Open AccessAutomatic switching between the AAI and the DDD algorithm can prevent repetitive non‐reentrant ventriculoatrial synchrony
Author(s) -
Kitamura Takeshi,
Fukamizu Seiji,
Nauchi Masahiro,
Nishimura Takuro,
Watanabe Tomohiko,
Iwasawa Jin,
Shimada Hiroshi,
Ishikawa Tae,
Matsushita Noriko,
Abe Tomomi,
Hojo Rintaro,
Hayashi Takekuni,
Komiyama Kota,
Tanabe Yasuhiro,
Tejima Tamotsu,
Nishizaki Mitsuhiro,
Sakurada Harumizu,
Hiraoka Masayasu
Publication year - 2014
Publication title -
journal of arrhythmia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.463
H-Index - 21
eISSN - 1883-2148
pISSN - 1880-4276
DOI - 10.1016/j.joa.2013.04.009
Subject(s) - medicine , intracardiac injection , cardiology , ventricular tachycardia , implantable cardioverter defibrillator , tachycardia , electrophysiology , anesthesia , electrophysiologic study
A 67‐year‐old man with non‐obstructive hypertrophic cardiomyopathy had received an implantable cardioverter‐defibrillator (ICD) for an unstable, sustained ventricular tachycardia (VT) induced by programmed stimulation during an electrophysiological study 5 years earlier. An intracardiac electrogram recorded by the ICD revealed repetitive, non‐reentrant ventriculoatrial synchrony (RNRVAS) associated with hypotension. Electrophysiologic and hemodynamic studies indicated that RNRVAS was induced and reproducibly termed by a single ventricular extrastimulus from the right ventricular apex. Following attainment of the elective replacement indicator, we replaced the ICD with another having managed ventricular pacing, which automatically switched AAI and DDD, thereby avoiding unnecessary ventricular pacing. Thus far, the patient has not experienced further RNRVAS. Thus, we believe that automatic switching between AAI and DDD can prevent RNRVAS.