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    Incidence of cardiac arrhythmias and left ventricular hypertrophy in recreational scuba divers

    84192.pdf (812.9Kb)
    Access Status
    Open access
    Authors
    Buzzacott, Peter
    Anderson, George
    Tillmans, Frauke
    Grier, James
    Denoble, P.J.
    Date
    2021
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Buzzacott, P. and Anderson, G. and Tillmans, F. and Grier, J. and Denoble, P.J. 2021. Incidence of cardiac arrhythmias and left ventricular hypertrophy in recreational scuba divers. Diving and Hyperbaric Medicine. 51 (2): pp. 190-198.
    Source Title
    Diving and Hyperbaric Medicine
    DOI
    10.28920/dhm51.2.190-198
    ISSN
    1833-3516
    Faculty
    Faculty of Health Sciences
    School
    Curtin School of Nursing
    URI
    http://hdl.handle.net/20.500.11937/84269
    Collection
    • Curtin Research Publications
    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.

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