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Stengl H, Ganeshan R, von Rennenberg R, Hellwig S, Herm J, Krause T, Bauer A, Endres M, Georg Haeusler K, Scheitz JF, Nolte CH. Heart rate turbulence in acute ischemic stroke. Eur Stroke J 2024; 9:226-234. [PMID: 37932964 PMCID: PMC10916809 DOI: 10.1177/23969873231211166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 10/13/2023] [Indexed: 11/08/2023] Open
Abstract
BACKGROUND Heart rate turbulence (HRT), an ECG-based marker of autonomic cardiac regulation, has shown high prognostic value in patients with established cardiovascular diseases, while data in patients with acute ischemic stroke are scarce. PATIENTS AND METHODS The HRT parameters turbulence onset and turbulence slope were analyzed using Holter-ECG recordings from patients with acute ischemic stroke, consecutively enrolled in the prospective observational HEBRAS study. HRT was categorized as normal (category 0; both parameters normal), abnormal (category 1; one parameter abnormal), or severely abnormal (category 2; both parameters abnormal). Outcomes of interest were functional outcome according to modified Rankin Scale (mRS) score at 3 months, mortality at 1 year, newly detected atrial fibrillation (AF), and evidence of focal myocardial fibrosis on cardiovascular MRI. RESULTS HRT was assessed in 335 patients in sinus rhythm (median age 69 years, 37% female, median NIHSS score 2 on admission), including 262 (78%) with normal HRT, 47 (14%) with abnormal and 26 (8%) with severely abnormal HRT. Compared with normal HRT, severely abnormal HRT was associated with increased disability [higher mRS] at 3 months (adjusted odds ratio [aOR]: 2.9, 95% confidence interval [CI]: 1.3-6.6), new AF (aOR: 3.5, 95% CI: 1.1-10.6), MRI-detected myocardial fibrosis (aOR: 5.8, 95% CI: 1.3-25.9), but not with mortality at 1 year after stroke (aOR: 3.0, 95% CI: 0.7-13.9). Abnormal HRT was not associated with the analyzed outcomes. CONCLUSIONS Severely abnormal HRT was associated with increased disability and previously unknown cardiac comorbidities. The potential role of HRT in selecting patients for extended AF monitoring and cardiac imaging should be further investigated.
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Affiliation(s)
- Helena Stengl
- Department of Neurology, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Center for Stroke Research Berlin (CSB), Charité – Universitätsmedizin Berlin, Berlin, Germany
- Berlin Institute of Health (BIH) at Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Ramanan Ganeshan
- Department of Neurology, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Center for Stroke Research Berlin (CSB), Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Regina von Rennenberg
- Department of Neurology, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Center for Stroke Research Berlin (CSB), Charité – Universitätsmedizin Berlin, Berlin, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site, Berlin, Germany
| | - Simon Hellwig
- Department of Neurology, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Center for Stroke Research Berlin (CSB), Charité – Universitätsmedizin Berlin, Berlin, Germany
- Berlin Institute of Health (BIH) at Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Juliane Herm
- Department of Neurology, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Center for Stroke Research Berlin (CSB), Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Thomas Krause
- Department of Neurology, Jüdisches Krankenhaus Berlin, Berlin, Germany
| | - Axel Bauer
- Working Group on Biosignal Analysis, Department of Cardiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Matthias Endres
- Department of Neurology, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Center for Stroke Research Berlin (CSB), Charité – Universitätsmedizin Berlin, Berlin, Germany
- Berlin Institute of Health (BIH) at Charité – Universitätsmedizin Berlin, Berlin, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site, Berlin, Germany
- German Center for Neurodegenerative Diseases (DZNE), Partner Site, Berlin, Germany
- German Center for Mental Health (DZPG), Partner Site, Berlin, Germany
| | - Karl Georg Haeusler
- Department of Neurology, Universitätsklinikum Würzburg (UKW), Würzburg, Germany
| | - Jan F Scheitz
- Department of Neurology, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Center for Stroke Research Berlin (CSB), Charité – Universitätsmedizin Berlin, Berlin, Germany
- Berlin Institute of Health (BIH) at Charité – Universitätsmedizin Berlin, Berlin, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site, Berlin, Germany
| | - Christian H Nolte
- Department of Neurology, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Center for Stroke Research Berlin (CSB), Charité – Universitätsmedizin Berlin, Berlin, Germany
- Berlin Institute of Health (BIH) at Charité – Universitätsmedizin Berlin, Berlin, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site, Berlin, Germany
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2
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Vandenberk B, Haemers P, Morillo C. The autonomic nervous system in atrial fibrillation-pathophysiology and non-invasive assessment. Front Cardiovasc Med 2024; 10:1327387. [PMID: 38239878 PMCID: PMC10794613 DOI: 10.3389/fcvm.2023.1327387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 12/13/2023] [Indexed: 01/22/2024] Open
Abstract
The autonomic nervous system plays a crucial role in atrial fibrillation pathophysiology. Parasympathetic hyperactivity result in a shortening of the action potential duration, a reduction of the conduction wavelength, and as such facilitates reentry in the presence of triggers. Further, autonomic remodeling of atrial myocytes in AF includes progressive sympathetic hyperinnervation by increased atrial sympathetic nerve density and sympathetic atrial nerve sprouting. Knowledge on the pathophysiological process in AF, including the contribution of the autonomic nervous system, may in the near future guide personalized AF management. This review focuses on the role of the autonomic nervous system in atrial fibrillation pathophysiology and non-invasive assessment of the autonomic nervous system.
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Affiliation(s)
- Bert Vandenberk
- Department of Cardiology, University Hospitals Leuven, Leuven, Belgium
- Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | - Peter Haemers
- Department of Cardiology, University Hospitals Leuven, Leuven, Belgium
- Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | - Carlos Morillo
- Department of Cardiac Sciences, Cumming School of Medicine, Libin Cardiovascular Institute, University of Calgary, Calgary, AB, Canada
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Kim JY, Park YJ, Park KM, On YK, Kim JS, Park SJ, Lee YT. Non-Invasive Risk Assessment and Prediction of Mortality in Patients Undergoing Coronary Artery Bypass Graft Surgery. J Cardiovasc Dev Dis 2023; 10:365. [PMID: 37754794 PMCID: PMC10531738 DOI: 10.3390/jcdd10090365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/13/2023] [Accepted: 08/24/2023] [Indexed: 09/28/2023] Open
Abstract
Objectives: Heart rate turbulence (HRT) and T-wave alternans (TWA), non-invasive markers of cardiac autonomic dysfunction, and ventricular repolarization abnormality, reportedly, predict the risk of cardiovascular death after myocardial infarction. We investigated whether pre-operative assessment of HRT and/or TWA could predict long-term mortality following coronary artery bypass graft (CABG) surgery. Methods: From May 2010 to December 2017, patients undergoing elective CABG and receiving 24 h ambulatory electrocardiogram monitoring 1 to 5 days prior to CABG surgery were prospectively enrolled. Pre-operative HRT and TWA were measured using a 24 h ambulatory electrocardiogram. The relative risk of cardiac or overall death was assessed according to abnormalities of HRT, TWA, or left ventricular ejection fraction (LV EF). Results: During the mean follow-up period of 4.6 ± 3.9 years, 40 adjudicated overall (5.9%/yr) and 5 cardiac deaths (0.9%/yr) occurred in 146 enrolled patients (64.9 ± 9.3 years; 108 males). Patients with abnormal HRT exhibited significantly higher relative risks of cardiac death (adjusted hazard ratio [HR] 24.9, 95% confidence interval [CI] 1.46-427) and all-cause death (adjusted HR 5.77, 95% CI 2.34-14.2) compared to those with normal HRT. Moreover, abnormal HRT plus abnormal TWA and LV EF < 50% was associated with a greater elevation in cardiac and overall mortality risk. The predictive role of abnormal HRT with/without abnormal TWA for all-cause death was likely more prominent in patients with mildly reduced (35 to 50%) or preserved (≥50%) LV EF. Abnormal HRT plus abnormal TWA and LV EF < 50% showed high negative predictive value in cardiac and overall mortality risk. Conclusions: Assessment of pre-operative HRT and/or TWA predicted mortality risk in patients undergoing elective CABG. Combined analysis of HRT, TWA, and LVEF enhanced the prognostic power. In particular, the predictive value of HRT was enhanced in patients with preserved or mid-range LV EF.
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Affiliation(s)
- Ju-Youn Kim
- Division of Cardiology, Department of Internal Medicine, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Young-Jun Park
- Division of Cardiology, Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju 24715, Republic of Korea
| | - Kyoung-Min Park
- Division of Cardiology, Department of Internal Medicine, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Young-Keun On
- Division of Cardiology, Department of Internal Medicine, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - June-Soo Kim
- Division of Cardiology, Department of Internal Medicine, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Seung-Jung Park
- Division of Cardiology, Department of Internal Medicine, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Young-Tak Lee
- Department of Thoracic and Cardiovascular Surgery, Incheon Sejong Hospital, Incheon 21080, Republic of Korea
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Gomes RAF, Sobral-Filho DC. Heart rate turbulence assessed through ergometry after myocardial infarction: a feasibility study. SAO PAULO MED J 2022; 140:762-766. [PMID: 36043674 PMCID: PMC9671564 DOI: 10.1590/1516-3180.2021.0884.r1.27012022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 01/27/2022] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Coronary artery disease is an important cause of morbidity and mortality. The impact of ventricular arrhythmias with impaired cardiac vagal activity is one of the most recently studied prognostic factors. However, there are no studies evaluating the phenomenon of heart rate turbulence (HRT) during physical exertion. OBJECTIVE To study the behavior of HRT during exercise testing, among individuals after myocardial infarction. DESIGN AND SETTING Feasibility study conducted in a university hospital among individuals 4-6 weeks after myocardial infarction. METHODS All subjects underwent 24-hour Holter monitoring and ergometric stress testing. We considered that abnormal HRT was present if the turbulence onset was ≥ 0% or turbulence slope was ≤ 2.5 mm/relative risk interval. RESULTS All 32 subjects were asymptomatic. Their median age was 58 years (interquartile range 12.8) and 70% were male. Abnormal HRT was associated with ventricular dysfunction in this population. We found no differences regarding the behavior of HRT, in relation to age, gender, smoking, systemic arterial hypertension, diabetes mellitus or dyslipidemia. Ergometric stress testing detected premature ventricular beats (PVB) in approximately 44% of the examinations, and these occurred both during the active phase of effort and in the recovery period. The low occurrence of several isolated PVB in beta-blocked subjects made it difficult to perform statistical analysis to correlate HRT between ergometric and Holter testing. CONCLUSION The data obtained in this study do not support performing HRT through ergometric stress testing among patients who remain on beta-blockers post-myocardial infarction, for the purpose of assessing cardiac vagal activity.
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Affiliation(s)
- Rafael Alessandro Ferreira Gomes
- MD, MSc, PhD. Attending Physician, Coronary Care Unit, Department of Cardiology, Universidade de Pernambuco (UPE), Recife (PE), Brazil
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Bienias P, Rymarczyk Z, Domienik-Karłowicz J, Lisik W, Sobieraj P, Pruszczyk P, Ciurzyński M. Assessment of arrhythmias and cardiac autonomic tone at a relatively young age patients with obesity class III. Clin Obes 2021; 11:e12424. [PMID: 33128430 DOI: 10.1111/cob.12424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/17/2020] [Accepted: 10/19/2020] [Indexed: 11/30/2022]
Abstract
There is no sufficient data on arrhythmias occurrence in obesity class III. The influence of hyperinsulinemia and insulin resistance on arrhythmias and cardiac autonomic tone is also of ongoing interest in these subjects. We prospectively studied 81 selected patients with body mass index >40 kg/m2 , aged 34 (18-65) years. Among other examinations all subjects underwent electrocardiography and Holter monitoring with heart rate variability (HRV) and turbulence (HRT) evaluation. Controls consisted of 45 healthy, sex- and aged-matched lean volunteers. In patients median BMI was 44.5 kg/m2 (40.1-58.1), benign arterial hypertension was present in 43.2% and dysglycemia in 27.2% of cases. In the group with obesity longer PR interval (P < .001) and corrected QT interval (P < .001) were observed, while in Holter monitoring no significant differences in supraventricular or ventricular arrhythmias and also bradyarrhythmias prevalence were observed in comparison to controls. In individuals with obesity HRV indices associated with sympathetic tone were significantly impaired and also abnormal HRT values (21.9 vs 0%, P = .04) were more frequently observed. There were no significant correlations between anthropometric obesity parameters and fasting insulin concentration, insulin resistance index and also HRV/HRT parameters in studied individuals. Univariate regression analysis revealed that only age influenced abnormal HRT occurrence (OR 1.69, 95%CI 1.08-2.98, P = .04). In conclusions, patients with obesity class III at a relatively young age who reported they felt healthy, do not present increased prevalence of arrhythmias, including life-threatening ones. Cardiac autonomic dysfunction is observed in these patients, however it has not been shown to be associated with anthropometric measurements.
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Affiliation(s)
- Piotr Bienias
- Department of Internal Medicine and Cardiology, Medical University of Warsaw, Warsaw, Poland
| | - Zuzanna Rymarczyk
- Department of Internal Medicine and Cardiology, Medical University of Warsaw, Warsaw, Poland
| | | | - Wojciech Lisik
- Department of General Surgery and Transplantology, Medical University of Warsaw, Warsaw, Poland
| | - Piotr Sobieraj
- Department of Internal Medicine, Hypertension and Vascular Diseases, Medical University of Warsaw, Warsaw, Poland
| | - Piotr Pruszczyk
- Department of Internal Medicine and Cardiology, Medical University of Warsaw, Warsaw, Poland
| | - Michał Ciurzyński
- Department of Internal Medicine and Cardiology, Medical University of Warsaw, Warsaw, Poland
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6
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Oyelade T, Canciani G, Bottaro M, Zaccaria M, Formentin C, Moore K, Montagnese S, Mani AR. Heart Rate Turbulence Predicts Survival Independently From Severity of Liver Dysfunction in Patients With Cirrhosis. Front Physiol 2020; 11:602456. [PMID: 33362578 PMCID: PMC7755978 DOI: 10.3389/fphys.2020.602456] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 11/16/2020] [Indexed: 12/20/2022] Open
Abstract
Background Reduced heart rate variability (HRV) is an independent predictor of mortality in patients with cirrhosis. However, conventional HRV indices can only be interpreted in individuals with normal sinus rhythm. In patients with recurrent premature ventricular complexes (PVCs), the predictive capacity of conventional HRV indices is compromised. Heart Rate Turbulence (HRT) represents the biphasic change of the heart rate after PVCs. This study was aimed to define whether HRT parameters could predict mortality in cirrhotic patients. Materials and Methods 24 h electrocardiogram recordings were collected from 40 cirrhotic patients. Turbulence Onset was calculated as HRT indices. The enrolled patients were followed up for 12 months after the recruitment in relation to survival and/or transplantation. Results During the follow-up period, 21 patients (52.5%) survived, 12 patients (30%) died and 7 patients (17.5%) had liver transplantation. Turbulence Onset was found to be strongly linked with mortality on Cox regression (Hazard ratio = 1.351, p < 0.05). Moreover, Turbulence Onset predicted mortality independently of MELD and Child-Pugh's Score. Conclusion This study provides further evidence of autonomic dysfunction in cirrhosis and suggests that HRT is reliable alternative to HRV in patients with PVCs.
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Affiliation(s)
- Tope Oyelade
- Institute for Liver and Digestive Health, Division of Medicine, UCL, London, United Kingdom
| | - Gabriele Canciani
- Institute for Liver and Digestive Health, Division of Medicine, UCL, London, United Kingdom.,School of Medicine, Sapienza University of Rome, Rome, Italy
| | - Matteo Bottaro
- Department of Medicine, University of Padova, Padua, Italy
| | - Marta Zaccaria
- Institute for Liver and Digestive Health, Division of Medicine, UCL, London, United Kingdom
| | | | - Kevin Moore
- Institute for Liver and Digestive Health, Division of Medicine, UCL, London, United Kingdom
| | | | - Ali R Mani
- Institute for Liver and Digestive Health, Division of Medicine, UCL, London, United Kingdom
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Yamada S, Yoshihisa A, Kaneshiro T, Amami K, Hijioka N, Oikawa M, Takeishi Y. The relationship between red cell distribution width and cardiac autonomic function in heart failure. J Arrhythm 2020; 36:1076-1082. [PMID: 33335628 PMCID: PMC7733562 DOI: 10.1002/joa3.12442] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/12/2020] [Accepted: 09/17/2020] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Both increases in red cell distribution width (RDW) levels and autonomic dysfunction are considered to be correlated with worsening heart failure. However, the relation of RDW levels to autonomic function remains uncertain. We aimed to investigate the association of RDW levels in heart failure with autonomic function, evaluated by heart rate variability (HRV) and heart rate turbulence (HRT), and prognosis. METHODS We studied 222 hospitalized patients with stable heart failure before discharge, and Holter recordings (HRV and HRT) were performed. Additionally, RDW levels were measured, and high RDW was defined as over 14.5%. We then divided the patients into two groups based on RDW levels: high RDW group (>14.5%, n = 92) and low RDW group (≤14.5%, n = 130). The relation of RDW to autonomic function and prognosis was assessed. RESULTS In the high RDW group, severely impaired HRV and HRT were found compared to the low RDW group. In the linear regression analysis after the adjustment of multiple confounders, RDW levels were correlated with a low-frequency (LF) to high-frequency (HF) ratio and very low-frequency (VLF) power (LF to HF ratio, β = -0.146, P = .027, and VLF power, β = -0.137, P = .041, respectively). During the observation period (median 1400 days), cardiac events (re-hospitalization of heart failure, cardiac death or sudden death) were found in 73 (32.8%) patients. The Kaplan-Meier analysis demonstrated that the high RDW group had a higher rate of cardiac events compared to the low RDW group (45.6% vs 23.8%, log-rank P < .001). CONCLUSION High RDW levels were correlated with autonomic dysfunction, resulting in poor clinical outcomes.
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Affiliation(s)
- Shinya Yamada
- Department of Cardiovascular MedicineFukushima Medical UniversityFukushimaJapan
| | - Akiomi Yoshihisa
- Department of Cardiovascular MedicineFukushima Medical UniversityFukushimaJapan
- Department of Advanced Cardiac TherapeuticsFukushima Medical UniversityFukushimaJapan
| | - Takashi Kaneshiro
- Department of Cardiovascular MedicineFukushima Medical UniversityFukushimaJapan
- Department of Arrhythmia and Cardiac PacingFukushima Medical UniversityFukushimaJapan
| | - Kazuaki Amami
- Department of Cardiovascular MedicineFukushima Medical UniversityFukushimaJapan
| | - Naoko Hijioka
- Department of Cardiovascular MedicineFukushima Medical UniversityFukushimaJapan
| | - Masayoshi Oikawa
- Department of Cardiovascular MedicineFukushima Medical UniversityFukushimaJapan
| | - Yasuchika Takeishi
- Department of Cardiovascular MedicineFukushima Medical UniversityFukushimaJapan
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Giurgi-Oncu C, Tudoran C, Enatescu VR, Tudoran M, Pop GN, Bredicean C. Evolution of Heart Rate Variability and Heart Rate Turbulence in Patients with Depressive Illness Treated with Selective Serotonin Reuptake Inhibitors. Medicina (Kaunas) 2020; 56:E590. [PMID: 33167574 PMCID: PMC7694481 DOI: 10.3390/medicina56110590] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/02/2020] [Accepted: 11/03/2020] [Indexed: 12/16/2022]
Abstract
Background and objectives: Major depressive disorder (MDD) and cardiovascular diseases (CVDs) represent serious and prevalent medical conditions. Autonomic nervous system (ANS) dysfunctions, expressed by parameters of heart rate variability (HRV) and heart rate turbulence (HRT), have been repeatedly associated with depression. The aim of our study was to identify potential HRV and HRT alterations in patients with MDD, before and after selective serotonin reuptake inhibitor (SSRI) therapy, and to observe any correlations between these parameters and the severity of depressive symptoms. Another aim was to evidence if there was a normalization or improvement of HRV and HRT parameters that paralleled the reduction of the intensity of depressive symptoms. Materials and Methods: We studied heart rate variability (HRV) and heart rate turbulence (HRT) in a sample of 78 patients, aged under 51 years, who were referred to our outpatient clinic between June 2017 and December 2019, for complaints in the context of a new onset major depressive disorder (MDD), before and after therapy with SSRIs. Results: By using 24 h Holter ECG monitoring, we evidenced alterations of HRV and HRT parameters, significantly correlated with the severity of depressive symptoms (p < 0.001), as assessed by the Montgomery-Åsberg Depression Rating Scale (MADRS). Our results indicated that these parameters improved following one and six months of SSRI therapy, when a partial or total remission of depressive symptoms was achieved (p < 0.001). Changes in HRV parameters were correlated with the reduction of the severity of depression. Conclusions: In our study group, we highlighted, through 24 h ECG Holter monitoring, frequent and clear HRV and HRT abnormalities that were statistically correlated with the severity of depressive symptoms. Furthermore, we were able to document a progressive improvement of these parameters, which corresponded with the improvement of depressive symptoms under SSRI therapy, when compared to the values measured before the commencement of antidepressant pharmacotherapy.
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Affiliation(s)
- Catalina Giurgi-Oncu
- Discipline of Psychiatry, Department of Neuroscience, University of Medicine and Pharmacy “Victor Babes” Timisoara, Eftimie Murgu Place Nr. 2, 300041 Timis, Romania; (C.G.-O.); (V.R.E.); (C.B.)
| | - Cristina Tudoran
- Discipline of Cardiology, Department VII, Internal Medicine II, University of Medicine and Pharmacy “Victor Babes” Timisoara, Eftimie Murgu Place Nr. 2, 300041 Timis, Romania; (M.T.); (G.N.P.)
| | - Virgil Radu Enatescu
- Discipline of Psychiatry, Department of Neuroscience, University of Medicine and Pharmacy “Victor Babes” Timisoara, Eftimie Murgu Place Nr. 2, 300041 Timis, Romania; (C.G.-O.); (V.R.E.); (C.B.)
| | - Mariana Tudoran
- Discipline of Cardiology, Department VII, Internal Medicine II, University of Medicine and Pharmacy “Victor Babes” Timisoara, Eftimie Murgu Place Nr. 2, 300041 Timis, Romania; (M.T.); (G.N.P.)
| | - Gheorghe Nicusor Pop
- Discipline of Cardiology, Department VII, Internal Medicine II, University of Medicine and Pharmacy “Victor Babes” Timisoara, Eftimie Murgu Place Nr. 2, 300041 Timis, Romania; (M.T.); (G.N.P.)
| | - Cristina Bredicean
- Discipline of Psychiatry, Department of Neuroscience, University of Medicine and Pharmacy “Victor Babes” Timisoara, Eftimie Murgu Place Nr. 2, 300041 Timis, Romania; (C.G.-O.); (V.R.E.); (C.B.)
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Vandenberk B, Floré V, Röver C, Vos MA, Dunnink A, Leftheriotis D, Friede T, Flevari P, Zabel M, Willems R. Repeating noninvasive risk stratification improves prediction of outcome in ICD patients. Ann Noninvasive Electrocardiol 2020; 25:e12794. [PMID: 32804415 PMCID: PMC7679829 DOI: 10.1111/anec.12794] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/12/2020] [Accepted: 06/16/2020] [Indexed: 02/05/2023] Open
Abstract
Background Noninvasive risk stratification aims to detect abnormalities in the pathophysiological mechanisms underlying ventricular arrhythmias. We studied the predictive value of repeating risk stratification in patients with an implantable cardioverter‐defibrillator (ICD). Methods The EUTrigTreat clinical study was a prospective multicenter trial including ischemic and nonischemic cardiomyopathies and arrhythmogenic heart disease. Left ventricular ejection fraction ≤40% (LVEF), premature ventricular complexes >400/24 hr (PVC), non‐negative microvolt T‐wave alternans (MTWA), and abnormal heart rate turbulence (HRT) were considered high risk. Tests were repeated within 12 months after inclusion. Adjusted Cox regression analysis was performed for mortality and appropriate ICD shocks. Results In total, 635 patients had analyzable baseline data with a median follow‐up of 4.4 years. Worsening of LVEF was associated with increased mortality (HR 3.59, 95% CI 1.17–11.04), as was consistent abnormal HRT (HR 8.34, 95%CI 1.06–65.54). HRT improvement was associated with improved survival when compared to consistent abnormal HRT (HR 0.10, 95%CI 0.01–0.82). For appropriate ICD shocks, a non‐negative MTWA test or high PVC count at any moment was associated with increased arrhythmic risk independent of the evolution of test results (worsening: HR 3.76 (95%CI 1.43–9.88) and HR 2.50 (95%CI 1.15–5.46); improvement: HR 2.80 (95%CI 1.03–7.61) and HR 2.45 (95%CI 1.07–5.62); consistent: HR 2.47 (95%CI 0.95–6.45) and HR 2.40 (95%CI 1.33–4.33), respectively). LVEF improvement was associated with a lower arrhythmic risk (HR 0.34, 95%CI 0.12–0.94). Conclusions Repeating LVEF and HRT improved the prediction of mortality, whereas stratification of ventricular arrhythmias may be improved by repeating LVEF measurements, MTWA and ECG Holter monitoring.
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Affiliation(s)
- Bert Vandenberk
- Department of Cardiovascular Sciences, University of Leuven, Leuven, Belgium.,Department of Cardiology, University Hospitals Leuven, Leuven, Belgium
| | - Vincent Floré
- Department of Cardiovascular Sciences, University of Leuven, Leuven, Belgium
| | - Christian Röver
- Department of Medical Statistics, University Medical Center Göttingen, Gottingen, The Netherlands
| | - Mark A Vos
- Department of Physiology, University Medical Center Utrecht, UMCU, Utrecht, The Netherlands
| | - Albert Dunnink
- Department of Physiology, University Medical Center Utrecht, UMCU, Utrecht, The Netherlands
| | | | - Tim Friede
- Department of Medical Statistics, University Medical Center Göttingen, Gottingen, The Netherlands
| | - Panagiota Flevari
- Department of Cardiology, Attikon University Hospital, AUH, Athens, Greece
| | - Markus Zabel
- Department of Cardiology, Heart Centre, University Medical Center Göttingen, Gottingen, The Netherlands
| | - Rik Willems
- Department of Cardiovascular Sciences, University of Leuven, Leuven, Belgium.,Department of Cardiology, University Hospitals Leuven, Leuven, Belgium
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10
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Yamada S, Yoshihisa A, Hijioka N, Kamioka M, Kaneshiro T, Yokokawa T, Misaka T, Ishida T, Takeishi Y. Autonomic dysfunction in cardiac amyloidosis assessed by heart rate variability and heart rate turbulence. Ann Noninvasive Electrocardiol 2020; 25:e12749. [PMID: 32083399 PMCID: PMC7358876 DOI: 10.1111/anec.12749] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 12/03/2019] [Accepted: 01/08/2020] [Indexed: 01/19/2023] Open
Abstract
Background Cardiac amyloidosis (CA) is characterized by left ventricular hypertrophy (LVH) and autonomic nervous imbalance due to amyloid infiltration. However, autonomic dysfunction is often seen in heart failure (HF) with LVH from other etiologies. We aimed to characterize autonomic dysfunction in CA from other etiologies of LVH. Methods Fifty‐five HF patients with LVH (35 males, mean age 65 ± 16 years) were enrolled. LVH was defined as left ventricular mass index measured by echocardiography >95 g/m2 in women and 115 g/m2 in men. The etiology was as follows: amyloid light chain (AL)‐CA, n = 14; hypertrophic cardiomyopathy, n = 21; and aortic stenosis (AS), n = 20. With the patient in a clinically stable condition, heart rate variability (HRV) and heart rate turbulence (HRT), which reflect autonomic dysfunction, were measured using Holter monitoring and compared among the three groups. Results Brain natriuretic peptide levels, LVH severity, left ventricular ejection fraction, and tissue Doppler index E/e′ did not differ among the three groups. However, severe abnormalities of HRV and HRT were obtained in AL‐CA. In the ROC analysis to identify AL‐CA in HF with LVH, the best cutoff value for standard deviation of all R‐R intervals, standard deviation of the 5‐min mean R‐R intervals, turbulence onset, and turbulence slope were 68.5 ms (AUC: 0.865), 58.5 ms (AUC: 0.834), 0.25% (AUC: 0.813), and 1.00 ms/RR (AUC 0.736), respectively. Conclusion Autonomic dysfunction is a hallmark of AL‐CA, and its noninvasive assessment by Holter monitoring may be a useful tool for differential diagnosis of HF with LVH.
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Affiliation(s)
- Shinya Yamada
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Akiomi Yoshihisa
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan.,Department of Advanced Cardiac Therapeutics, Fukushima Medical University, Fukushima, Japan
| | - Naoko Hijioka
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Masashi Kamioka
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Takashi Kaneshiro
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan.,Department of Arrhythmia and Cardiac Pacing, Fukushima Medical University, Fukushima, Japan
| | - Tetsuro Yokokawa
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Tomofumi Misaka
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan.,Department of Advanced Cardiac Therapeutics, Fukushima Medical University, Fukushima, Japan
| | - Takafumi Ishida
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Yasuchika Takeishi
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
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11
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Braunisch MC, Mayer CC, Bauer A, Lorenz G, Haller B, Rizas KD, Hagmair S, von Stülpnagel L, Hamm W, Günthner R, Angermann S, Matschkal J, Kemmner S, Hasenau AL, Zöllinger I, Steubl D, Mann JF, Lehnert T, Scherf J, Braun JR, Moog P, Küchle C, Renders L, Malik M, Schmidt G, Wassertheurer S, Heemann U, Schmaderer C. Cardiovascular Mortality Can Be Predicted by Heart Rate Turbulence in Hemodialysis Patients. Front Physiol 2020; 11:77. [PMID: 32116784 PMCID: PMC7027389 DOI: 10.3389/fphys.2020.00077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 01/23/2020] [Indexed: 12/12/2022] Open
Abstract
Background Excess mortality in hemodialysis patients is mostly of cardiovascular origin. We examined the association of heart rate turbulence (HRT), a marker of baroreflex sensitivity, with cardiovascular mortality in hemodialysis patients. Methods A population of 290 prevalent hemodialysis patients was followed up for a median of 3 years. HRT categories 0 (both turbulence onset [TO] and slope [TS] normal), 1 (TO or TS abnormal), and 2 (both TO and TS abnormal) were obtained from 24 h Holter recordings. The primary end-point was cardiovascular mortality. Associations of HRT categories with the endpoints were analyzed by multivariable Cox regression models including HRT, age, albumin, and the improved Charlson Comorbidity Index for hemodialysis patients. Multivariable linear regression analysis identified factors associated with TO and TS. Results During the follow-up period, 20 patients died from cardiovascular causes. In patients with HRT categories 0, 1 and 2, cardiovascular mortality was 1, 10, and 22%, respectively. HRT category 2 showed the strongest independent association with cardiovascular mortality with a hazard ratio of 19.3 (95% confidence interval: 3.69-92.03; P < 0.001). Age, calcium phosphate product, and smoking status were associated with TO and TS. Diabetes mellitus and diastolic blood pressure were only associated with TS. Conclusion Independent of known risk factors, HRT assessment allows identification of hemodialysis patients with low, intermediate, and high risk of cardiovascular mortality. Future prospective studies are needed to translate risk prediction into risk reduction in hemodialysis patients.
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Affiliation(s)
- Matthias C Braunisch
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Christopher C Mayer
- Center for Health & Bioresources, Biomedical Systems, AIT Austrian Institute of Technology GmbH, Vienna, Austria
| | - Axel Bauer
- Department of Cardiology, Munich University Clinic, German Centre for Cardiovascular Research, Ludwig Maximilian University of Munich, Munich, Germany.,University Hospital for Internal Medicine III, Medical University Innsbruck, Innsbruck, Austria
| | - Georg Lorenz
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Bernhard Haller
- Institut für Medizinische Informatik, Statistik und Epidemiologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Konstantinos D Rizas
- Department of Cardiology, Munich University Clinic, German Centre for Cardiovascular Research, Ludwig Maximilian University of Munich, Munich, Germany
| | - Stefan Hagmair
- Center for Health & Bioresources, Biomedical Systems, AIT Austrian Institute of Technology GmbH, Vienna, Austria
| | - Lukas von Stülpnagel
- Department of Cardiology, Munich University Clinic, German Centre for Cardiovascular Research, Ludwig Maximilian University of Munich, Munich, Germany.,University Hospital for Internal Medicine III, Medical University Innsbruck, Innsbruck, Austria
| | - Wolfgang Hamm
- Department of Cardiology, Munich University Clinic, German Centre for Cardiovascular Research, Ludwig Maximilian University of Munich, Munich, Germany
| | - Roman Günthner
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Susanne Angermann
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Julia Matschkal
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Stephan Kemmner
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Anna-Lena Hasenau
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Isabel Zöllinger
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Dominik Steubl
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Johannes F Mann
- Department of Nephrology, University of Erlangen-Nuremberg, Erlangen, Germany.,KfH Kidney Center, Munich, Germany
| | | | | | | | - Philipp Moog
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Claudius Küchle
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Lutz Renders
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Marek Malik
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Georg Schmidt
- Klinik für Innere Medizin I, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Siegfried Wassertheurer
- Center for Health & Bioresources, Biomedical Systems, AIT Austrian Institute of Technology GmbH, Vienna, Austria
| | - Uwe Heemann
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
| | - Christoph Schmaderer
- Abteilung für Nephrologie, Klinikum Rechts der Isar, Fakultät für Medizin, Technische Universität München, Munich, Germany
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12
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Candemir M, Onder H. Assessing Autonomic Nervous Function by Heart Rate Variability and Heart Rate Turbulence in Patients with Acute Ischemic Stroke. Ann Indian Acad Neurol 2020; 23:608-615. [PMID: 33623259 PMCID: PMC7887491 DOI: 10.4103/aian.aian_647_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 12/23/2019] [Accepted: 01/26/2020] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Acute ischemic stroke (AIS) induces adverse effects on the cardiovascular system by affecting the autonomic nervous system (ANS). OBJECTIVES This study aimed to determine whether the parameters of heart rate variability (HRV) and heart rate turbulence (HRT) differed in patients with AIS as compared to that in the control group. Furthermore, we aimed to determine the differences in the involvement of the ANS between right and left hemisphere (LH) strokes. METHODS A total of 148 [74 right hemispheres (RH) and 74 left hemispheres] patients with AIS and 80 control subjects were included in the study. The Holter device was used to obtain elcctrocardiogram readings for over 20 h from all patients. Results of HRV and HRT parameters [Tonset (TO) and Tslope (TS)] were acquired through an automatic analysis of the program. RESULTS All HRV parameters were found to be low in patients with AIS (P < 0.05, for all parameters). TO and TS were disrupted in 99 patients with AIS (66.8%) and in 15 control subjects (18.7%) (HRT-1 and HRT-2 groups, P = <0.001). HRV parameters were detected to be similar in patients, irrespective of the left or right infarct. TO and TS were normal in 31 patients (41.9%) with left hemisphere localization and in only 18 patients (24.3%) with right hemisphere localization. CONCLUSIONS Combined evaluation of HRV and HRT parameters may provide important information regarding the alterations in the ANS in patients with AIS. The utility of HRT in the determination of ANS alterations in patients with AIS should be investigated in larger future prospective studies.
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Affiliation(s)
- Mustafa Candemir
- Department of Cardiology and, Yozgat City Hospital, 66100, Yozgat, Turkey,Address for correspondence: Dr. Mustafa Candemir, Yozgat City Hospital, Cardiology Clinic, Yozgat, 66100, Turkey. E-mail:
| | - Halil Onder
- Department of Neurology, Yozgat City Hospital, 66100, Yozgat, Turkey
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13
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Urbanik D, Gać P, Martynowicz H, Poręba M, Podgórski M, Negrusz-Kawecka M, Mazur G, Sobieszczańska M, Poręba R. Obstructive Sleep Apnea as a Predictor of Abnormal Heart Rate Turbulence. J Clin Med 2019; 9:E1. [PMID: 31861257 DOI: 10.3390/jcm9010001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 12/09/2019] [Accepted: 12/17/2019] [Indexed: 11/16/2022] Open
Abstract
Obstructive sleep apnea (OSA) causes dysfunction of the autonomic nervous system, but the exact mechanism has not been fully understood. The aim of this study was to analyse the relationship between the incidence and severity of OSA and heart rate turbulence (HRT). Seventy one patients with clinical suspicion of OSA were qualified to participate in the study. All participants took part in a survey and were subjected to laboratory tests, 24-hour electrocardiogram (ECG) Holter monitoring with HRT analysis and polysomnography. The group with OSA manifested significantly higher turbulence onset (TO) and lower turbulence slope (TS) as compared to the group without OSA. Older age, diabetes, hypertension and higher apnea/hypopnea index (AHI) were found to be independent risk factors for increased TO, whereas older age, higher body mass index (BMI), higher blood glucose levels, hypertension and higher AHI were independent risk factors for TS reduction. The AHI ≥65 criterion indicates abnormal HRT in patients with OSA with 94.9% sensitivity and 50.0% specificity, which gives a prediction accuracy of 85.7%. In summary, OSA should be considered as a predictor of abnormal HRT.
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14
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Tudoran C, Tudoran M, Vlad M, Balas M, Ciocarlie T, Parv F. Alterations of heart rate variability and turbulence in female patients with hyperthyroidism of various severities. Niger J Clin Pract 2019; 22:1349-1355. [PMID: 31607723 DOI: 10.4103/njcp.njcp_61_18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Objective The objective of the this study is to document the existence of statistically significant differences between parameters of heart rate variability (HRV) and heart rate turbulence (HRT), determined in women with overt hyperthyroidism (hT), compared to controls and to highlight their correlations with the level of thyroid hormones and the incidence of arrhythmias. Methods We studied the HRV in time and frequency domain, and the HRT in a group of 113 women with overt hT, without other cardiovascular risk factors or comorbidities, admitted to the endocrinology clinic of our hospital, between 2012 and 2016. Depending on the severity and duration of hT and levels of thyroid hormones, the patients were assigned to three groups: mild and moderate forms, severe hT with thyrotoxicosis and persistent cases with a relapse of hT. We performed 24 h Holter monitoring in all patients. Results HRV parameters in time domain (TD) were significantly depressed in patients comparing to controls. All patients had abnormal, positive values of turbulence onset (TO) with significant statistically differences (P < 0.0001) comparing to controls. Although positive, the values of turbulence slope (TS) decreased according to the severity of hT. Conclusion Patients with hT had depressed values of HRV parameters in TD, correlated with the severity of the thyroid disease and with the incidence of arrhythmias. All patients presented pathological values of TO. TS values were positive, but lower compared to controls.
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Affiliation(s)
- C Tudoran
- Department VII, Internal Medicine II, University of Medicine and Pharmacy Victor Babes, Timişoara, Romania
| | - M Tudoran
- Department VII, Internal Medicine II, University of Medicine and Pharmacy Victor Babes, Timişoara, Romania
| | - M Vlad
- Department VII, Internal Medicine II, University of Medicine and Pharmacy Victor Babes, Timişoara, Romania
| | - M Balas
- Department VII, Internal Medicine II, University of Medicine and Pharmacy Victor Babes, Timişoara, Romania
| | - T Ciocarlie
- Department VII, Internal Medicine II, University of Medicine and Pharmacy Victor Babes, Timişoara, Romania
| | - F Parv
- Department VII, Internal Medicine II, University of Medicine and Pharmacy Victor Babes, Timişoara, Romania
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15
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Poliwczak AR, Waszczykowska E, Dziankowska-Bartkowiak B, Dworniak-Pryca K. Abnormalities of heart rate turbulence and heart rate variability as indicators of increased cardiovascular risk in patients with systemic sclerosis. Postepy Dermatol Alergol 2019; 36:707-13. [PMID: 31997999 DOI: 10.5114/ada.2019.83134] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 07/15/2018] [Indexed: 01/16/2023] Open
Abstract
Introduction Systemic sclerosis (SSc) is a connective tissue disease manifested by progressive fibrosis of many internal organs including the cardiovascular system and development of autonomic disorders with sympathetic predominance. These abnormalities can increase cardiovascular mortality. Aim To evaluate heart rate turbulence (HRT) and variability (HRV) parameters (indicator of autonomic imbalance) obtained from 24-hour ECG Holter monitoring, as predictors of the increased cardiovascular risk in patients with scleroderma. Material and methods Thirty-twoscleroderma patients and 30 healthy people were included. After clinical examination, ECG, routine laboratory tests and echocardiography, participants performed 24-hour Holter-ECG at home. For HRT assessment, turbulence onset (To) and turbulence slope (Ts) parameters were used. Both time and frequency domain analysis of HRV was used. The HRV circadian rhythm was also evaluated. Results Time domain: SDNN, SDNN-ix, SDANN and frequency domain: LF, VLF, ULF, NHF, NLF, parameters were lower, while p50NN was higher in SSc as compared to the control group. There was also a loss of the circadian rhythm for r-MSSD and p50NN present in the control group. Abnormal HRT parameters To and/or Ts occurred in the SSc group only. The median value of To = –1.24% and Ts = 11.13 ms/RR did not differ significantly as compared to the control group. Conclusions The study confirmed the presence of HRV disturbances, including HRV circadian rhythm, as it may seem at an early stage of SSc. The HRT disorders may be characterized by the increasing changes with advancing disease. This indicates the presence of autonomic imbalance and an increased cardiovascular risk.
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16
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Yamada S, Yoshihisa A, Sato Y, Sato T, Kamioka M, Kaneshiro T, Oikawa M, Kobayashi A, Suzuki H, Ishida T, Takeishi Y. Utility of heart rate turbulence and T-wave alternans to assess risk for readmission and cardiac death in hospitalized heart failure patients. J Cardiovasc Electrophysiol 2018; 29:1257-1264. [PMID: 29777559 DOI: 10.1111/jce.13639] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/30/2018] [Accepted: 05/15/2018] [Indexed: 11/28/2022]
Abstract
BACKGROUND Heart failure (HF) patients have a higher risk of recurrent HF and cardiac death, and electrical remodeling is considered to be an important factor for HF progression. The present study aimed to validate the utility of electrocardiogram and Holter monitoring for the risk stratification of HF patients. METHODS Our study comprised 215 patients (144 males, mean age 62 years) who had been hospitalized due to acute decompensated HF. Electrocardiogram (QRS duration and QTc interval) and 24-hour Holter monitoring (heart rate variability, heart rate turbulence, and T-wave alternans [TWA]) were performed in stable condition before discharge. The clinical characteristics and outcomes were then investigated. RESULTS During a median follow-up period of 2.7 years, there were 83 (38.6%) cardiac events (rehospitalization due to worsening HF [n = 51] or cardiac death [n = 32]). The patients with cardiac events had a lower turbulence slope (TS) and higher TWA compared to those without cardiac events (TS, 3.0 ± 5.5 ms/RR vs. 5.3 ± 5.6 ms/RR, P = 0.001; TWA, 66.1 ± 19.6 μV vs. 54.7 ± 15.1 μV, P < 0.001). Univariable analysis showed that TS, TWA, QRS duration, and QTc interval were associated with cardiac events (P = 0.004, P < 0.001, P = 0.037, and P = 0.024, respectively), while the multivariable analysis after the adjustment of multiple confounders showed that TS and TWA were independent predictive factors of cardiac events with a hazard ratio of 0.936 and 1.015 (95% confidence interval [CI]: 0.860-0.974, P = 0.006; and 95% CI: 1.003-1.027, P = 0.016), respectively. CONCLUSION The measurement of TS and TWA is useful for assessing risk for rehospitalization and cardiac death in HF patients.
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Affiliation(s)
- Shinya Yamada
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Akiomi Yoshihisa
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan.,Department of Advanced Cardiac Therapeutics, Fukushima Medical University, Fukushima, Japan
| | - Yu Sato
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Takamasa Sato
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Masashi Kamioka
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Takashi Kaneshiro
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan.,Department of Arrhythmia and Cardiac Pacing, Fukushima Medical University, Fukushima, Japan
| | - Masayoshi Oikawa
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Atsushi Kobayashi
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Hitoshi Suzuki
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Takafumi Ishida
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
| | - Yasuchika Takeishi
- Department of Cardiovascular Medicine, Fukushima Medical University, Fukushima, Japan
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17
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Matusik PS, Matusik PT, Stein PK. Heart rate variability in patients with systemic lupus erythematosus: a systematic review and methodological considerations. Lupus 2018; 27:1225-1239. [PMID: 29697012 DOI: 10.1177/0961203318771502] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Aim The aim of this review was to summarize current knowledge about the scientific findings and potential clinical utility of heart rate variability measures in patients with systemic lupus erythematosus. Methods PubMed, Embase and Scopus databases were searched for the terms associated with systemic lupus erythematosus and heart rate variability, including controlled vocabulary, when appropriate. Articles published in English and available in full text were considered. Finally, 11 publications were selected, according to the systematic review protocol and were analyzed. Results In general, heart rate variability, measured in the time and frequency domains, was reported to be decreased in patients with systemic lupus erythematosus compared with controls. In some systemic lupus erythematosus studies, heart rate variability was found to correlate with inflammatory markers and albumin levels. A novel heart rate variability measure, heart rate turbulence onset, was shown to be increased, while heart rate turbulence slope was decreased in systemic lupus erythematosus patients. Reports of associations of changes in heart rate variability parameters with increasing systemic lupus erythematosus activity were inconsistent, showing decreasing heart rate variability or no relationship. However, the low/high frequency ratio was, in some studies, reported to increase with increasing disease activity or to be inversely correlated with albumin levels. Conclusions Patients with systemic lupus erythematosus have abnormal heart rate variability, which reflects cardiac autonomic dysfunction and may be related to inflammatory cytokines but not necessarily to disease activity. Thus measurement of heart rate variability could be a useful clinical tool for monitoring autonomic dysfunction in systemic lupus erythematosus, and may potentially provide prognostic information.
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Affiliation(s)
- P S Matusik
- 1 Department of Radiology, University Hospital, Kraków, Poland.,2 Jagiellonian University Medical College, Kraków, Poland
| | - P T Matusik
- 3 Department of Electrocardiology, The John Paul II Hospital, Kraków, Poland.,4 Institute of Cardiology, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| | - P K Stein
- 5 Department of Medicine, Washington University School of Medicine, USA
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18
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Soguero-Ruiz C, Mora-Jiménez I, Ramos-López J, Quintanilla Fernández T, García-García A, Díez-Mazuela D, García-Alberola A, Rojo-Álvarez JL. An Interoperable System toward Cardiac Risk Stratification from ECG Monitoring. Int J Environ Res Public Health 2018; 15:E428. [PMID: 29494497 DOI: 10.3390/ijerph15030428] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 02/25/2018] [Accepted: 02/26/2018] [Indexed: 01/16/2023]
Abstract
Many indices have been proposed for cardiovascular risk stratification from electrocardiogram signal processing, still with limited use in clinical practice. We created a system integrating the clinical definition of cardiac risk subdomains from ECGs and the use of diverse signal processing techniques. Three subdomains were defined from the joint analysis of the technical and clinical viewpoints. One subdomain was devoted to demographic and clinical data. The other two subdomains were intended to obtain widely defined risk indices from ECG monitoring: a simple-domain (heart rate turbulence (HRT)), and a complex-domain (heart rate variability (HRV)). Data provided by the three subdomains allowed for the generation of alerts with different intensity and nature, as well as for the grouping and scrutinization of patients according to the established processing and risk-thresholding criteria. The implemented system was tested by connecting data from real-world in-hospital electronic health records and ECG monitoring by considering standards for syntactic (HL7 messages) and semantic interoperability (archetypes based on CEN/ISO EN13606 and SNOMED-CT). The system was able to provide risk indices and to generate alerts in the health records to support decision-making. Overall, the system allows for the agile interaction of research and clinical practice in the Holter-ECG-based cardiac risk domain.
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19
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Lin K, Wei L, Huang Z, Zeng Q. Combination of Ewing test, heart rate variability, and heart rate turbulence analysis for early diagnosis of diabetic cardiac autonomic neuropathy. Medicine (Baltimore) 2017; 96:e8296. [PMID: 29137013 PMCID: PMC5690706 DOI: 10.1097/md.0000000000008296] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 08/30/2017] [Accepted: 09/15/2017] [Indexed: 02/05/2023] Open
Abstract
The aim of this study was to compare and analyze Ewing test, heart rate variability (HRV), and heart rate turbulence (HRT) in the diagnosis of cardiac autonomic neuropathy (CAN) in diabetic patients.Ninety diabetic patients (age 18-78) and 20 nondiabetic control subjects were studied. Standard Ewing test and 24-hour Holter was performed in all participants to evaluate CAN. Patients with Ewing score ≥2 were classified as CAN+.The rate of CAN+ in diabetic patients [44.4% (40/90)] was higher than that in the controls [5% (1/20)] (P < .05). Using the HRV analysis and HRT analysis, rates of CAN+ in diabetic patients were 56.67% (51/90) and 52.22% (47/90), respectively. SD of all normal-to-normal (NN) intervals (SDNN), SD of the average NN intervals calculated over 5-minute periods of the entire recording (SDANN), low frequency power (LF), and turbulence slope (TS) were significantly correlated negatively with Ewing scores. TS (r = -0.68, P < .05) and SDNN (r = -0.58, P < .05) had the strongest correlation with Ewing scores among relevant factors. Combining TS with SDNN as diagnostic criteria for CAN, the diagnostic sensitivity can be increased to 98%.Parameters used for evaluating parasympathetic functions in Ewing test, HR variability, and HR turbulence were found to significantly decrease in CAN+ group. The combination of SDNN and TS showed greater diagnostic value than Ewing test, HRV analysis, or HRT analysis alone.
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Affiliation(s)
| | - Liling Wei
- Department of Neurology, The First Affiliated Hospital of Shantou University Medical College
| | - Zhihua Huang
- Shantou University Medical College, Shantou, China
| | - Qiong Zeng
- Department of Neurology, The First Affiliated Hospital of Shantou University Medical College
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Kaplan RM, Herzog CA, Larive B, Subacius H, Nearing BD, Verrier R, Passman RS. T-Wave Alternans, Heart Rate Turbulence, and Ventricular Ectopy in Standard versus Daily Hemodialysis: Results from the FHN Daily Trial. Ann Noninvasive Electrocardiol 2016; 21:566-571. [PMID: 27778458 DOI: 10.1111/anec.12354] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Revised: 02/04/2016] [Accepted: 02/11/2016] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Hemodialysis (HD) patients are at high risk of sudden cardiac death (SCD). HD 6-times/week (6x/wk) may reduce SCD risk compared to usual 3-times/week HD (3x/wk) by mechanisms unknown. T-wave alternans (TWA), heart rate turbulence (HRT), and ventricular ectopy (VE) are elevated in HD patients, but their response to 6x/wk HD has not been assessed. METHODS Baseline and 1-year Holter recordings were analyzed from enrollees in the Frequent Hemodialysis Network Daily Trial, a randomized trial comparing 3x/wk to 6x/wk in 245 chronic HD patients. TWA, HRT, and VE were assessed using MARS software. RESULTS Sixty-eight patients (34 with 6x/wk) had complete baseline and 1-year Holter recordings. Mean age was 50 ± 13 years and 38% were female. Maximum TWA in the 3x/wk and 6x/wk groups were 52.4 μV at baseline and 51.2 μV at 1-year versus 54.0 and 49.9 μV, respectively (P = 0.28). The proportion of abnormal HRT (scores of 1 or 2) in the 3x/wk group decreased from 65% to 56% at 1-year versus 53% to 53% in the 6x/wk group (P = 0.58). Mean %VE changed from 1.6% to 2.9% in the 3x/wk group from baseline to 1-year and from 2.1% to 3.7% in the 6x/wk group (P = 0.85). CONCLUSIONS There were no significant differences in HRT or VE at 1-year in chronic HD patients randomized to 6x/wk versus 3x/wk and a trend in TWA reduction. Additional studies are needed to evaluate the impact and mechanisms of SCD in HD.
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Affiliation(s)
- Rachel M Kaplan
- Northwestern University, Feinberg School of Medicine, Chicago, IL
| | - Charles A Herzog
- Hennepin County Medical Center, University of Minnesota, Minneapolis, MN
| | | | - Haris Subacius
- Northwestern University, Feinberg School of Medicine, Chicago, IL
| | | | | | - Rod S Passman
- Northwestern University, Feinberg School of Medicine, Chicago, IL.
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Gimeno-Blanes FJ, Blanco-Velasco M, Barquero-Pérez Ó, García-Alberola A, Rojo-Álvarez JL. Sudden Cardiac Risk Stratification with Electrocardiographic Indices - A Review on Computational Processing, Technology Transfer, and Scientific Evidence. Front Physiol 2016; 7:82. [PMID: 27014083 PMCID: PMC4780431 DOI: 10.3389/fphys.2016.00082] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 02/19/2016] [Indexed: 11/22/2022] Open
Abstract
Great effort has been devoted in recent years to the development of sudden cardiac risk predictors as a function of electric cardiac signals, mainly obtained from the electrocardiogram (ECG) analysis. But these prediction techniques are still seldom used in clinical practice, partly due to its limited diagnostic accuracy and to the lack of consensus about the appropriate computational signal processing implementation. This paper addresses a three-fold approach, based on ECG indices, to structure this review on sudden cardiac risk stratification. First, throughout the computational techniques that had been widely proposed for obtaining these indices in technical literature. Second, over the scientific evidence, that although is supported by observational clinical studies, they are not always representative enough. And third, via the limited technology transfer of academy-accepted algorithms, requiring further meditation for future systems. We focus on three families of ECG derived indices which are tackled from the aforementioned viewpoints, namely, heart rate turbulence (HRT), heart rate variability (HRV), and T-wave alternans. In terms of computational algorithms, we still need clearer scientific evidence, standardizing, and benchmarking, siting on advanced algorithms applied over large and representative datasets. New scenarios like electronic health recordings, big data, long-term monitoring, and cloud databases, will eventually open new frameworks to foresee suitable new paradigms in the near future.
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Affiliation(s)
| | - Manuel Blanco-Velasco
- Department of Signal Theory and Communications, University of de Alcalá Alcalá de Henares, Spain
| | - Óscar Barquero-Pérez
- Department of Signal Theory and Communications, Rey Juan Carlos University Fuenlabrada, Spain
| | | | - José L Rojo-Álvarez
- Department of Signal Theory and Communications, Rey Juan Carlos University Fuenlabrada, Spain
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Abstract
OBJECTIVES Cardiac autonomic modulation and baroreflex sensitivity are altered in individuals with essential hypertension. Hypertension is considered as a strong and independent risk factor for supraventricular and ventricular arrhythmias. The aim of the present study was to evaluate cardiac autonomic control and the arrhythmogenic risk by using 24-h heart rate variability (HRV) and heart rate turbulence (HRT) analysis in essential hypertension without left ventricular hypertrophy (LVH). METHODS Fifty-eight newly diagnosed untreated hypertensive patients without LVH (mean age 51 ± 12 years, 26 women) and 56 adult, healthy volunteers (mean age 49 ± 12 years, 24 women) were included in the study. Subjects with secondary causes of hypertension or autonomic dysfunction were excluded. The diagnosis of hypertension was based on ambulatory blood pressure monitoring results. Time-domain HRV parameters and HRT parameters were calculated from 24-hour Holter recordings. RESULTS Values of SDNN and SDANN in the hypertension group were significantly lower than in the control group (P < 0.01 and P < 0.01, respectively). At least one of the turbulence onset (TO) and turbulence slope (TS) values were found abnormal in 10 of 32 hypertensive patients and in 5 of 24 control individuals (P = 0.38). There was no significant difference between HRT parameters, TO and TS (P = 0.67 and P = 0.12, respectively). CONCLUSIONS Sympathetic tone begins to increase in hypertension before LVH develops. However, the impact of this increase on HRT is not clear. There is a need for further research to investigate the impact of hypertension and LVH on HRT.
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Yuan MJ, Pan YS, Hu WG, Lu ZG, Zhang QY, Huang D, Huang XL, Wei M, Li JB. A pilot study of prognostic value of non-invasive cardiac parameters for major adverse cardiac events in patients with acute coronary syndrome treated with percutaneous coronary intervention. Int J Clin Exp Med 2015; 8:22440-22449. [PMID: 26885226 PMCID: PMC4730012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 11/11/2015] [Indexed: 06/05/2023]
Abstract
The objective of this study was to determine the combination of left ventricular ejection fraction (LVEF) and individual electrocardiographic parameters related to abnormal depolarization/repolarization or baroreceptor sensitivity that had the best predictive value for major adverse cardiac events (MACE) in patients with acute coronary syndrome (ACS). Patients with ACS who underwent coronary angiography and percutaneous coronary intervention (PCI) were included in this prospective study. Ventricular late potential (VLP), heart rate turbulence (HRT), heart rate variability (HRV), and T wave alternans (TWA) parameters were measured using 24 h Holter monitoring 2-4 weeks after onset of ACS. Initial and follow-up LVEF was measured by ultrasound. Patients were followed for at least 6 months to record the occurrence of MACE. Models using combinations of the individual independent prognostic factors found by multivariate analysis were then constructed to use for estimation of risk of MACE. In multivariate analysis, VLP measured as QRS duration, HRV measured as standard deviation of normal RR intervals, and followup LVEF, but none of the other parameters studied, were independent risk factors for MACE. Areas under ROC curve (AUCs) for combinations of 2 or all 3 factors ranged from 0.73 to 0.76. Combinations of any of the three independent risk factors for MACE in ACS patients with PCI improved prediction and, because these risk factors were obtained non-invasively, may have future clinical usefulness.
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Affiliation(s)
- Min-Jie Yuan
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital Shanghai, China
| | - Ye-Sheng Pan
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital Shanghai, China
| | - Wei-Guo Hu
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital Shanghai, China
| | - Zhi-Gang Lu
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital Shanghai, China
| | - Qing-Yong Zhang
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital Shanghai, China
| | - Dong Huang
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital Shanghai, China
| | - Xiao-Li Huang
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital Shanghai, China
| | - Meng Wei
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital Shanghai, China
| | - Jing-Bo Li
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital Shanghai, China
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Stöckigt F, Jüngst P, Linhart M, Nickenig G, Andrié R, Beiert T, Schrickel JW. Association of Heart Rate Turbulence With Arrhythmia Susceptibility and Heart Disease in Mice. J Cardiovasc Electrophysiol 2015. [PMID: 26222888 DOI: 10.1111/jce.12766] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Recent studies have demonstrated the feasibility of measuring heart rate turbulence (HRT) as a marker of baroreflex function in healthy mice. The aim of this investigation was to measure HRT in a mouse model with induced structural heart defects and to determine if there were threshold values of HRT for inducible ventricular tachycardias (VTs). METHODS AND RESULTS HRT was measured during electrophysiological investigations 2 weeks after transverse aortic constriction (TAC, n = 13) or myocardial cryoinfarction (MCI, n = 14). Sham-operated mice served as controls (n = 8 for TAC controls and n = 9 for MCI controls). Mice with heart disease lacked an early acceleration (turbulence onset [TO]) in heart rate after extrastimulus pacing (heart disease: 0.39% [0.19%-0.59%] vs. all controls: -0.04% [-0.25-0.19%]; P < 0.01). At a cutoff value of >0.25%, TO could be used to classify mice with induced heart disease with a sensitivity of 64.0% and specificity of 88.2% (P < 0.01) but did not identify mice at higher risk of induced VTs. Animals that were susceptible to VTs (n = 8) had lower values for turbulence slope (TS) compared with noninducible mice (6.2 milliseconds/beat [3.1-9.5 milliseconds/beat] vs. 10.1 milliseconds/beat [7.2-14.2 milliseconds/beat]; P = 0.03). TS <7.8 milliseconds/beat identified mice with inducible VTs with a sensitivity of 75.0% and specificity of 75.8% (P = 0.02). CONCLUSION Measurement of HRT is feasible in mouse models with induced structural heart disease. More abnormal values for TO were found in the presence of structural heart disease but did not predict susceptibility to VTs. Decreased TS was associated with VTs induced by programmed stimulation.
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Affiliation(s)
- Florian Stöckigt
- University Hospital Bonn, Department of Medicine-Cardiology, Sigmund Freud, Bonn, Germany
| | - Philipp Jüngst
- University Hospital Bonn, Department of Medicine-Cardiology, Sigmund Freud, Bonn, Germany
| | - Markus Linhart
- University Hospital Bonn, Department of Medicine-Cardiology, Sigmund Freud, Bonn, Germany
| | - Georg Nickenig
- University Hospital Bonn, Department of Medicine-Cardiology, Sigmund Freud, Bonn, Germany
| | - René Andrié
- University Hospital Bonn, Department of Medicine-Cardiology, Sigmund Freud, Bonn, Germany
| | - Thomas Beiert
- University Hospital Bonn, Department of Medicine-Cardiology, Sigmund Freud, Bonn, Germany
| | - Jan Wilko Schrickel
- University Hospital Bonn, Department of Medicine-Cardiology, Sigmund Freud, Bonn, Germany
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Średniawa B, Mitręga KA, Cebula S, Morawski S, Kowalczyk J, Musialik-Łydka A, Kalarus Z. Gender-dependent profile of heart rate turbulence parameters in patients after acute myocardial infarction treated invasively. Kardiol Pol 2015. [PMID: 26202535 DOI: 10.5603/kp.a2015.0141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND AND AIM The aim of this study was to determine whether gender is related to differences in heart rate turbulence (HRT) parameters and the authors' own predefined HRT categories comprising turbulence timing (TT) in patients at the early stage of acute myocardial infarction (AMI) treated invasively. METHODS We analysed 489 consecutive patients (147 females and 342 males, aged 63.9 ± 11.7 years) with AMI admitted to our department and treated invasively on admission to the hospital. On the fifth day after MI 24-h digital Holter recordings were performed to assess HRT, and the following HRT parameters were calculated in all patients using the HRTView pro-gram: turbulence onset (TO, %), slope (TS, ms/RR interval), and TT. The following values of HRT parameters were considered abnormal: TO ≥ 0, TS ≤ 2.5, and TT ≥ 10. Based on the abovementioned parameters, the authors defined their own HRT categories (A, B, C): A - comprising three normal parameters, B - one abnormal parameter, C - three abnormal parameters. RESULTS TT was significantly later in women than in men: 7.5 ± 3.1 vs. 6.8 ± 3.1 (p < 0.05), respectively. When analysing the authors' own predefined HRT categories, significant differences between women and men were present in the occurrence of the category C, including all three abnormal HRT parameters: TO, TS, and TT. CONCLUSIONS In women worse TT was present and all three abnormal HRT parameters occurred more frequently. HRT in women after AMI is profoundly altered compared to in men. This indicates greater autonomic dysfunction and higher risk for sudden cardiac death in women after AMI.
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Affiliation(s)
- Beata Średniawa
- I Klinika Kardiologii, Wrodzonych Wad Serca i Elektroterapii SUM.
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Perkiömäki J, Exner DV, Piira OP, Kavanagh K, Lepojärvi S, Talajic M, Karvonen J, Philippon F, Junttila J, Coutu B, Huikuri H. Heart Rate Turbulence and T-Wave Alternans in Patients with Coronary Artery Disease: The Influence of Diabetes. Ann Noninvasive Electrocardiol 2015; 20:481-7. [PMID: 25589197 DOI: 10.1111/anec.12244] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Patients with diabetes mellitus (DM) have a higher risk of sudden cardiac death. Factors associated with the risk profiles of coronary artery disease (CAD) patients with DM are not well established. Heart rate turbulence (HRT) and T-wave alternans (TWA) are often used to predict arrhythmia events. METHODS AND RESULTS HRT and TWA were measured in two independent groups: the ARTEMIS cohort study and the REFINE-ICD randomized trial. ARTEMIS assesses risk 3-12 months after coronary angiography in patients with CAD. The initial 1001 patients in ARTEMIS, 526 with and 475 without DM, are included in this analysis. REFINE-ICD compares usual care versus usual care plus ICD therapy in patients with left ventricular (LV) ejection fraction (EF) values of 36-50% assessed 2-15 months after myocardial infarction. The initial 275 patients screened in REFINE ICD are included in this analysis. Abnormal HRT plus TWA was more common in patients with versus without DM in ARTEMIS (125/526, 24% vs 63/475, 13%; P < 0.001) and REFINE-ICD (43/55, 78% vs 55/220, 25%; P < 0.001), respectively. Abnormal HRT plus TWA was also more common in patients with LVEF values < 50% (28%) vs ≥ 50% (18%; P < 0.001) in ARTEMIS and LVEF values below the population median of 42% (60/138, 43%) versus above the median (38/137, 28%; P < 0.01) in REFINE-ICD. CONCLUSIONS Abnormal HRT plus TWA is more common in CAD patients with DM compared with the patients without DM and is related to the severity of LV dysfunction. CLINICAL TRIAL REGISTRATION INFORMATION http://www.clinicaltrials.gov, NCT01426685; http://www.clinicaltrials.gov, NCT00673842.
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Affiliation(s)
- Juha Perkiömäki
- Division of Cardiology, Institute of Clinical Medicine, University of Oulu, and University Hospital of Oulu, Finland
| | - Derek V Exner
- Libin Cardiovascular Institute of Alberta, Calgary, Alberta, Canada
| | - Olli-Pekka Piira
- Division of Cardiology, Institute of Clinical Medicine, University of Oulu, and University Hospital of Oulu, Finland
| | | | - Samuli Lepojärvi
- Division of Cardiology, Institute of Clinical Medicine, University of Oulu, and University Hospital of Oulu, Finland
| | - Mario Talajic
- Cardiology, Montreal Heart Institute, Montreal, Quebec, Canada
| | - Jarkko Karvonen
- Division of Cardiology, Institute of Clinical Medicine, University of Oulu, and University Hospital of Oulu, Finland
| | | | - Juhani Junttila
- Division of Cardiology, Institute of Clinical Medicine, University of Oulu, and University Hospital of Oulu, Finland
| | - Benoit Coutu
- Centre Hopital University of Montreal, Montreal, Quebec, Canada
| | - Heikki Huikuri
- Division of Cardiology, Institute of Clinical Medicine, University of Oulu, and University Hospital of Oulu, Finland
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Bissinger A, Ruxer J, Ahmed RB, Lubinski A. Heart rate turbulence in patients with poorly controlled diabetes mellitus type 2. Arch Med Sci 2014; 10:1073-7. [PMID: 25624841 PMCID: PMC4296065 DOI: 10.5114/aoms.2014.47819] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Revised: 11/02/2012] [Accepted: 01/26/2013] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Cardiac autonomic neuropathy (CAN) causes substantial morbidity and increased mortality in patients with diabetes mellitus (DM). Besides heart rate variability (HRV), heart rate turbulence (HRT) is an important method of assessment of cardiac autonomic regulation. The aim of the study was to assess the correlation between HRT and diabetic control. MATERIAL AND METHODS Fifty-nine patients met the inclusion criteria - 38 males and 21 females, age 64.4 ±7.6. The patients included had inadequately controlled DM type 2 defined as glycated haemoglobin (HbA1c) > 9% (mean 11.8 ±2.7%). In all patients, intensive insulin treatment had been applied for 6 months. After 6 months, HbA1c was measured. ECG Holter monitoring was performed before and after insulin treatment to evaluate the time domain HRV and HRT parameters (turbulence onset (TO) and turbulence slope (TS)). RESULTS After 6 months of intensive insulin treatment, HbA1c concentrations ranged from 6.3% (45 mmol/mol) to 11.2% (99 mmol/mol) - mean 8.5 ±3.8% (69 ±18 mmol/mol). Significant improvement of TO, TS and SDNN was observed. The TO and TS significantly correlated with HbA1c (r = 0.35, p = 0.006 and r = -0.31, p = 0.02 respectively). Among analyzed HRV time domain parameters such as SDNN, rMSSD and pNN50, only SDNN correlated with HbA1c (r = -0.41, p = 0.001). It was further concluded that intensive insulin therapy led to better glycemic control, resulting in improvement of HRT. CONCLUSIONS Heart rate turbulence may be useful in monitoring changes of the autonomic nervous system functions in patients with DM, similarly to HRV parameters.
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Affiliation(s)
- Andrzej Bissinger
- Department of Invasive Cardiology and Cardiodiabetology, Medical University of Lodz, Lodz, Poland
| | - Jan Ruxer
- Department of Invasive Cardiology and Cardiodiabetology, Medical University of Lodz, Lodz, Poland
| | - Rehana B Ahmed
- Department of Invasive Cardiology and Cardiodiabetology, Medical University of Lodz, Lodz, Poland
| | - Andrzej Lubinski
- Department of Invasive Cardiology and Cardiodiabetology, Medical University of Lodz, Lodz, Poland
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Bienias P, Kostrubiec M, Rymarczyk Z, Korczak D, Ciurzyński M, Kurzyna M, Torbicki A, Fijałkowska A, Pruszczyk P. Severity of arterial and chronic thromboembolic pulmonary hypertension is associated with impairment of heart rate turbulence. Ann Noninvasive Electrocardiol 2014; 20:69-78. [PMID: 24903540 DOI: 10.1111/anec.12169] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Heart rate turbulence (HRT) impairment is a validated and an independent indicator of cardiovascular death. There are limited data on HRT in pulmonary hypertension (PH), so we assessed potential HRT alterations in PH, especially in relation to its severity. METHODS Thirty-three out of 41 patients were enrolled in the study aged 49.7 ± 15.9 years (22 with arterial, 11 with chronic thromboembolic PH). Routine evaluations, right heart catheterization, and 24-hour Holter monitoring with heart rate variability and HRT assessment were performed. RESULTS HRT was significantly impaired in PH patients, as compared to 25 healthy controls: mean turbulence onset (TO) was -0.27% versus -2.60% (P < 0.0001), and median turbulence slope (TS) was 3.13 versus 13.5 msRR (P < 0.0001). Abnormal HRT (TO ≥ 0.0% and/or TS ≤ 2.5 ms/RR) was found in 63.3% of PH patients. Patients with PH and abnormal HRT presented more compromised functional, biochemical, and hemodynamic status than PH patients with normal TO and TS values. Multivariate stepwise regression analysis showed that TO value was related to oxygen desaturation <90% in 6-minute walking test (6-MWT; OR 0.41, P < 0.001) and was related to N-Terminal pro-B type Natriuretic Peptide concentration (OR 0.40, P < 0.001); TS was related to 6-MWT distance (OR 0.53, P < 0.0001). CONCLUSIONS Patients with arterial or chronic thromboembolic PH are characterized by significant impairment of HRT which is related to the disease severity. We hypothesize that patients with abnormal HRT could be considered as subjects with an increased risk of cardiovascular death, however, it needs further investigation.
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Affiliation(s)
- Piotr Bienias
- Department of Internal Medicine and Cardiology with The Centre of Diagnosis and Treatment of Venous Thromboembolic Disease, The Medical University of Warsaw, Warsaw, Poland
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Poręba M, Poręba R, Gać P, Usnarska-Zubkiewicz L, Pilecki W, Piotrowicz E, Piotrowicz R, Rusiecki L, Kuliczkowski K, Mazur G, Sobieszczańska M. Heart rate variability and heart rate turbulence in patients with hematologic malignancies subjected to high-dose chemotherapy in the course of hematopoietic stem cell transplantation. Ann Noninvasive Electrocardiol 2013; 19:157-65. [PMID: 24206437 DOI: 10.1111/anec.12108] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND In hematological malignancies, remissions and cures may be achieved by hematopoietic stem cell transplantation (HSCT) following high-dose chemotherapy (HDC). Cardiotoxicity of such therapy has not yet been fully elucidated. Noninvasive approaches allowing to evaluate an autonomic control of the heart function include analyses of both heart rate variability (HRV) and heart rate turbulence (HRT). METHODS In 38 patients with hematological malignancies, 24-hour electrocardiography Holter monitoring , with HRV and HRT analysis before HSCT (A test) and after HSCT (B test), was performed. RESULTS The 24-hour analysis of HRV demonstrated that SDNN, SDNNi, rMSSD, and pNN50 parameters were significantly lower after HSCT as compared to the results obtained before the transplantation (P < 0.05). For period of diurnal activity and for night hours, SDANN, SDNNi, rMSSD, and pNN50 were significantly lower in B test, as compared to the results of A test (P < 0.05). The analysis of HRT demonstrated that turbulence onset parameter was significantly higher, and turbulence slope parameter was significantly lower in B test, as compared to A test (P < 0.05). The multifactorial stepwise backward regression analysis indicated that administration of cyclophosphamide and carmustine and higher concentrations of blood cholesterol represented risk factors for decreased HRV. Cyclophosphamide and higher triglyceride levels represented independent risk factors for decreased HRT. CONCLUSIONS In patients with hematopoietic malignancies treated with HSCT, decreased HRV and HRT were observed after chemotherapy and stem cells administration.
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Affiliation(s)
- Małgorzata Poręba
- Department of Pathophysiology, Wroclaw Medical University, Wroclaw, Poland
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Arisha MM, Girerd N, Chauveau S, Bresson D, Scridon A, Bonnefoy E, Chevalier P. In-hospital heart rate turbulence and microvolt T-wave alternans abnormalities for prediction of early life-threatening ventricular arrhythmia after acute myocardial infarction. Ann Noninvasive Electrocardiol 2013; 18:530-7. [PMID: 24147791 DOI: 10.1111/anec.12072] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND In the setting of primary prevention, most implantable cardiac defibrillators (ICD) are implanted more than 6 months after acute myocardial infarction (AMI). Abnormal heart rate turbulence (HRT) and T-wave alternans (TWA) are predictors of long-term sudden cardiac death (SCD). We intended to assess the predictive value of HRT and TWA for early post-AMI SCD and life-threatening ventricular arrhythmias (VA). METHODS One hundred ninety-nine consecutive patients with AMI were prospectively included (age 61.7 years, LV ejection fraction 45%). One hundred eighty-three patients (92%) underwent percutaneous coronary intervention. We assessed HRT using turbulence slope (TS), turbulence onset (TO), and TWA on channels 1 and 2 (TWA1 and TWA2) using the modified moving average method. Predictive performance for SCD/VA was assessed by area under the receiver operating curve characteristic (ROC-AUC). RESULTS Within 6 months after AMI, 2 patients (1%) developed life-threatening VA and 3 (1.5%) experienced SCD. TO and TWA1 had poor ROC-AUC (both 0.64) whereas TS and TWA2 failed to show any predictive performance (ROC-AUC 0.48 and 0.57, respectively). When combining TO and TWA1, ROC-AUC increased to 0.80. Importantly, when considering the subset of patients with a LV ejection fraction ≤40%, the combined variable of TO and TWA1 remained strongly predictive of a short-term event (ROC-AUC 0.86). CONCLUSIONS Combined assessment of HRT and TWA showed a high predictive performance for SCD or life-threatening VA within 6 months after AMI. This combined Holter ECG index could be useful to identify high-risk patients who might benefit from early ICD implantation.
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Affiliation(s)
- Mohamed Moussa Arisha
- Department of Rhythmology, Hospices Civils de Lyon, Louis Pradel Cardiovascular Hospital, Lyon, France
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31
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Abstract
Heart rate turbulence (HRT) is a baroreflex-mediated biphasic reaction of heart rate in response to premature ventricular beats. Heart rate turbulence is quantified by: turbulence onset (TO) reflecting the initial acceleration of heart rate following premature beat and turbulence slope (TS) describing subsequent deceleration of heart rate. Abnormal HRT identifies patients with autonomic dysfunction or impaired baroreflex sensitivity due to variety of disorders, but also may reflect changes in autonomic nervous system induced by different therapeutic modalities such as drugs, revascularization, or cardiac resynchronization therapy. More importantly, impaired HRT has been shown to identify patients at high risk of all-cause mortality and sudden death, particularly in postinfarction and congestive heart failure patients. It should be emphasized that abnormal HRT has a well-established role in stratification of postinfarction and heart failure patients with relatively preserved left ventricular ejection fraction. The ongoing clinical trials will document whether HRT can be used to guide implantation of cardioverter-defibrillators in this subset of patients, not covered yet by ICD guidelines. This review focuses on the current state-of-the-art knowledge regarding clinical significance of HRT in detection of autonomic dysfunction and regarding the prognostic significance of this parameter in predicting all-cause mortality and sudden death.
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Affiliation(s)
- Iwona Cygankiewicz
- Department of Electrocardiology, Medical University of Lodz, Sterling Regional Center for Heart Diseases, 91-425 Lodz, Poland.
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Harris PRE, Stein PK, Fung GL, Drew BJ. Prognostic value of heart rate turbulence for risk assessment in patients with unstable angina and non-ST elevation myocardial infarction. Vasc Health Risk Manag 2013; 9:465-73. [PMID: 23976860 PMCID: PMC3747117 DOI: 10.2147/vhrm.s43654] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Background We sought to examine the prognostic value of heart rate turbulence derived from electrocardiographic recordings initiated in the emergency department for patients with non-ST elevation myocardial infarction (NSTEMI) or unstable angina. Methods Twenty-four-hour Holter recordings were started in patients with cardiac symptoms approximately 45 minutes after arrival in the emergency department. Patients subsequently diagnosed with NSTEMI or unstable angina who had recordings with ≥18 hours of sinus rhythm and sufficient data to compute Thrombolysis In Myocardial Infarction (TIMI) risk scores were chosen for analysis (n = 166). Endpoints were emergent re-entry to the cardiac emergency department and/or death at 30 days and one year. Results In Cox regression models, heart rate turbulence and TIMI risk scores together were significant predictors of 30-day (model chi square 13.200, P = 0.001, C-statistic 0.725) and one-year (model chi square 31.160, P < 0.001, C-statistic 0.695) endpoints, outperforming either measure alone. Conclusion Measurement of heart rate turbulence, initiated upon arrival at the emergency department, may provide additional incremental value in the risk assessment for patients with NSTEMI or unstable angina.
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Affiliation(s)
- Patricia R E Harris
- School of Nursing, Department of Physiological Nursing, University of California, San Francisco, CA 94143-0610, USA.
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Wongcharoen W, Khienprasit K, Phrommintikul A, Sukonthasarn A, Chattipakorn N. Heart rate variability and heart rate turbulence in HIV-infected patients receiving combination antiretroviral therapy. Ann Noninvasive Electrocardiol 2013; 18:450-6. [PMID: 24047489 DOI: 10.1111/anec.12064] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Previous studies have demonstrated the presence of autonomic dysfunction in human immunodeficiency virus (HIV)-infected patients. However, the data in those receiving combination antiretroviral therapy (cART) are conflicting. The aim of this study was to assess the autonomic function using heart rate variability (HRV) and heart rate turbulence (HRT) analysis in HIV-infected patients receiving cART. METHODS Eighty-one HIV-infected patients receiving cART and 42 control subjects were enrolled in the study. The HRV and HRT parameters were assessed on 24-hour digital Holter electrocardiogram recordings. RESULTS Baseline characteristics were comparable between HIV-infected and control subjects, except the higher fasting glucose and triglyceride and lower high-density lipoprotein cholesterol observed in HIV-infected patients. All components of HRV were significantly reduced in HIV-infected patients. After adjustment with biochemical parameters, most of the HRV parameters were still significantly reduced in HIV-infected patients. However, HRV parameters reflecting vagal activity were no longer different between 2 groups. In addition, HRT parameters did not differ between HIV-infected and control subjects. The standard deviation of normal-to-normal intervals significantly correlated with CD4 lymphocyte counts in HIV-infected patients but did not with protease inhibitors therapy. CONCLUSIONS We demonstrated the overall decrease in HRV in HIV-infected patients receiving cART. The metabolic disturbance observed in HIV-infected patients possibly accounted for decreased vagal activity.
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Affiliation(s)
- Wanwarang Wongcharoen
- Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Cardiac Electrophysiology Research and Training Center, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
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Erdem A, Ayhan SS, Öztürk S, Özlü MF, Alcelik A, Sahin S, Tosun M, Erdem FH, Gumustekin K, Yazici M. Cardiac autonomic function in healthy young smokers. Toxicol Ind Health 2012; 31:67-72. [PMID: 23235997 DOI: 10.1177/0748233712468024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The present study examined the heart rate turbulence (HRT) and heart rate variability (HRV) parameters in healthy young smokers (<40 years) to assess the effects of smoking on cardiac autonomic function. The study included 75 smokers with a history of habitual smoking for at least 1 year (41 males and 34 females; mean age, 29.3 ± 7.3 years) and 30 nonsmokers (hospital staff; 16 males and 14 females; mean age, 29.0 ± 6.1 years). Addiction to smoking was evaluated using the modified Fagerström test for nicotine-dependence index (NDI). HRT, HRV, basic clinical and echocardiographic, and Holter test parameters were compared between groups. No significant differences between the two groups were found in the basic clinical and echocardiographic variables. Turbulence onset (TO) was significantly higher in the smoking group than in the controls, and turbulence slope was significantly lower in the smokers, than in the controls (p < 0.05). Standard deviation of all normal-to-normal (NN) interval index (SDNNI) was the only HRV parameter that was significantly different between the smoking and control groups (p < 0.05). The NDI was positively correlated with the TO (p < 0.05). Smoking impairs the baroregulatory function in healthy young smokers, particularly the HRT parameters and SDNNI. Our findings highlight the importance of complete smoking cessation.
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Affiliation(s)
- Alim Erdem
- Faculty of Medicine, Abant Izzet Baysal University, Bolu, Turkey Government Hospital, Sivas, Turkey
| | - Suzi Selim Ayhan
- Faculty of Medicine, Abant Izzet Baysal University, Bolu, Turkey
| | - Serkan Öztürk
- Faculty of Medicine, Abant Izzet Baysal University, Bolu, Turkey
| | | | - Aytekin Alcelik
- Faculty of Medicine, Abant Izzet Baysal University, Bolu, Turkey
| | | | - Mehmet Tosun
- Faculty of Medicine, Abant Izzet Baysal University, Bolu, Turkey
| | | | - Kenan Gumustekin
- Faculty of Medicine, Abant Izzet Baysal University, Bolu, Turkey
| | - Mehmet Yazici
- Faculty of Medicine, Abant Izzet Baysal University, Bolu, Turkey
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Abstract
Heart rate turbulence (HRT) is the baroreflex-mediated short-term oscillation of cardiac cycle lengths after spontaneous ventricular premature complexes. HRT is composed of a brief heart rate acceleration followed by a gradual heart rate deceleration. In high risk patients after myocardial infarction (MI) HRT is blunted or diminished. Since its first description in 1999 HRT emerged as one of the most potent risk factors after MI. Predictive power of HRT has been studied in more than 10,000 post-infarction patients. This review is intended to provide an overview of HRT as risk-predictor after MI.
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Affiliation(s)
- Christine S. Zuern
- Innere Medizin III (Kardiologie), Eberhard-Karls-Universität TübingenTübingen, Germany
| | - Petra Barthel
- Medizinische Klinik, Technische Universität München UniversityMünchen, Germany
| | - Axel Bauer
- Innere Medizin III (Kardiologie), Eberhard-Karls-Universität TübingenTübingen, Germany
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Chen HY. Implications of turbulence slope variations in different approaches. Heart Int 2011; 6:e7. [PMID: 21977307 PMCID: PMC3184714 DOI: 10.4081/hi.2011.e7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2011] [Revised: 07/20/2011] [Accepted: 07/20/2011] [Indexed: 12/05/2022] Open
Abstract
Both heart rate variability (HRV) and heart rate turbulence (HRT) are established tools to study cardiac autonomic activity. Short-term studies of HRV had been reported to be stable for autonomic function assessment. However, there is little information on whether short-term HRT assessment is comparable to 24 h assessment. The aim of the study is to identify the relationship of HRT values between the 24 h and isolated tachogram measurements. We collected 24 h Holter recordings from 116 patients attending the outpatient department. HRT parameters were assessed for 24 h. Using the conventional method, HRT parameters were calculated using the average of tachograms over long-term recordings. In an alternative method, HRT parameters were obtained from each tachogram. We calculated a mean value for each subject by averaging the whole HRT data of every tachogram. Correlation analysis between the two groups of HRT values was performed. The results showed a high correlation between the two methods in turbulence slope (TS) (P<0.001; r=0.84) and an extremely significant correlation in turbulence onset (TO) (P<0.001; r=0.99). The values of TS were increased when assessed by separate tachogram. The variations became prominent when TS values calculated by the conventional method were low. HRT is as useful by separate tachogram assessment as by the standard Holter recordings. However, the TS values should be redefined. In subjects with abnormal turbulence slope (<2.5) calculated by averaging long-term recordings, the possibility of TS values blunted by diverse regression slope sequences in separate tachograms should be taken into consideration.
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Affiliation(s)
- Hung Yi Chen
- Department of Cardiology, Taipei City Hospital- Heping Branch, Taiwan
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Malberg H, Bauernschmitt R, Meyerfeldt U, Schirdewan A, Wessel N. Short-term heart rate turbulence analysis versus variability and baroreceptor sensitivity in patients with dilated cardiomyopathy. Indian Pacing Electrophysiol J 2004; 4:162-75. [PMID: 16943930 PMCID: PMC1540702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
New methods for the analysis of arrhythmias and their hemodynamic consequences have been applied in risk stratification, in particular to patients after myocardial infarction. This study investigates the suitability of short-term heart rate turbulence (HRT) analysis in comparison to heart rate and blood pressure variability as well as baroreceptor sensitivity analyses to characterise the regulatory differences between patients with dilated cardiomyopathy (DCM) and healthy controls. In this study, 30 minutes data of non-invasive continuous blood pressure and ECGs of 37 DCM patients and 167 controls measured under standard resting conditions were analysed. The results show highly significant differences between DCM patients and controls in heart rate and blood pressure variability as well as in baroreceptor sensitivity parameters. Applying a combined heart rate-blood pressure trigger, ventricular premature beats were detected in 24.3% (9) of the DCM patients and 11.3% (19) of the controls. This fact demonstrates the limited applicability of short-term HRT analyses. However, the HRT parameters showed significant differences in this subgroup with ventricular premature beats (turbulence onset: DCM: 1.80+/-2.72, controls: - 4.34+/-3.10, p<0.001; turbulence slope: DCM: 6.75+/-5.50, controls: 21.30+/-17.72, p=0.021). Considering all (including HRT) parameters in the subgroup with ventricular beats, a discrimination rate between DCM patients and controls of 88.0% was obtained (max. 6 parameters). The corresponding value obtained for the total group was 86.3% (without HRT parameters). Comparable classification rates and high correlations between heart rate turbulence and variability and baroreflex parameters point to a more universal applicability of the latter methods.
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Affiliation(s)
- Hagen Malberg
- Forschungszentrum Karlsruhe GmbH (Karlsruhe Research Center), Institute for Applied Computer Science, P.O. Box 3640, D-76021 Karlsruhe, Germany.
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