Abrupt Heart Rate Fallings in a Patient with Biventricular Pacing: Latent Risk for Exacerbation of Heart Failure |
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| Authors: | HIRO KAWATA MD TAKASHI NODA MD YUKO YAMADA MD HIDEO OKAMURA MD HIROYUKI NAKAJIMA MD JUNJIRO KOBAYASHI MD SHIRO KAMAKURA MD |
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| Institution: | 1. Division of Cardiology, Department of Internal Medicine, National Cardiovascular Center, Suita, Japan;2. Department of Cardiovascular Surgery, National Cardiovascular Center, Suita, Japan |
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| Abstract: | This case report describes abrupt heart rate fallings below the lower pacing rate limit in a patient with cardiac resynchronization therapy (CRT). Interrogated information including stored episodes or data regarding the lead did not show any device problems and only simultaneous intracardiac electrogram revealed the cause, T‐wave oversensing during biventricular pacing. At this moment, CRT has become an established modality for patients with severe heart failure. However, bradycardia below the lower rate limit during biventricular pacing due to T‐wave oversensing would exacerbate heart failure in patients with CRT. We should notice this latent risk and correct the malfunction immediately. (PACE 2010; 1–4) |
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| Keywords: | T‐wave oversensing CRT device malfunction |
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