Key result
Bipolar atrial sensing thresholds during induced atrial tachyarrhythmias were significantly lower than during sinus rhythm (1.52 vs 3.35 mV, P<0.001), with a 63% reduction during atrial fibrillation.
Why the study?
How do bipolar atrial sensing thresholds during induced atrial tachyarrhythmias compare to those during sinus rhythm in patients with DDDR pacemakers?
Population
43 patients undergoing DDDR pacemaker implantation and atrioventricular nodal ablation for the treatment of…
Comparison
Measurement of bipolar atrial sensing thresholds… vs Bipolar atrial sensing thresholds during sinus…
Design
Cohort
Follow-up
24-48 hours
Authors
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May support larger sinus-rhythm sensing margins for reliable AMS; leaves open prospective validation in spontaneous arrhythmias.
Observational (n=43)
How do bipolar atrial sensing thresholds during induced atrial tachyarrhythmias compare to those during sinus rhythm in patients with DDDR pacemakers?
Absolute Event Rate: 1.52% vs 3.35%
p-value: p=<0.001
Atrial sensing thresholds are significantly reduced during atrial fibrillation compared to sinus rhythm, suggesting a 4:1 to 5:1 safety margin based on sinus rhythm is needed for adequate automatic mode switching.
Jörg Neuzner (1999) conducted an observational in drug-refractory paroxysmal atrial fibrillation (n=43). Bipolar atrial sensing thresholds during induced atrial tachyarrhythmias vs. Bipolar atrial sensing thresholds during sinus rhythm was evaluated on Atrial sensing threshold (mV) (p=<0.001). Bipolar atrial sensing thresholds during induced atrial tachyarrhythmias were significantly lower than during sinus rhythm (1.52 vs 3.35 mV, P<0.001), with a 63% reduction during atrial fibrillation.
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