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Atrial Latency in a Dual Chambered Pacing System Causing Inappropriate Sequence of Cardiac Chamber Activation
Author(s) -
GRANT S.C.D.,
BENNETT D.H.
Publication year - 1992
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.1540-8159.1992.tb02907.x
Subject(s) - medicine , cardiology , bradycardia , atrial flutter , stimulation , tachycardia , anesthesia , atrial fibrillation , heart rate , blood pressure
A transvenous atrioventricular pacemaker was implanted in a patient in whom functional bradycardia and recurrent ventricular tachycardia had occurred after coronary artery bypass surgery. The period between delivery of the atrial stimulus and resultant atrial excitation was prolonged by up to 0.22 seconds and exceeded the programmed delay between atrial and ventricular stimulation. Consequently, ventricular stimulation preceded atrial excitation. Cardiac failure resulted: it was resolved by reprogramming the pacemaker to the atrial inhibited mode.