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Published on: June 29, 2022
Unusual atrial pacing induced by type II far-field p-wave sensing in a patient with complete atrioventricular block
Yasunobu Yamagishi1, Yasushi Oginosawa1, Nozomu Ishii1
1The Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
Abstract:
An 88-year-old Japanese woman underwent DDD pacemaker (MicroPort KORA 250 DR, V lead: VEGA R52) implantation for complete atrioventricular block. A 12-lead electrocardiogram for a routine examination showed atrial pacing within the intrinsic P wave, followed by inhibition of ventricular pacing. Pacemaker interrogation revealed no abnormalities in the basic parameters; however, ventricular pacing was inhibited by far-field sensing of intrinsic atrial waves before atrial events; type II far-field P-wave sensing. As a result, unusual atrial pacing occurred due to the pause suppression algorithm, which is the one of the functions that prevent atrial fibrillation development.
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