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von Falkenhausen AS, Freudling R, Waldenberger M, Gieger C, Peters A, Müller-Nurasyid M, Kääb S, Sinner MF. Common electrocardiogram measures are not associated with telomere length. Aging (Albany NY) 2022; 14:5620-5627. [PMID: 35787517 PMCID: PMC9365565 DOI: 10.18632/aging.204149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 06/14/2022] [Indexed: 11/25/2022]
Abstract
AIMS Aging is accompanied by telomere shortening. Increased telomere shortening is considered a marker of premature aging. Cardiac aging results in the development of cardiac pathologies. Electrocardiogram (ECG) measures reflect cardiac excitation, conduction, and repolarization. ECG measures also prolong with aging and are associated with cardiac pathologies including atrial fibrillation. As premature prolongation of ECG measures is observed, we hypothesized that such prolongation may be associated with telomere length. METHODS AND RESULTS We studied the large, community-based KORA F4 Study. Of 3,080 participants enrolled between 2006 and 2007 with detailed information on demographic, anthropometric, clinical, and ECG characteristics, 2,575 presented with available data on leukocyte telomere length. Telomere length was determined by real-time quantitative PCR and expressed relative to a single copy gene. We fitted multivariable adjusted linear regression models to associate the ECG measures RR-interval, PR-interval, QRS-duration, and heart rate corrected QTc with telomere length. In our cohort, the mean age was 54.9±12.9 years and 46.6% were men. Increased age was associated with shorter telomere length (p<0.01), and men had shorter telomere length than women (p<0.05). In unadjusted models, heart rate (p=0.023), PR-interval (p<0.01), and QTc-interval (p<0.01) were significantly associated with shorter telomere length. However, no significant associations remained after accounting for age, sex, and covariates. CONCLUSIONS ECG measures are age-dependent, but not associated with shortened telomere length as a marker of biological aging. Further research is warranted to clarify if shortened telomeres are associated with clinical cardiac pathologies including atrial fibrillation.
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Affiliation(s)
- Aenne S von Falkenhausen
- Department of Cardiology, University Hospital, LMU Munich, Munich, Germany.,German Centre for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, Munich, Germany
| | - Rebecca Freudling
- Department of Cardiology, University Hospital, LMU Munich, Munich, Germany
| | - Melanie Waldenberger
- German Centre for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, Munich, Germany.,Institute of Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany.,Research Unit Molecular Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Christian Gieger
- German Centre for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, Munich, Germany.,Institute of Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany.,Research Unit Molecular Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Annette Peters
- Institute of Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany.,Research Unit Molecular Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany.,Institute for Medical Information Processing, Biometry and Epidemiology, Medical Faculty, LMU Munich, Munich, Germany
| | - Martina Müller-Nurasyid
- Institute of Genetic Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany.,Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Center, Johannes Gutenberg University, Mainz, Germany.,Pettenkofer School of Public Health Munich, Institute for Medical Information Processing, Biometry and Epidemiology, Medical Faculty, LMU Munich, Munich, Germany
| | - Stefan Kääb
- Department of Cardiology, University Hospital, LMU Munich, Munich, Germany.,German Centre for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, Munich, Germany
| | - Moritz F Sinner
- Department of Cardiology, University Hospital, LMU Munich, Munich, Germany.,German Centre for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, Munich, Germany
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Stone E, Zhou Y, Jelinek H, Mclachlan CS. Baseline Framingham risk score does not predict future ECG-derived QRS duration over an average of 3.3 years. INTERNATIONAL JOURNAL OF ARRHYTHMIA 2020. [DOI: 10.1186/s42444-020-00024-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Prolonged electrocardiogram (ECG) QRS duration has been associated with increased cardiovascular risk. It is unclear whether the main predictor of cardiovascular risk, the Framingham risk score also predicts short-term changes in ECG QRS duration. Our aim is to determine whether baseline Framingham risk score is associated with baseline or changes in QRS duration.
Methods
A retrospective cross-sectional analysis was performed using observational data obtained from two hundred two participants. Framingham risk score was calculated using an online risk calculator. QRS duration was obtained using a 10 s trace from a Welch Allyn PC-based 12-lead ECG system.
Results
Average follow-up duration was 3.3 ± 1.1 years. Mean QRS change was 1.8 ± 11.4 ms. Specifically, among two hundred two participants, there are 104 subjects with a greater QRS duration at follow-up, while 98 subjects had the same or a shorter follow-up QRS duration. Baseline Framingham risk score did not significantly predict an increase in QRSd with an odds ratio of 1.04 (P = 0.230). Regression analysis of QRS duration at baseline and Framingham risk at baseline had a weak association (R2 = 0.020; P = 0.043). The Framingham risk score at follow-up was likewise has a weak association with follow-up QRS duration (R2 = 0.045; P = 0.002).
Conclusions
Our results do not demonstrate a statistically significant association between Framingham risk parameters and future QRS duration changes over longitudinal time. QRS duration had variable changes between baseline and follow-up. This might suggest that a longer period of follow-up is required to document more stable increases in QRS duration associated with ventricular pathology. A larger population study is needed to confirm our observations.
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Maeda T, Horiuchi T, Makino N. Epigenetic status of subtelomere of peripheral leukocytes corresponds to cardiographic parameters with a sex association. Geriatr Gerontol Int 2018; 18:1415-1419. [PMID: 29978589 DOI: 10.1111/ggi.13472] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 04/15/2018] [Accepted: 05/27/2018] [Indexed: 11/28/2022]
Abstract
AIM The telomere length of somatic cells is associated with systemic aging. The attrition of somatic telomere length is accelerated in pathological conditions, such as cardiovascular diseases. However, clinical parameters of cardiac function have not been well studied in this regard. The present study examined how cardiac function was affected by telomere length and the subtelomeric methylation of peripheral leukocytes. METHODS Telomere length was assessed by Southern blotting analysis of genomic DNA extracted from peripheral leukocytes. Subtelomeric methylation was assessed by comparison between the Southern blotting results with a restriction enzyme Msp I and those with Hpa II, a methylation-sensitive isoschizomer of Msp I. RESULTS The following parameters were associated with telomere length and/or the subtelomeric methylation status in a sex-associated manner: PR interval, the voltage of QRS complex, QRS interval, QT interval and T wave voltage in electrocardiogram; and ejection fraction, the diameter of the left ventricle at the end diastolic phase, aortic root diameter and inferior vena cava diameter in echocardiogram. CONCLUSIONS Cardiac function correlates not only with telomere length, but also with the distribution of the telomere length and subtelomeric DNA methylation status. These imply that the loss of young cells, the accumulation of old cells and the acceleration of such changes in the cell population relate to phenotypes of cardiac aging with relative sex specificity. Furthermore, the PR interval showed a very close association with telomeric parameters in both sexes. Hence, PR is the most reliable candidate as an indicator of biological aging in both sexes. Geriatr Gerontol Int 2018; 18: 1415-1419.
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Affiliation(s)
- Toyoki Maeda
- The Department of Internal Medicine, Kyushu University Beppu Hospital, Beppu, Japan
| | - Takahiko Horiuchi
- The Department of Internal Medicine, Kyushu University Beppu Hospital, Beppu, Japan
| | - Naoki Makino
- The Department of Internal Medicine, Kyushu University Beppu Hospital, Beppu, Japan
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Rodgers JL, Samal E, Mohapatra S, Panguluri SK. Hyperoxia-induced cardiotoxicity and ventricular remodeling in type-II diabetes mice. Heart Vessels 2017; 33:561-572. [PMID: 29209776 DOI: 10.1007/s00380-017-1100-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 12/01/2017] [Indexed: 12/14/2022]
Abstract
Hyperoxia, or supplemental oxygen, is regularly used in the clinical setting for critically ill patients in ICU. However, several recent studies have demonstrated the negative impact of this treatment in patients in critical care, including increased rates of lung and cardiac injury, as well as increased mortality. The purpose of this study was to determine the predisposition for arrhythmias and electrical remodeling in a type 2 diabetic mouse model (db/db), as a result of hyperoxia treatment. For this, db/db and their heterozygous controls were treated with hyperoxia (> 90% oxygen) or normoxia (normal air) for 72-h. Immediately following hyperoxia or normoxia treatments, mice underwent surface ECG. Excised left ventricles were used to assess ion channel expression, including for Kv1.4, Kv1.5, Kv4.2, and KChIP2. Serum cardiac markers were also measured, including cardiac troponin I and lactate dehydrogenase. Our results showed that db/db mice have increased sensitivity to arrhythmia. Normoxia-treated db/db mice displayed features of arrhythmia, including QTc and JT prolongation, as well as QRS prolongation. A significant increase in QRS prolongation was also observed in hyperoxia-treated db/db mice, when compared to hyperoxia-treated heterozygous control mice. Db/db mice were also shown to exhibit ion channel dysregulation, as demonstrated by down-regulation in Kv1.5, Kv4.2, and KChIP2 under hyperoxia conditions. From these results, we conclude that: (1) diabetic mice showed distinct pathophysiology, when compared to heterozygous controls, both in normoxia and hyperoxia conditions. (2) Diabetic mice were more susceptible to arrhythmia at normal air conditions; this effect was exacerbated at hyperoxia conditions. (3) Unlike in heterozygous controls, diabetic mice did not demonstrate cardiac hypertrophy as a result of hyperoxia. (4) Ion channel remodeling was also observed in db/db mice under hyperoxia condition similar to its heterozygous controls.
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Affiliation(s)
- Jennifer Leigh Rodgers
- Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, 12901 Bruce B. Downs Blvd., MDC-30, Tampa, FL, 33612, USA
| | - Eva Samal
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, USA
| | - Subhra Mohapatra
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, USA
| | - Siva Kumar Panguluri
- Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, 12901 Bruce B. Downs Blvd., MDC-30, Tampa, FL, 33612, USA.
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