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[Electrocardiographic changes and arrhythmias in the elderly]
1Institute of Clinical Medicine, University of Tsukuba.
Insights
Aging significantly impacts electrocardiographic (ECG) findings, increasing the prevalence of arrhythmias and conduction abnormalities. Normal ECGs decline with age, with specific conditions like atrial fibrillation and bundle branch blocks becoming more common.
Area of Science:
- Cardiology
- Geriatrics
- Electrophysiology
Context:
- The aging population experiences a higher burden of cardiovascular conditions.
- Conventional 12-lead electrocardiograms (ECGs) are fundamental diagnostic tools in cardiology.
- Understanding age-related ECG changes is crucial for accurate diagnosis and management.
Purpose:
- To investigate the association between chronological aging and the occurrence of electrocardiographic abnormalities and arrhythmias.
- To analyze trends in various ECG parameters across different age groups in individuals without known heart disease.
Summary:
- A study of 3,174 individuals (17-87 years) revealed a progressive decrease in normal ECG findings with age.
- The frequency of supraventricular and ventricular premature complexes, atrial fibrillation, bundle branch blocks, and hemiblocks increased with age.
- While some conditions like sinus bradycardia showed age-related increases after 55, others like AV blocks remained rare. Sex differences were noted in the prevalence of certain arrhythmias in older age strata.
Impact:
- Confirms aging as a significant factor contributing to abnormal ECG findings and arrhythmias.
- Highlights the need for age-specific interpretation of ECG results in clinical practice.
- Provides valuable data for understanding the electrophysiological changes associated with normal aging.
Abstract:
To evaluate the relationship between aging and electrocardiographic abnormalities and arrhythmias, conventional surface 12 leads ECG findings were analyzed. The study group consisted of a total of 3,174 cases (1,778 men and 1,396 women, 17-87 years) without apparent organic heart diseases. The proportion of normal ECG progressively decreased with advancing age; it reached to the minimum of 20.0% in male and 22.7% in female after the age of 75. Frequency of supraventricular and ventricular premature complexes increased with advancing age as well as atrial fibrillation, left and right bundle branch block and left anterior hemiblock. Sinus bradycardia (less than 50/min) and the WPW syndrome did not follow this general trend but the former increased with advancing age after 55. Second and third-degree AV blocks were very rare in this study population. Right bundle branch block with left anterior hemiblock was not observed before age of 35, which may be regarded as a possible consequence of advanced age. Supraventricular and ventricular premature beats, and atrial fibrillation were more frequent in men than in women, but only in the older age stratum. Intraventricular conduction disorders were generally more common in men than in women. However, left bundle branch block was more frequently observed in female than in male in the older age stratum. The prolongation of QTc by oral IA antiarrhythmic drugs was observed after the age of 65. Thus, it was confirmed that aging might be important factor in abnormal findings and appearance of arrhythmias in conventional surface 12 lead ECGs.