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Lancini D, Samuel M, Smith C, Wells G, Tang A, Parkash R. Delta QRS and outcomes post CRT in the Resynchronization-Defibrillation for Ambulatory Heart Failure Trial. Heart Rhythm 2024:S1547-5271(24)03426-X. [PMID: 39393749 DOI: 10.1016/j.hrthm.2024.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2024] [Revised: 09/30/2024] [Accepted: 10/04/2024] [Indexed: 10/13/2024]
Abstract
BACKGROUND Amongst patients with left ventricular systolic dysfunction and prolonged QRS duration, cardiac resynchronization therapy (CRT) can improve cardiac electromechanical synchrony, and prevent adverse clinical outcomes. OBJECTIVES To investigate the role of delta QRS duration (ΔQRSd) in predicting clinical response to CRT. METHODS The RAFT (Resynchronization-Defibrillation for Ambulatory Heart Failure Trial) study randomized 1798 patients to CRT with defibrillator or implantable cardioverter-defibrillator (ICD) alone. Those who received CRT and had electrocardiograms available at baseline and post CRT implantation were included in this analysis. ΔQRSd was calculated as the absolute difference between QRS duration at baseline and with CRT pacing. The primary outcome was the composite of death and heart failure hospitalization. RESULTS There were 813 patients included in this analysis. The median age was 67 years, and 125 patients (15.2%) were female. The median ΔQRSd was -2 ms (-20 to 18ms), and 447 (55%) of patients had a ΔQRSd ≤ 0 post implant. ΔQRSd was an independent predictor of the composite outcome amongst patients with CRT (HR = 1.012, 95% CI 1.008-1.017). CRT recipients with ΔQRSd > 0 had higher rates of the composite outcome than patients randomized to ICD alone. CONCLUSION Amongst patients receiving CRT for heart failure with left ventricular systolic dysfunction and QRS prolongation, ΔQRSd was an independent predictor of long-term mortality and heart failure hospitalization.
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Affiliation(s)
- Daniel Lancini
- Heart Rhythm Service, QEII Health Sciences Centre, Nova Scotia
| | | | - Corey Smith
- Heart Rhythm Service, QEII Health Sciences Centre, Nova Scotia
| | - George Wells
- University of Ottawa Heart Institute, Ottawa, Ontario
| | | | - Ratika Parkash
- Heart Rhythm Service, QEII Health Sciences Centre, Nova Scotia.
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Lopez J, Duarte G, Mark JD, Vergara Sanchez C, De Camps Martinez ER, Black AL, Perez A, Zachariah A, Elshazly M, Colombo RA, Losiniecki F, Chait R, Jimenez M, Baez-Escudero J. Impact of cardiac conduction disease in patients with cardiac amyloidosis: A national retrospective cohort study. Int J Cardiol 2024; 417:132468. [PMID: 39242034 DOI: 10.1016/j.ijcard.2024.132468] [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] [Received: 05/07/2024] [Revised: 08/04/2024] [Accepted: 08/16/2024] [Indexed: 09/09/2024]
Abstract
BACKGROUND There is a paucity of data regarding the impact of cardiac conduction disease (CD) on clinical outcomes in patients with cardiac amyloidosis (CA). METHODS The National Inpatient Sample (NIS) was queried to identify all CA admissions and those with CD using ICD-10 codes from 2016 to 2019. We explored baseline characteristics and used multivariate logistic regression to assess the association between CD and several clinical outcomes during index admission; a p-value of <0.05 was significant. Propensity score matching (PSM) was performed to validate our results. RESULTS A total of 12,185 patients with CA were identified. Of these, 920 (7.6 %) had CD. The median age of the sample was 72 years (IQR: 64-80). After multivariate adjustment and PSM, the presence of CD in CA was associated with higher odds of ventricular arrhythmias (VA) (aOR = 2.97, 95 % CI 1.78-4.96, p < 0.001), syncope (aOR = 3.44, 95 % CI 1.51-7.83, p = 0.003), and cardiovascular implantable electronic device (CIED) implantation (aOR = 12.86, 95 % CI 5.50-30.04, p < 0.001) but not with sudden cardiac arrest (p = 0.092), acute heart failure (p = 0.060), all-cause in-hospital mortality (p = 0.384), and non-routine discharge in patients admitted for CA (p = 0.271). CONCLUSIONS Although CD was not associated with all-cause in-hospital mortality, there was a significant association with VAs and syncope. Syncope is associated with worse survival in patients with CA. Further studies that prospectively follow patients are needed to determine the true effect of cardiac CD on mortality in patients with CA.
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Affiliation(s)
- Jose Lopez
- Division of Cardiovascular Disease, University of Miami Miller School of Medicine, JFK Medical Center, Atlantis, FL, United States
| | - Gustavo Duarte
- Division of Cardiology, Cleveland Clinic's Heart, Vascular & Thoracic Institute (HVTI), Cleveland Clinic Florida, Weston, FL, United States.
| | - Justin D Mark
- Department of Internal Medicine, University of Miami Miller School of Medicine, Holy Cross Health, Fort Lauderdale, FL, United States
| | - Carlos Vergara Sanchez
- Division of Cardiovascular Medicine, Mayo Clinic Florida, Jacksonville, FL, United States
| | | | - Ann Lowery Black
- Department of Internal Medicine, HCA Florida Kendall Hospital, Miami, FL, United States
| | - Arturo Perez
- Section of Clinical Cardiac Electrophysiology, University of Miami Miller School of Medicine, JFK Medical Center, Atlantis, FL, United States
| | - Ashvin Zachariah
- Division of Cardiovascular Disease, University of Miami Miller School of Medicine, JFK Medical Center, Atlantis, FL, United States
| | - Mohamed Elshazly
- Section of Clinical Cardiac Electrophysiology, Orlando Health Heart and Vascular Institute, Orlando, FL, United States
| | - Rosario A Colombo
- Division of Cardiovascular Disease, University of Miami Miller School of Medicine, Jackson Health System, Miami, FL, United States
| | - Fergie Losiniecki
- Section of Clinical Cardiac Electrophysiology, Medical University of South Carolina, Charleston, SC, United States
| | - Robert Chait
- Division of Cardiovascular Disease, University of Miami Miller School of Medicine, JFK Medical Center, Atlantis, FL, United States
| | - Marcello Jimenez
- Division of Cardiovascular Disease, University of Miami Miller School of Medicine, JFK Medical Center, Atlantis, FL, United States; Section of Clinical Cardiac Electrophysiology, University of Miami Miller School of Medicine, JFK Medical Center, Atlantis, FL, United States
| | - Jose Baez-Escudero
- Division of Cardiology, Cleveland Clinic's Heart, Vascular & Thoracic Institute (HVTI), Cleveland Clinic Florida, Weston, FL, United States
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Bergfeldt L, Hellsing R, Molnar D, Taha A, Lundahl G, Gransberg L, Bergström G. Abnormal QRS-T angles in 5796 women and men aged 50-64: an electrocardiographic analysis providing mechanistic insights. J Electrocardiol 2024; 86:153784. [PMID: 39190971 DOI: 10.1016/j.jelectrocard.2024.153784] [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: 04/03/2024] [Revised: 06/12/2024] [Accepted: 08/14/2024] [Indexed: 08/29/2024]
Abstract
INTRODUCTION Abnormal QRS-T angles are prognostic markers for cardiovascular deaths including sudden cardiac death. They occur in ∼5-6% of population-based cohorts but in ∼20% of patients with diabetes. The mechanistic background, electrical activation and/or recovery disturbances, is not known and the topic of this study. METHODS Applying Frank vectorcardiography (VCG) and simultaneously recorded scalar 12‑lead ECG, electrical activation and recovery of abnormal QRS-T angles were studied in 311 participants (5.4%) from a population-based cohort of 5796 women and men in the main Swedish CArdio-Pulmonary bio-Imaging Study (SCAPIS) in Gothenburg. Cut-off values for the peak and mean QRS-T angles were > 124° and > 119°, based on the >95th percentile among all 1080 participants in the pilot SCAPIS and reference values for normal directions (Q1-Q3) from 319 apparently healthy (30%) of them. RESULTS Of 311 cases 17% had known cardiac disease. Deviations of QRS and QRSarea-vectors from reference limits (90%) were significantly more common than deviations of T- and Tarea-vectors (65%). Standard ECG signs suggested pathophysiology in 20%; left bundle branch block (LBBB) and voltage criteria for left ventricular hypertrophy being most frequent (9-10%) each. Sub-group analysis of the 30 with LBBB showed very large variability in vector directions. CONCLUSIONS Our observations provide mechanistic insights about abnormal QRS-T angles of potential value for future prognostic and interventional studies. The results also have potential implications for LBB area pacing and the approach to left ventricular hypertrophy.
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Affiliation(s)
- Lennart Bergfeldt
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Sweden; Region Västra Götaland, Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden.
| | - Rut Hellsing
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Sweden; Region Västra Götaland, Department of Clinical Physiology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - David Molnar
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Sweden; Region Västra Götaland, Department of Radiology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Amar Taha
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Sweden; Region Västra Götaland, Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Gunilla Lundahl
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Sweden
| | - Lennart Gransberg
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Sweden
| | - Göran Bergström
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Sweden; Region Västra Götaland, Department of Clinical Physiology, Sahlgrenska University Hospital, Gothenburg, Sweden
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Handa K, Kawamura M, Yoshioka D, Saito S, Kawamura T, Kawamura A, Misumi Y, Taira M, Shimamura K, Komukai S, Kitamura T, Miyagawa S. Impact of the Aortomitral Positional Anatomy on Atrioventricular Conduction Disorder Following Mitral Valve Surgery. J Am Heart Assoc 2024; 13:e035826. [PMID: 39158546 DOI: 10.1161/jaha.124.035826] [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: 03/31/2024] [Accepted: 07/26/2024] [Indexed: 08/20/2024]
Abstract
BACKGROUND Variations in the aortomitral positional anatomy, including aortic root rotation appear to be related to variations in the location of the conduction system, including the bundle of His. However, little is known about their clinical significance. METHODS AND RESULTS This study included 147 patients with normal ECGs who underwent mitral valve surgery. The aortomitral anatomy was classified using preoperative 3-dimensional transesophageal echocardiography, and postoperative conduction disorders, including atrioventricular block and bundle branch block, were analyzed. Variations classified as aortomitral appearance were designated as having a center appearance (85.7%, n=126/147) or lateral appearance (14.3%, n=21/147) on the basis of whether the aortic root was located at the center or was shifted to the left fibrous trigone side. Subsequently, those with a center appearance, aortic root rotation was classified as having a center rotation (83.3% [n=105/126]), in which the commissure of the left and noncoronary aortic leaflet was located at the center, lateral rotation (14.3% [n=18/126]), rotated to the left trigone side, or medial rotation (2.4% [n=3/126]), rotated to the right. The incidence of 3-month persistent new-onset conduction disorder was higher in the lateral appearance than the center appearance group (21.1% versus 5.0%; P=0.031) and higher in the lateral rotation than in the center or medial rotation groups (29.4% versus 1.0% versus 0.0%, respectively; P<0.001). CONCLUSIONS Aortomitral variations can be classified using 3-dimensional transesophageal echocardiography. Lateral appearance and lateral rotation are risk factors for conduction disorders in mitral valve surgery.
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Affiliation(s)
- Kazuma Handa
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Masashi Kawamura
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Daisuke Yoshioka
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Shunsuke Saito
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Takuji Kawamura
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Ai Kawamura
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Yusuke Misumi
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Masaki Taira
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Kazuo Shimamura
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
| | - Sho Komukai
- Department of Integrated Medicine, Institute of Biomedical Statistics, Osaka University Graduate School of Medicine Osaka Japan
| | - Tetsuhisa Kitamura
- Department of Social and Environmental Medicine Osaka University Graduate School of Medicine Osaka Japan
| | - Shigeru Miyagawa
- Department of Cardiovascular Surgery Osaka University Graduate School of Medicine Osaka Japan
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König S, Hilbert S, Bode K. Conduction System Pacing: Hope, Challenges, and the Journey Forward. Curr Cardiol Rep 2024; 26:801-814. [PMID: 38976199 DOI: 10.1007/s11886-024-02085-8] [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] [Accepted: 06/17/2024] [Indexed: 07/09/2024]
Abstract
PURPOSE OF THE REVIEW Cardiac pacing has evolved in recent years currently culminating in the specific stimulation of the cardiac conduction system (conduction system pacing, CSP). This review aims to provide a comprehensive overview of the available literature on CSP, focusing on a critical classification of studies comparing CSP with standard treatment in the two fields of pacing for bradycardia and cardiac resynchronization therapy in patients with heart failure. The article will also elaborate specific benefits and limitations associated with CSP modalities of His bundle pacing (HBP) and left bundle branch area pacing (LBBAP). RECENT FINDINGS Based on a growing number of observational studies for different indications of pacing therapy, both CSP modalities investigated are advantageous over standard treatment in terms of narrowing the paced QRS complex and preserving or improving left ventricular systolic function. Less consistent evidence exists with regard to the improvement of heart failure-related rehospitalization rates or mortality, and effect sizes vary between HBP and LBBAP. LBBAP is superior over HBP in terms of lead measurements and procedural duration. With regard to all reported outcomes, evidence from large scale randomized controlled clinical trials (RCT) is still scarce. CSP has the potential to sustainably improve patient care in cardiac pacing therapy if patients are appropriately selected and limitations are considered. With this review, we offer not only a summary of existing data, but also an outlook on probable future developments in the field, as well as a detailed summary of upcoming RCTs that provide insights into how the journey of CSP continues.
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Affiliation(s)
- S König
- Department of Electrophysiology, Heart Center Leipzig at University of Leipzig, Leipzig, Germany.
- Helios Health Institute, Real World Evidence and Health Technology Assessment, Berlin, Germany.
| | - S Hilbert
- Department of Electrophysiology, Heart Center Leipzig at University of Leipzig, Leipzig, Germany
| | - K Bode
- Department of Electrophysiology, Heart Center Leipzig at University of Leipzig, Leipzig, Germany
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Marques CA, Cabrita A, Pinho AI, Santos L, Oliveira C, Rodrigues RA, Cruz C, Martins E. Left bundle branch block cardiomyopathy (LBBB-CMP): from the not-so-benign finding of idiopathic LBBB to LBBB-CMP diagnosis and treatment. Heart Vessels 2024:10.1007/s00380-024-02441-2. [PMID: 39039344 DOI: 10.1007/s00380-024-02441-2] [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] [Received: 03/22/2024] [Accepted: 07/10/2024] [Indexed: 07/24/2024]
Abstract
Introduction Idiopathic left bundle branch block (iLBBB) is an uncommon finding. Its benignity has been increasingly questioned, though its natural history remains poorly clarified. Similarly, LBBB-cardiomyopathy (LBBB-CM) has been also increasingly recognized as a distinct entity, where electromechanical dyssynchrony seems to play a central role in left ventricular dysfunction (LVD) development. Still, it remains a scarcely studied topic. There is an urgent need for investigation and evidence reinforcement in these areas. OBJECTIVES two main objectives: (1) to explore the natural history of "asymptomatic" iLBBB carriers; (2) to characterize the outcomes and therapeutic approach used in a "real-world" cohort of possible LBBB-CMP patients (pts). METHODS tertiary care centre retrospective study of pts with iLBBB and possible LBBB-CMP, screened from a large hospital electrocardiographic database from 2011 to 2017 (LBBB = 347). To assign the 1st objective, only pts with left ventricular ejection fraction (LVEF) ≥ 50% and available follow-up (FU) data were included (n = 152). Regarding the 2nd objective, possible LBBB-CMP pts were selected and defined as iLBBB pts with LVD (LVEF < 50%) and no secondary causes for LVD (n = 53). Data were based on pts' careful review of medical records. RESULTS focusing our 1st objective, 152 iLBBB carriers were identified. Median FU time were 8 years, and 61% were female. During FU, approximately 25% developed LVD, 20% needed ≥ 1 cardiovascular (CV) hospitalization, and 15% needed a cardiac device implantation. The majority (2/3) of pts with LVD on FU (n = 35) had no secondary causes for LVD, being classified as possible LBBB-CMP pts. Time-to-LVD analysis showed no differences between pts with a known cause for LVD vs LBBB-CMP pts (Log-rank = 0.713). Concerning the 2nd objective, 53 possible LBBB-CMP pts were identified. Median FU time were 10 years, and 51% were female. During the FU, 77% presented heart failure (HF) symptoms, and 42% needed ≥ 1 CV hospitalization, mainly due to HF. Half presented severe LVD at some point in time, and 55% needed a cardiac device, most of them a cardiac resynchronization therapy (CRT) device. Comparing CRT with non-CRT pts, no differences were found in terms of medical therapy, but better outcomes were observed in CRT group: LVEF improvement was higher (median LVEF improvement of 11% in non-CRT vs 27% in CRT; p < 0.001), and fully recovery from LVD was more frequent (50% of CRT vs 14% non-CRT; p = 0.028). CONCLUSION our data strengthen current evidence on natural history of iLBBB, showing significant CV morbidity associated with the presence of iLBBB, and reinforces the need for a serial and proper FU of these carriers. Our data on "real-world" possible LBBB-CMP pts shows high rates of CV events, namely HF-related events, and supports the growing evidence pointing out CRT as this subgroup of pts' cornerstone of treatment. In conclusion, our work sheds additional light on these largely unknown topics and underlines the urgent need for larger and prospective studies addressing the identification of LVD development predictors in iLBBB carriers, as well as the establishment of diagnostic criteria and therapeutic approach for LBBB-CMP.
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Affiliation(s)
- Catarina Amaral Marques
- Department of Cardiology, São João Hospital Centre, Centro Hospitalar Universitário São João Porto, 4200-319, Porto, Portugal.
| | - André Cabrita
- Department of Cardiology, São João Hospital Centre, Centro Hospitalar Universitário São João Porto, 4200-319, Porto, Portugal
| | - Ana Isabel Pinho
- Department of Cardiology, São João Hospital Centre, Centro Hospitalar Universitário São João Porto, 4200-319, Porto, Portugal
| | - Luís Santos
- Department of Cardiology, São João Hospital Centre, Centro Hospitalar Universitário São João Porto, 4200-319, Porto, Portugal
| | - Cátia Oliveira
- Department of Cardiology, São João Hospital Centre, Centro Hospitalar Universitário São João Porto, 4200-319, Porto, Portugal
| | - Rui André Rodrigues
- Department of Cardiology, São João Hospital Centre, Centro Hospitalar Universitário São João Porto, 4200-319, Porto, Portugal
| | - Cristina Cruz
- Department of Cardiology, São João Hospital Centre, Centro Hospitalar Universitário São João Porto, 4200-319, Porto, Portugal
| | - Elisabete Martins
- Department of Cardiology, São João Hospital Centre, Centro Hospitalar Universitário São João Porto, 4200-319, Porto, Portugal
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Desai D, Maheta DK, Agrawal SP, Abouarab AG, Frishman WH, Aronow WS. Understanding Arrhythmia-Induced Cardiomyopathy: Symptoms and Treatments. Cardiol Rev 2024:00045415-990000000-00302. [PMID: 39023247 DOI: 10.1097/crd.0000000000000755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
Arrhythmia-induced cardiomyopathy is a complex condition that causes a decline in heart function as a result of irregular heart rhythms. This disorder highlights the link between irregular heart rhythm and heart failure, necessitating prompt identification and intervention. It often occurs due to ongoing fast heart rhythms like atrial fibrillation or tachycardia. Understanding the mechanisms, symptoms, and available treatments is essential for enhancing patient outcomes given the complicated nature of the condition. This article delves into various aspects of arrhythmia-induced cardiomyopathy, including pathogenesis, clinical presentation, diagnostic methods, epidemiology, typical arrhythmias associated with the condition, and management options. It assesses patients' future outlook and necessary follow-up, aiming to provide healthcare providers with a comprehensive understanding of how to handle this intricate condition. The article emphasizes the important effect an integrative approach can have on both patients' lives and the clinical consequences of diagnosing and treating this condition. This extensive understanding enhances the resources at the disposal of physicians, enabling targeted treatments that enhance cardiomyopathy by targeting arrhythmia regulation. More research and development are needed in the field of cardiomyopathy and arrhythmia relationship. The presentation urges the medical field to delve deeper into the complexities of illness by emphasizing the need for continuous research and a multifaceted treatment plan. By combining these understandings, our goal is to enhance patient outcomes and create opportunities for further studies on cardiovascular wellness.
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Affiliation(s)
- Dev Desai
- From the Department of Medicine, Smt. NHL Municipal Medical College, Ahmedabad, India
| | | | - Siddharth Pravin Agrawal
- Department of Internal Medicine, New York Medical College/Landmark Medical Center, Woonsocket, RI
| | | | | | - Wilbert S Aronow
- Departments of Cardiology and Medicine, Westchester Medical Center, New York Medical College, Valhalla, NY
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Haimovich JS, Di Achille P, Nauffal V, Singh P, Reeder C, Wang X, Sarma G, Kornej J, Benjamin EJ, Philippakis A, Batra P, Ellinor PT, Lubitz SA, Khurshid S. Frequency of Electrocardiogram-Defined Cardiac Conduction Disorders in a Multi-Institutional Primary Care Cohort. JACC. ADVANCES 2024; 3:101004. [PMID: 39130046 PMCID: PMC11312782 DOI: 10.1016/j.jacadv.2024.101004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 02/23/2024] [Indexed: 08/13/2024]
Abstract
Background Disorders affecting cardiac conduction are associated with substantial morbidity. Understanding the epidemiology and risk factors for conduction disorders may enable earlier diagnosis and preventive efforts. Objectives The purpose of this study was to quantify contemporary frequency and risk factors for electrocardiogram (ECG)-defined cardiac conduction disorders in a large multi-institutional primary care sample. Methods We quantified prevalence and incidence of conduction disorders among adults receiving longitudinal primary care between 2001 and 2019, each with at least one 12-lead ECG performed prior to the start of follow-up and at least one ECG during follow-up. We defined conduction disorders using curated terms extracted from ECG diagnostic statements by cardiologists. We grouped conduction disorders by inferred anatomic location of abnormal conduction. We tested associations between clinical factors and incident conduction disease using multivariable proportional hazards regression. Results We analyzed 189,163 individuals (median age 55 years; 58% female). The overall prevalence of conduction disorders was 27% among men and 15% among women. Among 119,926 individuals (median age 55 years; 51% female), 6,802 developed an incident conduction system abnormality over a median of 10 years (Q1, Q3: 6, 15 years) of follow-up. Incident conduction disorders were more common in men (8.78 events/1,000 person-years) vs women (4.34 events/1,000 person-years, P < 0.05). In multivariable models, clinical factors including older age (HR: 1.25 per 5-year increase [95% CI: 1.24-1.26]) and myocardial infarction (HR: 1.39 [95% CI: 1.26-1.54]) were associated with incident conduction disorders. Conclusions Cardiac conduction disorders are common in a primary care population, especially among older individuals with cardiovascular risk factors.
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Affiliation(s)
- Julian S. Haimovich
- Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, Massachusetts, USA
- Cardiovascular Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Paolo Di Achille
- Data Sciences Platform, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Victor Nauffal
- Cardiovascular Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Cardiology Division, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Pulkit Singh
- Data Sciences Platform, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Christopher Reeder
- Data Sciences Platform, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Xin Wang
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, Massachusetts, USA
- Cardiovascular Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Gopal Sarma
- Data Sciences Platform, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Jelena Kornej
- Division of Cardiovascular Medicine, Department of Medicine, Boston Medical Center, Boston University Chobanian and Avedisian School of Medicine, Boston, Massachusetts, USA
| | - Emelia J. Benjamin
- Division of Cardiovascular Medicine, Department of Medicine, Boston Medical Center, Boston University Chobanian and Avedisian School of Medicine, Boston, Massachusetts, USA
- Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts, USA
| | - Anthony Philippakis
- Data Sciences Platform, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Eric and Wendy Schmidt Center, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Puneet Batra
- Data Sciences Platform, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Patrick T. Ellinor
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, Massachusetts, USA
- Cardiovascular Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Demoulas Center for Cardiac Arrhythmias, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Steven A. Lubitz
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, Massachusetts, USA
- Cardiovascular Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Demoulas Center for Cardiac Arrhythmias, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Shaan Khurshid
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, Massachusetts, USA
- Cardiovascular Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Demoulas Center for Cardiac Arrhythmias, Massachusetts General Hospital, Boston, Massachusetts, USA
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Li T, Marashly Q, Kim JA, Li N, Chelu MG. Cardiac conduction diseases: understanding the molecular mechanisms to uncover targets for future treatments. Expert Opin Ther Targets 2024; 28:385-400. [PMID: 38700451 PMCID: PMC11395937 DOI: 10.1080/14728222.2024.2351501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 05/01/2024] [Indexed: 05/05/2024]
Abstract
INTRODUCTION The cardiac conduction system (CCS) is crucial for maintaining adequate cardiac frequency at rest and modulation during exercise. Furthermore, the atrioventricular node and His-Purkinje system are essential for maintaining atrioventricular and interventricular synchrony and consequently maintaining an adequate cardiac output. AREAS COVERED In this review article, we examine the anatomy, physiology, and pathophysiology of the CCS. We then discuss in detail the most common genetic mutations and the molecular mechanisms of cardiac conduction disease (CCD) and provide our perspectives on future research and therapeutic opportunities in this field. EXPERT OPINION Significant advancement has been made in understanding the molecular mechanisms of CCD, including the recognition of the heterogeneous signaling at the subcellular levels of sinoatrial node, the involvement of inflammatory and autoimmune mechanisms, and the potential impact of epigenetic regulations on CCD. However, the current treatment of CCD manifested as bradycardia still relies primarily on cardiovascular implantable electronic devices (CIEDs). On the other hand, an If specific inhibitor was developed to treat inappropriate sinus tachycardia and sinus tachycardia in heart failure patients with reduced ejection fraction. More work is needed to translate current knowledge into pharmacologic or genetic interventions for the management of CCDs.
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Affiliation(s)
- Tingting Li
- Department of Medicine (Section of Cardiovascular Research), Baylor College of Medicine, Houston, TX, USA
- Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX, USA
| | - Qussay Marashly
- Department of Cardiology, Montefiore Medical Center, New York, NY, USA
| | - Jitae A Kim
- Division of CardiovasculMedicine, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
| | - Na Li
- Department of Medicine (Section of Cardiovascular Research), Baylor College of Medicine, Houston, TX, USA
- Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX, USA
| | - Mihail G Chelu
- Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX, USA
- Department of Medicine (Division of Cardiology), Baylor College of Medicine, Houston, TX, USA
- Division of Cardiology, Baylor St. Luke's Medical Center, Houston, TX, USA
- Division of Cardiology, Texas Heart Institute, Houston, TX, USA
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10
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Maigrot JLA, Weiss AJ, Wazni O, Starling RC. Multidisciplinary approach to long-standing left bundle branch block with dyssynchrony and aortic stenosis: case report. Eur Heart J Case Rep 2024; 8:ytae127. [PMID: 38567275 PMCID: PMC10986398 DOI: 10.1093/ehjcr/ytae127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 02/20/2024] [Accepted: 03/08/2024] [Indexed: 04/04/2024]
Abstract
Background Cardiac resynchronization therapy (CRT) is recommended for patients with symptomatic heart failure in sinus rhythm with left ventricular ejection fraction (LVEF) ≤ 35%, QRS duration ≥ 150 ms, and left bundle branch block (LBBB) morphology. However, when severe left ventricular dysfunction and cardiogenic shock are present, treatment paradigms are often limited to palliative medical therapy or advanced therapies with durable left ventricular assist device or heart transplant as the functional and survival benefit of CRT in these patients remains uncertain. Case summary A 77-year-old white man with long-standing LBBB with dyssynchrony, severely reduced LVEF of 4%, and severe bicuspid aortic stenosis (AS) presented with worsening heart failure symptoms. After multidisciplinary heart team evaluation and pre-operative optimization, the patient underwent a surgical aortic valve replacement with simultaneous intraoperative initiation of CRT with pacemaker (CRT-P) and temporary mechanical circulatory support. Echocardiography at 44 days and 201 days post-discharge showed an LVEF of 29% and 40%, respectively. Discussion This case demonstrates that reverse remodelling and native heart recovery were successfully achieved in a patient with advanced structural heart disease, presenting with cardiogenic shock, through an early and aggressive approach involving multidisciplinary heart team evaluation, treatment of severe AS with surgical aortic valve replacement, prophylactic intraoperative initiation of temporary mechanical circulatory support, and early initiation of CRT-P.
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Affiliation(s)
- Jean-Luc A Maigrot
- Department of Thoracic and Cardiovascular Surgery, Kaufman Center for Heart Failure Treatment and Recovery, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Aaron J Weiss
- Department of Thoracic and Cardiovascular Surgery, Kaufman Center for Heart Failure Treatment and Recovery, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Oussama Wazni
- Department of Cardiovascular Medicine, Section of Cardiac Electrophysiology and Pacing, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Randall C Starling
- Department of Cardiovascular Medicine, Kaufman Center for Heart Failure Treatment and Recovery, Heart, Vascular and Thoracic Institute, Cleveland Clinic, 9500 Euclid Avenue, Desk J3-4, Cleveland, OH 44195, USA
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11
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Saito T, Inohara T, Tsuruta H, Yashima F, Shimizu H, Fukuda K, Ohno Y, Nishina H, Izumo M, Asami M, Naganuma T, Mizutani K, Yamawaki M, Tada N, Yamanaka F, Shirai S, Noguchi M, Ueno H, Takagi K, Watanabe Y, Yamamoto M, Hayashida K. Pre-Existing Left Bundle Branch Block and Clinical Outcomes After Transcatheter Aortic Valve Replacement. JACC. ASIA 2024; 4:306-319. [PMID: 38660100 PMCID: PMC11035950 DOI: 10.1016/j.jacasi.2023.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 10/11/2023] [Accepted: 11/05/2023] [Indexed: 04/26/2024]
Abstract
Background Few reports on pre-existing left bundle branch block (LBBB) in patients undergoing transcatheter aortic valve replacement (TAVR) are currently available. Further, no present studies compare patients with new onset LBBB with those with pre-existing LBBB. Objectives This study aimed to investigate the association between pre-existing or new onset LBBB and clinical outcomes after TAVR. Methods Using data from the Japanese multicenter registry, 5,996 patients who underwent TAVR between October 2013 and December 2019 were included. Patients were classified into 3 groups: no LBBB, pre-existing LBBB, and new onset LBBB. The 2-year clinical outcomes were compared between 3 groups using Cox proportional hazards models and propensity score analysis to adjust the differences in baseline characteristics. Results Of 5,996 patients who underwent TAVR, 280 (4.6%) had pre-existing LBBB, while 1,658 (27.6%) experienced new onset LBBB. Compared with the no LBBB group, multivariable Cox regression analysis showed that pre-existing LBBB was associated not only with a higher 2-year all-cause (adjusted HR: 1.39; 95% CI: 1.06-1.82; P = 0.015) and cardiovascular (adjusted HR: 1.60; 95% CI: 1.04-2.48; P = 0.031) mortality, but also with higher all-cause (adjusted HR: 1.43, 95% CI: 1.07-1.91; P = 0.016) and cardiovascular (adjusted HR: 1.81, 95% CI:1.12-2.93; P = 0.014) mortality than the new onset LBBB group. Heart failure was the most common cause of cardiovascular death, with more heart failure deaths in the pre-existing LBBB group. Conclusions Pre-existing LBBB was independently associated with poor clinical outcomes, reflecting an increased risk of cardiovascular mortality after TAVR. Patients with pre-existing LBBB should be carefully monitored.
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Affiliation(s)
- Tetsuya Saito
- Department of Cardiology, Keio University School of Medicine, Tokyo, Japan
| | - Taku Inohara
- Department of Cardiology, Keio University School of Medicine, Tokyo, Japan
| | - Hikaru Tsuruta
- Department of Cardiology, Keio University School of Medicine, Tokyo, Japan
| | - Fumiaki Yashima
- Department of Cardiology, Saiseikai Utsunomiya Hospital, Tochigi, Japan
| | - Hideyuki Shimizu
- Department of Cardiovascular Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Keiichi Fukuda
- Department of Cardiology, Keio University School of Medicine, Tokyo, Japan
| | - Yohei Ohno
- Department of Cardiology, Tokai University School of Medicine, Isehara, Japan
| | - Hidetaka Nishina
- Department of Cardiology, Tsukuba Medical Center Hospital, Tsukuba, Japan
| | - Masaki Izumo
- Department of Cardiology, St. Marianna University, Tokyo, Japan
| | - Masahiko Asami
- Division of Cardiology, Mitsui Memorial Hospital, Tokyo, Japan
| | - Toru Naganuma
- Department of Cardiology, New Tokyo Hospital, Matsudo, Japan
| | | | - Masahiro Yamawaki
- Department of Cardiology, Saiseikai Yokohama-City Eastern Hospital, Tsurumi, Japan
| | - Norio Tada
- Department of Cardiology, Sendai Kousei Hospital, Sendai, Japan
| | - Futoshi Yamanaka
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
| | - Shinichi Shirai
- Department of Cardiology, Kokura Memorial Hospital, Kokura, Japan
| | - Masahiko Noguchi
- Department of Cardiology, Tokyo Bay Urayasu Ichikawa Medical Center, Urayasu, Japan
| | - Hiroshi Ueno
- Department of Cardiology, Toyama University Hospital, Toyama, Japan
| | - Kensuke Takagi
- Department of Cardiology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Yusuke Watanabe
- Department of Cardiology, Teikyo University School of Medicine, Tokyo, Japan
| | - Masanori Yamamoto
- Department of Cardiology, Toyohashi Heart Center, Toyohashi, Japan
- Department of Cardiology, Nagoya Heart Center, Nagoya, Japan
- Department of Cardiology, Gifu Heart Center, Gifu, Japan
| | - Kentaro Hayashida
- Department of Cardiology, Keio University School of Medicine, Tokyo, Japan
| | - the OCEAN-TAVI Investigators
- Department of Cardiology, Keio University School of Medicine, Tokyo, Japan
- Department of Cardiology, Saiseikai Utsunomiya Hospital, Tochigi, Japan
- Department of Cardiovascular Surgery, Keio University School of Medicine, Tokyo, Japan
- Department of Cardiology, Tokai University School of Medicine, Isehara, Japan
- Department of Cardiology, Tsukuba Medical Center Hospital, Tsukuba, Japan
- Department of Cardiology, St. Marianna University, Tokyo, Japan
- Division of Cardiology, Mitsui Memorial Hospital, Tokyo, Japan
- Department of Cardiology, New Tokyo Hospital, Matsudo, Japan
- Department of Cardiology, Kinki University, Osaka, Japan
- Department of Cardiology, Saiseikai Yokohama-City Eastern Hospital, Tsurumi, Japan
- Department of Cardiology, Sendai Kousei Hospital, Sendai, Japan
- Department of Cardiology, Shonan Kamakura General Hospital, Kamakura, Japan
- Department of Cardiology, Kokura Memorial Hospital, Kokura, Japan
- Department of Cardiology, Tokyo Bay Urayasu Ichikawa Medical Center, Urayasu, Japan
- Department of Cardiology, Toyama University Hospital, Toyama, Japan
- Department of Cardiology, National Cerebral and Cardiovascular Center, Osaka, Japan
- Department of Cardiology, Teikyo University School of Medicine, Tokyo, Japan
- Department of Cardiology, Toyohashi Heart Center, Toyohashi, Japan
- Department of Cardiology, Nagoya Heart Center, Nagoya, Japan
- Department of Cardiology, Gifu Heart Center, Gifu, Japan
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12
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Chang R, Luo D, He W, Tang W, Chen J, Li J, Liu M, Zhang X, Chen X, Su C, Jiang J, Long M, Wang L. A novel method for septal reduction therapy by three-dimensional guided transvenous intraseptal pulsed-field ablation. Heart Rhythm 2024; 21:258-267. [PMID: 38008368 DOI: 10.1016/j.hrthm.2023.11.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 11/15/2023] [Accepted: 11/20/2023] [Indexed: 11/28/2023]
Abstract
BACKGROUND Pulsed-field ablation (PFA) is a nonthermal method for achieving selective cell death with little inflammation response. However, there are no reports of PFA for septal reduction therapy (SRT). OBJECTIVE The purpose of this study was to investigate the effectiveness and safety of PFA for SRT. METHODS A novel transvenous intraseptal PFA method with 3-dimensional (3D) guidance was introduced in Yorkshire pigs. Electrocardiographic parameters, transthoracic echocardiography, and histopathology were used to evaluated. RESULTS The maximum injury diameter of intramyocardial PFA increased with electric field intensity. After PFA, bipolar electrogram amplitude and pacing threshold measured by the PFA electrodes significantly decreased (F = 6.945, P = .007) or increased (F = 5.842, P = .024), respectively. In the ablated septal region, motion amplitude and systolic wall thickening rate significantly decreased and remained at low levels (motion amplitude: F = 20.793, P = .000; systolic wall thickening rate: F = 14.343, P = .000); however, septal thickness did not significantly change after PFA (F = 1.503, P = .248). Histologic examination showed specific cardiomyocyte death with gradually increased hyperchromatic cytoplasm and nuclear pyknosis, without obvious inflammatory cell infiltration in acute phase. TUNEL stain for fragmented DNA showed extensively positive in the ablation region 24 hours after PFA. During PFA, no sustained ventricular arrhythmia or atrioventricular conduction block occurred. CONCLUSION A novel intraseptal PFA method with 3D guidance was described. Intraseptal PFA resulted in effective myocardial injury and local hypokinesis without significant acute edema. Histologic examination showed widely programmed cardiomyocyte death with little inflammatory cell infiltration.
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Affiliation(s)
- Rongxuan Chang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Key Laboratory on Assisted Circulation, Guangzhou, Guangdong, China
| | - Duan Luo
- Department of Cardiology, The Affiliated Hospital of Southwest Jiaotong University, The Third People's Hospital of Chengdu, Chengdu, Sichuan, China
| | - Wei He
- Department of Medical Ultrasonics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Wei Tang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Key Laboratory on Assisted Circulation, Guangzhou, Guangdong, China
| | - Jian Chen
- Department of Cardiac Surgery, The Affiliated Hospital of Southwest Jiaotong University, The Third People's Hospital of Chengdu, Chengdu, Sichuan, China
| | - Jie Li
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Key Laboratory on Assisted Circulation, Guangzhou, Guangdong, China
| | - Menghui Liu
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Key Laboratory on Assisted Circulation, Guangzhou, Guangdong, China
| | - Xiaoyu Zhang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Key Laboratory on Assisted Circulation, Guangzhou, Guangdong, China
| | - Xumiao Chen
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Key Laboratory on Assisted Circulation, Guangzhou, Guangdong, China
| | - Chen Su
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Key Laboratory on Assisted Circulation, Guangzhou, Guangdong, China
| | - Jingzhou Jiang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Key Laboratory on Assisted Circulation, Guangzhou, Guangdong, China
| | - Ming Long
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Key Laboratory on Assisted Circulation, Guangzhou, Guangdong, China.
| | - Lichun Wang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Key Laboratory on Assisted Circulation, Guangzhou, Guangdong, China.
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13
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Tan NY, Adedinsewo D, El Sabbagh A, Ahmed AFS, Morales-Lara AC, Wieczorek M, Madhavan M, Mulpuru SK, Deshmukh AJ, Asirvatham SJ, Eleid MF, Friedman PA, Cha YM, Killu AM. Incidence and Outcomes of New-Onset Right Bundle Branch Block Following Transcatheter Aortic Valve Replacement. Circ Arrhythm Electrophysiol 2024; 17:e012377. [PMID: 38288627 PMCID: PMC11166259 DOI: 10.1161/circep.123.012377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 01/02/2024] [Indexed: 02/22/2024]
Abstract
BACKGROUND The incidence and prognosis of right bundle branch block (RBBB) following transcatheter aortic valve replacement (TAVR) are unknown. Hence, we sought to characterize the incidence of post-TAVR RBBB and determine associated risks of permanent pacemaker (PPM) implantation and mortality. METHODS All patients 18 years and above without preexisting RBBB or PPM who underwent TAVR at US Mayo Clinic sites and Mayo Clinic Health Systems from June 2010 to May 2021 were evaluated. Post-TAVR RBBB was defined as new-onset RBBB in the postimplantation period. The risks of PPM implantation (within 90 days) and mortality following TAVR were compared for patients with and without post-TAVR RBBB using Kaplan-Meier analysis and Cox proportional hazards modeling. The risks of PPM implantation (within 90 days) and mortality following TAVR were compared for patients with and without post-TAVR RBBB using Kaplan-Meier analysis and Cox proportional hazards modeling. RESULTS Of 1992 patients, 15 (0.75%) experienced new RBBB post-TAVR. There was a higher degree of valve oversizing among patients with new RBBB post-TAVR versus those without (17.9% versus 10.0%; P=0.034). Ten patients (66.7%) with post-TAVR RBBB experienced high-grade atrioventricular block and underwent PPM implantation (median 1 day; Q1, 0.2 and Q3, 4), compared with 268/1977 (13.6%) without RBBB. Following propensity score adjustment for covariates (age, sex, balloon-expandable valve, annulus diameter, and valve oversizing), post-TAVR RBBB was significantly associated with PPM implantation (hazard ratio, 8.36 [95% CI, 4.19-16.7]; P<0.001). No statistically significant increase in mortality was seen with post-TAVR RBBB (hazard ratio, 0.83 [95% CI, 0.33-2.11]; P=0.69), adjusting for age and sex. CONCLUSIONS Although infrequent, post-TAVR RBBB was associated with elevated PPM implantation risk. The mechanisms for its development and its clinical prognosis require further study.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - Yong-Mei Cha
- Dept of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
| | - Ammar M. Killu
- Dept of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
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14
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Ahmadzadeh M, Rahimi M, Toufan-Tabrizi* M, Mohammadi K. Determining whether LV filling time contributes to HF symptoms in different widths of QRS in LBBB patients: A clinical study. Glob Cardiol Sci Pract 2024; 2024:e202408. [PMID: 38404659 PMCID: PMC10886770 DOI: 10.21542/gcsp.2024.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 11/11/2023] [Indexed: 02/27/2024] Open
Abstract
OBJECTIVES Accurate assessment of left ventricular (LV) function is essential for managing patients with left bundle branch block (LBBB). This study aimed to evaluate the relationship between LV systolic function, left ventricular diastolic filling time (LVFT), QRS duration, and heart failure symptoms in patients with LBBB. METHODS This study was conducted between June 2021 and June 2022. Patients with LBBB and sinus rhythm who were referred to the echocardiography department were included in the study. All the patients underwent electrocardiogram-gated echocardiography using the same machine. In this study, the LVFT value was measured in absolute terms and as a ratio to the R-R interval (LVFT/RR). RESULTS A total of sixty-five patients were included, forty-two (64.6%) were women, and the mean age was 60.71 ± 8.72. We performed three one-way ANOVA tests that showed that LV filling time/RR ratio, QRS duration, and ejection fraction were significantly different between heart failure classes (p = 0.008, p = 0.001, and p < 0.001, respectively). A weak correlation was observed between LVEF and LVFT/RR (r = 0.349, p = 0.004). Additionally, QRS duration was negatively correlated with LVEF (r = - 0.395, p = 0.004) and LVFT/RR (r = - 0.350, p = 0.004), although these correlations were weak. CONCLUSION We showed that LVFT/RR ratio differed significantly between HF functional classes and was lower in patients with more severe HF symptoms. Additionally, QRS duration was negatively correlated with LVEF and LVFT/RR, and patients with more severe HF symptoms had longer QRS durations.
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Affiliation(s)
| | | | | | - Kamran Mohammadi
- Cardiovascular Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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15
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Pokhrel Bhattarai S, Block RC, Xue Y, Rodriguez DH, Tucker RG, Carey MG. Integrative review of electrocardiographic characteristics in patients with reduced, mildly reduced, and preserved heart failure. Heart Lung 2024; 63:142-158. [PMID: 37913557 DOI: 10.1016/j.hrtlng.2023.10.012] [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: 07/27/2023] [Revised: 10/09/2023] [Accepted: 10/23/2023] [Indexed: 11/03/2023]
Abstract
INTRODUCTION Electrocardiographic (ECG) changes in heart failure with reduced, mildly reduced, and preserved ejection fractions can be critical in clinical assessment while waiting to perform echocardiograms or when it is unavailable. This integrative review aimed to identify ECG characteristics among hospitalized patients demonstrating three types of heart failure during acute decompensation. METHODS We searched an electronic database of PubMed, Web of Science, EMBASE, Scopus, Google Scholar, and ClinicalTrials.gov using medical subject headings (MeSH) terms and keywords. Sixteen studies were synthesized and reported. RESULTS Heart failure with reduced ejection fraction (HFrEF) was more common in men, comorbid with coronary artery diseases and diabetes mellitus, higher BNP/Pro-BNP, wide QRS, and left bundle branch block on ECG. On average, clients with heart failure with preserved ejection fraction (HFpEF) were older and more likely to have a history of atrial fibrillation, valvular heart diseases, hypertension, chronic obstructive pulmonary, and atrial fibrillation (AF) on ECG. Patients with mildly reduced (HFmrEF) were more similar to HFpEF in older patients, comorbid with hypertension, AF and valvular diseases, and AF on ECG. CONCLUSIONS ECG characteristics might be related to left ventricular ejection fraction. Demographics, BNP/Pro-BNP, and ECG changes might help differentiate different heart failure types. Therefore, ECG might be a prognostic tool while caring for heart failure patients when highly skilled resources are unavailable. These identified ECG characteristics help generate research hypotheses and warrant validation in future research.
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Affiliation(s)
- Sunita Pokhrel Bhattarai
- University of Rochester School of Nursing, 255 Crittenden Boulevard, Box SON, Rochester, NY 14642, United States.
| | | | - Ying Xue
- University of Rochester School of Nursing, 255 Crittenden Boulevard, Box SON, Rochester, NY 14642, United States
| | - Darcey H Rodriguez
- University of Rochester School of Nursing, 255 Crittenden Boulevard, Box SON, Rochester, NY 14642, United States; University of Rochester Medical Center, United States
| | - Rebecca G Tucker
- University of Rochester School of Nursing, 255 Crittenden Boulevard, Box SON, Rochester, NY 14642, United States
| | - Mary G Carey
- University of Rochester School of Nursing, 255 Crittenden Boulevard, Box SON, Rochester, NY 14642, United States; University of Rochester Medical Center, United States
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16
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Leeper BB. Intraventricular Conduction Abnormalities. AACN Adv Crit Care 2023; 34:391-396. [PMID: 38033214 DOI: 10.4037/aacnacc2023109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Affiliation(s)
- Barbara Bobbi Leeper
- Barbara "Bobbi" Leeper is Consultant, Cardiovascular and Critical Care Nursing, Dallas, Texas
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17
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Day M, Bruce K, Moore AK, Mello I, Hilliard T. Basics of the 12-lead ECG: Part 2. Nursing 2023; 53:21-26. [PMID: 37973007 DOI: 10.1097/01.nurse.0000991560.56637.b6] [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: 11/19/2023]
Abstract
ABSTRACT A 12-lead ECG is a noninvasive diagnostic tool that detects and records cardiac electrical activity and can identify cardiac pathology. This article discusses select ECG abnormalities including myocardial infarction, bundle-branch blocks, and heart blocks. This is part 2 of a two-part series. Part 1 was published in the November 2023 issue of Nursing2023.
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Affiliation(s)
- Mercedes Day
- At Texas Tech University Health Sciences Center in Lubbock, Tex., Mercedes Day is an assistant professor; Kellie Bruce, Inola Mello, and Amy Moore are professors; and Tara Hilliard is an associate professor
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18
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A.F. de Souza I, M.H. Padrao E, R. Marques I, A. Miyawaki I, Riceto Loyola Júnior JE, Caporal S. Moreira V, Gomes C, H.A. Silva C, Oprysko C, Barreto do Amaral Neto A, Cardoso R, Samesiana N, Alberto Pastore C, Tavares CA. Diagnostic Accuracy of ECG to Detect Left Ventricular Hypertrophy in Patients with Left Bundle Branch Block: A Systematic Review and Meta-analysis. CJC Open 2023; 5:971-980. [PMID: 38204852 PMCID: PMC10774079 DOI: 10.1016/j.cjco.2023.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 08/24/2023] [Indexed: 01/12/2024] Open
Abstract
Background Electrocardiographic (ECG) criteria to detect left ventricular hypertrophy (LVH) in patients with left bundle branch block (LBBB) remain under debate. We conducted a systematic review and meta-analysis to evaluate the diagnostic accuracy of different ECG criteria for diagnosing LVH in patients with LBBB. Methods We searched PubMed, Embase, Cochrane, and LILACS for articles evaluating the diagnostic accuracy of ECG criteria for LVH in patients with LBBB published between 1984 and 2023. Echocardiogram, magnetic resonance imaging, or autopsy were used as the reference standard for diagnosis of LVH. Risk of bias was assessed using the Quality Assessment of Diagnostic Accuracy Studies (QUADAS-2) tool. The co-primary outcomes were sensitivity, specificity, the diagnostic odds ratio, and likelihood ratios, estimated using a bivariate generalized linear mixed model for each ECG criterion. The prespecified protocol was registered in the International Prospective Register of Systematic Reviews (PROSPERO). Results We included 12 studies with a total of 1023 patients. We analyzed 10 criteria for LVH on ECG, including the Sokolow-Lyon criterion, the Cornell criterion, the RaVL (R wave in aVL) criterion, the Gubner-Ungerleider criterion, and the Dálfo criterion, among others. The Dalfó criterion was used for 487 patients and had the highest pooled sensitivity of 86% (95% confidence interval [CI] 57%-97%). All the other criteria had poor sensitivities. The Gubner-Ungerleider criterion and the RV5 or RV6 > 25 mm criterion had the highest specificities, with the former being used for 805 patients, obtaining a specificity of 99% (95% CI 80%-100%) and the latter being used for 355 patients, obtaining a specificity of 99% (95% CI 94%-100%). Conclusions In patients with LBBB, the use of ECG criteria had poor performance for ruling out LVH, mostly due to low sensitivities. None of the criteria analyzed demonstrated a balanced tradeoff between sensitivity and specificity, suggesting that ECG should not be used routinely to screen for LVH.
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Affiliation(s)
| | - Eduardo M.H. Padrao
- Department of Pulmonary and Critical Care, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | | | | | | | | | - Cintia Gomes
- Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Caroliny H.A. Silva
- Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Carson Oprysko
- Department of Internal Medicine, University of Connecticut, Farmington, Connecticut, USA
| | | | - Rhanderson Cardoso
- Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Nelson Samesiana
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, São Paulo, SP, Brazil
| | | | - Caio A.M. Tavares
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, São Paulo, SP, Brazil
- Academic Research Organization (ARO), Hospital Israelita Albert Einstein, São Paulo, SP, Brazil
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Cano Ó, Navarrete-Navarro J, Jover P, Osca J, Izquierdo M, Navarro J, Ayala HD, Martínez-Dolz L. Conduction System Pacing for Cardiac Resynchronization Therapy. J Cardiovasc Dev Dis 2023; 10:448. [PMID: 37998506 PMCID: PMC10672305 DOI: 10.3390/jcdd10110448] [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: 09/13/2023] [Revised: 10/18/2023] [Accepted: 10/25/2023] [Indexed: 11/25/2023] Open
Abstract
Cardiac resynchronization therapy (CRT) via biventricular pacing (BiVP-CRT) is considered a mainstay treatment for symptomatic heart failure patients with reduced ejection fraction and wide QRS. However, up to one-third of patients receiving BiVP-CRT are considered non-responders to the therapy. Multiple strategies have been proposed to maximize the percentage of CRT responders including two new physiological pacing modalities that have emerged in recent years: His bundle pacing (HBP) and left bundle branch area pacing (LBBAP). Both pacing techniques aim at restoring the normal electrical activation of the ventricles through the native conduction system in opposition to the cell-to-cell activation of conventional right ventricular myocardial pacing. Conduction system pacing (CSP), including both HBP and LBBAP, appears to be a promising pacing modality for delivering CRT and has proven to be safe and feasible in this particular setting. This article will review the current state of the art of CSP-based CRT, its limitations, and future directions.
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Affiliation(s)
- Óscar Cano
- Electrophysiology Section, Cardiology Department, Hospital Universitari i Politècnic La Fe, Área de Enfermedades Cardiovasculares, Planta 4-Torre F. Av, Fernando Abril Martorell, 106, 46026 Valencia, Spain (H.D.A.)
- Centro de Investigaciones Biomédicas en RED en Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
- Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain
| | - Javier Navarrete-Navarro
- Electrophysiology Section, Cardiology Department, Hospital Universitari i Politècnic La Fe, Área de Enfermedades Cardiovasculares, Planta 4-Torre F. Av, Fernando Abril Martorell, 106, 46026 Valencia, Spain (H.D.A.)
- Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain
| | - Pablo Jover
- Electrophysiology Section, Cardiology Department, Hospital Universitari i Politècnic La Fe, Área de Enfermedades Cardiovasculares, Planta 4-Torre F. Av, Fernando Abril Martorell, 106, 46026 Valencia, Spain (H.D.A.)
- Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain
| | - Joaquín Osca
- Electrophysiology Section, Cardiology Department, Hospital Universitari i Politècnic La Fe, Área de Enfermedades Cardiovasculares, Planta 4-Torre F. Av, Fernando Abril Martorell, 106, 46026 Valencia, Spain (H.D.A.)
- Centro de Investigaciones Biomédicas en RED en Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
- Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain
| | - Maite Izquierdo
- Electrophysiology Section, Cardiology Department, Hospital Universitari i Politècnic La Fe, Área de Enfermedades Cardiovasculares, Planta 4-Torre F. Av, Fernando Abril Martorell, 106, 46026 Valencia, Spain (H.D.A.)
- Centro de Investigaciones Biomédicas en RED en Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
- Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain
| | - Josep Navarro
- Electrophysiology Section, Cardiology Department, Hospital Universitari i Politècnic La Fe, Área de Enfermedades Cardiovasculares, Planta 4-Torre F. Av, Fernando Abril Martorell, 106, 46026 Valencia, Spain (H.D.A.)
| | - Hebert D. Ayala
- Electrophysiology Section, Cardiology Department, Hospital Universitari i Politècnic La Fe, Área de Enfermedades Cardiovasculares, Planta 4-Torre F. Av, Fernando Abril Martorell, 106, 46026 Valencia, Spain (H.D.A.)
- Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain
| | - Luis Martínez-Dolz
- Electrophysiology Section, Cardiology Department, Hospital Universitari i Politècnic La Fe, Área de Enfermedades Cardiovasculares, Planta 4-Torre F. Av, Fernando Abril Martorell, 106, 46026 Valencia, Spain (H.D.A.)
- Centro de Investigaciones Biomédicas en RED en Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
- Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain
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20
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Dathe H, Krefting D, Spicher N. Completing the Cabrera Circle: deriving adaptable leads from ECG limb leads by combining constraints with a correction factor. Physiol Meas 2023; 44:105005. [PMID: 37673079 DOI: 10.1088/1361-6579/acf754] [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: 03/27/2023] [Accepted: 09/06/2023] [Indexed: 09/08/2023]
Abstract
Objective.We present a concept for processing 6-lead electrocardiography (ECG) signals which can be applied to various use cases in quantitative electrocardiography.Approach.Our work builds upon the mathematics of the well-known Cabrera sequence which is a re-sorting of the six limb leads (I,II,III,aVR,aVL,aVF) into a clockwise and physiologically-interpretable order. By deriving correction factors for harmonizing lead strengths and choosing an appropriate basis for the leads, we extend this concept towards what we call the 'Cabrera Circle' based on a mathematically sound foundation.Main results.To demonstrate the practical effectiveness and relevance of this concept, we analyze its suitability for deriving interpolated leads between the six limb leads and a 'radial' lead which both can be useful for specific use cases. We focus on the use cases of i) determination of the electrical heart axis by proposing a novel interactive tool for reconstructing the heart's vector loop and ii) improving accuracy in time of automatic R-wave detection and T-wave delineation in 6-lead ECG. For the first use case, we derive an equation which allows projections of the 2-dimensional vector loops to arbitrary angles of the Cabrera Circle. For the second use case, we apply several state-of-the-art algorithms to a freely-available 12-lead dataset (Lobachevsky University Database). Out-of-the-box results show that the derived radial lead outperforms the other limb leads (I,II,III,aVR,aVL,aVF) by improving F1 scores of R-peak and T-peak detection by 0.61 and 2.12, respectively. Results of on- and offset computations are also improved but on a smaller scale.Significance.In summary, the Cabrera Circle offers a methodology that might be useful for quantitative electrocardiography of the 6-lead subsystem-especially in the digital age.
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Affiliation(s)
- Henning Dathe
- Department of Medical Informatics, University Medical Center, Göttingen, Germany
| | - Dagmar Krefting
- Department of Medical Informatics, University Medical Center, Göttingen, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Göttingen, Göttingen, Germany
- Campus Institute Data Science, Georg-August-University Göttingen, Göttingen, Germany
| | - Nicolai Spicher
- Department of Medical Informatics, University Medical Center, Göttingen, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Göttingen, Göttingen, Germany
- Campus Institute Data Science, Georg-August-University Göttingen, Göttingen, Germany
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21
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Kupchik N, Green J. A Case of Asymptomatic Arrhythmia. Am J Nurs 2023; 123:53-56. [PMID: 37615471 DOI: 10.1097/01.naj.0000978164.92915.41] [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: 08/25/2023]
Abstract
Editor's note: This is the next installment in a series on electrocardiogram (ECG) interpretation. Nurses in all settings should know the basics, as medications and physiological changes can cause cardiac arrhythmias. Each article will start with a brief case scenario and an ECG strip and then take you step by step through analyzing the heart rhythm.
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Affiliation(s)
- Nicole Kupchik
- Nicole Kupchik is an independent clinical nurse specialist at Nicole Kupchik Consulting, and Joel Green is a staff nurse at the University of Washington Medical Center, both in Seattle. Kupchik also coordinates Strip Savvy : . The authors have disclosed no potential conflicts of interest, financial or otherwise
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22
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Ray L, Geier C, DeWitt KM. Pathophysiology and treatment of adults with arrhythmias in the emergency department, part 2: Ventricular and bradyarrhythmias. Am J Health Syst Pharm 2023; 80:1123-1136. [PMID: 37235971 DOI: 10.1093/ajhp/zxad115] [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: 05/25/2023] [Indexed: 05/28/2023] Open
Abstract
PURPOSE This is the second article in a 2-part series reviewing the pathophysiology and treatment considerations for arrhythmias. Part 1 of the series discussed aspects related to treating atrial arrhythmias. Here in part 2, the pathophysiology of ventricular arrhythmias and bradyarrhythmias and current evidence on treatment approaches are reviewed. SUMMARY Ventricular arrhythmias can arise suddenly and are a common cause of sudden cardiac death. Several antiarrhythmics may be effective in management of ventricular arrhythmias, but there is robust evidence to support the use of only a few of these agents, and such evidence was largely derived from trials involving patients with out-of-hospital cardiac arrest. Bradyarrhythmias range from asymptomatic mild prolongation of nodal conduction to severe conduction delays and impending cardiac arrest. Vasopressors, chronotropes, and pacing strategies require careful attention and titration to minimize adverse effects and patient harm. CONCLUSION Ventricular arrhythmias and bradyarrhythmias can be consequential and require acute intervention. As experts in pharmacotherapy, acute care pharmacists can participate in providing high-level intervention by aiding in diagnostic workup and medication selection.
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Affiliation(s)
- Lance Ray
- Denver Health and Hospital Authority, Denver, CO, and Department of Emergency Medicine, University of Colorado, Aurora, CO, USA
| | - Curtis Geier
- San Francisco General Hospital, San Francisco, CA, USA
| | - Kyle M DeWitt
- University of Vermont Medical Center, Burlington, VT, USA
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23
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Pujol-López M, Tolosana JM, Upadhyay GA, Mont L, Tung R. Left Bundle Branch Block: Characterization, Definitions, and Recent Insights into Conduction System Physiology. Cardiol Clin 2023; 41:379-391. [PMID: 37321688 DOI: 10.1016/j.ccl.2023.03.003] [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: 06/17/2023]
Abstract
Left bundle branch block (LBBB) is not just a simple electrocardiogram alteration. The intricacies of this general terminology go beyond simple conduction block. This review puts together current knowledge on the historical concept of LBBB, clinical significance, and recent insights into the pathophysiology of human LBBB. LBBB is an entity that affects patient diagnosis (primary conduction disease, secondary to underlying pathology or iatrogenic), treatment (cardiac resynchronization therapy or conduction system pacing for heart failure), and prognosis. Recruiting the left bundle branch with conduction system pacing depends on the complex interaction between anatomy, site of pathophysiology, and delivery tools.
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Affiliation(s)
- Margarida Pujol-López
- Arrhythmia Section, Cardiology Department, Institut Clínic Cardiovascular, Hospital Clínic de Barcelona, Universitat de Barcelona, C/ Villarroel 170, Barcelona, Catalonia 08036, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Catalonia, Spain
| | - José M Tolosana
- Arrhythmia Section, Cardiology Department, Institut Clínic Cardiovascular, Hospital Clínic de Barcelona, Universitat de Barcelona, C/ Villarroel 170, Barcelona, Catalonia 08036, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Catalonia, Spain; Centro de Investigación Biomédica en Red Enfermedades Cardiovasculares, Madrid, Spain
| | - Gaurav A Upadhyay
- Center for Arrhythmia Care, Pritzker School of Medicine, University of Chicago, The University of Chicago Medicine, Heart and Vascular Center, 5841 South Maryland Avenue, Chicago, IL 60637, USA
| | - Lluís Mont
- Arrhythmia Section, Cardiology Department, Institut Clínic Cardiovascular, Hospital Clínic de Barcelona, Universitat de Barcelona, C/ Villarroel 170, Barcelona, Catalonia 08036, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Catalonia, Spain; Centro de Investigación Biomédica en Red Enfermedades Cardiovasculares, Madrid, Spain
| | - Roderick Tung
- Center for Arrhythmia Care, Pritzker School of Medicine, University of Chicago, The University of Chicago Medicine, Heart and Vascular Center, 5841 South Maryland Avenue, Chicago, IL 60637, USA.
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24
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Ismail SR, Mohammad MSF, Butterworth AS, Chowdhury R, Danesh J, Di Angelantonio E, Griffin SJ, Pennells L, Wood AM, Md Noh MF, Shah SA. Risk Factors of Secondary Cardiovascular Events in a Multi-Ethnic Asian Population with Acute Myocardial Infarction: A Retrospective Cohort Study from Malaysia. J Cardiovasc Dev Dis 2023; 10:250. [PMID: 37367415 PMCID: PMC10299045 DOI: 10.3390/jcdd10060250] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/28/2023] [Accepted: 05/29/2023] [Indexed: 06/28/2023] Open
Abstract
This retrospective cohort study investigated the incidence and risk factors of major adverse cardiovascular events (MACE) after 1 year of first-documented myocardial infarctions (MIs) in a multi-ethnic Asian population. Secondary MACE were observed in 231 (14.3%) individuals, including 92 (5.7%) cardiovascular-related deaths. Both histories of hypertension and diabetes were associated with secondary MACE after adjustment for age, sex, and ethnicity (HR 1.60 [95%CI 1.22-2.12] and 1.46 [95%CI 1.09-1.97], respectively). With further adjustments for traditional risk factors, individuals with conduction disturbances demonstrated higher risks of MACE: new left-bundle branch block (HR 2.86 [95%CI 1.15-6.55]), right-bundle branch block (HR 2.09 [95%CI 1.02-4.29]), and second-degree heart block (HR 2.45 [95%CI 0.59-10.16]). These associations were broadly similar across different age, sex, and ethnicity groups, although somewhat greater for history of hypertension and BMI among women versus men, for HbA1c control in individuals aged >50 years, and for LVEF ≤ 40% in those with Indian versus Chinese or Bumiputera ethnicities. Several traditional and cardiac risk factors are associated with a higher risk of secondary major adverse cardiovascular events. In addition to hypertension and diabetes, the identification of conduction disturbances in individuals with first-onset MI may be useful for the risk stratification of high-risk individuals.
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Affiliation(s)
- Sophia Rasheeqa Ismail
- Nutrition, Metabolic and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health Malaysia, Shah Alam 40170, Malaysia; (S.R.I.)
- Department of Community Health, Faculty of Medicine, National University of Malaysia, Kuala Lumpur 56000, Malaysia
| | | | - Adam S. Butterworth
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB2 0BB, UK (E.D.A.)
- British Heart Foundation Centre of Research Excellence, University of Cambridge, Cambridge CB2 0BB, UK
- National Institute for Health and Care Research Blood and Transplant Research Unit in Donor Health and Behaviour, University of Cambridge, Cambridge CB2 0BB, UK
- Health Data Research UK Cambridge, Wellcome Genome Campus, University of Cambridge, Cambridge CB10 1SA, UK
| | - Rajiv Chowdhury
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB2 0BB, UK (E.D.A.)
- Stempel College of Public Health and Social Work, Florida International University, Miami, FL 33174, USA
| | - John Danesh
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB2 0BB, UK (E.D.A.)
- British Heart Foundation Centre of Research Excellence, University of Cambridge, Cambridge CB2 0BB, UK
- National Institute for Health and Care Research Blood and Transplant Research Unit in Donor Health and Behaviour, University of Cambridge, Cambridge CB2 0BB, UK
- Health Data Research UK Cambridge, Wellcome Genome Campus, University of Cambridge, Cambridge CB10 1SA, UK
- Department of Human Genetics, Wellcome Sanger Institute, Cambridge CB10 1SA, UK
| | - Emanuele Di Angelantonio
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB2 0BB, UK (E.D.A.)
- British Heart Foundation Centre of Research Excellence, University of Cambridge, Cambridge CB2 0BB, UK
- National Institute for Health and Care Research Blood and Transplant Research Unit in Donor Health and Behaviour, University of Cambridge, Cambridge CB2 0BB, UK
- Health Data Research UK Cambridge, Wellcome Genome Campus, University of Cambridge, Cambridge CB10 1SA, UK
- Health Data Science Research Centre, Human Technopole, 20157 Milan, Italy
| | - Simon J. Griffin
- Department of Public Health and Primary Care, University of Cambridge, Cambridge CB2 0BB, UK
- MRC Epidemiology Unit, School of Clinical Medicine, University of Cambridge, Cambridge CB2 0SL, UK
| | - Lisa Pennells
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB2 0BB, UK (E.D.A.)
| | - Angela M. Wood
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB2 0BB, UK (E.D.A.)
- British Heart Foundation Centre of Research Excellence, University of Cambridge, Cambridge CB2 0BB, UK
- National Institute for Health and Care Research Blood and Transplant Research Unit in Donor Health and Behaviour, University of Cambridge, Cambridge CB2 0BB, UK
- Health Data Research UK Cambridge, Wellcome Genome Campus, University of Cambridge, Cambridge CB10 1SA, UK
- The Alan Turing Institute, London NW1 2DB, UK
- Medical Research Council Biostatistics Unit, Cambridge Institute of Public Health, University of Cambridge, Cambridge CB2 0SR, UK
| | - Mohd Fairulnizal Md Noh
- Nutrition, Metabolic and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health Malaysia, Shah Alam 40170, Malaysia; (S.R.I.)
| | - Shamsul Azhar Shah
- Department of Community Health, Faculty of Medicine, National University of Malaysia, Kuala Lumpur 56000, Malaysia
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25
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Ma C, Wang Z, Ma Z, Ma P, Dai S, Wang N, Yang Y, Li G, Gao L, Xia Y, Xiao X, Dong Y. The feasibility and safety of his-purkinje conduction system pacing in patients with heart failure with severely reduced ejection fraction. Front Cardiovasc Med 2023; 10:1187169. [PMID: 37283576 PMCID: PMC10239933 DOI: 10.3389/fcvm.2023.1187169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 05/05/2023] [Indexed: 06/08/2023] Open
Abstract
Objective The purpose of this study was to evaluate the feasibility and outcomes of conduction system pacing (CSP) in patients with heart failure (HF) who had a severely reduced left ventricular ejection fraction (LVEF) of less than 30% (HFsrEF). Methods Between January 2018 and December 2020, all consecutive HF patients with LVEF < 30% who underwent CSP at our center were evaluated. Clinical outcomes and echocardiographic data [LVEF and left ventricular end-systolic volume (LVESV)], and complications were all recorded. In addition, clinical and echocardiographic (≥5% improvement in LVEF or ≥15% decrease in LVESV) responses were assessed. The patients were classified into a complete left bundle branch block (CLBBB) morphology group and a non-CLBBB morphology group according to the baseline QRS configuration. Results Seventy patients (66 ± 8.84 years; 55.7% male) with a mean LVEF of 23.2 ± 3.23%, LVEDd of 67.33 ± 7.47 mm and LVESV of 212.08 ± 39.74 ml were included. QRS configuration at baseline was CLBBB in 67.1% (47/70) of patients and non-CLBBB in 32.9%. At implantation, the CSP threshold was 0.6 ± 0.3 V @ 0.4 ms and remained stable during a mean follow-up of 23.43 ± 11.44 months. CSP resulted in significant LVEF improvement from 23.2 ± 3.23% to 34.93 ± 10.34% (P < 0.001) and significant QRS narrowing from 154.99 ± 34.42 to 130.81 ± 25.18 ms (P < 0.001). Clinical and echocardiographic responses were observed in 91.4% (64/70) and 77.1% (54/70) of patients. Super-response to CSP (≥15% improvement in LVEF or ≥30% decrease in LVESV) was observed in 52.9% (37/70) of patients. One patient died due to acute HF and following severe metabolic disorders. Baseline BNP (odds ratio: 0.969; 95% confidence interval: 0.939-0.989; P = 0.045) was associated with echocardiographic response. The proportions of clinical and echocardiographic responses in the CLBBB group were higher than those in the non-CLBBB group but without significant statistical differences. Conclusions CSP is feasible and safe in patients with HFsrEF. CSP is associated with a significant improvement in clinical and echocardiographic outcomes, even for patients with non-CLBBB widened QRS.
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Affiliation(s)
- Chengming Ma
- Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Zhongzhen Wang
- Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Zhulin Ma
- Department of Graduate School, Dalian Medical University, Dalian, China
| | - Peipei Ma
- Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Shiyu Dai
- Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Nan Wang
- Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Yiheng Yang
- Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Guocao Li
- Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Lianjun Gao
- Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Yunlong Xia
- Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Xianjie Xiao
- Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Yingxue Dong
- Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, China
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Morimoto Y, Morita H, Ejiri K, Mizuno T, Masuda T, Ueoka A, Asada S, Miyamoto M, Kawada S, Nakagawa K, Nishii N, Nakamura K, Ito H. Significant Delayed Activation on the Right Ventricular Outflow Tract Represents Complete Right Bundle-Branch Block Pattern in Brugada Syndrome. J Am Heart Assoc 2023; 12:e028706. [PMID: 37158059 DOI: 10.1161/jaha.122.028706] [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: 05/10/2023]
Abstract
Background The appearance of complete right bundle-branch block (CRBBB) in Brugada syndrome (BrS) is associated with an increased risk of ventricular fibrillation. The pathophysiological mechanism of CRBBB in patients with BrS has not been well established. We aimed to clarify the significance of a conduction delay zone associated with arrhythmias on CRBBB using body surface mapping in patients with BrS. Methods and Results Body surface mapping was recorded in 11 patients with BrS and 8 control patients both with CRBBB. CRBBB in control patients was transiently exhibited by unintentional catheter manipulation (proximal RBBB). Ventricular activation time maps were constructed for both of the groups. We divided the anterior chest into 4 areas (inferolateral right ventricle [RV], RV outflow tract [RVOT], intraventricular septum, and left ventricle) and compared activation patterns between the 2 groups. Excitation propagated to the RV from the left ventricle through the intraventricular septum with activation delay in the entire RV in the control group (proximal RBBB pattern). In 7 patients with BrS, excitation propagated from the inferolateral RV to the RVOT with significant regional activation delay. The remaining 4 patients with BrS showed a proximal RBBB pattern with the RVOT activation delay. The ventricular activation time in the inferolateral RV was significantly shorter in patients with BrS without a proximal RBBB pattern than in control patients. Conclusions The CRBBB morphology in patients with BrS consisted of 2 mechanisms: (1) significantly delayed conduction in the RVOT and (2) proximal RBBB with RVOT conduction delay. Significant RVOT conduction delay without proximal RBBB resulted in CRBBB morphology in patients with BrS.
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Affiliation(s)
- Yoshimasa Morimoto
- Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
- Department of Cardiovascular Medicine Fukuyama City Hospital Hiroshima Japan
| | - Hiroshi Morita
- Department of Cardiovascular Therapeutics Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Kentaro Ejiri
- Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
- Department of Epidemiology Johns Hopkins Bloomberg School of Public Health Baltimore MD USA
| | - Tomofumi Mizuno
- Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Takuro Masuda
- Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Akira Ueoka
- Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Saori Asada
- Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Masakazu Miyamoto
- Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Satoshi Kawada
- Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Koji Nakagawa
- Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Nobuhiro Nishii
- Department of Cardiovascular Therapeutics Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Kazufumi Nakamura
- Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Hiroshi Ito
- Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
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Morton MB, Morton JB, Mond HG. Aberrant Ventricular Conduction: Revisiting an Old Concept. Heart Lung Circ 2023; 32:555-566. [PMID: 36967303 DOI: 10.1016/j.hlc.2023.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 02/27/2023] [Accepted: 03/03/2023] [Indexed: 05/13/2023]
Abstract
The well-defined concept of aberrant ventricular conduction was introduced over 100 years ago and, despite advances in cardiac physiology and electrophysiologic testing, it is still widely misunderstood. Aberrant ventricular conduction is due to physiologic refractoriness of the His-Purkinje system and in most cases does not reflect underlying conduction system disease. Electrophysiologically, aberrant ventricular conduction can manifest with premature atrial ectopics, the Ashman phenomenon with atrial tachyarrhythmias, concealed conduction, echo beats and with the sinus mechanism including rate dependent bundle branch block, bradycardia dependent bundle branch block and early sinus beats. It is important to recognise aberrant ventricular conduction in the context of a broad complex tachycardia, as the differentiation between supraventricular tachyarrhythmias with aberrant ventricular conduction and ventricular tachyarrhythmias carry different therapeutic and prognostic implications. This review will define the ECG footprints of aberrant ventricular conduction to allow accurate ECG interpretation.
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Affiliation(s)
- Mathew B Morton
- CardioScan Pty Ltd, 293 Camberwell Rd, Melbourne, Vic, Australia
| | - Joseph B Morton
- Department of Cardiology, The Royal Melbourne Hospital and the Department of Medicine, University of Melbourne, Vic, Australia
| | - Harry G Mond
- CardioScan Pty Ltd, 293 Camberwell Rd, Melbourne, Vic, Australia; Department of Cardiology, The Royal Melbourne Hospital and the Department of Medicine, University of Melbourne, Vic, Australia.
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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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Teixeira RA, Fagundes AA, Baggio Junior JM, Oliveira JCD, Medeiros PDTJ, Valdigem BP, Teno LAC, Silva RT, Melo CSD, Elias Neto J, Moraes Júnior AV, Pedrosa AAA, Porto FM, Brito Júnior HLD, Souza TGSE, Mateos JCP, Moraes LGBD, Forno ARJD, D'Avila ALB, Cavaco DADM, Kuniyoshi RR, Pimentel M, Camanho LEM, Saad EB, Zimerman LI, Oliveira EB, Scanavacca MI, Martinelli Filho M, Lima CEBD, Peixoto GDL, Darrieux FCDC, Duarte JDOP, Galvão Filho SDS, Costa ERB, Mateo EIP, Melo SLD, Rodrigues TDR, Rocha EA, Hachul DT, Lorga Filho AM, Nishioka SAD, Gadelha EB, Costa R, Andrade VSD, Torres GG, Oliveira Neto NRD, Lucchese FA, Murad H, Wanderley Neto J, Brofman PRS, Almeida RMS, Leal JCF. Brazilian Guidelines for Cardiac Implantable Electronic Devices - 2023. Arq Bras Cardiol 2023; 120:e20220892. [PMID: 36700596 PMCID: PMC10389103 DOI: 10.36660/abc.20220892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Affiliation(s)
| | | | | | | | | | | | | | - Rodrigo Tavares Silva
- Universidade de Franca (UNIFRAN), Franca, SP - Brasil
- Centro Universitário Municipal de Franca (Uni-FACEF), Franca, SP - Brasil
| | | | - Jorge Elias Neto
- Universidade Federal do Espírito Santo (UFES), Vitória, ES - Brasil
| | - Antonio Vitor Moraes Júnior
- Santa Casa de Ribeirão Preto, Ribeirão Preto, SP - Brasil
- Unimed de Ribeirão Preto, Ribeirão Preto, SP - Brasil
| | - Anisio Alexandre Andrade Pedrosa
- Instituto do Coração (Incor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
| | | | | | | | | | - Luis Gustavo Belo de Moraes
- Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ - Brasil
| | | | | | | | | | - Mauricio Pimentel
- Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS - Brasil
| | | | - Eduardo Benchimol Saad
- Hospital Pró-Cardíaco, Rio de Janeiro, RJ - Brasil
- Hospital Samaritano, Rio de Janeiro, RJ - Brasil
| | | | | | - Mauricio Ibrahim Scanavacca
- Instituto do Coração (Incor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
| | - Martino Martinelli Filho
- Instituto do Coração (Incor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
| | - Carlos Eduardo Batista de Lima
- Hospital Universitário da Universidade Federal do Piauí (UFPI), Teresina, PI - Brasil
- Empresa Brasileira de Serviços Hospitalares (EBSERH), Brasília, DF - Brasil
| | | | - Francisco Carlos da Costa Darrieux
- Instituto do Coração (Incor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
| | | | | | | | | | - Sissy Lara De Melo
- Instituto do Coração (Incor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
| | | | - Eduardo Arrais Rocha
- Hospital Universitário Walter Cantídio, Universidade Federal do Ceará (UFC), Fortaleza, CE - Brasil
| | - Denise Tessariol Hachul
- Instituto do Coração (Incor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
| | | | - Silvana Angelina D'Orio Nishioka
- Instituto do Coração (Incor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
| | | | - Roberto Costa
- Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
| | | | - Gustavo Gomes Torres
- Hospital Universitário Onofre Lopes, Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN - Brasil
| | | | | | - Henrique Murad
- Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ - Brasil
| | | | | | - Rui M S Almeida
- Centro Universitário Fundação Assis Gurgacz, Cascavel, PR - Brasil
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Zhang J, Zhang Y, Sun Y, Chen M, Wang Z, Ma C. Success rates, challenges and troubleshooting of left bundle branch area pacing as a cardiac resynchronization therapy for treating patients with heart failure. Front Cardiovasc Med 2023; 9:1062372. [PMID: 36704478 PMCID: PMC9872722 DOI: 10.3389/fcvm.2022.1062372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 11/28/2022] [Indexed: 01/11/2023] Open
Abstract
Cardiac resynchronization therapy (CRT) is an important treatment of heart failure patients with reduced left ventricular ejection fraction (LVEF) and asynchrony of cardiac electromechanical activity. Left bundle branch area pacing (LBBaP) is a novel physiological pacing modality that appears to be an effective method for CRT. LBBaP has several advantages over the traditional biventricular-CRT (BiV-CRT), including a low and stable pacing capture threshold, a high success rate of implantation, a short learning curve, and high economic feasibility. However, LBBaP is not suitable for all heart failure patients needing a CRT and the success rates of LBBaP in heart failure patients is lower because of myocardial fibrosis, non-specific intraventricular conduction disturbance (IVCD), enlargement of the right atrium or right ventricle, etc. In this literature review, we summarize the success rates, challenges, and troubleshooting of LBBaP in heart failure patients needing a CRT.
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Affiliation(s)
- Junmeng Zhang
- Department of Cardiology, Beijing Huaxin Hospital, Tsinghua University, Beijing, China
| | - Yimin Zhang
- Department of Cardiology, Beijing Huaxin Hospital, Tsinghua University, Beijing, China
| | - Yaxun Sun
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Mengna Chen
- Department of Cardiology, Beijing Huaxin Hospital, Tsinghua University, Beijing, China
| | - Zefeng Wang
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Changsheng Ma
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
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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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Impact of left bundle branch block in Takotsubo Syndrome. IJC HEART & VASCULATURE 2022; 43:101123. [PMID: 36176307 PMCID: PMC9513099 DOI: 10.1016/j.ijcha.2022.101123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 08/25/2022] [Accepted: 09/08/2022] [Indexed: 11/24/2022]
Abstract
Background Left bundle branch block (LBBB) causes left ventricular dyssynchrony, and its presence with concomitant left ventricular dysfunction has been proven to play a synergistic role, worsening ventricular function. Our study seeks to further explore the association between LBBB and various in-hospital outcomes in patients with takotsubo syndrome (TTS). Methods The national inpatient sample was queried from 2016 to 2019 to identify all admissions with a primary diagnosis of TTS. International classification of diseases, tenth revision codes were used to divide patients based on the presence or absence of LBBB. Multivariate regression analysis was performed to assess the effect of LBBB among all the pre-specified outcomes. Results A total of 26,615 admissions were included in the analysis. Admissions with LBBB were more likely to be older (72.2 vs. 66.2 years) and have a higher burden of comorbidities. The presence of a LBBB was associated with ventricular arrhythmias (OR = 1.97, 95% CI 1.08–3.61, p = 0.028) but not with sudden cardiac arrest (SCA), acute heart failure, cardiogenic shock, and all-cause intra-hospital mortality. Conclusions Intraventricular dyssynchrony appears to play a significant role in ventricular arrhythmogenesis and SCA, as several trials have demonstrated that cardiac resynchronization therapy alone without defibrillator function reduces the rate of ventricular arrhythmias and SCA in patients with heart failure with systolic dysfunction and a widened QRS complex. The most likely mechanism of arrhythmia development in TTS is related to the elevated plasma levels of catecholamines and their proarrhythmic effects in the ventricular myocardium.
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Fu Y, Liu P, Jin L, Li Y, Zhang Y, Qin X, Zheng Q. Left bundle branch area pacing: A promising modality for cardiac resynchronization therapy. Front Cardiovasc Med 2022; 9:901046. [PMID: 36465440 PMCID: PMC9715961 DOI: 10.3389/fcvm.2022.901046] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 10/31/2022] [Indexed: 12/19/2023] Open
Abstract
Cardiac resynchronization therapy (CRT) is recognized as the first-line management for patients with heart failure (HF) and conduction disorders. As a conventional mode for delivering CRT, biventricular pacing (BVP) improves cardiac function and reduces HF hospitalizations and mortality, but there are still limitations given the high incidence of a lack of response rates. Alternative pacing methods are needed either for primary or rescue therapy. In recent years, conduction system pacing (CSP) has emerged as a more physiological pacing modality for simultaneous stimulation of the ventricles, including His bundle pacing (HBP) and left bundle branch pacing (LBBP). CSP activates the His-Purkinje system, allowing normal ventricular stimulation. However, HBP is technically challenging with a relatively low success rate, high pacing threshold, and failure to correct distal conduction abnormalities. Therefore, LBBP stands out as a novel ideal physiological pacing modality for CRT. Several non-randomized studies compared the feasibility and safety of LBBP with BVP and concluded that LBBP is superior to BVP for delivering CRT with a narrower QRS and greater improvements in left ventricular ejection fraction (LVEF) and New York Heart Association (NYHA) functional class. Concurrently, some studies showed lower and stable pacing thresholds and greater improvement of B-type natriuretic peptide (BNP) levels, as well as better mechanical synchronization and efficiency. LBBP ensures better ventricular electromechanical resynchronization than BVP. In this review, we discuss current knowledge of LBBP, compare LBBP with BVP, and explore the potential of LBBP to serve as an alternative primary therapy to realize cardiac resynchronization.
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Affiliation(s)
- Yuping Fu
- Department of Cardiology, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Peng Liu
- Department of Cardiology, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Lingyan Jin
- Department of Cardiology, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Yingqi Li
- Department of Cardiology, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Yudi Zhang
- Department of Cardiology, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Xinghua Qin
- School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi, China
| | - Qiangsun Zheng
- Department of Cardiology, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Samesima N, God EG, Kruse JCL, Leal MG, Pinho C, França FFDAC, Pimenta J, Cardoso AF, Paixão A, Fonseca A, Pérez-Riera AR, Ribeiro ALP, Madaloso BA, Luna Filho B, Oliveira CARD, Grupi CJ, Moreira DAR, Kaiser E, Paixão GMDM, Feitosa Filho G, Pereira Filho HG, Grindler J, Aziz JL, Molina MS, Facin M, Tobias NMMDO, Oliveira PAD, Sanches PCR, Teixeira RA, Atanes SM, Pastore CA. Brazilian Society of Cardiology Guidelines on the Analysis and Issuance of Electrocardiographic Reports - 2022. Arq Bras Cardiol 2022; 119:638-680. [PMID: 36287420 PMCID: PMC9563889 DOI: 10.36660/abc.20220623] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
- Nelson Samesima
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | | | | | | | - Claudio Pinho
- Pontifícia Universidade Católida (PUC), Campinas , SP - Brasil
- Clínica Pinho , Valinhos , SP - Brasil
| | | | - João Pimenta
- Hospital do Servidor Público Estadual , São Paulo , SP - Brasil
| | - Acácio Fernandes Cardoso
- Serviço de Eletrocardiologia do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | - Adail Paixão
- Hospital Unimec , Vitória Da Conquista , BA - Brasil
| | - Alfredo Fonseca
- Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | | | | | - Bruna Affonso Madaloso
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | - Bráulio Luna Filho
- Hospital São Paulo , Universidade Federal de São Paulo (UNIFESP), São Paulo , SP - Brasil
| | | | - César José Grupi
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | | | - Elisabeth Kaiser
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | | | | | - Horacio Gomes Pereira Filho
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | - José Grindler
- Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | - José Luiz Aziz
- Faculdade de Medicina do ABC , Santo André , SP - Brasil
| | | | - Mirella Facin
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | - Nancy M M de Oliveira Tobias
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | - Patricia Alves de Oliveira
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | | | - Ricardo Alkmin Teixeira
- Hospital Renascentista , Pouso Alegre , MG - Brasil
- Faculdade de Medicina da Universidade do Vale do Sapucaí (UNIVÁS), Pouso Alegre , MG - Brasil
| | | | - Carlos Alberto Pastore
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
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Healing the Broken Hearts: A Glimpse on Next Generation Therapeutics. HEARTS 2022. [DOI: 10.3390/hearts3040013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Cardiovascular diseases are the leading cause of death worldwide, accounting for 32% of deaths globally and thus representing almost 18 million people according to WHO. Myocardial infarction, the most prevalent adult cardiovascular pathology, affects over half a million people in the USA according to the last records of the AHA. However, not only adult cardiovascular diseases are the most frequent diseases in adulthood, but congenital heart diseases also affect 0.8–1.2% of all births, accounting for mild developmental defects such as atrial septal defects to life-threatening pathologies such as tetralogy of Fallot or permanent common trunk that, if not surgically corrected in early postnatal days, they are incompatible with life. Therefore, both congenital and adult cardiovascular diseases represent an enormous social and economic burden that invariably demands continuous efforts to understand the causes of such cardiovascular defects and develop innovative strategies to correct and/or palliate them. In the next paragraphs, we aim to briefly account for our current understanding of the cellular bases of both congenital and adult cardiovascular diseases, providing a perspective of the plausible lines of action that might eventually result in increasing our understanding of cardiovascular diseases. This analysis will come out with the building blocks for designing novel and innovative therapeutic approaches to healing the broken hearts.
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Incidence of persistent left bundle branch block after rapid-deployment aortic valve replacement. Ann Thorac Surg 2022; 115:1446-1454. [PMID: 35952857 DOI: 10.1016/j.athoracsur.2022.07.038] [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] [Received: 10/23/2021] [Revised: 06/24/2022] [Accepted: 07/19/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND We aimed to evaluate the incidence, prognosis and predictive factors of new onset of persistent left bundle branch block(NOP-LBBB) after rapid-deployment aortic valve replacement(RD-AVR). METHODS This study was an observational, retrospective, single-center study of 274 consecutive patients with no baseline ventricular conduction disorder and no previous permanent pacemaker implantation(PPI) who underwent RD-AVR with an INTUITY valve(n=55) and INTUITY Elite Valve(n=219). Twelve-lead electrocardiography and transthoracic echocardiography were performed preoperatively, upon discharge, at 1-month and 1-year intervals. The incidence, prognosis, and predictive factors of NOP-LBBB were evaluated. RESULTS NOP-LBBB occurred in 58 patients(21.2%) upon discharge. In multivariate analysis, age (p <0.01), Intuity valve diameter ≥ 23 mm (p = 0.02) and INTUITY ELITE implantation(p=0.01) were independent predictors of NOP-LBBB. By 1:1 propensity matching analysis between the NOP-LBBB group and the control group, there were no significant differences in one-year overall mortality(p=0.23), hospitalization for CHF(p=0.99) or PPI(p=0.99). NOP-LBBB exposed patients to a high rate of dysrhythmic events(12.1%vs.1.4%,p<0.01) and was associated with a significant decrease in LVEF (62±9.5% vs. 65.2±7.83%, p=0.02) without an impact on NYHA functional status(1.25±0.32 and 1.52±0.70,p=0.32). Seventeen patients(6.2%) had a PPI before discharge, including 14 NOP-LBBB patients. CONCLUSIONS NOP-LBBB after RD-AVR is prevalent in patients with no prior conduction disorders. INTUITY ELITE is associated with a significantly higher rate of NOP-LBBB. The persistence of NOP-LBBB predisposed patients to the occurrence of high-grade conduction disorders and might have led to PPI but did not increase mortality or hospitalization for CHF.
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Peng ML, Fu Y, Zhang Y, Wu CW, Ren H, Zhou SS. Recovery of complete left bundle branch block in a dilated cardiomyopathy patient after treatment with sacubitril/valsartan: A case report. Medicine (Baltimore) 2022; 101:e29330. [PMID: 35801756 PMCID: PMC9259124 DOI: 10.1097/md.0000000000029330] [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] [Indexed: 01/04/2023] Open
Abstract
RATIONALE The treatment of dilated cardiomyopathy (DCM) has recently been greatly improved, especially with the widespread use of sacubitril/valsartan (ARNI) combination therapy. We know that ARNI-like drugs can significantly improve the symptoms of heart failure with reducing ejection fraction. However, clinical studies evaluating the safety and efficacy of ARNI in DCM-associated arrhythmia are limited, and whether individuals with arrhythmia would benefit from ARNI remains controversial. In this case, we report a patient with complete left bundle branch block (CLBBB) associated with DCM whose CLBBB returned to normal after treatment with ARNI. PATIENT CONCERNS A 38-year-old man was admitted to the hospital for 20 days for idiopathic paroxysmal dyspnea. He presented with exacerbated dyspnea symptoms at night, accompanied by cough and sputum. DIAGNOSIS Physical examination revealed a grade 4/6 systolic murmur could be heard in the apical area of the heart and mild edema was present in both lower limbs. Laboratory examination found that the B-type natriuretic peptide was significantly increased. Echocardiography indicated left atrial internal diameter, right ventricular internal diameter, and left ventricular diastolic diameter were enlarged and ejection fraction was significantly decreased. Besides, the pulsation of the wall was diffusely attenuated. Electrocardiogram was suggestive of tachycardia and CLBBB. A diagnosis of DCM with CLBBB was considered based on a comprehensive evaluation of the physical examination, laboratory examination, echocardiography and electrocardiogram. INTERVENTIONS The patient was treated with ARNI at a dose of 50 mg (twice a day) at first, gradually increasing to the target dose (200 mg, twice a day) in the following 9 months as shown in Table 1, along with metoprolol 25 mg (once a day [qd]), diuretics 20 mg (qd), and aldosterone 20 mg (qd). OUTCOMES After treatment with ARNI during the 9-month follow-up, the patient's symptoms improved, and CLBBB returned to normal. LESSONS Clinical studies evaluating the safety and efficacy of ARNI in DCM-associated arrhythmia are limited, and whether individuals with arrhythmia would benefit from ARNI remains controversial. This report will help to instruct the clinical treatment of DCM patients with CLBBB and the potential application of ARNI.
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Affiliation(s)
- Meng-Ling Peng
- Department of Cardiology, The First Hospital of Jilin University, Chaoyang District, Changchun, People’s Republic of China
| | - Yu Fu
- Department of Cardiology, The First Hospital of Jilin University, Chaoyang District, Changchun, People’s Republic of China
| | - Ying Zhang
- Department of Cardiology, The First Hospital of Jilin University, Chaoyang District, Changchun, People’s Republic of China
| | - Chu-Wen Wu
- Department of Cardiology, The First Hospital of Jilin University, Chaoyang District, Changchun, People’s Republic of China
| | - Hang Ren
- Department of Cardiology, The Second Hospital of Jilin University, Changchun, People’s Republic of China
| | - Shan-Shan Zhou
- Department of Cardiology, The First Hospital of Jilin University, Chaoyang District, Changchun, People’s Republic of China
- *Correspondence: Shan-Shan Zhou, The First Hospital of Jilin University, No. 1 Xinmin Street, Chaoyang District, Changchun 130021, People’s Republic of China (e-mail: )
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The derivation and validation of the Manchester Acute Coronary Syndrome Electrocardiograph model for the identification of non-ST-elevation myocardial ischaemia in the Emergency Department. Am J Emerg Med 2022; 57:27-33. [DOI: 10.1016/j.ajem.2022.04.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 04/07/2022] [Accepted: 04/11/2022] [Indexed: 11/22/2022] Open
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Rueda C, Fernández I, Larriba Y, Rodríguez-Collado A, Canedo C. Compelling new electrocardiographic markers for automatic diagnosis. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2022; 221:106807. [PMID: 35525215 DOI: 10.1016/j.cmpb.2022.106807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 03/23/2022] [Accepted: 04/07/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND AND OBJECTIVE The automatic diagnosis of heart diseases from the electrocardiogram (ECG) signal is crucial in clinical decision-making. However, the use of computer-based decision rules in clinical practice is still deficient, mainly due to their complexity and a lack of medical interpretation. The objetive of this research is to address these issues by providing valuable diagnostic rules that can be easily implemented in clinical practice. In this research, efficient diagnostic rules friendly in clinical practice are provided. METHODS In this paper, interesting parameters obtained from the ECG signals analysis are presented and two simple rules for automatic diagnosis of Bundle Branch Blocks are defined using new markers derived from the so-called FMMecg delineator. The main advantages of these markers are the good statistical properties and their clear interpretation in clinically meaningful terms. RESULTS High sensitivity and specificity values have been obtained using the proposed rules with data from more than 35,000 patients from well known benchmarking databases. In particular, to identify Complete Left Bundle Branch Blocks and differentiate this condition from subjects without heart diseases, sensitivity and specificity values ranging from 93% to 99% and from 96% to 99%, respectively. The new markers and the automatic diagnosis are easily available at https://fmmmodel.shinyapps.io/fmmEcg/, an app specifically developed for any given ECG signal. CONCLUSIONS The proposal is different from others in the literature and it is compelling for three main reasons. On the one hand, the markers have a concise electrocardiographic interpretation. On the other hand, the diagnosis rules have a very high accuracy. Finally, the markers can be provided by any device that registers the ECG signal and the automatic diagnosis is made straightforwardly, in contrast to the black-box and deep learning algorithms.
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Affiliation(s)
- Cristina Rueda
- Department of Statistics and Operations Research, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain.
| | - Itziar Fernández
- Department of Statistics and Operations Research, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
| | - Yolanda Larriba
- Department of Statistics and Operations Research, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
| | - Alejandro Rodríguez-Collado
- Department of Statistics and Operations Research, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
| | - Christian Canedo
- Department of Statistics and Operations Research, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
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Weferling M, Rolf A, Fischer-Rasokat U, Liebetrau C, Renker M, Choi YH, Hamm CW, Dey D, Kim WK. Epicardial fat volume is associated with preexisting atrioventricular conduction abnormalities and increased pacemaker implantation rate in patients undergoing transcatheter aortic valve implantation. Int J Cardiovasc Imaging 2022; 38:1399-1406. [PMID: 34954805 PMCID: PMC11143016 DOI: 10.1007/s10554-021-02502-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 12/19/2021] [Indexed: 11/30/2022]
Abstract
Epicardial fat tissue (EFT) is a highly metabolically active fat depot surrounding the heart and coronary arteries that is related to early atherosclerosis and adverse cardiac events. We aimed to investigate the relationship between the amount of EFT and preexisting cardiac conduction abnormalities (CCAs) and the need for new postinterventional pacemaker in patients with severe aortic stenosis planned for transcatheter aortic valve implantation (TAVI). A total of 560 consecutive patients (54% female) scheduled for TAVI were included in this retrospective study. EFT volume was measured via a fully automated artificial intelligence software (QFAT) using computed tomography (CT) performed before TAVI. Baseline CCAs [first-degree atrioventricular (AV) block, right bundle branch block (RBBB), and left bundle branch block (LBBB)] were diagnosed according to 12-lead ECG before TAVI. Aortic valve calcification was determined by the Agatston score assessed in the pre-TAVI CT. The median EFT volume was 129.5 ml [IQR 94-170]. Baseline first-degree AV block was present in 17%, RBBB in 10.4%, and LBBB in 10.2% of the overall cohort. In adjusted logistic regression analysis, higher EFT volume was associated with first-degree AV block (OR 1.006 [95% CI 1.002-1.010]; p = 0.006) and the need for new pacemaker implantation after TAVI (OR 1.005 [95% CI 1.0-1.01]; p = 0.035) but not with the presence of RBBB or LBBB. EFT volume did not correlate with the Agatston score of the aortic valve. Greater EFT volume is associated independently with preexisting first-degree AV block and new pacemaker implantation in patients undergoing TAVI. It may play a causative role in degenerative processes and the susceptibility of the AV conduction system.
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Affiliation(s)
- Maren Weferling
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Benekestr. 2-8, 61231, Bad Nauheim, Germany.
- German Centre for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt, Germany.
| | - Andreas Rolf
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Benekestr. 2-8, 61231, Bad Nauheim, Germany
| | - Ulrich Fischer-Rasokat
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Benekestr. 2-8, 61231, Bad Nauheim, Germany
| | - Christoph Liebetrau
- Cardioangiological Center Bethanien (CCB), Department of Cardiology, Agaplesion Bethanien Hospital, Frankfurt, Germany
| | - Matthias Renker
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Benekestr. 2-8, 61231, Bad Nauheim, Germany
- Department of Cardiac Surgery, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
| | - Yeoung-Hoon Choi
- Department of Cardiac Surgery, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
| | - Christian W Hamm
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Benekestr. 2-8, 61231, Bad Nauheim, Germany
- German Centre for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt, Germany
- Department of Cardiology, University Hospital of Giessen, Giessen, Germany
| | - Damini Dey
- Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Taper A238, Los Angeles, CA, 90048, USA
| | - Won-Keun Kim
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Benekestr. 2-8, 61231, Bad Nauheim, Germany
- German Centre for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt, Germany
- Department of Cardiac Surgery, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
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Schmitz T, Wein B, Methe H, Linseisen J, Heier M, Peters A, Meisinger C. Association between admission ECG changes and long-term mortality in patients with an incidental myocardial infarction: Results from the KORA myocardial infarction registry. Eur J Intern Med 2022; 100:69-76. [PMID: 35317964 DOI: 10.1016/j.ejim.2022.03.009] [Citation(s) in RCA: 1] [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: 02/01/2022] [Revised: 03/01/2022] [Accepted: 03/08/2022] [Indexed: 12/17/2022]
Abstract
BACKGROUND The aim of this study was to examine the predictive value of specific changes in admission ECG on long-term outcome in acute myocardial infarction (AMI). METHODS From 2000 until 2017 all AMI cases (n = 9,689) in the study area of Augsburg, Germany, were prospectively recorded. For this study, all patients with a first-time AMI, who survived the first 28 days, were considered. Median observational time was 6.7 years (IQR: 3.6-10.9). Each case was assigned to one of the following groups according to the admission ECG: 'ST-segment elevation', 'ST-segment depression', 'T-wave inversion', 'unspecific changes', 'normal ECG' and 'bundle branch block' (BBB). Multivariable adjusted COX regression models were calculated to compare long-term all-cause mortality. RESULTS The final regression model revealed a significantly higher mortality among patients with BBB (HR: 1.52 [1.34-1.73], p-value: < 0.001) and 'ST-segment depression' (HR: 1.16 [1.03-1.29], p-value: 0.01252) compared to the STEMI group (reference group). The 'normal ECG' group (HR: 0.76 [0.66-0.87], p-value: < 0.001) on the other hand was associated with significantly lower long-term mortality. The 'T-wave inversion' group (HR: 1.08 [0.96-1.21]) and the 'unspecific changes' group (HR: 1.05 [0.94-1.17]) did not differ significantly from the STEMI group. CONCLUSION ST-segment depressions and BBB admission ECGs go along with higher long-term mortality in AMI patients compared to STEMI cases. This should be taken into account by physicians when treating patients with NSTEMIs. Only the complete absence of AMI-related ECG changes predicts a more favorable outcome.
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Affiliation(s)
- Timo Schmitz
- Chair of Epidemiology, University of Augsburg, University Hospital Augsburg, Stenglinstraße 2, 86156 Augsburg, Germany.
| | - Bastian Wein
- Department of Cardiology, University Hospital of Augsburg, Germany
| | - Heiko Methe
- Department of Cardiology, Kliniken an der Paar, Krankenhaus Aichach, Aichach, Germany
| | - Jakob Linseisen
- Chair of Epidemiology, University of Augsburg, University Hospital Augsburg, Stenglinstraße 2, 86156 Augsburg, Germany; IRG Clinical Epidemiology, Helmholtz Zentrum München, Germany
| | - Margit Heier
- KORA Study Centre, University Hospital of Augsburg, Germany; Institute of Epidemiology, Helmholtz Zentrum München, Germany
| | - Annette Peters
- Institute of Epidemiology, Helmholtz Zentrum München, Germany; German Center for Diabetes Research (DZD) Neuherberg, Germany
| | - Christa Meisinger
- Chair of Epidemiology, University of Augsburg, University Hospital Augsburg, Stenglinstraße 2, 86156 Augsburg, Germany
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Vigdor A, Bravo PE. Mechanical Dyssynchrony with Gated Myocardial Perfusion SPECT: Reproducibility is the Key. J Nucl Cardiol 2022; 29:962-964. [PMID: 33389642 DOI: 10.1007/s12350-020-02463-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 11/30/2020] [Indexed: 11/29/2022]
Affiliation(s)
- Aaron Vigdor
- Division of Cardiovascular Medicine, Department of Medicine, Hospital of the University of Pennsylvania, 3400 Civic Center Blvd, 11-154 South Pavilion, Philadelphia, PA, 19104, USA
| | - Paco E Bravo
- Division of Cardiovascular Medicine, Department of Medicine, Hospital of the University of Pennsylvania, 3400 Civic Center Blvd, 11-154 South Pavilion, Philadelphia, PA, 19104, USA.
- Division of Nuclear Medicine, Department of Radiology, Hospital of the University of Pennsylvania, 3400 Civic Center Blvd, 11-154 South Pavilion, Philadelphia, PA, 19104, USA.
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43
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Tavares CAM, Samesima N, Lazar Neto F, Hajjar LA, Godoy LC, Padrão EMH, Facin M, Jacob Filho W, Farkouh ME, Pastore CA. Usefulness of ECG criteria to rule out left ventricular hypertrophy in older individuals with true left bundle branch block: an observational study. BMC Cardiovasc Disord 2021; 21:547. [PMID: 34789151 PMCID: PMC8600759 DOI: 10.1186/s12872-021-02332-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 10/12/2021] [Indexed: 11/30/2022] Open
Abstract
Background Advanced age is associated with both left bundle branch block (LBBB) and hypertension and the usefulness of ECG criteria to detect left ventricular hypertrophy (LVH) in patients with LBBB is still unclear. The diagnostic performance and clinical applicability of ECG-based LVH criteria in patients with LBBB defined by stricter ECG criteria is unknown. The aim of this study was to compare diagnostic accuracy and clinical utility of ECG criteria in patients with advanced age and strict LBBB criteria. Methods Retrospective single-center study conducted from Jan/2017 to Mar/2018. Patients undergoing both ECG and echocardiogram examinations were included. Ten criteria for ECG-based LVH were compared using LVH defined by the echocardiogram as the gold standard. Sensitivity, specificity, predictive values, likelihood ratios, AUC, and the Brier score were used to compare diagnostic performance and a decision curve analysis was performed. Results From 4621 screened patients, 68 were included, median age was 78.4 years, (IQR 73.3–83.4), 73.5% with hypertension. All ECG criteria failed to provide accurate discrimination of LVH with AUC range between 0.54 and 0.67, and no ECG criteria had a balanced tradeoff between sensitivity and specificity. No ECG criteria consistently improved the net benefit compared to the strategy of performing routine echocardiogram in all patients in the decision curve analysis within the 10–60% probability threshold range. Conclusion ECG-based criteria for LVH in patients with advanced age and true LBBB lack diagnostic accuracy or clinical usefulness and should not be routinely assessed. Supplementary Information The online version contains supplementary material available at 10.1186/s12872-021-02332-8.
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Affiliation(s)
- Caio Assis Moura Tavares
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Nelson Samesima
- Unidade de Eletrocardiografia, Instituto do Coracao, Hospital das Clínicas, Faculdade de Medicina, Universidade de Sao Paulo, Av. Dr Enéas de Carvalho Aguiar, 44, andar AB, Sao Paulo, SP, 05403-900, Brazil
| | - Felippe Lazar Neto
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Ludhmila Abrahão Hajjar
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Lucas C Godoy
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil.,Peter Munk Cardiac Centre and Heart and Stroke/Richard Lewar Centre of Excellence in Cardiovascular Research, University of Toronto, Toronto, ON, Canada
| | - Eduardo Messias Hirano Padrão
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Mirella Facin
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Wilson Jacob Filho
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Michael E Farkouh
- Peter Munk Cardiac Centre and Heart and Stroke/Richard Lewar Centre of Excellence in Cardiovascular Research, University of Toronto, Toronto, ON, Canada
| | - Carlos Alberto Pastore
- Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil. .,Unidade de Eletrocardiografia, Instituto do Coracao, Hospital das Clínicas, Faculdade de Medicina, Universidade de Sao Paulo, Av. Dr Enéas de Carvalho Aguiar, 44, andar AB, Sao Paulo, SP, 05403-900, Brazil.
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44
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Left Bundle Branch Block: Characterization, Definitions, and Recent Insights into Conduction System Physiology. Card Electrophysiol Clin 2021; 13:671-684. [PMID: 34689894 DOI: 10.1016/j.ccep.2021.07.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Left bundle branch block (LBBB) is not just a simple electrocardiogram alteration. The intricacies of this general terminology go beyond simple conduction block. This review puts together current knowledge on the historical concept of LBBB, clinical significance, and recent insights into the pathophysiology of human LBBB. LBBB is an entity that affects patient diagnosis (primary conduction disease, secondary to underlying pathology or iatrogenic), treatment (cardiac resynchronization therapy or conduction system pacing for heart failure), and prognosis. Recruiting the left bundle branch with conduction system pacing depends on the complex interaction between anatomy, site of pathophysiology, and delivery tools.
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45
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Qu Q, Sun JY, Zhang ZY, Kan JY, Wu LD, Li F, Wang RX. His-Purkinje conduction system pacing: A systematic review and network meta-analysis in bradycardia and conduction disorders. J Cardiovasc Electrophysiol 2021; 32:3245-3258. [PMID: 34664764 DOI: 10.1111/jce.15269] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 09/28/2021] [Accepted: 10/05/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND His-Purkinje conduction system pacing (HPCSP) has emerged as an effective alternative to overcome the limitations of right ventricular pacing (RVP) via physiological left ventricular activation, but there remains a paucity of comparative information for His bundle pacing (HBP) and left bundle branch pacing (LBBP). METHODS A Bayesian random-effects network analysis was conducted to compare the relative effects of HBP, LBBP, and RVP in patients with bradycardia and conduction disorders. PubMed, Embase, Cochrane Library, and Web of Science were systematically searched from database inception until September 21, 2021. RESULTS Twenty-eight studies involving 4160 patients were included in this meta-analysis. LBBP significantly improved success rate, pacing threshold, pacing impedance, and R-wave amplitude compared with HBP. LBBP also demonstrated a nonsignificant trend towards superior outcomes of lead complications, heart failure hospitalization, atrial fibrillation, and all-cause death. However, HBP was associated with significantly shorter paced QRS duration relative to LBBP. Despite higher success rates, shorter procedure/fluoroscopy duration, and fewer lead complications, patients receiving RVP were more likely to experience reduced left ventricular ejection fraction, longer paced QRS duration, and higher rates of heart failure hospitalization than those receiving HPCSP. No statistical differences were observed in the remaining outcome measures. CONCLUSIONS This network meta-analysis demonstrates the efficacy and safety of HPCSP for the treatment of bradycardia and conduction disorders, with differences in pacing parameters, electrophysiology characteristics, and clinical outcomes between HBP and LBBP. Larger-scale, long-term comparative studies are warranted for further verification.
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Affiliation(s)
- Qiang Qu
- Department of Cardiology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China.,Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jin-Yu Sun
- Department of Cardiology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China.,Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Zhen-Ye Zhang
- Department of Cardiology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Jun-Yan Kan
- Department of Cardiology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Li-Da Wu
- Department of Cardiology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Feng Li
- Department of Cardiology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Ru-Xing Wang
- Department of Cardiology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
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Schiedat F, Mijic D, Karosiene Z, Bogossian H, Zarse M, Lemke B, Hanefeld C, Mügge A, Kloppe A. Improvement of electrical synchrony in cardiac resynchronization therapy using dynamic atrioventricular delay programming and multipoint pacing. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2021; 44:1963-1971. [PMID: 34586643 DOI: 10.1111/pace.14372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 09/06/2021] [Accepted: 09/26/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Optimization of cardiac resynchronization therapy (CRT) is often time-consuming and therefore underused in a clinical setting. Novel device-based algorithms aiming to simplify optimization include a dynamic atrioventricular delay (AVD) algorithm (SyncAV, Abbott) and multipoint pacing (MPP, Abbott). This study examines the acute effect of SyncAV and MPP on electrical synchrony in patients with newly and chronically implanted CRT devices. METHODS Patients with SyncAV and MPP enabled devices were prospectively enrolled during implant or scheduled follow-up. Blinded 12-lead electrocardiographic acute measurements of QRS duration (QRSd) were performed for intrinsic QRSd (Intrinsic), bi-ventricular pacing (BiV), MPP, BiV with SyncAV at default offset 50 ms (BiVSyncAVdef ), BiV with SyncAV at patient-specific optimised offset (BiVSyncAVopt ), MPP with SyncAV at default offset 50 ms (MPPSyncAVdef ), and MPP with SyncAV at patient-specific optimised offset (MPPSyncAVopt ). RESULTS Thirty-three patients were enrolled. QRSd for Intrinsic, BiV, MPP, BiVSyncAVdef , BiVSyncAVopt , MPPSyncAVdef , MPPSyncAVopt were 160.4 ± 20.6 ms, 141.0 ± 20.5 ms, 130.2 ± 17.2 ms, 121.7 ± 20.9 ms, 117.0 ± 19.0 ms, 121.2 ± 17.1 ms, 108.7 ± 16.5 ms respectively. MPPSyncAVopt led to greatest reduction of QRSd relative to Intrinsic (-31.6 ± 11.1%; p < .001), showed significantly shorter QRSd compared to all other pacing configurations (p < .001) and shortest QRSd in every patient. Shortening of QRSd was not significantly different between newly and chronically implanted devices (-51.6 ± 14.7 ms vs. -52.7 ± 21.9 ms; p = .99). CONCLUSION SyncAV and MPP improved acute electrical synchrony in CRT. Combining both technologies with patient-specific optimization resulted in greatest improvement, regardless of time since implantation. Whats new Novel device-based algorithms like a dynamic AVD algorithm (SyncAV, Abbott) and multipoint pacing (MPP, Abbott) aim to simplify CRT optimization. Our data show that a combination of patient tailored SyncAV optimization and MPP results in greatest improvement of electrical synchrony in CRT measured by QRS duration, regardless if programmed in newly or chronically implanted devices. This is the first study to our knowledge to examine a combination of these device-based algorithms. The results help understanding the ideal ventricular excitation in heart failure.
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Affiliation(s)
- Fabian Schiedat
- Department of Cardiology and Angiology at University Hospital Bergmannsheil Bochum of the Ruhr-University Bochum, Bochum, Germany.,Department of Cardiology and Angiology at Marienhospital Gelsenkirchen, Germany
| | - Dejan Mijic
- Practice for Cardiology and Cardiac Surgery, Wuppertal, Germany
| | - Zana Karosiene
- Department of Cardiology, Electrophysiology and Angiology, Klinikum, Luedenscheid, Germany
| | - Harilaos Bogossian
- Department of Cardiology, Electrophysiology and Angiology, Klinikum, Luedenscheid, Germany.,University of Witten/Herdecke, Witten, Germany
| | - Markus Zarse
- Department of Cardiology, Electrophysiology and Angiology, Klinikum, Luedenscheid, Germany
| | - Bernd Lemke
- Department of Cardiology, Electrophysiology and Angiology, Klinikum, Luedenscheid, Germany
| | - Christoph Hanefeld
- Department of Internal Medicine at Elisabeth Krankenhaus Bochum of the Ruhr University, Bochum, Germany
| | - Andreas Mügge
- Department of Cardiology and Angiology at University Hospital Bergmannsheil Bochum of the Ruhr-University Bochum, Bochum, Germany
| | - Axel Kloppe
- Department of Cardiology and Angiology at Marienhospital Gelsenkirchen, Germany
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47
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Saad SM, Polani FS, LeLorier P. A Case of Intermittent Left Bundle Branch Block. Cureus 2021; 13:e15851. [PMID: 34189004 PMCID: PMC8232976 DOI: 10.7759/cureus.15851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
An 82-year-old woman with uncontrolled hypertension and occasional exertional dyspnea was found to be in intermittent left bundle branch block (LBBB). Her laboratory results, echocardiogram, and ischemic workup were unremarkable. This case highlights that intermittent LBBB is not always associated with coronary ischemia, vasospasm, blunt cardiac injury, drugs, and high catecholaminergic or inflammatory states.
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Affiliation(s)
- Syed M Saad
- Cardiology, Louisiana State University Health Sciences Center, New Orleans, USA
| | - Faran S Polani
- Hematology and Oncology, Washington University School of Medicine, Saint Louis, USA
| | - Paul LeLorier
- Cardiology, Louisiana State University Health Sciences Center, New Orleans, USA
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48
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His Bundle Pacing in Congenital Complete Heart Block: Making HIStory? JACC Clin Electrophysiol 2021; 7:530-532. [PMID: 33888270 DOI: 10.1016/j.jacep.2020.12.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 12/11/2020] [Indexed: 11/21/2022]
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49
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Peng X, Chen Y, Wang X, Hu A, Li X. Safety and efficacy of His-bundle pacing/left bundle branch area pacing versus right ventricular pacing: a systematic review and meta-analysis. J Interv Card Electrophysiol 2021; 62:445-459. [PMID: 34019186 DOI: 10.1007/s10840-021-00998-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 04/15/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Recent studies have demonstrated that right ventricular pacing (RVP) has deleterious effects on non-synchronized ventricular contraction, while His-bundle pacing (HBP) or left bundle branch area pacing (LBBaP) contribute to improvements in patients' mid- and long-term outcomes. This meta-analysis aimed to compare the safety and efficacy of physiologic pacing (HBP/LBBaP) versus those of RVP. METHODS A systematic search of PubMed, Cochrane Library, and Embase was conducted for studies that compared the effects of physiologic pacing and RVP. All eligible studies were published before January 1, 2021 and were conducted in humans. STATA software version 15.0 was used for all the data analyses. RESULTS Twenty articles (n = 2787 patients) were included in this meta-analysis. Compared to RVP, physiologic pacing was associated with a significantly shorter QRS duration and better cardiac function. Physiologic pacing was also correlated with lower rates of mitral regurgitation, pacing-induced cardiomyopathy, death, heart failure hospitalization, and atrial fibrillation, although the above results were not statistically significant. In addition, RVP led to the achievement of higher success rates than physiologic pacing, a shorter fluoroscopic time and mean procedure duration, a lower pacing threshold: the results were statistically significant. Compared with HBP, LBBaP appeared to have some advantages in R wave amplitudes, pacing threshold, fluoroscopic time, procedure time, and success rate, with statistically significant differences. Whereas HBP was associated with fewer surgical complications and shorter QRS duration, the results were not statistically significant. CONCLUSION Physiologic pacing (HBP/LBBaP) might be a better strategy than RVP and improve long-term clinical outcomes like cardiac function. Although LBBaP appears to have some advantages over HBP, the long-term benefits are still controversial. More large-scale randomized clinical trials are needed for further verification.
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Affiliation(s)
- Xinyi Peng
- Heart Center, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Yu Chen
- Heart Center, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Xiaofei Wang
- Department of Cardiology, Qindao University Medical College Affiliated Yantaiyuhuangding Hospital, Yantai, China
| | - Aizhen Hu
- Department of Cardiology, Qindao University Medical College Affiliated Yantaiyuhuangding Hospital, Yantai, China
| | - Xuexun Li
- Department of Cardiology, Shandong Provincial Hospital, Shandong, 250021, Jinan, China.
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Wouters PC, Vernooy K, Cramer MJ, Prinzen FW, Meine M. Optimizing lead placement for pacing in dyssynchronous heart failure: The patient in the lead. Heart Rhythm 2021; 18:1024-1032. [PMID: 33601035 DOI: 10.1016/j.hrthm.2021.02.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 02/09/2021] [Accepted: 02/10/2021] [Indexed: 10/22/2022]
Abstract
Cardiac resynchronization therapy (CRT) greatly reduces morbidity and mortality in patients with dyssynchronous heart failure. However, despite tremendous efforts, response has been variable and can be further improved. Although optimizing left ventricular lead placement (LVLP) is arguably the cornerstone of CRT, the procedure of LVLP using the transvenous approach has remained largely unchanged for more than 2 decades. Improvements have been developed using scar location and electrical and/or mechanical mapping, and interest in conduction system pacing as an alternative to biventricular pacing has emerged recently. Conduction system pacing is promising but may not be suitable for all patients with dyssynchronous heart failure. This review underscores the importance of a patient-tailored approach and discusses the potential applications of both conduction system pacing and targeted biventricular CRT.
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Affiliation(s)
- Philippe C Wouters
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands.
| | - Kevin Vernooy
- Department of Cardiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre+ (MUMC+), Maastricht, The Netherlands; Department of Cardiology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Maarten J Cramer
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Frits W Prinzen
- Department of Physiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, The Netherlands
| | - Mathias Meine
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands
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