prior history of heart failure (HF), the presence of left bundle branch block (LBBB) has been identified as an independent predictor of HF-related death or hospitalization, while the prognostic significance of right bundle branch block (RBBB) remains uncertain. We aimed to assess the long-term risk of all-cause mortality in patients with a standard indication for permanent pacing and normal or moderately depressed left ventricular function when RBBB is detected at the time of implantation. METHODS We retrospectively enrolled 1348 consecutive patients who had undergone single- or dual-chamber pacemaker implantation at the study center, from January 1990 to December 2022. Patients with a left ventricular ejection fraction ≤35% or a prior diagnosis of HF were excluded. RESULTS The baseline 12-lead electrocardiogram revealed an RBBB in 241 (18%) and an LBBB in 98 (7%) patients. During a median follow-up of 65 [25th-75th percentile: 32-117] months, 704 (52%) patients died. The combined endpoint of cardiovascular death or HF hospitalization was reached by 173 (13%) patients. On multivariate analysis, RBBB was confirmed as an independent predictor of death [hazard ratio, 1.33; 95% confidence interval (CI), 1.09-1.63; P = 0.005]. However, when considering the combined endpoint of cardiovascular death and HF hospitalization, this endpoint was independently associated with LBBB (hazard ratio, 2.13; 95% CI, 1.38-3.29; P < 0.001), but not with RBBB. CONCLUSION In patients with standard pacemaker indications and normal or moderately depressed left ventricular function, the presence of basal RBBB was an independent predictor of mortality. However, it was not associated with the combined endpoint of cardiovascular death and HF hospitalization.
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Affiliation(s)
- Andrea Mazza
- Cardiology Division, S. Maria della Stella Hospital, Orvieto
| | | | - Massimo Leggio
- Clinica Salus Infirmorum, S. Filippo Neri Hospital, Rome
| | - Jacopo F Imberti
- Cardiology Division, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico di Modena, Modena
- Clinical and Experimental Medicine PhD Program, University of Modena and Reggio Emilia
| | | | - Giuseppe Boriani
- Cardiology Division, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico di Modena, Modena
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Yang X, Chen S, Song H, Shu R, Wang J, Wang G, Liu P, Li M, Wu L, Li N, Cui L, Wu S. Association between cardiac conduction block and cardiovascular disease and all-cause mortality: The kailuan study. Int J Cardiol 2024; 399:131666. [PMID: 38141733 DOI: 10.1016/j.ijcard.2023.131666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 12/13/2023] [Accepted: 12/18/2023] [Indexed: 12/25/2023]
Abstract
BACKGROUND Although bundle branch block and atrioventricular block are recognized to be association with cardiovascular disease (CVD) and mortality, the relationship between cardiac conduction block (CCB) and both CVD and all-cause mortality has yet to be explored. AIMS To explore the relationship between CCB and CVD and all-cause mortality. METHODS AND RESULTS We included 145,805 subjects (mean age 49.7 years, 81.2% males) from the kailuan study. CCB was diagnosed through a 12‑lead electrocardiograph (ECG). Mortality and CVD events were ascertained through multiple sources, including a municipal social insurance institution, hospital records, death certificates, and regular active follow-ups. After a mean follow-up of 12.5 years, 18,301 cases developed all-cause mortality. After excluding 4443 subjects with CVD presence at baseline, 13,208 cases of CVD occurred among the 141,362 study subjects during follow-up. Compared with non-CCB group, the cumulative incidence of CVD and all-cause mortality for CCB group was 18.38% VS 12.14% and 33.45% VS 14.18%, respectively. The multivariable-adjusted hazard ratios (HRs) with 95% confidence intervals (CIs) with CCB group were 1.25(1.17-1.34) for CVD, and 1.31(1.25-1.38) for all-cause mortality. Additionally, there were generally stronger associations for CCB with all-cause mortality and CVD in younger participants compared with their older counterparts (Ps-interaction <0.001). CONCLUSION CCB can increase the risk of CVD and all-cause mortality in the general population. Our findings highlight the importance of strategies for preventing CCB to reduce the risk of CVD and mortality.
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Affiliation(s)
- Xuemei Yang
- Department of Rheumatic Disease, Kailuan General Hospital, Tangshan, Hebei, China; Graduate school, North China University of Science and Technology, Tangshan, Hebei, China
| | - Shuohua Chen
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China
| | - Haicheng Song
- Department of Rheumatic Disease, Kailuan General Hospital, Tangshan, Hebei, China
| | - Rong Shu
- Department of Rheumatic Disease, Kailuan General Hospital, Tangshan, Hebei, China
| | - Jierui Wang
- Department of Rheumatic Disease, Kailuan General Hospital, Tangshan, Hebei, China
| | - Guodong Wang
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China
| | - Peipei Liu
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, China
| | - Man Li
- Graduate school, North China University of Science and Technology, Tangshan, Hebei, China
| | - Lili Wu
- Department of Cardiology, Shanghai Songjiang District Central Hospital, Shanghai, China
| | - Na Li
- Department of Rheumatic Disease, Kailuan General Hospital, Tangshan, Hebei, China
| | - Liufu Cui
- Department of Rheumatic Disease, Kailuan General Hospital, Tangshan, Hebei, China.
| | - Shouling Wu
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China.
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Shojaeefard E, Dehghani P, Akbari-Khezrabadi A, Naseri A, Salimi M, Hosseinpour M, Sarejloo S, Abdipour Mehrian SR, Karimi M, Bazrafshan Drissi H. Terminal T-wave concordance is associated with SYNTAX score among left bundle branch block patients suspected of acute coronary syndrome without modified Sgarbossa criteria. J Electrocardiol 2023; 80:178-182. [PMID: 37714665 DOI: 10.1016/j.jelectrocard.2022.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/26/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Timely and precise diagnosis of ischemic cardiac events based on electrocardiogram is challengeable among patients with Left Bundle Branch Block (LBBB). The present study aimed to assess the correlation between SYNTAX score and terminal T-wave morphologies among LBBB patients suspected of Acute Coronary Syndrome (ACS) without modified Sgarbossa criteria. METHOD This cross-sectional study was conducted on the LBBB patients suspected of ACS without modified Sgarbossa criteria. Binary logistic regression was used to assess the correlation of ischemic heart disease (IHD, SYNTAX score > 0) and SYNTAX score categories with terminal T-wave morphologies including T-wave direction in lead V6 and terminal T-wave concordance in leads I, V5, and V6. RESULT This study was done on 93 patients with the mean age of 62.4 ± 9.6 years. More than half of the patients were female (58.1%, 95% CI: 47.4% to 68.2%). Among the participants with IHD, the SYNTAX score categories were correlated to discordant terminal T-wave in leads I, V5, and V6 (OR = 5.71, 95% CI: 1.04 to 31.28, p = 0.04). CONCLUSION Among the LBBB patients with acute ischemic cardiac events without modified Sgarbossa criteria, those with discordant terminal T-waves in leads I, V5, or V6 had higher SYNTAX scores and might require more invasive coronary revascularization techniques such as Coronary Artery Bypass Graft (CABG) surgery.
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Affiliation(s)
- Ehsan Shojaeefard
- Medical Doctor - Master of Public Health (MPH), School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Pooyan Dehghani
- Interventional Cardiologist, Shiraz Research Center, Shiraz, Iran
| | - Ali Akbari-Khezrabadi
- Medical Doctor, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Arzhang Naseri
- Medical Doctor, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Salimi
- Medical Doctor, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Morteza Hosseinpour
- Medical Doctor, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Shirin Sarejloo
- Cardiologist, Cardiovascular Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyed Reza Abdipour Mehrian
- Medical Doctor - Master of Public Health (MPH), School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohammadreza Karimi
- Medical Doctor, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hamed Bazrafshan Drissi
- Cardiologist, Cardiovascular Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; Assistant Professor of Cardiology, Cardiovascular Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
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4
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Holm JT, Stampe NK, Bhardwaj P, Jabbari R, Gustafsson F, Risum N, Tfelt-Hansen J, Winkel BG. Bundle branch block in cardiac arrest survivors without ischemic heart disease. IJC HEART & VASCULATURE 2023; 45:101188. [PMID: 36896255 PMCID: PMC9989659 DOI: 10.1016/j.ijcha.2023.101188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 02/19/2023] [Indexed: 03/05/2023]
Abstract
Aims Cardiac arrest (CA) survivors with left/right bundle branch block (LBBB/RBBB) and no ischemic heart disease (IHD) have not been previously characterized. The aim of this study was to describe heart failure, implantable cardioverter defibrillator (ICD) therapy and mortality in this population. Methods Between 2009 and 2019 we consecutively identified all CA survivors with a consistent bundle branch block (BBB) defined as a QRS ≥ 120 ms, who had a secondary prophylactic ICD implanted. Patients with congenital and ischemic heart disease (IHD) were excluded. Results Among 701 CA-survivors who survived to discharge and received an ICD, a total of 58 (8%) were free from IHD and had BBB; 46 (79%) had LBBB, 10 (17%) had RBBB and 2 (3%) had non-specific BBB (NSBBB). The prevalence of LBBB was 7%. Pre-arrest ECG were available in 34 (59%) patients; 20 patients (59%) had LBBB, 6 (18%) had RBBB, 2 (6%) had NSBBB, 1 had (3%) incomplete LBBB, and 4 (12%) without BBB. At discharge, patients with LBBB had a significantly lower left ventricular ejection fraction (LVEF) than patients with other types of BBB, p < 0.001. During follow-up, 7 (12%) died after a median of 3.6 years (IQR: 2.6-5.1) with no difference between BBB subtypes. Conclusion We identified 58 CA-survivors with BBB and no IHD. The prevalence of LBBB among all CA-survivors was high, 7%. During CA hospitalization LBBB patients presented with a significantly lower LVEF than patients with other types of BBB (P < 0.001). ICD treatment and mortality did not differ between BBB subtypes during follow-up.
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Affiliation(s)
- Julie Terp Holm
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Niels Kjær Stampe
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Priya Bhardwaj
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark.,Section of Forensic Genetics, Department of Forensic Medicine, Copenhagen University, Frederik V's Vej 11, 2100 Copenhagen, Denmark
| | - Reza Jabbari
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Finn Gustafsson
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark.,Department of Clinical Medicine, Copenhagen University, Blegdamsvej 3, 2100 Copenhagen, Denmark
| | - Niels Risum
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Jacob Tfelt-Hansen
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark.,Section of Forensic Genetics, Department of Forensic Medicine, Copenhagen University, Frederik V's Vej 11, 2100 Copenhagen, Denmark
| | - Bo Gregers Winkel
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
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Frimodt-Møller EK, Soliman EZ, Kizer JR, Vittinghoff E, Psaty BM, Biering-Sørensen T, Gottdiener JS, Marcus GM. Lifestyle habits associated with cardiac conduction disease. Eur Heart J 2023; 44:1058-1066. [PMID: 36660815 PMCID: PMC10226753 DOI: 10.1093/eurheartj/ehac799] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 11/25/2022] [Accepted: 12/19/2022] [Indexed: 01/21/2023] Open
Abstract
AIMS Cardiac conduction disease can lead to syncope, heart failure, and death. The only available therapy is pacemaker implantation, with no established prevention strategies. Research to identify modifiable risk factors has been scant. METHODS AND RESULTS Data from the Cardiovascular Health Study, a population-based cohort study of adults ≥ 65 years with annual 12-lead electrocardiograms obtained over 10 years, were utilized to examine relationships between baseline characteristics, including lifestyle habits, and conduction disease. Of 5050 participants (mean age 73 ± 6 years; 52% women), prevalent conduction disease included 257 with first-degree atrioventricular block, 99 with left anterior fascicular block, 9 with left posterior fascicular block, 193 with right bundle branch block (BBB), 76 with left BBB, and 102 with intraventricular block at baseline. After multivariable adjustment, older age, male sex, a larger body mass index, hypertension, and coronary heart disease were associated with a higher prevalence of conduction disease, whereas White race and more physical activity were associated with a lower prevalence. Over a median follow-up on 7 (interquartile range 1-9) years, 1036 developed incident conduction disease. Older age, male sex, a larger BMI, and diabetes were each associated with incident conduction disease. Of lifestyle habits, more physical activity (hazard ratio 0.91, 95% confidence interval 0.84-0.98, P = 0.017) was associated with a reduced risk, while smoking and alcohol did not exhibit a significant association. CONCLUSION While some difficult to control comorbidities were associated with conduction disease as expected, a readily modifiable lifestyle factor, physical activity, was associated with a lower risk.
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Affiliation(s)
- Emilie K Frimodt-Møller
- Division of Cardiology, University of California San Francisco, 505 Parnassus Ave, M1180B, San Francisco, CA 94143, USA
- Department of Cardiology, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Elsayed Z Soliman
- Department of Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Jorge R Kizer
- Division of Cardiology, University of California San Francisco, 505 Parnassus Ave, M1180B, San Francisco, CA 94143, USA
| | - Eric Vittinghoff
- Division of Cardiology, University of California San Francisco, 505 Parnassus Ave, M1180B, San Francisco, CA 94143, USA
| | - Bruce M Psaty
- Cardiovascular Health Research Unit, Departments of Medicine, Epidemiology, and Health Systems and Population Health, University of Washington, Washington, WA 98195-9458, USA
| | - Tor Biering-Sørensen
- Department of Cardiology, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - John S Gottdiener
- Division of Cardiology, University of Maryland, Baltimore, MD 21201, USA
| | - Gregory M Marcus
- Division of Cardiology, University of California San Francisco, 505 Parnassus Ave, M1180B, San Francisco, CA 94143, USA
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6
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Noubiap JJ, Middeldorp ME. Prevention of cardiac conduction disease: a long way to go. Eur Heart J 2023; 44:1067-1069. [PMID: 36632727 DOI: 10.1093/eurheartj/ehac752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- Jean Jacques Noubiap
- Centre for Heart Rhythm Disorders, University of Adelaide, Adelaide, SA 5000, Australia
| | - Melissa E Middeldorp
- Centre for Heart Rhythm Disorders, University of Adelaide, Adelaide, SA 5000, Australia
- Smidt Heart Institute, Cedar-Sinai Medical Centre, Los Angeles, CA, USA
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7
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Kim HM, Hwang I, Yoon YE, Park J, Lee S, Kim H, Kim Y, Lim Y, Cho G. Prediction of Deterioration of Left Ventricular Function Using 3-Dimensional Speckle-Tracking Echocardiography in Patients With Left Bundle-Branch Block. J Am Heart Assoc 2022; 12:e026194. [PMID: 36583438 PMCID: PMC9973573 DOI: 10.1161/jaha.122.026194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Background Previous studies have demonstrated that 2-dimensional (2D) global longitudinal strain (GLS) is associated with cardiovascular outcomes in patients with left bundle-branch block. However, the predictive value of 3-dimensional (3D) speckle-tracking echocardiography has not yet been investigated in these patients. Methods and Results The authors retrospectively identified 290 patients with left bundle-branch block who underwent echocardiography more than twice. Using speckle-tracking echocardiography, 2D-GLS, 3D-GLS, 3D-global circumferential strain, 3D global radial strain, and 3D global area strain were acquired. The association between 2D and 3D strains and the follow-up left ventricular (LV) ejection fraction (LVEF) was analyzed. The study population was divided into 2 sets: a group with preserved LVEF (baseline LVEF ≥40%) and a group with reduced LVEF (baseline LVEF <40%). After a median follow-up of 29.1 months (interquartile range, 13.1-53.0 months), 14.9% of patients progressed to LV dysfunction in the group with preserved LVEF, and 51.0% of patients showed improved LV function in the group with reduced LVEF. Multivariable analysis of 2D and 3D strains revealed that higher 2D-GLS (odds ratio [OR], 0.65 [95% CI, 0.54-0.78], P<0.001) was highly associated with maintaining LVEF in patients with preserved LVEF. However, a lower 3D-global circumferential strain (OR, 0.61 [95% CI, 0.47-0.78], P<0.001) showed a strong association with persistently reduced LVEF in patients with reduced LVEF. Conclusions Although 2D-GLS showed a powerful predictive value for the deterioration of LV function in the preserved LVEF group, 3D strain, especially 3D-global circumferential strain, can be helpful to predict consistent LV dysfunction in patients with left bundle-branch block who have reduced LVEF.
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Affiliation(s)
- Hyue Mee Kim
- Division of CardiologyDepartment of Internal MedicineChung‐Ang University HospitalChung‐Ang University College of MedicineSeoulSouth Korea
| | - In‐Chang Hwang
- Cardiovascular Center & Department of Internal MedicineCollege of MedicineSeoul National UniversitySeoul National University Bundang HospitalSeongnamGyeonggiSouth Korea
| | - Yeonyee Elizabeth Yoon
- Cardiovascular Center & Department of Internal MedicineCollege of MedicineSeoul National UniversitySeoul National University Bundang HospitalSeongnamGyeonggiSouth Korea
| | - Jun‐Bean Park
- Cardiovascular Center, Department of Internal MedicineCollege of Medicine, Seoul National UniversitySeoul National University HospitalSeoulSouth Korea
| | - Seung‐Pyo Lee
- Cardiovascular Center, Department of Internal MedicineCollege of Medicine, Seoul National UniversitySeoul National University HospitalSeoulSouth Korea
| | - Hyung‐Kwan Kim
- Cardiovascular Center, Department of Internal MedicineCollege of Medicine, Seoul National UniversitySeoul National University HospitalSeoulSouth Korea
| | - Yong‐Jin Kim
- Cardiovascular Center, Department of Internal MedicineCollege of Medicine, Seoul National UniversitySeoul National University HospitalSeoulSouth Korea
| | - Yaeji Lim
- Department of Applied StatisticsChung‐Ang UniversitySeoulSouth Korea
| | - Goo‐Yeong Cho
- Cardiovascular Center & Department of Internal MedicineCollege of MedicineSeoul National UniversitySeoul National University Bundang HospitalSeongnamGyeonggiSouth Korea
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Cho Y, Hsu A. ECG of the Month. J Am Vet Med Assoc 2022; 260:1-3. [PMID: 35544421 DOI: 10.2460/javma.21.01.0020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Porcari A, Rossi M, Cappelli F, Canepa M, Musumeci B, Cipriani A, Tini G, Barbati G, Varrà GG, Morelli C, Fumagalli C, Zampieri M, Argirò A, Vianello PF, Sessarego E, Russo D, Sinigiani G, De Michieli L, Di Bella G, Autore C, Perfetto F, Rapezzi C, Sinagra G, Merlo M. Incidence and Risk Factors for Pacemaker Implantation in Light Chain and Transthyretin Cardiac Amyloidosis. Eur J Heart Fail 2022; 24:1227-1236. [PMID: 35509181 DOI: 10.1002/ejhf.2533] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 05/01/2022] [Accepted: 05/02/2022] [Indexed: 11/12/2022] Open
Abstract
AIMS The incidence and risk factors of pacemaker (PM) implantation in patients with cardiac amyloidosis (CA) are largely unexplored. We sought to characterise the trends in the incidence of permanent PM and to identify baseline predictors of future PM implantation in light chain (AL) and transthyretin (ATTR) CA. METHODS AND RESULTS Consecutive patients with AL and ATTR-CA diagnosed at participating Centres (2017-2020) were included. Clinical data recorded within ±1 month from diagnosis were collected from electronic medical records. The primary study outcome was the need for clinically-indicated PM implantation. Patients with PM (n = 41) and/or permanent defibrillator in situ (n = 13) at CA diagnosis were excluded. The study population consisted of 405 patients: 29.4% AL, 14.6% variant ATTR and 56% wild-type ATTR; 82.5% were males, median age 76 years. During a median follow-up of 33 months (interquartile range 21-46), 36 (8.9%) patients experienced the primary outcome: 10 AL-CA, 2 variant ATTR-CA and 24 wild-type ATTR-CA (p = 0.08 at time-to-event analysis). At multivariable analysis, history of atrial fibrillation (hazard ratio [HR] 3.80, p = 0.002), PR interval (HR 1.013, p = 0.002) and QRS >120 ms (HR 4.7, p = 0.001) on baseline ECG were independently associated with PM implantation. The absence of these 3 factors had a negative predictive value of 92% with an area under the curve of 91.8% at 6 months. CONCLUSION In a large cohort of AL and ATTR-CA patients, 8.9% implanted a PM in the 3 years following diagnosis. History of atrial fibrillation, PR >200 ms and QRS >120 ms predicted future PM implantation.
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Affiliation(s)
- Aldostefano Porcari
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Italy
| | - Maddalena Rossi
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Italy
| | - Francesco Cappelli
- Tuscan Regional Amyloidosis Centre, Careggi University Hospital, Florence, Italy.,Cardiomyopathy Unit, Careggi University Hospital, University of Florence, Florence, Italy
| | - Marco Canepa
- Cardiovascular Unit, Department of Internal Medicine, University of Genova, Ospedale Policlinico San Martino IRCCS, Genova, Italy
| | - Beatrice Musumeci
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Psychology, Sapienza University, Rome, Italy
| | - Alberto Cipriani
- Department of Cardiac, Thoracic and Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Giacomo Tini
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Psychology, Sapienza University, Rome, Italy
| | - Giulia Barbati
- Department of Medical Sciences, Biostatistics Unit, University of Trieste, Trieste, Italy
| | - Guerino Giuseppe Varrà
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Italy
| | - Cristina Morelli
- Cardiomyopathy Unit, Careggi University Hospital, University of Florence, Florence, Italy
| | - Carlo Fumagalli
- Cardiomyopathy Unit, Careggi University Hospital, University of Florence, Florence, Italy
| | - Mattia Zampieri
- Cardiomyopathy Unit, Careggi University Hospital, University of Florence, Florence, Italy
| | - Alessia Argirò
- Cardiomyopathy Unit, Careggi University Hospital, University of Florence, Florence, Italy
| | - Pier Filippo Vianello
- Cardiovascular Unit, Department of Internal Medicine, University of Genova, Ospedale Policlinico San Martino IRCCS, Genova, Italy
| | - Eugenio Sessarego
- Cardiovascular Unit, Department of Internal Medicine, University of Genova, Ospedale Policlinico San Martino IRCCS, Genova, Italy
| | - Domitilla Russo
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Psychology, Sapienza University, Rome, Italy
| | - Giulio Sinigiani
- Department of Cardiac, Thoracic and Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Laura De Michieli
- Department of Cardiac, Thoracic and Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | | | - Camillo Autore
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Psychology, Sapienza University, Rome, Italy
| | - Federico Perfetto
- Cardiomyopathy Unit, Careggi University Hospital, University of Florence, Florence, Italy
| | - Claudio Rapezzi
- Cardiothoracic Department, University of Ferrara, Ferrara, Italy.,Maria Cecilia Hospital, GVM Care & Research, Cotignola, Ravenna, Italy
| | - Gianfranco Sinagra
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Italy
| | - Marco Merlo
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Italy
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10
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Murray K, Wahid M, Alagiakrishnan K, Senaratne J. Clinical electrophysiology of the aging heart. Expert Rev Cardiovasc Ther 2022; 20:123-139. [PMID: 35282746 DOI: 10.1080/14779072.2022.2045196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Advancements in medical and consumer-grade technologies have made it easier than ever to monitor a patient's heart rhythm and to diagnose arrhythmias. Octogenarians with symptomatic arrhythmias have unique management challenges due to their frailty, complex drug interactions, cognitive impairment, and competing comorbidities. The management decisions are further complicated by the lack of randomized evidence to guide treatment. AREAS COVERED A comprehensive literature review was undertaken to outline various tachyarrhythmias and bradyarrhythmias and their management, the role of cardiac implantable electronic devices, cardiac ablations, and specific geriatric arrhythmia considerations as recommended in international guidelines. EXPERT OPINION Atrial fibrillation (AF) is arguably the most important arrhythmia in the elderly and is associated with significant morbidity and mortality. Early diagnosis of AF, potentially with smart devices (wearables), has the potential to reduce the incidence of stroke, systemic emboli, and the risk of dementia. Bradyarrhythmias have a high incidence in the elderly as well, often requiring implantation of a permanent pacemaker. Leadless pacemakers implanted directly into the right ventricle are great options for gaining traction in elderly patients.
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Affiliation(s)
- Kyle Murray
- Division of Cardiology, University of Alberta, Edmonton, Alberta, Canada
| | - Muizz Wahid
- Department of Internal Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Kanna Alagiakrishnan
- Division of Geriatric Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Janek Senaratne
- Division of Cardiology, University of Alberta, Edmonton, Alberta, Canada
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11
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Yin T, Shi S, Zhu X, Cheang I, Lu X, Gao R, Zhang H, Yao W, Zhou Y, Li X. A Survival Prediction for Acute Heart Failure Patients via Web-Based Dynamic Nomogram with Internal Validation: A Prospective Cohort Study. J Inflamm Res 2022; 15:1953-1967. [PMID: 35342297 PMCID: PMC8947803 DOI: 10.2147/jir.s348139] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 03/09/2022] [Indexed: 12/12/2022] Open
Abstract
Purpose The current study aimed to develop a convenient and accurate prognostic dynamic nomogram model for the risk of all-cause death in acute heart failure (AHF) patients that incorporates clinical characteristics including N-terminal pro-brain natriuretic peptide (NT-pro BNP) and growth stimulation expresses gene 2 protein (ST2). Patients and Methods We prospectively studied 537 consecutive AHF patients and derived a clinical prediction model. The least absolute shrinkage and selection operator regression model combined with clinical characteristics were used for dimensional reduction and feature selection. Multivariate Cox proportional hazard analysis and “Dynnom” package were used to build the dynamic nomogram for prediction of 1-,2-,and 5-year overall survival for AHF. With bootstrap validation, the time-dependent concordance index (C-index) and calibration curves were used to assess predictive discrimination and accuracy. The contributions of NT-pro BNP and ST2 to the nomogram were evaluated using integrated discrimination improvement (IDI) and net reclassification improvement (NRI), while decision curve analysis (DCA) was used to assess clinical value. Results Patients were randomly divided into derivation (74.9%, n=402) and validation (25.1%, n=135) cohorts. Optimal independent prognostic factors for 1-,2-, and 5-year all-cause mortality were BS-ACMR (B: NT-pro BNP; S: ST2; A: age; C: complete right bundle branch block; M: mean arterial pressure; and R: red cell distribution width >14.5%); these were incorporated into the dynamic nomogram (https://bs-acmr-nom.shinyapps.io/dynnomapp/) with bootstrap validation. The C-indexes in the derivation (0.793) and validation (0.782) cohorts were consistent with comparable performance parameters. The calibration curve showed good agreement between the nomogram-predicted and actual survival. Adding NT-pro BNP and ST2 provided a significant net benefit and improved performance over other less adequate schemes in terms of DCA of survival probability compared to those neglecting either of these two factors. Conclusion The study constructed a dynamic BS-ACMR nomogram, which is a convenient, practical and effective clinical decision-making tool for providing accurate prognosis in AHF patients.
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Affiliation(s)
- Ting Yin
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, 210029, People’s Republic of China
| | - Shi Shi
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, 210029, People’s Republic of China
| | - Xu Zhu
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, 210029, People’s Republic of China
| | - Iokfai Cheang
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, 210029, People’s Republic of China
| | - Xinyi Lu
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, 210029, People’s Republic of China
| | - Rongrong Gao
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, 210029, People’s Republic of China
| | - Haifeng Zhang
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, 210029, People’s Republic of China
- Department of Cardiology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Suzhou, 215002, People’s Republic of China
| | - Wenming Yao
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, 210029, People’s Republic of China
| | - Yanli Zhou
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, 210029, People’s Republic of China
| | - Xinli Li
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, 210029, People’s Republic of China
- Correspondence: Xinli Li; Yanli Zhou, Tel +86 136 1157 3111; +86 137 7787 9077, Email ;
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Nakazawa N, Ishizu T, Sairenchi T, Yamagishi K, Murakoshi N, Nakagawa D, Nakatsukasa T, Kawamatsu N, Sato K, Yamamoto M, Machino-Otsuka T, Xu D, Irie F, Tomizawa T, Nogami A, Aonuma K, Iso H, Ieda M, Kawakami Y, Ota H. Right bundle branch block and risk of cardiovascular mortality: the Ibaraki Prefectural Health Study. Heart Vessels 2021; 37:609-618. [PMID: 34562143 DOI: 10.1007/s00380-021-01944-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/10/2021] [Indexed: 10/20/2022]
Abstract
Historically, a right bundle branch block has been considered a benign finding in asymptomatic individuals. However, this conclusion is based on a few old studies with small sample sizes. We examined the association between a complete right bundle branch block (CRBBB) and subsequent cardiovascular mortality in the general population in Japan. In this large community-based cohort study, data of 90,022 individuals (mean age, 58.5 ± 10.2 years; 66.2% women) who participated in annual community-based health check-ups were assessed. Subjects were followed up from 1993 to the end of 2016. Cox proportional hazards' models and log-rank tests were used for the data analysis. CRBBB was documented in 1,344 participants (1.5%). Among all included participants, CRBBB was associated with an increased risk of cardiovascular mortality after adjustment for all potential confounders (hazard ratio [HR] 1.21; 95% confidence interval [CI] 1.06-1.38). The increased risk of cardiovascular mortality was particularly evident in women aged < 65 years (HR 2.00; 95% CI 1.34-2.98) and men aged ≥ 65 years (HR 1.28; 95% CI 1.06-1.55). CRBBB is associated with an increased risk of cardiovascular mortality in women aged < 65 years and men aged ≥ 65 years. Clinicians should be aware of the presence of CRBBB in young women and elderly men, even if they exhibit no symptoms.
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Affiliation(s)
- Naomi Nakazawa
- Department of Clinical Laboratory Medicine, University of Tsukuba, Tsukuba, Japan.,Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan.,Ibaraki Health Plaza, Ibaraki Health Service Association, Mito, Japan
| | - Tomoko Ishizu
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan. .,Ibaraki Health Plaza, Ibaraki Health Service Association, Mito, Japan.
| | - Toshimi Sairenchi
- Ibaraki Health Plaza, Ibaraki Health Service Association, Mito, Japan.,Center for Research Collaboration and Support, Comprehensive Research Facilities for Advanced Medical Science, Dokkyo Medical University, Mibu, Japan
| | - Kazumasa Yamagishi
- Department of Public Health Medicine, University of Tsukuba, Tsukuba, Japan
| | - Nobuyuki Murakoshi
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - Daishi Nakagawa
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - Tomofumi Nakatsukasa
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - Naoto Kawamatsu
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - Kimi Sato
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - Masayoshi Yamamoto
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - Tomoko Machino-Otsuka
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - DongZhu Xu
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - Fujiko Irie
- Department of Health and Welfare, Ibaraki Prefectural Office, Mito, Japan
| | | | - Akihiko Nogami
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - Kazutaka Aonuma
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - Hiroyasu Iso
- Department of Social and Environmental Medicine, Osaka University, Osaka, Japan
| | - Masaki Ieda
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Japan
| | - Yasushi Kawakami
- Department of Clinical Laboratory Medicine, University of Tsukuba, Tsukuba, Japan
| | - Hitoshi Ota
- Ibaraki Health Plaza, Ibaraki Health Service Association, Mito, Japan
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Darmon A, Ducrocq G, Elbez Y, Popovic B, Sorbets E, Ferrari R, Ford I, Tardif JC, Tendera M, Fox KM, Steg PG. Prevalence, Incidence and Prognostic Implications of Left Bundle Branch Block in Patients with Chronic Coronary Syndromes (From the CLARIFY Registry). Am J Cardiol 2021; 150:40-46. [PMID: 34011435 DOI: 10.1016/j.amjcard.2021.03.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 03/21/2021] [Accepted: 03/23/2021] [Indexed: 01/17/2023]
Abstract
Left Bundle Branch Block (LBBB) is a frequently encountered electrical abnormality in patients with chronic (more than 3 months after myocardial infarction, or evidence of coronary artery disease with ischemia) coronary syndromes (CCS), but its prognostic significance remains unclear. We aimed to describe the prevalence, incidence and five-year outcomes of LBBB in outpatients with CCS using the CLARIFY registry. Main outcome was a composite of CV death, MI or stroke. Secondary outcomes included all cause death, hospitalization for heart failure (HF) and permanent pacemaker implantation. Among 23.544 patients with available information regarding LBBB status at baseline, 1.041 (4.4%) had LBBB at baseline and 1.015 (4.5%) patients developed a new LBBB during 5-year follow-up. In multivariate analysis, LBBB at baseline was not associated with the composite outcome of CV death, MI or stroke (HR 1.06, 95% CI [0.86 - 1.31], p = 0.67) or the risk of all-cause death (HR 1.07, 95% CI [0.87 - 1.32], p = 0.52) but was significantly associated with a higher risk of hospitalization for HF (HR 1.50, 95% CI [1.21 - 1.88], p < 0.001) and permanent pacemaker implantation (HR 2.11, 95% CI [1.45 - 3.07], p < 0.001). The main factors associated with new-onset LBBB were male sex (HR 0.8 [0.66-0.98], p = 0.028) history of atrial fibrillation (HR 1.29, 95% CI [1.01 - 1.64], p = 0.04), CABG (HR 1.27, [1.08 - 1.51], p = 0.004) and MI (HR 1.19, 95% CI [1.01 - 1.40], p = 0.034). In conclusion, in a contemporary registry of outpatients with CCS, the prevalence of LBBB was 4.4% and the additional 5-years incidence 6.2%. LBBB, in itself, was not associated with a higher risk of major adverse cardiovascular events or all cause mortality. It was however an independent predictor of risk of hospitalization for heart failure and permanent pacemaker implantation.
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Affiliation(s)
- Arthur Darmon
- Université de Paris, Assistance Publique - Hôpitaux de Paris; FACT, French Alliance for Cardiovascular Trials, Département Hospitalo-Universitaire FIRE, Hôpital Bichat, Paris, France.
| | - Gregory Ducrocq
- Université de Paris, Assistance Publique - Hôpitaux de Paris; FACT, French Alliance for Cardiovascular Trials, Département Hospitalo-Universitaire FIRE, Hôpital Bichat, Paris, France
| | - Yedid Elbez
- FACT, French Alliance for Cardiovascular Trials, Département Hospitalo-Universitaire FIRE, Hôpital Bichat, Paris, France
| | - Batric Popovic
- Département de Cardiologie, Centre Hospitalier Universitaire de Nancy, France
| | - Emmanuel Sorbets
- Université de Paris, Assistance Publique - Hôpitaux de Paris; FACT, French Alliance for Cardiovascular Trials, Département Hospitalo-Universitaire FIRE, Hôpital Bichat, Paris, France; Assistance Publique - Hopitaux de Paris, Hôtel Dieu, Centre de Diagnostic et de Thérapeutique; INSERM U-1148, Laboratory for Vascular Translationnal Science
| | - Roberto Ferrari
- Department of Cardiology, University Hospital of Ferrara and Maria Cecilia Hospital, GVM Care & Research, Cotignola, Italy
| | - Ian Ford
- Robertson Centre for Biostatistics, University of Glasgow, Glasgow, United Kingdom
| | | | - Michal Tendera
- Department of Cardiology and Structural Heart Disease, Medical University of Silesia, School of Medicine in Katowice, Katowice, Poland
| | - Kim M Fox
- National Heart and Lung Institute, Royal Brompton Hospital, Imperial College, London, United Kingdom
| | - Philippe Gabriel Steg
- Université de Paris, Assistance Publique - Hôpitaux de Paris; FACT, French Alliance for Cardiovascular Trials, Département Hospitalo-Universitaire FIRE, Hôpital Bichat, Paris, France; INSERM U-1148, Laboratory for Vascular Translationnal Science; National Heart and Lung Institute, Royal Brompton Hospital, Imperial College, London, United Kingdom
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14
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Ponnusamy SS, Vijayaraman P. Left Bundle Branch Block-induced Cardiomyopathy: Insights From Left Bundle Branch Pacing. JACC Clin Electrophysiol 2021; 7:1155-1165. [PMID: 33812829 DOI: 10.1016/j.jacep.2021.02.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/01/2021] [Accepted: 02/03/2021] [Indexed: 12/29/2022]
Abstract
OBJECTIVES The aim of the study was to report the efficacy of left bundle branch pacing (LBBP) in the management of left bundle branch block (LBBB)-induced cardiomyopathy (LIC). BACKGROUND Chronic LBBB is known to cause mechanical dyssynchrony and cardiomyopathy. Hyperresponse to cardiac resynchronization therapy (CRT) with biventricular pacing (BVP) is a hallmark of LIC. LBBP has recently shown promise as an alternative to BVP. METHODS Patients undergoing CRT between 2018 and 2020 were retrospectively screened, and those who met the criteria for LIC were included in the study. Duration of LBBB, CRT type, and response were documented. Pacing parameters, and electrocardiographic and echocardiographic data were collected. RESULTS Possible LIC was identified in 17 of 159 patients undergoing CRT and LBBP was successfully performed in 13 patients. Duration of LBBB before left ventricular dysfunction was 4.2 ± 3.9 years. Temporary His bundle pacing corrected underlying LBBB in all patients. During LBBP, there was significant reduction in QRS duration (167.8 ± 11.6 ms to 110.4 ± 13.1 ms; p < 0.0001) and repolarization parameters of QTc, Tpeak-Tend, and Tpeak-Tend/QTc ratio. LBBP threshold and R waves at implant were 0.53 ± 0.21 V/0.5 ms and 11.7 ± 7.1 mV and remained stable. Cardiac magnetic resonance imaging showed no evidence of scar (n = 8). During follow-up, left ventricular ejection fraction improved from 30.4 ± 6.6% to 57.4 ± 4.7% (p < 0.0001) and New York Heart Association functional class improved from 3.1 ± 0.3 to 1.2 ± 0.4 (p < 0.0001) compared with baseline. CONCLUSIONS LBBP is a reasonable option for CRT in patients with LIC, as it provides low and stable capture threshold with complete correction of underlying electrical and mechanical abnormalities associated with LBBB.
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Affiliation(s)
| | - Pugazhendhi Vijayaraman
- Geisinger Heart Institute, Geisinger Commonwealth School of Medicine, Wilkes-Barre, Pennsylvania, USA.
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Delise P, Rivetti L, Poletti G, Centa M, Allocca G, Sitta N, Cati A, Turiano G, Lanari E, Zeppilli P, Sciarra L. Clinical and Prognostic Significance of Idiopathic Left Bundle-Branch Block in Young Adults. Cardiol Res Pract 2021; 2021:6677806. [PMID: 33777448 PMCID: PMC7969112 DOI: 10.1155/2021/6677806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/01/2021] [Accepted: 03/01/2021] [Indexed: 11/30/2022] Open
Abstract
AIMS LBBB is rare in healthy young adults, and its long-term prognosis is uncertain. METHODS 56 subjects (aged <50 years), in whom an LBBB was discovered by chance in the absence of clinical and echocardiographic evidence of heart disease, were collected in a multicenter registry. RESULTS 69% were males. Mean age at the time of discovery of LBBB was 37 ± 11 years. Mean QRS duration was 149 ± 17 m sec and 35% had left axis deviation. All patients had a normal echocardiogram, except for left ventricular dyssynchrony; 37 patients underwent coronary angiography (30) or myocardial scintigraphy during effort Eriksson and Wilhelmsen (2005), and in all cases obstructive coronary artery disease was excluded. In 2/30 patients who underwent coronary angiography, an anomalous origin of the CX artery from the right coronary sinus was found. Thirty patients underwent cardiac magnetic resonance; in 60% it was normal, while in 40% it revealed late enhancement, which in 33% was localized in the basal septum, suggesting fibrosis of the left bundle branch. During follow-up (12+/10 years, median 10 years) no sudden death occurred. At the end of follow-up, all patients were alive, except for one who suffered accidental death. Two patients (3.5%) underwent PM implantation owing to syncope. The echocardiogram at the end of follow-up revealed LV dysfunction in only one patient. CONCLUSIONS In young adults without apparent heart disease, LBBB is a heterogeneous condition. In the vast majority of cases, the prognosis is good and no ventricular dysfunction occurs over time. However, as only 18% of our patients were aged >60 years at the end of follow-up, we cannot establish the prognosis in older age-groups.
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Affiliation(s)
- Pietro Delise
- Division of Cardiology, P. Pederzoli Hospital, Peschiera Del Garda, Italy
| | - Luigi Rivetti
- Division of Cardiology, Conegliano Hospital, Conegliano, TV, Italy
| | | | - Monica Centa
- Division of Cardiology, Conegliano Hospital, Conegliano, TV, Italy
| | - Giuseppe Allocca
- Division of Cardiology, Conegliano Hospital, Conegliano, TV, Italy
| | - Nadir Sitta
- Division of Cardiology, Conegliano Hospital, Conegliano, TV, Italy
| | - Arianna Cati
- Division of Cardiology, Conegliano Hospital, Conegliano, TV, Italy
| | - Giovanni Turiano
- Division of Cardiology, Hospital of S. Donà di Piave, S. Donà di Piave, Italy
| | - Emanuela Lanari
- Division of Cardiology, Conegliano Hospital, Conegliano, TV, Italy
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Søndergaard MM, Riis J, Bodker KW, Hansen SM, Nielsen J, Graff C, Pietersen AH, Nielsen JB, Tayal B, Polcwiartek C, Torp-Pedersen C, Soegaard P, Kragholm KH. Associations between left bundle branch block with different PR intervals, QRS durations, heart rates and the risk of heart failure: a register-based cohort study using ECG data from the primary care setting. Open Heart 2021; 8:e001425. [PMID: 33574021 PMCID: PMC7880100 DOI: 10.1136/openhrt-2020-001425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 11/26/2020] [Accepted: 12/01/2020] [Indexed: 11/30/2022] Open
Abstract
AIM Left bundle branch block (LBBB) is associated with an increased risk of heart failure (HF). We assessed the impact of common ECG parameters on this association using large-scale data. METHODS AND RESULTS Using ECGs recorded in a large primary care population from 2001 to 2011, we identified HF-naive patients with a first-time LBBB ECG. We obtained information on sex, age, emigration, medication, diseases and death from Danish registries. We investigated the association between the PR interval, QRS duration, and heart rate and the risk of HF over a 2-year follow-up period using Cox regression analysis.Of 2471 included patients with LBBB, 464 (18.8%) developed HF during follow-up. A significant interaction was found between QRS duration and heart rate (p<0.01), and the analyses were stratified on these parameters. Using a QRS duration <150 ms and a heart rate <70 beats per minute (bpm) as the reference, all groups were statistically significantly associated with the development of HF. Patients with a QRS duration ≥150 ms and heart rate ≥70 bpm had the highest risk of developing HF (HR 3.17 (95% CI 2.41 to 4.18, p<0.001). There was no association between the PR interval and HF after adjustment. CONCLUSION Prolonged QRS duration and higher heart rate were associated with increased risk of HF among primary care patients with LBBB, while no association was observed with PR interval. Patients with LBBB with both a prolonged QRS duration (≥150 ms) and higher heart rate (≥70 bpm) have the highest risk of developing HF.
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Affiliation(s)
| | - Johannes Riis
- Department of Clinical Epidemiology, Aalborg University Hospital, Aalborg, Denmark
| | | | - Steen Møller Hansen
- Department of Clinical Epidemiology, Aalborg University Hospital, Aalborg, Denmark
| | - Jesper Nielsen
- Department of Clinical Epidemiology, Aalborg University Hospital, Aalborg, Denmark
| | - Claus Graff
- Department of Health, Science and Technology, Aalborg University Faculty of Health Sciences, Aalborg, Denmark
| | - Adrian Holger Pietersen
- Department of Cardiology, Nephrology and Endocrinology, Nordsjaellands Hospital, Hillerod, Denmark
| | - Jonas Bille Nielsen
- University of Copenhagen, Danish National Research Foundation Centre for Cardiac Arrhythmia (DARC), Copenhagen, Denmark
- Department of Cardiology, Laboratory of Molecular Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Bhupendar Tayal
- Department of Cardiology, Hospital Vendsyssel in Hjørring, Hjorring, Denmark
| | - Christoffer Polcwiartek
- Department of Clinical Epidemiology, Aalborg University Hospital, Aalborg, North Denmark Region, Denmark
| | | | - Peter Soegaard
- Cardiology Clinic Heart-Lung, Aalborg University Hospital, Aalborg, Denmark
| | - Kristian Hay Kragholm
- Department of Clinical Epidemiology, Aalborg University Hospital, Aalborg, Denmark
- Department of Cardiology, Regional Hospital North Jutland, Hjorring, Denmark
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Faisal M, Mumtaz Z, Mueed A, Ali S, Raza HH, Khan S, Salma S, Mujtaba M, Karim M, Qadir F. Routine Measurement of Thyroid Stimulating Hormone in Patients Presenting With Third-Degree Atrioventricular Block: Do We Really Need It? Cureus 2021; 13:e12712. [PMID: 33614317 PMCID: PMC7883583 DOI: 10.7759/cureus.12712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background Hypothyroidism can be a cause of sinus bradycardia. However, thyroid laboratory evaluation is often performed routinely in patients with complete heart block (CHB) though there is little data to support this practice. This study aimed to assess the frequency of thyroid dysfunction in patients presenting with CHB without clinical features of hypothyroidism. Methodology All patients referred for permanent pacemaker implantation for CHB were included in this cross-sectional study. Patients with known thyroid disorder or clinical features of thyroid disorder were excluded. Demographic, electrocardiography (EKG), and routine thyroid stimulating hormone (TSH) screening results were recorded. Results A total of 102 patients with complete atrioventricular (AV) block were enrolled in the study of which 50.0% (51) were male. The mean age was 61.09 ± 11.74. Co-morbidities included diabetes mellitus 44.1% (45), smoking 36.3% (37), and hypertension 55.9% (57). Mean EKG atrial rate was 82.97 ± 31.31 mmHg with a mean ventricular escape rate of 36.17 ± 5.93. Permanent pacemakers were implanted in all of the patients. Only one patient had an abnormal TSH. Conclusions We found a very low prevalence of thyroid dysfunction among patients without clinical features of thyroid dysfunction presenting with third-degree AV block. This calls for cautious prescription of thyroid testing in clinically euthyroid patients.
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Affiliation(s)
- Muhammad Faisal
- Electrophysiology, National Institute of Cardiovascular Diseases, Karachi, PAK
| | - Zubair Mumtaz
- Electrophysiology, National Institute of Cardiovascular Diseases, Karachi, PAK
| | - Abdul Mueed
- Electrophysiology, National Institute of Cardiovascular Diseases, Karachi, PAK
| | - Sajid Ali
- Electrophysiology, National Institute of Cardiovascular Diseases, Karachi, PAK
| | - Haseeb H Raza
- Electrophysiology, National Institute of Cardiovascular Diseases, Karachi, PAK
| | - Samra Khan
- Medicine, Liaquat National Hospital, Karachi, PAK
| | - Sayeda Salma
- Cardiology, National Institute of Cardiovascular Diseases, Karachi, PAK
| | - Mustajab Mujtaba
- Cardiology, National Institute of Cardiovascular Diseases, Karachi, PAK
| | - Musa Karim
- Research, National Institute of Cardiovascular Diseases, Karachi, PAK
| | - Faisal Qadir
- Electrophysiology, National Institute of Cardiovascular Diseases, Karachi, PAK
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Affiliation(s)
- Yochai Birnbaum
- The Section of CardiologyBaylor College of MedicineHoustonTX
| | - Kjell Nikus
- Faculty of Medicine and Health TechnologyTampere University and Heart CenterTampere University HospitalTampereFinland
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Prognostic value and prevalence of complete right bundle branch block in an elderly population: a community-based 10-year prospective study. Aging (Albany NY) 2020; 12:19073-19082. [PMID: 33021491 PMCID: PMC7732323 DOI: 10.18632/aging.103702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 07/06/2020] [Indexed: 01/24/2023]
Abstract
Complete right bundle branch block (CRBBB) occurs in 0.2% to 1.3% of the general population, but its prognostic significance in the geriatric population is unknown. We prospectively investigated the prevalence and prognostic value of CRBBB in individuals aged ≥65 years in a community-based population in Taiwan. A total of 5,830 community-dwelling individuals were prospectively recruited from 7 regions across Taiwan starting in December 2008 through March 2013. Those aged ≥65 years were included in the analysis (N=3,383). All subjects underwent a home visit and standardized medical exams and were followed up annually until the end of April 2019; cause of death was documented by citizen death records. The mean age of the study cohort was 73.5±5.9 years (65-104), and 47.21% were men. Among these individuals, 171 (5.05%) had CRBBB; the prevalence was higher in men (7.08%) than in women (3.25%). Subjects with CRBBB were older than those without CRBBB (75.4±6.5 vs. 73.4±5.9), and the frequency of CRBBB increased with age. Survival analysis revealed that all-cause mortality and cardiac mortality were similar in individuals with and without CRBBB during a mean follow-up of 92.6±23.6 months. CRBBB is not associated with increased risk of mortality in the geriatric population.
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20
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Rankinen J, Haataja P, Lyytikäinen LP, Huhtala H, Lehtimäki T, Kähönen M, Eskola M, Pérez-Riera AR, Jula A, Niiranen T, Nikus K, Hernesniemi J. Relation of intraventricular conduction delay to risk of new-onset heart failure and structural heart disease in the general population. IJC HEART & VASCULATURE 2020; 31:100639. [PMID: 33015317 PMCID: PMC7522339 DOI: 10.1016/j.ijcha.2020.100639] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 09/07/2020] [Accepted: 09/10/2020] [Indexed: 01/14/2023]
Abstract
Subjects with high-risk of developing heart failure ought to be identified. Non-specific IVCD and LBBB were associated with risk of new-onset heart failure. LBBB also carried a risk of novel structural heart disease in 15-year follow-up. Their presence should alert clinician even in subjects free of any known heart disease. Right bundle branch block and other blocks were not associated with increased risk.
Background Intraventricular conduction delays (IVCDs) are hallmarks of heart failure (HF) and structural heart disease (SHD) but their prognostic value for HF and SHD is unclear. Methods Relation of eight IVCDs and the incidence of first-time HF or SHD was studied in a nationally representative random sample of 6080 Finnish subjects aged ≥ 30 years (mean age 52.1, SD 14.5 years) who participated in the health examination including 12-lead ECG. Results During 16.5 years’ follow up, half of the subjects with left bundle branch block (LBBB) and one third of the subjects with non-specific IVCD developed HF. After controlling for known clinical risk factors the hazard ratio (HR) for new-onset HF for LBBB was 3.29 (95% confidence interval 1.93–5.63, P < 0.001) and 3.53 for non-specific IVCD (1.65–7.55, P = 0.001). In corresponding analysis, LBBB predicted SHD with HR 2.60 (1.21–5.62, P = 0.015). Excluding subjects with history of heart disease, including coronary heart disease, did not have impact on results. Right bundle branch block and other IVCDs displayed no relation to endpoints. Conclusion LBBB and non-specific IVCD were associated with more than three-fold risk of new-onset HF. Furthermore, LBBB was associated with novel SHD. Their presence should alert clinician even in subjects free from any known heart disease.
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Affiliation(s)
- Jani Rankinen
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland
| | - Petri Haataja
- Heart Center, Department of Cardiology, Tampere University Hospital, Tampere, Finland
| | - Leo-Pekka Lyytikäinen
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland.,Heart Center, Department of Cardiology, Tampere University Hospital, Tampere, Finland.,Department of Clinical Chemistry, Tampere University Hospital, and Fimlab Laboratories, Tampere, Finland
| | - Heini Huhtala
- Faculty of Social Sciences, Tampere University, Tampere, Finland
| | - Terho Lehtimäki
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland.,Department of Clinical Chemistry, Tampere University Hospital, and Fimlab Laboratories, Tampere, Finland
| | - Mika Kähönen
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland.,Department of Clinical Physiology, Tampere University Hospital, Tampere, Finland
| | - Markku Eskola
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland.,Heart Center, Department of Cardiology, Tampere University Hospital, Tampere, Finland
| | - Andrés Ricardo Pérez-Riera
- Design of Studies and Scientific Writing Laboratory, ABC School of Medicine, Santo André, São Paulo, Brazil
| | - Antti Jula
- The Finnish Institute for Health and Welfare, Helsinki/Turku, Finland
| | - Teemu Niiranen
- The Finnish Institute for Health and Welfare, Helsinki/Turku, Finland
| | - Kjell Nikus
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland.,Heart Center, Department of Cardiology, Tampere University Hospital, Tampere, Finland
| | - Jussi Hernesniemi
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland.,Heart Center, Department of Cardiology, Tampere University Hospital, Tampere, Finland
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21
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Sharma S, Barot HV, Schwartzman AD, Ganatra S, Shah SP, Venesy DM, Patten RD. Risk and predictors of dyssynchrony cardiomyopathy in left bundle branch block with preserved left ventricular ejection fraction. Clin Cardiol 2020; 43:1494-1500. [PMID: 32940385 PMCID: PMC7724243 DOI: 10.1002/clc.23467] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/07/2020] [Accepted: 09/10/2020] [Indexed: 01/21/2023] Open
Abstract
Background Left bundle branch block (LBBB) and left ventricular (LV) dyssynchrony likely contribute to progressive systolic dysfunction. The evaluation of newly recognized LBBB includes screening for structural heart abnormalities and coronary artery disease (CAD). In patients whose LV ejection fraction (EF) is preserved during initial testing, the incidence of subsequent cardiomyopathy is not firmly established. Hypothesis The risk of developing LV systolic dysfunction among LBBB patients with preserved LVEF is high enough to warrant serial imaging. Methods We screened records of 1000 consecutive patients with LBBB from our ECG database and identified subjects with an initially preserved LVEF (≥45%) without clinically relevant CAD or other cause for cardiomyopathy. Baseline imaging, clinical data, and follow‐up imaging were recorded to determine the risk of subsequent LV systolic dysfunction (LVEF ≤40%). Results (Data are mean + SD) 784 subjects were excluded, the majority for CAD or depressed LVEF upon initial imaging. Of the remaining 216, 37 (17%) developed a decline in LVEF(≤40%) over a mean follow‐up of 55 ± 31 months; 94% of these patients had a baseline LVEF≤60% and LV end systolic diameter (ESD) ≥ 2.9 cm indicating that these measures may be useful to define which patients warrant longitudinal follow‐up. The negative predictive value of a LVEF>60% and LVESD <2.9 cm was 98%. Conclusions Seventeen percent of patients with LBBB and initial preserved LVEF develop dyssynchrony cardiomyopathy. We believe the risk of developing dyssynchrony cardiomyopathy is high enough to warrant serial assessment of LV systolic function in this high‐risk population.
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Affiliation(s)
- Sunita Sharma
- From the Division of Cardiovascular MedicineLahey Hospital and Medical CenterBurlingtonMassachusettsUSA
| | - Harsh V. Barot
- From the Division of Cardiovascular MedicineLahey Hospital and Medical CenterBurlingtonMassachusettsUSA
| | - Andrew D. Schwartzman
- From the Division of Cardiovascular MedicineLahey Hospital and Medical CenterBurlingtonMassachusettsUSA
| | - Sarju Ganatra
- From the Division of Cardiovascular MedicineLahey Hospital and Medical CenterBurlingtonMassachusettsUSA
| | - Sachin P. Shah
- From the Division of Cardiovascular MedicineLahey Hospital and Medical CenterBurlingtonMassachusettsUSA
| | - David M. Venesy
- From the Division of Cardiovascular MedicineLahey Hospital and Medical CenterBurlingtonMassachusettsUSA
| | - Richard D. Patten
- From the Division of Cardiovascular MedicineLahey Hospital and Medical CenterBurlingtonMassachusettsUSA
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22
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Rankinen J, Haataja P, Lyytikäinen LP, Huhtala H, Lehtimäki T, Kähönen M, Eskola M, Pérez-Riera AR, Jula A, Rissanen H, Nikus K, Hernesniemi J. Long-term outcome of intraventricular conduction delays in the general population. Ann Noninvasive Electrocardiol 2020; 26:e12788. [PMID: 32804416 PMCID: PMC7816813 DOI: 10.1111/anec.12788] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 06/07/2020] [Accepted: 06/22/2020] [Indexed: 11/29/2022] Open
Abstract
Background Previous population studies have presented conflicting results regarding the prognostic impact of intraventricular conduction delays (IVCD). Methods We studied long‐term prognostic impact and the association with comorbidities of eight IVCDs in a random sample of 6,299 Finnish subjects (2,857 men and 3,442 women, mean age 52.8, SD 14.9 years) aged 30 or over who participated in the health examination including 12‐lead ECG. For left bundle branch block (LBBB) and non‐specific IVCD (NSIVCD), two different definitions were used. Results During 16.5 years’ follow‐up, 1,309 of the 6,299 subjects (20.8%) died and of these 655 (10.4%) were cardiovascular (CV) deaths. After controlling for known clinical risk factors, the hazard ratio for CV death, compared with individuals without IVCD, was 1.55 for the Minnesota definition of LBBB (95% confidence interval 1.04–2.31, p = .032) and 1.27 (95% confidence interval 0.80–2.02, p = .308) for the Strauss’ definition of LBBB. Subjects with NSIVCD were associated with twofold to threefold increase in CV mortality depending on the definition. While right bundle branch block, left anterior fascicular block and incomplete bundle branch blocks were associated with seemingly higher mortality, this was no longer the case after adjustment for age and sex. The presence of R‐R’ pattern was not associated with any adverse outcome. Conclusions In a population study with long‐term follow‐up, NSIVCD and Minnesota definition of LBBB were independently associated with CV mortality. Other IVCDs had no significant impact on prognosis. The prognostic impact of LBBB and NSIVCD was affected by the definition of the conduction disorder.
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Affiliation(s)
- Jani Rankinen
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland
| | - Petri Haataja
- Heart Center, Department of Cardiology, Tampere University Hospital, Tampere, Finland
| | - Leo-Pekka Lyytikäinen
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland.,Heart Center, Department of Cardiology, Tampere University Hospital, Tampere, Finland.,Department of Clinical Chemistry, Tampere University Hospital, and Fimlab Laboratories, Tampere, Finland
| | - Heini Huhtala
- Faculty of Social Sciences, Tampere University, Tampere, Finland
| | - Terho Lehtimäki
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland.,Department of Clinical Chemistry, Tampere University Hospital, and Fimlab Laboratories, Tampere, Finland
| | - Mika Kähönen
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland.,Department of Clinical Physiology, Tampere University Hospital, Tampere, Finland
| | - Markku Eskola
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland.,Heart Center, Department of Cardiology, Tampere University Hospital, Tampere, Finland
| | | | - Antti Jula
- The Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Harri Rissanen
- The Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Kjell Nikus
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland.,Heart Center, Department of Cardiology, Tampere University Hospital, Tampere, Finland
| | - Jussi Hernesniemi
- Faculty of Medicine and Health Technology, Tampere University, and Finnish Cardiovascular Research Center, Tampere, Finland.,Heart Center, Department of Cardiology, Tampere University Hospital, Tampere, Finland
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23
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Donnellan E, Wazni OM, Saliba WI, Hanna M, Kanj M, Patel DR, Wilner B, Kochar A, Jaber WA. Prevalence, Incidence, and Impact on Mortality of Conduction System Disease in Transthyretin Cardiac Amyloidosis. Am J Cardiol 2020; 128:140-146. [PMID: 32650908 DOI: 10.1016/j.amjcard.2020.05.021] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/10/2020] [Accepted: 05/12/2020] [Indexed: 10/24/2022]
Abstract
Transthyretin cardiac amyloidosis (ATTR-CA) is an increasingly recognized infiltrative cardiomyopathy in which conduction system disease is common. The aim of our study was to define the incidence and prevalence of high-grade atrioventricular (AV) block requiring pacemaker implantation in our quaternary referral center. This was a single-center retrospective cohort study of 369 consecutive patients with ATTR-CA who underwent 12-lead electrocardiogram at the time of ATTR-CA diagnosis. During a mean follow-up of 28 months, serial ECGs and the electronic medical record were examined for the development of high-grade AV block and pacemaker implantation. Wild-type ATTR-CA (wtATTR-CA) was diagnosed in 261 patients and 108 had hereditary ATTR-CA (hATTR-CA). A total of 35 (9.5%) had high-grade AV block requiring pacemaker implantation at the time of diagnosis of ATTR-CA. The most common conduction abnormalities evident on the baseline ECG were a wide QRS complex, present in 51% with wtATTR-CA and 48% with hATTR-CA (p = 0.62), followed by first-degree AV block, which was present in 49% with wtATTR-CA and 43% with hATTR-CA (p = 0.31). During follow-up, high-grade AV block developed in 10% of those with hATTR-CA and 12% of patients with wtATTR-CA (p = 0.64). On multivariable models, high-grade AV block was not significantly associated with increased mortality. More advanced ATTR-CA stage and a history of obstructive coronary artery disease were associated with increased mortality on multivariable models. In conclusion, the incidence and prevalence of high-grade AV block is high in patients with ATTR-CA. Patients with ATTR-CA require close monitoring during follow-up for the development of conduction system disease.
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24
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Guettler N, Bron D, Manen O, Gray G, Syburra T, Rienks R, d'Arcy J, Davenport ED, Nicol ED. Management of cardiac conduction abnormalities and arrhythmia in aircrew. Heart 2020; 105:s38-s49. [PMID: 30425085 PMCID: PMC6256301 DOI: 10.1136/heartjnl-2018-313057] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 06/03/2018] [Accepted: 06/11/2018] [Indexed: 11/15/2022] Open
Abstract
Cardiovascular diseasesi are the most common cause of loss of flying licence globally, and cardiac arrhythmia is the main disqualifier in a substantial proportion of aircrew. Aircrewii often operate within a demanding physiological environment, that potentially includes exposure to sustained acceleration (usually resulting in a positive gravitational force, from head to feet (+Gz)) in high performance aircraft. Aeromedical assessment is complicated further when trying to discriminate between benign and potentially significant rhythm abnormalities in aircrew, many of whom are young and fit, have a resultant high vagal tone, and among whom underlying cardiac disease has a low prevalence. In cases where a significant underlying aetiology is plausible, extensive investigation is often required and where appropriate should include review by an electrophysiologist. The decision regarding restriction of flying activity will be dependent on several factors including the underlying arrhythmia, associated pathology, risk of incapacitation and/or distraction, the type of aircraft operated, and the specific flight or mission criticality of the role performed by the individual aircrew.
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Affiliation(s)
- Norbert Guettler
- German Air Force Center for Aerospace Medicine, Fuerstenfeldbruck, Germany
| | - Dennis Bron
- Aeromedical Centre, Swiss Air Force, Dubendorf, Switzerland
| | - Olivier Manen
- Aviation Medicine Department, AeMC, Percy Military Hospital, Clamart, France
| | - Gary Gray
- Canadian Forces Environmental Medical Establishment, Toronto, Ontario, Canada
| | - Thomas Syburra
- Cardiac Surgery Department, Luzerner Kantonsspital, Luzern, Switzerland
| | - Rienk Rienks
- Department of Cardiology, University Medical Center Utrecht and Central Military Hospital, Utrecht, The Netherlands
| | - Joanna d'Arcy
- Royal Air Force Aviation Clinical Medicine Service, RAF Centre of Aviation Medicine, RAF Henlow, Bedfordshire, UK
| | - Eddie D Davenport
- Aeromedical Consult Service, USAF School of Aerospace Medicine, Wright-Patterson AFB, Ohio, USA
| | - Edward D Nicol
- Royal Air Force Aviation Clinical Medicine Service, RAF Centre of Aviation Medicine, RAF Henlow, Bedfordshire, UK
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25
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Abstract
Left bundle branch block may be due to conduction system degeneration or a reflection of myocardial pathology. Left bundle branch block may also develop following aortic valve disease or cardiac procedures. Patients with heart failure with reduced ejection fraction and left bundle branch block may respond positively to cardiac resynchronization therapy. Lead placement via the coronary sinus is the mainstay approach of cardiac resynchronization therapy. However, other options, including physiological pacing, are being explored. In this review, we summarize the salient pathophysiologic and clinical aspects of left bundle branch block, as well as current and future strategies for management.
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Affiliation(s)
- Nicholas Y Tan
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
| | - Chance M Witt
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
| | - Jae K Oh
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
| | - Yong-Mei Cha
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
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26
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Parasuraman S, Schwarz K, Singh S, Abraham D, Garg D, Frenneaux MP. Cardiopulmonary exercise test in myocardial ischemia detection. Future Cardiol 2020; 16:113-121. [PMID: 32081024 DOI: 10.2217/fca-2019-0022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Exercise electrocardiography has low sensitivity for detection of myocardial ischemia. However, when combined with cardiopulmonary exercise testing (CPEX), the sensitivity and specificity of ischemia detection improves significantly. CPEX offers unique advantages over imaging techniques in tricky situations such as balanced ischemia. Early abnormal oxygen uptake would point toward profound coronary stenosis that could be missed in perfusion imaging. CPEX could be an invaluable tool in asymptomatic left bundle branch block pattern, without exposing patients to the risks of computerized tomography or invasive coronary angiography. Normal oxygen uptake curves would rule out significant coronary stenosis as the cause of left bundle branch block pattern. Elseways, abnormal oxygen uptake in patients with normal coronary arteries could indicate microvascular angina. Furthermore, exercise capacity is an excellent predictor of cardiovascular risk in those with and without heart disease. Using two clinical cases we introduce the concept of gas-exchange and hemodynamic changes encountered in ischemic heart disease.
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Affiliation(s)
| | | | - Satnam Singh
- Royal Bournemouth Hospital, Castle Lane East, Bournemouth, UK
| | - Dilip Abraham
- Norfolk & Norwich University Hospital, Colney Lane, Norwich, UK
| | - Deepak Garg
- Dr Gray's Hospital, Pluscarden Road, Elgin, UK
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27
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Uhm JS, Lee Y, Roh YH, Lee J, Kang D, Jin MN, Kim IS, Yu HT, Kim TH, Kim JY, Joung B, Pak HN, Lee MH. Nonspecific intraventricular conduction delay is associated with future occurrence of atrial fibrillation in patients with structurally normal heart. Eur J Intern Med 2020; 72:67-72. [PMID: 31735548 DOI: 10.1016/j.ejim.2019.11.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 11/03/2019] [Accepted: 11/07/2019] [Indexed: 12/23/2022]
Abstract
BACKGROUND We aimed to elucidate the long-term prognosis of nonspecific intraventricular conduction delay (NIVCD) in patients with structurally normal heart. METHODS We included 107,838 patients (age, 52.1 ± 15.5 years; men, 46.8%) who underwent electrocardiography in outpatient clinics or medical checkup (unmatched cohort). NIVCD was defined as QRS duration ≥110 ms without meeting the criteria for bundle branch block. Patients with structurally normal heart and sinus rhythm were assigned to the NIVCD and normal QRS groups according to propensity score with matching variables of age, sex, hypertension, and diabetes (matched cohort 1), and additional PR interval (matched cohort 2). Baseline characteristics, electrocardiographic parameters, and clinical outcomes were compared in the unmatched cohort and the matched cohort. RESULTS In the unmatched cohort, the frequencies of male sex and preexisting atrial fibrillation were significantly higher in the NIVCD group than in the normal QRS group. In matched cohort 1 (n = 690), the NIVCD group exhibited significant slower sinus rate and longer PR interval than the normal QRS group. In matched cohort 2 (n = 598), the cumulative incidence of atrial fibrillation was significantly higher in the NIVCD group than in the normal QRS group during a follow-up period of 8.8 ± 2.9 years. NIVCD significantly increased the risk for AF (hazard ratio, 2.571; 95% confidence interval, 1.074-6.156; p = 0.034). CONCLUSIONS It is suggested that NIVCD may be associated with future occurrence of atrial fibrillation in patients with structurally normal heart and sinus rhythm.
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Affiliation(s)
- Jae-Sun Uhm
- Division of Cardiology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Youngchae Lee
- Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Yun Ho Roh
- Biostatistics Collaboration Unit, Department of Biomedical Systems Informatics, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jinae Lee
- Biostatistics Collaboration Unit, Department of Biomedical Systems Informatics, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Dongseon Kang
- Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Moo-Nyun Jin
- Division of Cardiology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul 03722, Republic of Korea
| | - In-Soo Kim
- Division of Cardiology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Hee Tae Yu
- Division of Cardiology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Tae-Hoon Kim
- Division of Cardiology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Jong-Youn Kim
- Division of Cardiology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Gangnam-gu, Seoul, Republic of Korea
| | - Boyoung Joung
- Division of Cardiology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Hui-Nam Pak
- Division of Cardiology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Moon-Hyoung Lee
- Division of Cardiology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro Seodaemun-gu, Seoul 03722, Republic of Korea.
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28
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Oechslin L, Hofer D, Hermann M. [CME: Left Bundle Branch Block and Painful Left Bundle Branch Block Syndrome]. PRAXIS 2020; 109:1017-1025. [PMID: 33050815 DOI: 10.1024/1661-8157/a003543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
CME: Left Bundle Branch Block and Painful Left Bundle Branch Block Syndrome Abstract. Left bundle branch block (LBBB) is the electrocardiographic correlate of a pathologic transmission of the electrical signals in the myocardium which can lead to a dyssynchronous left ventricular activation and thus to an inefficient contraction of the ventricles. It is usually the expression of an underlying cardiopathy and represents an independent risk factor of cardiovascular mortality, therefore further examination is indicated in each case. Besides the treatment of an underlying disease, a specific therapy has been available since the introduction of cardiac resynchronization therapy (CRT). A rarer phenomenon is the painful left bundle branch block in structurally healthy hearts.
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Affiliation(s)
| | - Daniel Hofer
- Klinik für Kardiologie, Universitätsspital Zürich
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29
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Bengtsson K, Klingberg E, Deminger A, Wallberg H, Jacobsson LTH, Bergfeldt L, Forsblad-d'Elia H. Cardiac conduction disturbances in patients with ankylosing spondylitis: results from a 5-year follow-up cohort study. RMD Open 2019; 5:e001053. [PMID: 31798955 PMCID: PMC6861087 DOI: 10.1136/rmdopen-2019-001053] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 09/27/2019] [Accepted: 10/18/2019] [Indexed: 02/06/2023] Open
Abstract
Objectives To describe electrocardiographic (ECG) development in patients with ankylosing spondylitis (AS) and identify associations between baseline characteristics and cardiac conduction disturbances (CCD) at 5-year follow-up. Methods In a longitudinal cohort study, 172 patients (54% men, mean age (SD) of 50 (13) years at baseline) with AS underwent ECG, physical examination, questionnaires and laboratory testing at baseline and at 5-year follow-up. Descriptive statistics and univariate and age- and sex-adjusted logistic regression analyses were used. CCD included both atrioventricular and intraventricular blocks. Results Twenty-three of the 172 patients (13.4%) had a CCD at follow-up. Eight patients had developed a new CCD and eight had normalised their ECG. In the age- and sex-adjusted analyses, CCD at baseline (OR 24.8, 95% CI 7.3 to 84.5), male sex (OR 6.4, 95% CI 2.0 to 20.8), history of anterior uveitis (OR 4.4, 95% CI 1.3 to 14.5), higher ASDAS-CRP (OR 2.3, 95% CI 1.3 to 4.0), greater waist circumference (OR 1.3, 95% CI 1.1 to 1.6, per 5 cm), and medication with antiplatelets (OR 7.0, 95% CI 1.5 to 31.8) and beta-blockers (OR 3.4, 95% CI 1.0 to 11.5) were associated with a CCD at follow-up. Higher age and longer symptom duration were highly correlated and were both associated with a CCD at follow-up. Conclusions The presence of CCD in AS is in part dynamic and associated with both AS and non-AS characteristics. Our results suggest that patients especially prone to present with CCDs are older men with a previous CCD, longer symptom duration, higher AS disease activity, a history of anterior uveitis and medication reflecting cardiovascular disease.
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Affiliation(s)
- Karin Bengtsson
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden.,Department of Rheumatology, Sahlgrenska University Hospital, Västra Götalandsregionen, Gothenburg, Sweden
| | - Eva Klingberg
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden.,Department of Rheumatology, Sahlgrenska University Hospital, Västra Götalandsregionen, Gothenburg, Sweden
| | - Anna Deminger
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden.,Department of Rheumatology, Sahlgrenska University Hospital, Västra Götalandsregionen, Gothenburg, Sweden
| | - Hanna Wallberg
- Department of Anesthesiology and Intensive Care, NU Hospital Group, Västra Götalandsregionen, Trollhättan, Sweden
| | - Lennart T H Jacobsson
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden.,Department of Rheumatology, Sahlgrenska University Hospital, Västra Götalandsregionen, Gothenburg, Sweden
| | - Lennart Bergfeldt
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden.,Department of Cardiology, Sahlgrenska University Hospital, Västra Götalandsregionen, Gothenburg, Sweden
| | - Helena Forsblad-d'Elia
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden.,Department of Public Health and Clinical Medicine, Rheumatology, Umeå University, Umeå, Sweden
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Paixão GMM, Lima EM, Gomes PR, Ferreira MPF, Oliveira DM, Ribeiro MH, Ribeiro AH, Nascimento JS, Canazart JA, Ribeiro LB, Ribeiro AL. Evaluation of mortality in bundle branch block patients from an electronic cohort: Clinical Outcomes in Digital Electrocardiography (CODE) study. J Electrocardiol 2019; 57S:S56-S60. [PMID: 31653433 DOI: 10.1016/j.jelectrocard.2019.09.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 08/27/2019] [Accepted: 09/04/2019] [Indexed: 10/26/2022]
Abstract
BACKGROUND Left bundle branch block is recognized as a marker of higher risk of death, but the prognostic value of the right bundle branch block in the general population is still controversial. Our aim is to evaluate the risk of overall and cardiovascular mortality in patients with right (RBBB) and left bundle branch block (LBBB) in a large electronic cohort of Brazilian patients. METHODS This observational retrospective study was developed with the database of digital ECGs from Telehealth Network of Minas Gerais, Brazil (TNMG). All ECGs performed from 2010 to 2017 in primary care patients over 16 years old were assessed. The electronic cohort was obtained by linking data from ECG exams (name, sex, date of birth, city of residence) and those from national mortality information system, using standard probabilistic linkage methods (FRIL: Fine-grained record linkage software, v.2.1.5, Atlanta, GA). Only the first ECG of each patient was considered. Clinical data were self-reported, and ECGs were interpreted manually by cardiologists and automatically by the Glasgow University Interpreter software. Hazard ratio (HR) for mortality was estimated using Cox regression. RESULTS From a dataset of 1,773,689 patients, 1,558,421 primary care patients over 16 years old underwent a valid ECG recording during 2010 to 2017. We excluded 17,359 patients that didn't have a valid QRS measure from the Glasgow program and 11,091 patients from the control group that had QRS equal or above 120 ms and were not RBBB or LBBB. Therefore, 1,529,971 were included (median age 52 [Q1:38; Q3:65] years; 40.2% were male). In a mean follow-up of 3.7 years, the overall mortality rate was 3.34%. RBBB was more frequent (2.42%) than LBBB (1.32%). In multivariate analysis, adjusting for sex, age and comorbidities, both patients with RBBB (HR 1.32; CI 95% 1.27-1.37) and LBBB (HR 1.69; CI 95% 1.62-1.76) had higher risk of overall mortality. Women with RBBB had an increased risk of all-cause death compared to men (p < 0.001). Cardiovascular mortality was higher in patients with LBBB (HR 1.77; CI 95% 1.55-2.01), but not for RBBB. CONCLUSIONS Patients with RBBB and LBBB had higher risk of overall mortality. Women with RBBB had more risk of all-cause death than men. LBBB was associated with higher risk of cardiovascular mortality.
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Affiliation(s)
- Gabriela M M Paixão
- Telehealth Network of Minas Gerais, Hospital das Clínicas and Faculdade de Medicina, Universidade Federal de Minas Gerais, Avenida Professor Alfredo Balena 110, Belo Horizonte, Minas Gerais 30130-100, Brazil.
| | - Emilly M Lima
- Telehealth Network of Minas Gerais, Hospital das Clínicas and Faculdade de Medicina, Universidade Federal de Minas Gerais, Avenida Professor Alfredo Balena 110, Belo Horizonte, Minas Gerais 30130-100, Brazil
| | - Paulo R Gomes
- Telehealth Network of Minas Gerais, Hospital das Clínicas and Faculdade de Medicina, Universidade Federal de Minas Gerais, Avenida Professor Alfredo Balena 110, Belo Horizonte, Minas Gerais 30130-100, Brazil
| | - Milton P F Ferreira
- Telehealth Network of Minas Gerais, Hospital das Clínicas and Faculdade de Medicina, Universidade Federal de Minas Gerais, Avenida Professor Alfredo Balena 110, Belo Horizonte, Minas Gerais 30130-100, Brazil
| | - Derick M Oliveira
- Telehealth Network of Minas Gerais, Hospital das Clínicas and Faculdade de Medicina, Universidade Federal de Minas Gerais, Avenida Professor Alfredo Balena 110, Belo Horizonte, Minas Gerais 30130-100, Brazil
| | - Manoel H Ribeiro
- Telehealth Network of Minas Gerais, Hospital das Clínicas and Faculdade de Medicina, Universidade Federal de Minas Gerais, Avenida Professor Alfredo Balena 110, Belo Horizonte, Minas Gerais 30130-100, Brazil
| | - Antonio H Ribeiro
- Telehealth Network of Minas Gerais, Hospital das Clínicas and Faculdade de Medicina, Universidade Federal de Minas Gerais, Avenida Professor Alfredo Balena 110, Belo Horizonte, Minas Gerais 30130-100, Brazil
| | - Jamil S Nascimento
- Telehealth Network of Minas Gerais, Hospital das Clínicas and Faculdade de Medicina, Universidade Federal de Minas Gerais, Avenida Professor Alfredo Balena 110, Belo Horizonte, Minas Gerais 30130-100, Brazil
| | - Jéssica A Canazart
- Telehealth Network of Minas Gerais, Hospital das Clínicas and Faculdade de Medicina, Universidade Federal de Minas Gerais, Avenida Professor Alfredo Balena 110, Belo Horizonte, Minas Gerais 30130-100, Brazil
| | - Leonardo B Ribeiro
- Telehealth Network of Minas Gerais, Hospital das Clínicas and Faculdade de Medicina, Universidade Federal de Minas Gerais, Avenida Professor Alfredo Balena 110, Belo Horizonte, Minas Gerais 30130-100, Brazil
| | - Antonio L Ribeiro
- Telehealth Network of Minas Gerais, Hospital das Clínicas and Faculdade de Medicina, Universidade Federal de Minas Gerais, Avenida Professor Alfredo Balena 110, Belo Horizonte, Minas Gerais 30130-100, Brazil
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Kiehl EL, Menon V, Mandsager KT, Wolski KE, Wisniewski L, Nissen SE, Lincoff AM, Borer JS, Lüscher TF, Cantillon DJ. Effect of Left Ventricular Conduction Delay on All-Cause and Cardiovascular Mortality (from the PRECISION Trial). Am J Cardiol 2019; 124:1049-1055. [PMID: 31395295 DOI: 10.1016/j.amjcard.2019.06.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 06/18/2019] [Accepted: 06/19/2019] [Indexed: 10/26/2022]
Abstract
The prognosis associated with prolonged intraventricular conduction on electrocardiogram (ECG) remains uncertain. We aimed to compare clinical outcomes of narrow versus prolonged intraventricular conduction on ECG stratified by QRS morphology and cardiovascular disease (CVD) status. A post-hoc analysis was performed of the randomized-control PRECISION trial. Patients with centrally adjudicated, nonpaced baseline ECGs were included. QRS duration was classified narrow (≤100 ms) versus prolonged (>100 ms) with additional categorization into left (LBBB) or right (RBBB) bundle branch block or nonspecific intraventricular conduction delay (IVCD). IVCD was subclassified if left ventricular conduction delay (LVCD) was present (L-IVCD) or absent (O-IVCD). The primary outcome was adjudicated all-cause and cardiovascular (CV) mortality. Of 24,081 patients randomized, 22,067 (92%) were included with follow-up 34 ± 13 months. Study patients were 63 ± 9 years, 64% female, 75% Caucasian, 23% with established CVD. The prevalence of QRS prolongation was 5.6% (1,240): 760 right bundle branch block (3.4%), 313 LBBB (1.4%), and 161 IVCD (0.7%), 95 subclassified L-IVCD (0.4%). After adjustment, LBBB and L-IVCD were similarly associated with increased all-cause (LBBB: 2.3 [1.4 to 3.8], p = 0.001; L-IVCD: 4.0 [2.1 to 7.9], p <0.001) and CV (LBBB: 3.6 [2.0 to 6.5], p <0.001; L-IVCD 3.6 [1.3 to 9.7], p = 0.001) mortality. The presence of LVCD (LBBB or L-IVCD) was associated with all-cause (2.8 [1.8 to 4.2], p <0.001) and CV (3.6 [2.2 to 6.1], p <0.001) mortality exceeding the observed risks of coronary artery disease, left ventricular hypertrophy, or diabetes. The LVCD hazard persisted across QRS durations (100 to 120 vs >120 ms) and CVD status. In conclusion, LVCD, whether LBBB or L-IVCD, was strongly associated with increased mortality in patients with and at-risk for CVD.
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Model of Anisotropic Reverse Cardiac Growth in Mechanical Dyssynchrony. Sci Rep 2019; 9:12670. [PMID: 31481725 PMCID: PMC6722088 DOI: 10.1038/s41598-019-48670-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 08/09/2019] [Indexed: 11/18/2022] Open
Abstract
Based on recent single-cell experiments showing that longitudinal myocyte stretch produces both parallel and serial addition of sarcomeres, we developed an anisotropic growth constitutive model with elastic myofiber stretch as the growth stimuli to simulate long-term changes in biventricular geometry associated with alterations in cardiac electromechanics. The constitutive model is developed based on the volumetric growth framework. In the model, local growth evolutions of the myocyte’s longitudinal and transverse directions are driven by the deviations of maximum elastic myofiber stretch over a cardiac cycle from its corresponding local homeostatic set point, but with different sensitivities. Local homeostatic set point is determined from a simulation with normal activation pattern. The growth constitutive model is coupled to an electromechanics model and calibrated based on both global and local ventricular geometrical changes associated with chronic left ventricular free wall pacing found in previous animal experiments. We show that the coupled electromechanics-growth model can quantitatively reproduce the following: (1) Thinning and thickening of the ventricular wall respectively at early and late activated regions and (2) Global left ventricular dilation as measured in experiments. These findings reinforce the role of elastic myofiber stretch as a growth stimulant at both cellular level and tissue-level.
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Cui H, Schaff HV, Nishimura RA, Geske JB, Dearani JA, Lahr BD, Ommen SR. Conduction Abnormalities and Long-Term Mortality Following Septal Myectomy in Patients With Obstructive Hypertrophic Cardiomyopathy. J Am Coll Cardiol 2019; 74:645-655. [DOI: 10.1016/j.jacc.2019.05.053] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 05/16/2019] [Accepted: 05/21/2019] [Indexed: 10/26/2022]
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Alventosa-Zaidin M, Guix Font L, Benitez Camps M, Roca Saumell C, Pera G, Alzamora Sas MT, Forés Raurell R, Rebagliato Nadal O, Dalfó-Baqué A, Brugada Terradellas J. Right bundle branch block: Prevalence, incidence, and cardiovascular morbidity and mortality in the general population. Eur J Gen Pract 2019; 25:109-115. [PMID: 31339387 PMCID: PMC6713172 DOI: 10.1080/13814788.2019.1639667] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Background: Right bundle branch block (RBBB) is among the most common electrocardiographic abnormalities. Objectives: To establish the prevalence and incidence of RBBB in the general population without cardiovascular events (CVE) and whether RBBB increases cardiovascular morbidity and mortality compared with patients with a normal electrocardiogram (ECG). Methods: A historical study of two cohorts including 2981 patients from 29 primary health centres without baseline CVE. Cox (for CVE) and logistic (for cardiovascular factors) regression was used to assess their association with RBBB. Results: Of the patients (58% women; mean age 65.9), 92.2% had a normal ECG, 4.6% incomplete RBBB (iRBBB) and 3.2% complete RBBB (cRBBB). Mean follow-up was five years. Factors associated with appearance of cRBBB were male sex (HR = 3.8; 95%CI: 2.4-6.1) and age (HR = 1.05 per year; 95%CI: 1.03-1.08). In a univariate analysis, cRBBB was associated with an increase in all-cause mortality but only bifascicular block (BFB) was significant after adjusting for confounders. cRBBB tended to increase CVE but the results were not statistically significant. Presence of iRBBB was not associated with adverse outcomes. Patients with iRBBB who progressed to cRBBB showed a higher incidence of heart failure and chronic kidney disease. Conclusion: In this general population cohort with no CV disease, 8% had RBBB, with a higher prevalence among men and elderly patients. Although all-cause mortality and CVE tended to increase in the presence of cRBBB, only BFB showed a statistically significant association with cRBBB. Patients with iRBBB who progressed to cRBBB had a higher incidence of CVE. We detected no effect of iRBBB on morbidity and mortality.
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Affiliation(s)
- M Alventosa-Zaidin
- a Centre d'Atenció Primària Arenys de Mar, Servei d'atenció Primària Barcelonès Nord- Maresme, Institut Català de la Salut , Barcelona , Spain
| | - L Guix Font
- b Centre d'Atenció Primària Berga, Servei d'atenció Primària Bages- Berguedà-Solsonés, Institut Català de la Salut , Barcelona , Spain
| | - M Benitez Camps
- c Centre d'Atenció Primària Gòtic, Servei d'atenció Primària Barcelona Litoral, Institut Català de la Salut , Barcelona , Spain
| | - C Roca Saumell
- d Centre d'Atenció Primària El Clot, Servei d'atenció Primària Barcelona Dreta-Muntanya, Institut Català de la Salut , Barcelona , Spain.,e Faculty of Medicine, University of Barcelona , Barcelona , Spain
| | - G Pera
- f Unitat de Suport a la Recerca Metropolitana Nord, Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol) , Barcelona , Spain
| | - M Teresa Alzamora Sas
- f Unitat de Suport a la Recerca Metropolitana Nord, Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol) , Barcelona , Spain.,g Centre d'Atenció Primària Riu-Nord Riu-Sud Santa Coloma de Gramenet, Servei d'atenció Primària Barcelonès Nord i Maresme, Institut Català de la Salut , Barcelona , Spain
| | - R Forés Raurell
- f Unitat de Suport a la Recerca Metropolitana Nord, Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol) , Barcelona , Spain.,g Centre d'Atenció Primària Riu-Nord Riu-Sud Santa Coloma de Gramenet, Servei d'atenció Primària Barcelonès Nord i Maresme, Institut Català de la Salut , Barcelona , Spain
| | - O Rebagliato Nadal
- c Centre d'Atenció Primària Gòtic, Servei d'atenció Primària Barcelona Litoral, Institut Català de la Salut , Barcelona , Spain.,f Unitat de Suport a la Recerca Metropolitana Nord, Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol) , Barcelona , Spain
| | - A Dalfó-Baqué
- c Centre d'Atenció Primària Gòtic, Servei d'atenció Primària Barcelona Litoral, Institut Català de la Salut , Barcelona , Spain
| | - J Brugada Terradellas
- e Faculty of Medicine, University of Barcelona , Barcelona , Spain.,h Departament de Cardiologia, Hospital Clínic de Barcelona , Barcelona , Spain
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Impaired Recovery of Left Ventricular Function in Patients With Cardiomyopathy and Left Bundle Branch Block. J Am Coll Cardiol 2019; 71:306-317. [PMID: 29348023 DOI: 10.1016/j.jacc.2017.11.020] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 11/02/2017] [Accepted: 11/06/2017] [Indexed: 11/21/2022]
Abstract
BACKGROUND Patients with left bundle branch block (LBBB) often respond to cardiac resynchronization therapy (CRT) with left ventricular ejection fraction (LVEF) improvement. Guideline-directed medical therapy (GDMT), not CRT, is first-line therapy for patients with reduced LVEF with LBBB. However, there are little data on how patients with reduced LVEF and LBBB respond to GDMT. OBJECTIVES This study examined patients with cardiomyopathy and sought to assess rates of LVEF improvement for patients with LBBB compared to other QRS morphologies. METHODS Using data from the Duke Echocardiography Laboratory Database, the study identified patients with baseline electrocardiography and LVEF ≤35% who had a follow-up LVEF 3 to 6 months later. The study excluded patients with severe valve disease, a cardiac device, left ventricular assist device, or heart transplant. QRS morphology was classified as LBBB, QRS duration <120 ms (narrow QRS duration), or a wide QRS duration ≥120 ms but not LBBB. Analysis of variance testing compared mean change in LVEF among the 3 groups with adjustment for significant comorbidities and GDMT. RESULTS There were 659 patients that met the criteria: 111 LBBB (17%), 59 wide QRS duration ≥120 ms but not LBBB (9%), and 489 narrow QRS duration (74%). Adjusted mean increase in LVEF over 3 to 6 months in the 3 groups was 2.03%, 5.28%, and 8.00%, respectively (p < 0.0001). Results were similar when adjusted for interim revascularization and myocardial infarction. Comparison of mean LVEF improvement between patients with LBBB on GDMT and those not on GDMT showed virtually no difference (3.50% vs. 3.44%). The combined endpoint of heart failure hospitalization or mortality was highest for patients with LBBB. CONCLUSIONS LBBB is associated with a smaller degree of LVEF improvement compared with other QRS morphologies, even with GDMT. Some patients with LBBB may benefit from CRT earlier than guidelines currently recommend.
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Freitas SA, MacKenzie R, Wylde DN, Von Bergen J, Holowaty JC, Beckman M, Rigatti SJ, Zamarripa D, Gill S. All-Cause Mortality for Life Insurance Applicants with the Presence of Bundle Branch Block. J Insur Med 2019; 48:36-47. [PMID: 31219368 DOI: 10.17849/insm-48-1-1-12.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Objective.-To determine the all-cause mortality of life insurance applicants who have a bundle branch block. Background.-Bundle branch block is an electrocardiographic pattern that has variable prognostic implications. Research studies have shown that both left and right bundle branch block are associated with increased mortality among cases that have heart disease. In the general population and life insurance applicant population, the prevalence of bundle branch block is relatively low, and its effects on long-term prognosis are not as well established. Methodology.-Life insurance applicants with reported bundle branch block were extracted from data covering United States residents between October 2009 and October 2016. Information about these applicants was matched to the Social Security Death Master (SSDMF) file for deaths occurring from 2009 to 2012 and to another commercially available death source file (Other Death Source, ODS) for deaths occurring from 2009 to 2016 to determine vital status. Actual to expected (A/E) mortality ratios were calculated using the Society of Actuaries 2015 Valuation Basic Table (2015VBT), select and ultimate table (age last birthday). All expected bases were not smoker distinct. Confidence bands around these mortality ratios were calculated. The variables of interest were applicant age, gender, location of the bundle branch block, and the presence of cardiac or cardiovascular conditions. Results.-There were 258,529.85 person-years exposure for applicants with bundle branch block. Of the applicants, 57.2% had right bundle branch block. Of person-years exposure, 11.5% had a cardiac condition along with the bundle branch block, and 4.4% had an underlying cardiovascular condition. Female mortality ratios were higher than those for males, but due to the low number of deaths, this difference was not significant. Left bundle branch block mortality ratios (1.01) were 1.4 times higher than those with right (0.74). Those applicants with a cardiac condition along with their bundle branch block had between 1.6 to 1.8 times the mortality ratio depending on the bundle branch block location, and those with a cardiovascular condition had between 1.5 to 1.7 times the mortality ratio over those applicants with just bundle branch block alone. Conclusion.-The presence of bundle branch block in an insurance applicant may be associated with increased all-cause mortality. In this study, life insurance applicants overall had a mortality slightly lower than the expected mortality based on the 2015 VBT. However, applicants with bundle branch block and a cardiac or cardiovascular comorbid condition had a significantly higher mortality ratio.
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Kaess BM, Andersson C, Duncan MS, Larson MG, Aasbjerg K, Gislason GH, Torp-Pedersen C, Vasan RS. Familial Clustering of Cardiac Conduction Defects and Pacemaker Insertion. Circ Arrhythm Electrophysiol 2019; 12:e007150. [PMID: 31216886 DOI: 10.1161/circep.119.007150] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The etiopathogenesis of electrocardiographic bundle branch and atrioventricular blocks is not fully understood. We investigated familial clustering of cardiac conduction defects and pacemaker insertion in the FHS (Framingham Heart Study). Additionally, we assessed familial clustering of pacemaker insertion in the Danish general population. METHODS In FHS, we used multivariable-adjusted logistic regression models to investigate the association of parental atrioventricular block (PR interval, ≥0.2 s), complete bundle branch block (QRS, ≥0.12 s), or pacemaker insertion with the occurrence of cardiac conduction abnormalities in their offspring. The Danish nationwide administrative registries were interrogated to assess the relations of parental pacemaker insertion with offspring pacemaker insertion. RESULTS In FHS (n=371 cases with first-degree atrioventricular block, complete bundle branch block, or pacemaker insertion, and 1471 age- and sex-matched controls), individuals with at least 1 affected parent with a conduction defect had a 1.65-fold odds (odds ratio, 95% CI, 1.32-2.07) for manifesting an atrioventricular block and a 1.62-fold odds (95% CI, 1.08-2.42) for developing a complete bundle branch block. If at least 1 parent had any electrocardiographic conduction defect or pacemaker insertion, the offspring had a 1.62-fold odds (95% CI, 1.31-2.00) for experiencing any of these conditions. In Denmark (n=2 824 199 individuals; 5397 incident pacemaker implantations), individuals with at least 1 first-degree relative with history of pacemaker insertion had a multivariable-adjusted 1.68-fold (incidence rate ratio, 95% CI, 1.49-1.89) risk of undergoing a pacemaker insertion. If the affected relative was ≤45 years of age, the incidence rate ratio was markedly increased to 51.0 (95% CI, 32.7-79.9). CONCLUSIONS Cardiac conduction blocks and risk for pacemaker insertion cluster within families. A family history of conduction system disturbance or pacemaker insertion should trigger increased awareness of a similar propensity in other family members, especially so when the conduction system disease occurs at a younger age.
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Affiliation(s)
- Bernhard M Kaess
- National Heart, Lung, and Blood Institute's Framingham Heart Study, MA (B.M.K., C.A., M.S.D., M.G.L., R.S.V.).,Department of Cardiology, Deutsches Herzzentrum München, Munich, Germany (B.M.K.).,Department of Internal Medicine I, St. Josefs-Hospital, Wiesbaden, Germany (B.M.K.)
| | - Charlotte Andersson
- National Heart, Lung, and Blood Institute's Framingham Heart Study, MA (B.M.K., C.A., M.S.D., M.G.L., R.S.V.).,Department of Cardiology, Herlev and Gentofte Hospital, Hellerup, Denmark (C.A., G.H.G.)
| | - Meredith S Duncan
- National Heart, Lung, and Blood Institute's Framingham Heart Study, MA (B.M.K., C.A., M.S.D., M.G.L., R.S.V.).,Department of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN (M.S.D.)
| | - Martin G Larson
- National Heart, Lung, and Blood Institute's Framingham Heart Study, MA (B.M.K., C.A., M.S.D., M.G.L., R.S.V.).,Department of Biostatistics, Boston University School of Public Health, MA (M.G.L.)
| | - Kristian Aasbjerg
- Department of Health Science and Technology, Institute of Health, Science and Technology, Aalborg University, Denmark (K.A., C.T.-P.)
| | - Gunnar H Gislason
- Department of Cardiology, Herlev and Gentofte Hospital, Hellerup, Denmark (C.A., G.H.G.).,The Danish Heart Foundation, Copenhagen (G.H.G.).,National Institute of Public Health, University of Southern Denmark, Copenhagen (G.H.G.).,Faculty of Health Sciences, University of Copenhagen, Denmark (G.H.G.)
| | - Christian Torp-Pedersen
- Department of Health Science and Technology, Institute of Health, Science and Technology, Aalborg University, Denmark (K.A., C.T.-P.)
| | - Ramachandran S Vasan
- National Heart, Lung, and Blood Institute's Framingham Heart Study, MA (B.M.K., C.A., M.S.D., M.G.L., R.S.V.).,Department of Medicine, Boston University School of Medicine, MA (R.S.V.).,Department of Epidemiology, Boston University School of Public Health, MA (R.S.V.)
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Alventosa-Zaidin M, Pera G, Roca Saumell C, Mengual Miralles N, Zamora Sanchez MV, Gros Garcia T, Guix Font L, Benitez Camps M, Francisco-Pascual J, Brugada Terradellas J. Diagnosis of right bundle branch block: a concordance study. BMC FAMILY PRACTICE 2019; 20:58. [PMID: 31060516 PMCID: PMC6501399 DOI: 10.1186/s12875-019-0946-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 04/15/2019] [Indexed: 11/10/2022]
Abstract
BACKGROUND Right bundle branch block is one of the most common electrocardiographic abnormalities. Most cases of right bundle branch block are detected in asymptomatic patients in primary care, so a correct interpretation of electrocardiograms (ECGs) at this level is necessary. The objective of this research is to determine the degree of concordance in the diagnosis of incomplete and complete right bundle branch block between four primary care researchers and a cardiologist. METHODS The research design is a retrospective cohort study of patients over 18 years of ages of patients over 18 years of ages who underwent an ECG for any reason and were diagnosed with right bundle branch block by their physician. The physicians participating, 4 primary care researchers and a cardiologist were specialized in interpreting electrocardiographic records. The diagnosis of incomplete and complete right bundle branch block was recorded and other secondary variables were analysed. In case of diagnostic discordance between the researchers, the ECGs were reviewed by an expert cardiologist, who interpreted them, established the diagnosis and analysed the possible causes for the discrepancy. RESULTS We studied 160 patients diagnosed with right bundle branch block by their general practise. The patients had a mean age of 64.8 years and 54% of them were men. The concordance in the diagnosis of incomplete right bundle branch block showed a Fleiss' kappa index (k) of 0.71 among the five researchers and of 0.85 among only the primary care researchers. The k for complete right bundle branch block was 0.93 among the five researchers and 0.96 among only the primary care researchers. CONCLUSION The interobserver agreement in the diagnosis of right bundle branch block performed by physicians specialized in ECG interpretation (primary care physicians and a cardiologist) was very good. The variability was greater for the diagnosis of incomplete right bundle branch block.
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Affiliation(s)
- M Alventosa-Zaidin
- Bon Pastor, Primary Healthcare Center, Catalan Health Institute, Barcelona, Catalonia, Spain.
| | - G Pera
- Unitat de Suport a la Recerca Metropolitana Nord, Fundació Institut Universitari per a la recerca a l'Atenció Primària de Salut Jordi Gol i Gurina (IDIAPJGol), Mataró, Spain
| | - C Roca Saumell
- EAP El Clot, Primary Healthcare Center, Catalan Health Institute, University of Barcelona, Barcelona, Spain
| | - N Mengual Miralles
- EAP Ronda Cerdanya, Primary Healthcare Center, Catalan Health Institute, Mataró, Barcelona, Spain
| | - M V Zamora Sanchez
- EAP El Gòtic, Primary Healthcare Center, Catalan Health Institute, Barcelona, Spain
| | - T Gros Garcia
- EAP Ronda Cerdanya, Primary Healthcare Center, Catalan Health Institute, Mataró, Barcelona, Spain
| | - L Guix Font
- EAP Berga, Primary Healthcare Center, Catalan Health Institute, Berga, Barcelona, Spain
| | - M Benitez Camps
- EAP El Gòtic, Primary Healthcare Center, Catalan Health Institute, Barcelona, Spain
| | - J Francisco-Pascual
- Unity of arithmies. Servei de cardiologia. University Hospital Vall Hebrón, Research Institut, Universitat Autònoma de Barcelona, CIBER-CV, Barcelona, Spain
| | - J Brugada Terradellas
- Cardiovascular Institute, Hospital Clínic, University of Barcelona, Catalonia, Spain
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Kerola T, Eranti A, Aro AL, Haukilahti MA, Holkeri A, Junttila MJ, Kenttä TV, Rissanen H, Vittinghoff E, Knekt P, Heliövaara M, Huikuri HV, Marcus GM. Risk Factors Associated With Atrioventricular Block. JAMA Netw Open 2019; 2:e194176. [PMID: 31125096 PMCID: PMC6632153 DOI: 10.1001/jamanetworkopen.2019.4176] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
IMPORTANCE Pacemaker implantations as a treatment for atrioventricular (AV) block are increasing worldwide. Prevention strategies for AV block are lacking because modifiable risk factors have not yet been identified. OBJECTIVE To identify risk factors for AV block in community-dwelling individuals. DESIGN, SETTING, AND PARTICIPANTS In this population-based cohort study, data from the Mini-Finland Health Survey, conducted from January 1, 1978, to December 31, 1980, were used to examine demographics, comorbidities, habits, and laboratory and electrocardiographic (ECG) measurements as potential risk factors for incident AV block. Data were ascertained during follow-up from January 1, 1987, through December 31, 2011, using a nationwide registry. A total of 6146 community-dwelling individuals were included in the analysis performed from January 15 through April 3, 2018. MAIN OUTCOMES AND MEASURES Incidence of AV block (hospitalization for second- or third-degree AV block). RESULTS Among the 6146 participants (3449 [56.1%] women; mean [SD] age, 49.2 [12.9] years), 529 (8.6%) had ECG evidence of conduction disease and 58 (0.9%) experienced a hospitalization with AV block. Older age (hazard ratio [HR] per 5-year increment, 1.34; 95% CI, 1.16-1.54; P < .001), male sex (HR, 2.04; 95% CI, 1.19-3.45; P = .01), a history of myocardial infarction (HR, 3.54; 95% CI, 1.33-9.42; P = .01), and a history of congestive heart failure (HR, 3.33; 95% CI, 1.10-10.09; P = .03) were each independently associated with AV block. Two modifiable risk factors were also independently associated with AV block. Every 10-mm Hg increase in systolic blood pressure was associated with a 22% higher risk (HR, 1.22; 95% CI, 1.10-1.34; P = .005), and every 20-mg/dL increase in fasting glucose level was associated with a 22% higher risk (HR, 1.22; 95% CI, 1.08-1.35; P = .001). Both risk factors remained statistically significant (HR for systolic blood pressure, 1.26 [95% CI, 1.06-1.49; P = .007]; HR for glucose level, 1.22 [95% CI, 1.04-1.43; P = .01]) after adjustment for major adverse coronary events during the follow-up period. In population-attributable risk assessment, an estimated 47% (95% CI, 8%-67%) of AV blocks may have been avoided if all participants exhibited ideal blood pressure and 11% (95% CI, 2%-21%) may have been avoided if all had a normal fasting glucose level. CONCLUSIONS AND RELEVANCE In this analysis of data from a population-based cohort study, suboptimal blood pressure and fasting glucose level were associated with AV block. These results suggest that a large proportion of AV blocks are assocated with these risk factors, even after adjusting for other major adverse coronary events.
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Affiliation(s)
- Tuomas Kerola
- Department of Internal Medicine, Päijät-Häme Central Hospital, Lahti, Finland
- Electrophysiology Section, Division of Cardiology, University of California, San Francisco
| | - Antti Eranti
- Department of Internal Medicine, Päijät-Häme Central Hospital, Lahti, Finland
| | - Aapo L. Aro
- Division of Cardiology, Heart and Lung Center, Helsinki University Hospital, Helsinki, Finland
| | - M. Anette Haukilahti
- Research Unit of Internal Medicine, Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Arttu Holkeri
- Division of Cardiology, Heart and Lung Center, Helsinki University Hospital, Helsinki, Finland
| | - M. Juhani Junttila
- Research Unit of Internal Medicine, Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Tuomas V. Kenttä
- Research Unit of Internal Medicine, Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Harri Rissanen
- The National Institute for Health and Welfare, Helsinki, Finland
| | - Eric Vittinghoff
- Department of Epidemiology and Biostatistics, University of California, San Francisco
| | - Paul Knekt
- The National Institute for Health and Welfare, Helsinki, Finland
| | | | - Heikki V. Huikuri
- Research Unit of Internal Medicine, Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Gregory M. Marcus
- Electrophysiology Section, Division of Cardiology, University of California, San Francisco
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Pérez-Riera AR, Barbosa-Barros R, Daminello-Raimundo R, de Abreu LC, de Almeida MC, Rankinen J, Baeub Soler F, Nikus K. Re-evaluating the electro-vectorcardiographic criteria for left bundle branch block. Ann Noninvasive Electrocardiol 2019; 24:e12644. [PMID: 30938470 DOI: 10.1111/anec.12644] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/03/2019] [Accepted: 01/23/2019] [Indexed: 11/26/2022] Open
Abstract
The criteria for left bundle branch block have gained growing interest in the last few years. In this overview, we discuss diagnostic and prognostic aspects of different criteria. It was already shown that stricter criteria, including longer QRS duration and slurring/notching of the QRS, better identify responders to cardiac resynchronization therapy. We also include aspects of ST/T concordance and discordance and vectorcardiography, which could further improve in the fine-tuning of the left bundle branch criteria.
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Affiliation(s)
| | - Raimundo Barbosa-Barros
- Coronary Center, de Messejana Hospital Dr. Carlos Alberto Studart Gomes, Fortaleza, Ceará, Brazil
| | | | - Luiz Carlos de Abreu
- Study Design and Scientific Writing Laboratory, ABC Faculty of Medicine, Santo André, São Paulo, Brazil
| | - Marcos Célio de Almeida
- IInstitute of Biology-Genetics and Morphology, University of Brasília, Brasília, Federal District, Brazil
| | - Jani Rankinen
- Heart Center, Tampere University Hospital and Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | | | - Kjell Nikus
- Heart Center, Tampere University Hospital and Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
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CRT Pacing: Midterm Follow-Up in LV Only Pacing without RV Lead in Patients with Normal AV Conduction. J Clin Med 2018; 7:jcm7120531. [PMID: 30544823 PMCID: PMC6306808 DOI: 10.3390/jcm7120531] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 11/30/2018] [Accepted: 12/05/2018] [Indexed: 12/03/2022] Open
Abstract
Background: The aim of our study was to assess the real life cardiac resynchronization therapy (CRT) fusion left ventricular (LV) only pacing in patients with normal AV conduction (NAVc) without right ventricular (RV) lead. Methods: Consecutive NAVc patients with CRT indication were implanted with a right atrium RA/LV DDD pacing system. Complete follow-up at 1, 3 and every 6 months thereafter included echocardiography and stress testing. Results: We analysed 55 patients (62 ± 11 years). All patients were responders with significant LV reverse remodelling (LV end-diastolic volume 193.7 ± 81 vs. 243.2 ± 82 mL at baseline, p < 0.002) and increased LV ejection fraction (38 ± 7.9% vs. 27 ± 5.2% at baseline, p < 0.001). Mitral regurgitation decreased in 38 patients (69%). During follow-up (35 ± 18 months), 20 patients (36%) needed reprogramming sensed/paced AV delay or maximum tracking rate (MTR) because of inadequate or lost LV capture at exercise test; personalized programming to achieve up to 100% fusion pacing was used in all patients. One patient developed Mobitz II second degree AV block and triple chamber CRT-P upgrade was performed; defibrillator upgrade was not necessary. Conclusions: LV only pacing CRT-P without RV lead showed a positive outcome in carefully selected patients.
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Ioannou A, Papageorgiou N, Singer D, Missouris CG. Registry report of the prevalence of ECG abnormalities and their relation to patient characteristics in an asymptomatic population. QJM 2018; 111:875-879. [PMID: 30239921 DOI: 10.1093/qjmed/hcy212] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Cardiovascular disease is the leading cause of morbidity and mortality in developed countries. Many patients do not experience symptoms before a first major cardiovascular event. Resting electrocardiogram (ECG) may help identify asymptomatic individuals with a high risk of cardiovascular disease. OBJECTIVE We sought to determine the prevalence of ECG abnormalities in an apparently symptom-free adult population within a prospective registry. METHODS The registry consisted of 4739 consecutive apparently healthy individuals [age 62.8 ± 6.2 (SD) years; 54% female], referred by their General Practitioners between 2009 and 2013. Patient demographics, and clinical data were obtained, alongside blood tests and a resting ECG. RESULTS ECG abnormalities were present in 1509 (31.8%) subjects and were commoner with increasing age (F = 0.161, p = 0.01), systolic (F = 0.134, p = 0.01) and diastolic (F = 0.44, p = 0.01) blood pressure and waist circumference (F = 0.53, p = 0.01). Left ventricular hypertrophy (LVH) was the most common abnormality (n = 281) and was positively associated with systolic (F = 0.12, p = 0.01) and diastolic blood pressure (F = 0.99, p = 0.01) and male gender (X2 = 60.5, p < 0.01). All ECG abnormalities (except for LVH) were associated with an increasing age, while right bundle branch block (F = 0.041, p = 0.01) and atrial fibrillation (n = 29; F = 0.036, p = 0.05) were associated with the presence of diabetes mellitus (n = 211). Only left bundle branch block (n = 50) was associated with angina (F = 0.05, p = 0.01). CONCLUSIONS Unrecognized cardiac abnormalities are common in middle-aged men and women with no overt symptoms. ECG offers the potential to identify these abnormalities and provide earlier intervention and treatment, and possibly improve cardiovascular outcome.
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Affiliation(s)
- A Ioannou
- Department of Cardiology, Royal Free Hospital, London, UK
| | - N Papageorgiou
- Department of Cardiology, St. Bartholomew's Hospital, Barts Health NHS Trust, London, UK
| | - D Singer
- Department of Internal Medicine, Office of Global Health, Yale University School of Medicine, New Haven, Connecticut, USA
| | - C G Missouris
- Department of Cardiology, Wexham Park Hospital, Frimley Health NHS Trust, Slough, UK
- Medical School, University of Cyprus, Nicosia, Cyprus
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43
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Right bundle branch block and cardiovascular morbidity and mortality in healthy patients. Med Clin (Barc) 2018; 151:402-411. [PMID: 30139583 DOI: 10.1016/j.medcli.2018.04.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/15/2018] [Accepted: 04/16/2018] [Indexed: 11/21/2022]
Abstract
The clinical significance of a right bundle branch block (RBBB) in an asymptomatic adult without evidence of cardiovascular disease is controversial. To establish the relationship between the appearance of the RBBB and the increase of cardiovascular morbidity and mortality in healthy patients, we have carried out a literature review of documents available until September 2017 through a systematic search on the Pubmed database, Cochrane library and a manual search of the mentioned literature and related articles. From the 29 articles included in the study sample, eight showed mortality and 16 morbidity outcomes. An increase of risk of death is observed is eight articles and an increase of cardiovascular events is observed in 11 articles. The most recent publications suggest that the appearance of an RBBB in healthy individuals should not be underestimated, thus further studies are needed to analyse the type of follow-up that should be carried out in these patients.
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Jensen JR, Kragholm K, Bødker KW, Mortensen R, Graff C, Pietersen A, Nielsen JB, Polcwiartek C, Tayal B, Torp-Pedersen C, Søgaard P, Hansen SM. Association between T-wave discordance and the development of heart failure in left bundle branch block patients: Results from the Copenhagen ECG study. J Electrocardiol 2018; 52:39-45. [PMID: 30476637 DOI: 10.1016/j.jelectrocard.2018.11.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/26/2018] [Accepted: 11/01/2018] [Indexed: 01/02/2023]
Abstract
BACKGROUND In left bundle branch block (LBBB), discrepancies between depolarization and repolarization of the heart can be assessed by similar direction (concordant) or opposite direction (discordant) of the lateral T-waves compared to the direction of the QRS complex and by the QRS-T angle. We examined the association between discordant T-waves and high QRS-T angles for heart failure development in primary care LBBB patients. METHODS Between 2001 and 2011, we identified 2540 patients from primary care with LBBB without overt heart failure. We examined the development of heart failure in relation to two ECG measures: (1) LBBB as either discordant (two or three monophasic T-waves in the opposite direction of the QRS complex in leads I, V5 or V6) or concordant, and (2) the frontal plane QRS-T angle in quartile groups. RESULTS In total, 244 of 913 patients (26.7%) with discordant LBBB developed heart failure compared to 302 of 1627 patients (16.7%) with concordant LBBB. Multivariable Cox regression comparing discordant with concordant LBBB showed a hazard ratio (HR) of 2.58 (95% Confidence interval [CI] 1.71-3.89) for heart failure development within 30 days of follow-up and a HR of 1.45 (95%CI 1.19-1.77) after 30 days. For QRS-T angle, comparing the highest quartile (160°-180°) with the lowest quartile (0°-110°) we found a HR of 2.25 (95%CI 1.26-4.02) within 30 days and a HR of 1.67 (95%CI 1.25-2.23) after 30 days. CONCLUSION T-wave discordance in lateral ECG leads and a high QRS-T angle are associated with heart failure development in primary care LBBB patients.
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Affiliation(s)
- Johannes Riis Jensen
- Unit of Epidemiology and Biostatistics, Aalborg University Hospital, Aalborg, Denmark.
| | - Kristian Kragholm
- Unit of Epidemiology and Biostatistics, Aalborg University Hospital, Aalborg, Denmark; Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
| | | | - Rikke Mortensen
- Unit of Epidemiology and Biostatistics, Aalborg University Hospital, Aalborg, Denmark
| | - Claus Graff
- Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Adrian Pietersen
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, USA
| | | | - Christoffer Polcwiartek
- Unit of Epidemiology and Biostatistics, Aalborg University Hospital, Aalborg, Denmark; Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
| | - Bhupendar Tayal
- Department of Cardiology, Nephrology and Endocrinology, Nordsjaellands Hospital, Hilleroed, Denmark
| | | | - Peter Søgaard
- Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
| | - Steen Møller Hansen
- Unit of Epidemiology and Biostatistics, Aalborg University Hospital, Aalborg, Denmark
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Fischer Q, Himbert D, Webb JG, Eltchaninoff H, Muñoz-García AJ, Tamburino C, Nombela-Franco L, Nietlispach F, Moris C, Ruel M, Dager AE, Serra V, Cheema AN, Amat-Santos IJ, de Brito FS, Ribeiro H, Abizaid A, Sarmento-Leite R, Dumont E, Barbanti M, Durand E, Alonso Briales JH, Bouleti C, Immè S, Maisano F, del Valle R, Miguel Benitez L, García del Blanco B, Côté M, Philippon F, Urena M, Rodés-Cabau J. Impact of Preexisting Left Bundle Branch Block in Transcatheter Aortic Valve Replacement Recipients. Circ Cardiovasc Interv 2018; 11:e006927. [DOI: 10.1161/circinterventions.118.006927] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Quentin Fischer
- Department of Cardiology, Quebec Heart and Lung Institute, Laval University, Canada (Q.F., E.D., M.C., F.P., J.R.-C.)
| | - Dominique Himbert
- Department of Cardiology, Quebec Heart and Lung Institute, Laval University, Canada (Q.F., E.D., M.C., F.P., J.R.-C.)
- Department of Cardiology, Assistance Publique-Hôpitaux de Paris, Bichat Hospital, France (D.H., C.B., M.U.)
| | - John G. Webb
- Department of Cardiology, St. Paul’s Hospital, Vancouver, British Columbia Canada (J.G.W., M.B
| | - Helene Eltchaninoff
- Department of Cardiology, Hopital Charles Nicolle, University of Rouen, France (H.E., E.D.)
| | - Antonio J. Muñoz-García
- Department of Cardiology, Hospital Universitario Virgen de la Victoria, Universidad de Malaga, Spain (A.J.M.-G., J.H.A.B.)
| | - Corrado Tamburino
- Department of Cardiology, Ferrarotto Hospital, University of Catania, Italy (C.T., M.B., S.I.)
| | - Luis Nombela-Franco
- Instituto Cardiovascular, Hospital Clinico San Carlos, IdISSC, Madrid, Spain (L.N.-F.)
| | - Fabian Nietlispach
- Department of Cardiology, University Heart Center, Transcatheter Valve Clinic, Zurich, Switzerland (F.N., F.M.)
| | - Cesar Moris
- Department of Cardiology, Hospital Universitario Central de Asturias, Oviedo, Spain (C.M., R.d.V.)
| | - Marc Ruel
- Department of Cardiology, Ottawa Heart Institute, University of Ottawa, Ontario, Canada (M.R.)
| | - Antonio E. Dager
- Department of Cardiology, Clinica de Occidente de Cali, Colombia (A.E.D., L.M.B.)
| | - Vicenç Serra
- Department of Cardiology, Hospital Universitari Vall d’Hebron, Barcelona, Spain (V.S., B.G.d.B.)
| | - Asim N. Cheema
- Department of Cardiology, St. Michael’s Hospital, Toronto University, Ontario, Canada (A.N.C.)
| | - Ignacio J. Amat-Santos
- Department of Cardiology, Hospital Clinico Universitario de Valladolid, Spain (I.J.A.-S.)
| | - Fabio Sandoli de Brito
- Department of Cardiology, Hospital Israelita Albert Einstein, Sa.o Paulo, Brazil (F.S.d.B)
| | - Henrique Ribeiro
- Department of Cardiology, Heart Institute-InCor, University of Sa.o Paulo, Brazil (H.R.)
| | - Alexandre Abizaid
- Department of Cardiology, Instituto Dante Pazzanese de Cardiologia, Sa.o Paulo, Brazil (A.A.)
| | - Rogério Sarmento-Leite
- Department of Cardiology, Instituto de Cardiologia do Rio Grande do Sul, Porto Alegre, Brazil (R.S.-L.)
| | - Eric Dumont
- Department of Cardiology, Hopital Charles Nicolle, University of Rouen, France (H.E., E.D.)
| | - Marco Barbanti
- Department of Cardiology, St. Paul’s Hospital, Vancouver, British Columbia Canada (J.G.W., M.B
- Department of Cardiology, Ferrarotto Hospital, University of Catania, Italy (C.T., M.B., S.I.)
| | | | - Juan H. Alonso Briales
- Department of Cardiology, Hospital Universitario Virgen de la Victoria, Universidad de Malaga, Spain (A.J.M.-G., J.H.A.B.)
| | - Claire Bouleti
- Department of Cardiology, Assistance Publique-Hôpitaux de Paris, Bichat Hospital, France (D.H., C.B., M.U.)
| | - Sebastiano Immè
- Department of Cardiology, Ferrarotto Hospital, University of Catania, Italy (C.T., M.B., S.I.)
| | - Francesco Maisano
- Department of Cardiology, University Heart Center, Transcatheter Valve Clinic, Zurich, Switzerland (F.N., F.M.)
| | - Raquel del Valle
- Department of Cardiology, Hospital Universitario Central de Asturias, Oviedo, Spain (C.M., R.d.V.)
| | - Luis Miguel Benitez
- Department of Cardiology, Clinica de Occidente de Cali, Colombia (A.E.D., L.M.B.)
| | - Bruno García del Blanco
- Department of Cardiology, Hospital Universitari Vall d’Hebron, Barcelona, Spain (V.S., B.G.d.B.)
| | - Mélanie Côté
- Department of Cardiology, Quebec Heart and Lung Institute, Laval University, Canada (Q.F., E.D., M.C., F.P., J.R.-C.)
| | - François Philippon
- Department of Cardiology, Quebec Heart and Lung Institute, Laval University, Canada (Q.F., E.D., M.C., F.P., J.R.-C.)
| | - Marina Urena
- Department of Cardiology, Assistance Publique-Hôpitaux de Paris, Bichat Hospital, France (D.H., C.B., M.U.)
| | - Josep Rodés-Cabau
- Department of Cardiology, Quebec Heart and Lung Institute, Laval University, Canada (Q.F., E.D., M.C., F.P., J.R.-C.)
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Rivero D, Alhamaydeh M, Faramand Z, Alrawashdeh M, Martin-Gill C, Callaway C, Drew B, Al-Zaiti S. Nonspecific electrocardiographic abnormalities are associated with increased length of stay and adverse cardiac outcomes in prehospital chest pain. Heart Lung 2018; 48:121-125. [PMID: 30309629 DOI: 10.1016/j.hrtlng.2018.09.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 09/06/2018] [Accepted: 09/07/2018] [Indexed: 11/17/2022]
Abstract
BACKGROUND Nonspecific ST-T repolarization (NST) abnormalities alter the ST-segment for reasons often unrelated to acute myocardial ischemia, which could contribute to misdiagnosis or inappropriate treatment. We sought to define the prevalence of NST patterns in patients with chest pain and evaluate how such patterns correlate with the eventual etiology of chest pain and course of hospitalization. METHODS This was a prospective observational study that included consecutive prehospital chest pain patients from three tertiary care hospitals in the U.S. Two independent reviewers blinded from clinical data audited the prehospital 12-lead ECG for the presence or absence of NST patterns (i.e., right or left bundle branch block, left ventricular hypertrophy with strain pattern, ventricular pacing, ventricular rhythm, or coarse atrial fibrillation). The primary outcome was 30-day major adverse cardiac events (MACE) defined as cardiac arrest, acute heart failure, post-discharge infarction, or all-cause death. RESULTS The final sample included 750 patients (age 59 ± 17, 58% males). A total of 40 patients (5.3%) experienced 30-MACE and 131 (17.5%) had NST patterns. The presence of NST patterns was an independent multivariate predictor of 30-day MACE (9.9% vs. 4.4%, OR = 2.2 [95% CI = 1.1-4.5]. Patients with NST patterns had increased median length of stay (1.0 [IQR 0.5-3] vs. 2.0 [IQR 1-4] days, p < 0.05) independent of the etiology of chest pain. CONCLUSIONS One in six prehospital ECGs of patients with chest pain has NST patterns. This pattern is associated with increased length of stay and adverse cardiac outcomes, suggesting the need of preventive measures and close follow up in such patients.
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Affiliation(s)
- Diana Rivero
- Thomas Jefferson University Hospital, Philadelphia PA, United States
| | | | - Ziad Faramand
- University of Pittsburgh Medical Center (UPMC), Pittsburgh PA, United States; University of Pittsburgh, 3500 Victoria Street, Pittsburgh PA 15261, United States
| | - Mohammad Alrawashdeh
- University of Pittsburgh, 3500 Victoria Street, Pittsburgh PA 15261, United States; Harvard Medical School and Harvard Pilgrim Healthcare Institute, Boston, MA
| | - Christian Martin-Gill
- University of Pittsburgh Medical Center (UPMC), Pittsburgh PA, United States; University of Pittsburgh, 3500 Victoria Street, Pittsburgh PA 15261, United States
| | - Clifton Callaway
- University of Pittsburgh Medical Center (UPMC), Pittsburgh PA, United States; University of Pittsburgh, 3500 Victoria Street, Pittsburgh PA 15261, United States
| | - Barbara Drew
- University of California San Francisco (UCSF), San Francisco, CA, United States
| | - Salah Al-Zaiti
- University of Pittsburgh, 3500 Victoria Street, Pittsburgh PA 15261, United States.
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Soares T, Irigoyen MC, Goldmeier S. The cardiac profile and electrocardiographic standard of at-height workers. ACTA ACUST UNITED AC 2018; 64:448-453. [PMID: 30304145 DOI: 10.1590/1806-9282.64.05.448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 09/09/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND The Medical Control Program for Occupational Health establishes the required supplementary exams, according to the activity exercised by the worker and its inherent risks. The Regulatory Norm No. 35, recently deployed, stipulates that at-height workers must undergo electrocardiogram exams as an additional routine examination. OBJECTIVE To evaluate the electrocardiographic standard in at-height. METHODOLOGY A cross-sectional study, developed from May 2014 to January 2015 with male at-height workers. Anthropometric and clinical data were collected after the electrocardiogram (ECG). The workers included in the program were evaluated by an occupational medicine service of Serra Gaúcha, responsible for medical assessment and occupational tests. All workers were assessed by the researcher. RESULTS A total of 561 at-height workers participated in the study. The average age was 35.9 ± 12.2 years. A total of 176 (31%) presented electrocardiographic changes in the analysis of the resting ECG. Regarding the amendments in the resting ECG, 15.7% were attributed to changes in ventricular repolarization, 8% as blocks conductions, and 5.8% as left ventricular overload. Demographic variables were not associated with changes in the electrocardiographic tracing. CONCLUSION This study demonstrated the electrocardiographic alterations and the profile of at-height workers. These findings can help determine prevention strategies and provide warnings of possible future harms to the health of these workers.
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Affiliation(s)
- Tatiana Soares
- Nurse. Student of the Postgraduate Program in Cardiology and Health Sciences (IC-FUC). Porto Alegre/RS/Brasil
| | - Maria Claudia Irigoyen
- Doctor at the Hypertension Unit (InCor), Medical School of the University of São Paulo, São Paulo, Brazil
| | - Sílvia Goldmeier
- Nurse Doctor in Cardiology and Health Sciences (IC-FUC). Teacher at the Postgraduate Program in Research Processes and Health Innovations. Porto Alegre /RS/Brasil
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Akhtari S, Chuang ML, Salton CJ, Berg S, Kissinger KV, Goddu B, O’Donnell CJ, Manning WJ. Effect of isolated left bundle-branch block on biventricular volumes and ejection fraction: a cardiovascular magnetic resonance assessment. J Cardiovasc Magn Reson 2018; 20:66. [PMID: 30231875 PMCID: PMC6146610 DOI: 10.1186/s12968-018-0457-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 05/08/2018] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Left bundle branch block (LBBB) is associated with abnormal left ventricular (LV) contraction, and is frequently associated with co-morbid cardiovascular disease, but the effect of an isolated (i.e. in the absence of cardiovascular dissease) LBBB on biventricular volumes and ejection fraction (EF) is not well characterized. The objective of this study was to compare LV and right ventricular (RV) volumes and EF in adults with an isolated LBBB to matched healthy controls and to population-derived normative values, using cardiovascular magnetic resonance (CMR) imaging. METHODS We reviewed our clinical echocardiography database and the Framingham Heart Study Offspring cohort CMR database to identify adults with an isolated LBBB. Age-, sex-, hypertension-status, and body-surface area (BSA)-matched controls were identified from the Offspring cohort. All study subjects were scanned using the same CMR hardware and imaging sequence. Isolated-LBBB cases were compared with matched controls using Wilcoxon paired signed-rank test, and to normative reference values via Z-score. RESULTS Isolated-LBBB subjects (n = 18, 10F) ranged in age from 37 to 82 years. An isolated LBBB was associated with larger LV end-diastolic and end-systolic volumes (both p < 0.01) and lower LVEF (56+/- 7% vs. 68+/- 6%; p <0.001) with similar myocardial contraction fraction. LVEF in isolated LBBB was nearly two standard deviations (Z = - 1.95) below mean sex and age-matched group values. LV stroke volume, cardiac output, and mass, and all RV parameters were similar (p = NS) between the groups. CONCLUSIONS Adults with an isolated LBBB have greater LV volumes and markedly reduced LVEF, despite the absence of overt cardiovascular disease. These data may be useful toward the clinical interpretation of imaging studies performed on patients with an isolated LBBB.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Bundle-Branch Block/complications
- Bundle-Branch Block/diagnostic imaging
- Bundle-Branch Block/physiopathology
- Case-Control Studies
- Databases, Factual
- Female
- Humans
- Hypertrophy, Left Ventricular/diagnostic imaging
- Hypertrophy, Left Ventricular/etiology
- Hypertrophy, Left Ventricular/physiopathology
- Magnetic Resonance Imaging
- Male
- Middle Aged
- Myocardial Contraction
- Predictive Value of Tests
- Stroke Volume
- Ventricular Dysfunction, Left/diagnostic imaging
- Ventricular Dysfunction, Left/etiology
- Ventricular Dysfunction, Left/physiopathology
- Ventricular Function, Left
- Ventricular Function, Right
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Affiliation(s)
- Shadi Akhtari
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215 USA
| | - Michael L. Chuang
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215 USA
- The NHLBI’s Framingham Heart Study, Framingham, MA USA
| | - Carol J. Salton
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215 USA
| | - Sophie Berg
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215 USA
| | - Kraig V. Kissinger
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215 USA
| | - Beth Goddu
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215 USA
| | - Christopher J. O’Donnell
- The NHLBI’s Framingham Heart Study, Framingham, MA USA
- Cardiology Section, Veterans Affairs Healthcare System, Boston, MA USA
| | - Warren J. Manning
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215 USA
- Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA USA
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Calò L, Martino A, Goanta E, Okumura Y, de Ruvo E. Right bundle branch block and conduction disturbances in Brugada syndrome and arrhythmogenic right ventricular cardiomyopathy. J Interv Card Electrophysiol 2018; 52:307-313. [DOI: 10.1007/s10840-018-0386-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Accepted: 05/16/2018] [Indexed: 10/16/2022]
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50
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Prognostic Significance and Clinical Utility of Intraventricular Conduction Delays on the Preoperative Electrocardiogram. Am J Cardiol 2018; 121:997-1003. [PMID: 29499923 DOI: 10.1016/j.amjcard.2018.01.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 12/24/2017] [Accepted: 01/08/2018] [Indexed: 11/24/2022]
Abstract
The prognostic significance of the preoperative electrocardiogram (ECG), particularly intraventricular conduction delays (IVCDs), on postoperative outcomes among patients undergoing noncardiac surgery is uncertain. In a retrospective cohort, we evaluated the risk associated with preoperative IVCDs on in-hospital death and postoperative myocardial infarction (POMI). The 152,479 patients who underwent noncardiac surgery were categorized by preoperative electrocardiographic findings: normal (36.1%), left bundle branch block (LBBB, 1.2%), right bundle branch block (2.9%), nonspecific IVCD (3.3%), and any other ECG abnormality (56.5%). The primary and secondary outcomes were postoperative in-hospital mortality and POMI, respectively. In multivariable-adjusted models, compared with normal ECGs, each electrocardiographic abnormality category was associated with increased risk of postoperative death: LBBB odds ratio (OR) 1.89 (95% confidence interval [CI] 1.35 to 2.65), right bundle branch block OR 1.73 (95% CI 1.33 to 2.24), nonspecific IVCD OR 1.95 (95% CI 1.53 to 2.48), and other abnormal ECG OR 1.94 (95% CI 1.68 to 2.25). ECGs with conduction delays did not confer increased risk of postoperative death compared with other ECG abnormalities. Moreover, receiver operating characteristic analysis of models incorporating demographic and co-morbidity data demonstrated marginal additive benefit of any electrocardiographic data. Risk of POMI was not significantly increased among ECGs with conduction delays compared with both normal and other abnormal ECGs. In conclusion, patients with intraventricular conduction disease, including LBBB, on preoperative ECG are not at greater risk of postoperative in-hospital death or POMI compared with patients with other ECG abnormalities. Furthermore, any preoperative electrocardiographic abnormalities, including intraventricular delays, provide marginal clinical utility beyond demographic and clinical history for predicting postoperative in-hospital death or POMI.
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