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Inconsistent Response to Rapid Atrial Rhythms in a DDD Pacemaker with the Fallback Feature
Author(s) -
JOHNSON NANCY J.
Publication year - 1995
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1995.tb02611.x
Subject(s) - medicine , rhythm , feature (linguistics) , atrial fibrillation , cardiology , heart rhythm , philosophy , linguistics
Dual chamber pacing may be problematic in patients with paroxysmal atrial arrhrfhmias. The fallback feature has been incorporated into some devices to avoid tracking of rapid atrial rhythms. A case is reported in which the initiation of fallback was inconsistent during paroxysms of atrial flutter. Evaluation of the ventricular output of an isolated device in response to various applied atrial rates revealed that fallback occurred consistently only when 2×TARP (ms) ≤ URL (ms).