Key result
Left heart AV intervals differed significantly from right heart AV intervals during right atrial pacing and right ventricular sensing or pacing (-130 to +300 msec; P<0.001).
Why the study?
Does conventional right heart AAI and DDD pacing cause nonphysiological left heart AV intervals in patients with pacemakers?
Population
16 patients with pacemakers (10 with DDD and 6 with AAI pacemakers)
Comparison
Conventional right heart AAI and DDD pacing vs Programmed right heart AV intervals (RAV)
Design
Cross-sectional
Authors
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May produce nonphysiological LAV intervals with standard pacing; hypothesis-generating for conduction-adjusted programming effects on LV function.
Observational (n=16)
Does conventional right heart AAI and DDD pacing cause nonphysiological left heart AV intervals in patients with pacemakers?
p-value: p=<0.001
Conventional right heart pacing in DDD and AAI modes can result in nonphysiological left heart AV intervals due to interatrial and interventricular conduction delays, suggesting these delays should be accounted for during pacemaker programming.
Chirife et al. (1991) conducted an observational in Patients with DDD and AAI pacemakers (n=16). Right heart AAI and DDD pacing vs. Programmed right heart AV intervals (RAV) was evaluated on Difference between left heart AV intervals (LAV) and right heart AV intervals (RAV) (p=<0.001). Left heart AV intervals differed significantly from right heart AV intervals during right atrial pacing and right ventricular sensing or pacing (-130 to +300 msec; P<0.001).
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