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- Title
Incidence of cardiac arrhythmias and left ventricular hypertrophy in recreational scuba divers.
- Authors
Buzzacott, Peter; Anderson, George; Tillmans, Frauke; Grier, James W.; Denoble, Petar J.
- Abstract
Introduction: The aims of this study were to investigate the potential impact of age, sex and body mass index (BMI) upon the incidence of arrhythmias pre- and post-diving, and to identify the prevalence of left ventricular hypertrophy (LVH) in older recreational divers. Methods: Divers aged = 40 years participating in group dive trips had ECG rhythm and echocardiograph recordings before and after diving. Arrhythmias were confirmed by an experienced human reader. LVH was identified by two-dimensional echocardiography. Weighted (0.5 fractional) values were used to account for participation by seven divers in 14 trips. Results: Seventy-seven divers undertook 84 dive trips and recorded 677 dives. Among divers with no pre-trip arrhythmias (n = 55), we observed that 6.5 (12%) recorded post-trip arrhythmias and the median increase was 1.0 arrhythmia. In divers with pre-trip arrhythmias, 14.5 had a median of 1.0 fewer post-trip arrhythmias, 2.0 had no change and 5.5 had a median of 16.0 greater. Age, but neither sex nor BMI, was associated with change in the number of arrhythmias before and after dive trips (P = 0.02). The relative risk for experiencing a change in the frequency of arrhythmias after a diver trip, was 2.1 for each additional 10 years of age (95% CI 1.1, 4.0). Of the 60 divers with imaging of their heart, five had left ventricular hypertrophy. Conclusions: We observed a higher than expected prevalence of arrhythmias. Divers with pre-trip arrhythmias tended to be older than divers without pre-trip arrhythmias (P = 0.02). The prevalence of LVH in our cohort was one quarter of that found post-mortem in scuba fatalities.
- Subjects
LEFT ventricular hypertrophy; SCUBA divers; ARRHYTHMIA; DISEASE incidence; BODY mass index; ECHOCARDIOGRAPHY
- Publication
Diving & Hyperbaric Medicine: Journal of the South Pacific Underwater Medicine Society, 2021, Vol 51, Issue 2, p190
- ISSN
1833-3516
- Publication type
Article
- DOI
10.28920/dhm51.2.190-198