Key result
Exercise fails to alter interatrial conduction times in VDD and DDD pacing versus rest.
Why the study?
The influence of exercise-induced sympathetic activity on interatrial conduction times in patients with VDD and DDD pacing was unclear.
Does submaximal exercise change interatrial conduction times in DDD pacemaker patients?
Population
46 DDD pacemaker patients
Comparison
Submaximal exercise vs rest
Design
Observational study using telemetry and electrograms
Authors
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Constant interatrial conduction times support fixed AV corrections in DDD/VDD; leaves open rate-adaptive programming relying only on hemodynamics.
Observational (n=46)
Does submaximal exercise change interatrial conduction times in DDD pacemaker patients?
Interatrial conduction times remain constant during exercise, suggesting that rate-responsive AV delay programming should be based solely on hemodynamic rather than electrophysiological changes.
ISMER et al. (1996) conducted an observational in DDD pacemaker patients (n=46). Submaximal exercise vs. Rest was evaluated on Interatrial conduction times (RA-LA, MA-LA, SA-LA). Exercise-induced sympathetic influences did not change interatrial conduction times in VDD and DDD pacing compared to rest.