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A Case of Ventricular Undersensing in the DDI Mode: Cause and Correction
Author(s) -
BERTUSO JOHN,
KAPOOR AMAR S.,
SCHAFER JOHN
Publication year - 1986
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.1540-8159.1986.tb05416.x
Subject(s) - medicine , cardiology
A case is presented that demonstrates a confusing problem of ventricular undersensing in the DDI pacing mode, Electrocardiographic monitoring of the patient after pacemaker implantation revealed intermittent ventricular channel outputs which appeared to be inappropriate. These occurred a period of time after the intrinsic R wave, equal to the programmed AV interval. This problem was caused by ventricular lead undersensing, which resulted when the patient's intrinsic rate was such that the intrinsic ventricular complex occurred during the ventricular blanking period. The problem was corrected by reprogramming the blanking period.