title: Abrupt heart rate fallings in a patient with biventricular pacing: latent risk for exacerbation of heart failure.
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.
authors: Department of Internal Medicine, National Cardiovascular Center, Suita, Japan.
authors: Hiro
authors: H
authors: Kawata
authors: Takashi
authors: T
authors: Noda
authors: Yuko
authors: Y
authors: Yamada
authors: Hideo
authors: H
authors: Okamura
authors: Hiroyuki
authors: H
authors: Nakajima
authors: Junjiro
authors: J
authors: Kobayashi
authors: Shiro
authors: S
authors: Kamakura
mesh_terms: D000368:Aged; D058406:Cardiac Resynchronization Therapy / Q000009:adverse effects*; D022062:Electrophysiologic Techniques, Cardiac; D006333:Heart Failure / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D012306:Risk; D016896:Treatment Outcome