Premium
Noninvasive Measurement of Retrograde Conduction Times in Pacemaker Patients
Author(s) -
MARCO DAVID D.,
GALLAGHER DIANE
Publication year - 1988
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.1540-8159.1988.tb06293.x
Subject(s) - medicine , cardiology , intracardiac injection , refractory period , atrial fibrillation , anesthesia
Retrograde, or ventriculoatrial conduction (VAC) has been measured in 67% of pacemaker patients with SSS and 25% of patients with 3° block. 1 DDD pacers use the postventricular atrial refractory period [PVAHP] to prevent sensing VAC. If the PVARP is too short, a pacer‐mediated tachycardia (PMT) could occur. If too long, rapid atrial rates may not be sensed. To accurately set the PVARP, VAC must be measured. Five noninvasive methods are described: (1) Surface ECG during WI pacing; (2) Atrial intracardiac electrograms during WI pacing; (3) Initiating a PMT with long pacemaker AV interval; (4) Initiating a PMT at the maximum tracking rate; (5) DDI mode with electronic calipers. The description of these methods is intended to enable a physician to detect and measure VAC in patients with any manufacturer's DDD or VDD pacemaker.