Premium
Exercise Induced Sympathetic Influences Do Not Change Interatrial Conduction Times in VDD and DDD Pacing
Author(s) -
ISMER BRUNO,
KNORRE GEORG H.,
VOSS WOLFGANG,
GRILLE WERNER,
KLENKE GEORG,
PULYA KAMESH,
KOGLEK WALTER,
SUNTINGER ANTON,
LUESSOW HEIDRON
Publication year - 1996
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.1540-8159.1996.tb03225.x
Subject(s) - medicine , cardiology , ventricle , atrium (architecture) , atrial fibrillation
Using telemetry, right atrial electrogram (RA), and marker channel of atrial sense events (M A ) in combination with the left atrial electrogram (LA), recorded by a filtered bipolar esophageal lead, interatrial conduction during submaximal exercise and at rest was examined in 46 DDD pacemaker patients. The RA‐LA and M A ‐LA conduction times measured in the presence of atrial sensing (VDD) as well as the conduction time S A ‐LA from atrial stimulus (S A ) to LA, determined during atrial pacing (DDD) were found to be individual constants independent of exercise induced sympathetic influences. Thus, having determined an optima! mechanical interval (LA‐LV) mech/opt from left atrium to ventricle by other methods, the optimal AV delay for DDD as well as for VDD operation can be calculated by the sum of the appropriate interatrial conduction time (S A ‐LA, respectively M A ‐LA) and the (LA‐LV) mech/opt interval. Due to the constant S A ‐LA and M A ‐LA, the difference between these two values (AV delay correction interval) is a constant as well, which remains unchanged during exercise. Therefore, in selecting the rate responsive AV delay, only hemodynamic and not electrophysiologica] measurements need to be considered.