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Radionuclide Evaluation of Dual Chamber Pacing: Comparison Between Variable AV Intervals and Ventricular Pacing
Author(s) -
LEMAN ROBERT B.,
KRATZ JOHN M.
Publication year - 1985
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.1540-8159.1985.tb05780.x
Subject(s) - medicine , ejection fraction , cardiology , ventricular pacing , stroke volume , ventricular function , radionuclide ventriculography , anesthesia , heart failure
We prospectively evaluated changes in left ventricular ejection fraction, end diastolic volume, and stroke volume via radionuclide multigated acquisition study, Comparison was made between ventricular pacing and dual chamber pacing with varying AV intervals. The volumes and changes in ejection fraction were determined at rest, at set increased pacing rates, and during physiological stress. AV sequential pacing shows overall improvement in cardiac function in the majority of patients regardless of left ventricular function. The shorter AV interval would be appropriate for the majority of patients who have an atrial tracking mechanism (adequate intrinsic sensed atrial activity followed by ventricular pacing) and who undergo significant physiological stress.