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It can also contribute to cardiac
arrest, which is fatal without (and
often even with) prompt intervention.
The prevalence of LVH in divers is
probably similar to that in the general
population, but this isn’t known for sure,
nor is it known whether diving could
increase the likelihood of arrhythmias or
SCD in divers with LVH.
In the next two years DAN Research,
in cooperation with Dr. Douglas G.
Ebersole of Watson Clinic in Lakeland,
Fla., will conduct echocardiographic
screening of divers for LVH and
monitor the rate and electrical activity
of their hearts during diving.
We will conduct the study
during weeklong dive trips, both on
liveaboards and shore-based. We
will choose participants from among
already-planned trips in which
conditions are suitable for research
and in which most group members
agree to volunteer as study subjects.
Subjects should be willing to undergo
health-history interviews, noninvasive
echocardiography tests and electrical
monitoring of the heart before, during
and after some dives. Once the data are
analyzed, each participant will receive a
summary of findings.
The main purpose of the study is
to establish the prevalence of LVH in
recreational scuba divers and its effects
on the prevalence of arrhythmias
during diving. If the study provides
evidence that LVH is associated with
increased frequency of arrhythmias
in scuba diving, LVH may become
a target of preventive interventions
aimed to reduce fatalities in diving.
— Petar Denoble, M.D., D.Sc.
Senior director, DAN Research
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