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Lack of Influence of Atrioventricular Delay on Stroke Volume at Rest in Patients with Complete Atrioventricular Block and Dual Chamber Pacing
Author(s) -
OCCHETTA ERALDO,
PICCININO CRISTINA,
FRANCALACCI GABRIELLA,
MAGNANI ANDREA,
BOLOGNESE LEONARDO,
DEVECCHI PAOLO,
ROGI GIORGIO,
ROSSI PAOLO
Publication year - 1990
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.1540-8159.1990.tb02129.x
Subject(s) - medicine , atrioventricular block , rest (music) , cardiology , cardiac pacing , dual (grammatical number) , stroke volume , stroke (engine) , heart failure , ejection fraction , art , mechanical engineering , literature , engineering
Dual chamber pacing (DDD) maintains atrioventricular (AV) sequence; AV delay program mobility modifies the relationship between atrial and ventricular contraction. To evaluate the hemodynamic effects of such a modification, ten patients with a DDD unit for complete AV block were studied by time‐motion (M‐mode) and Doppler echocardiography during inhibited ventricular pacing (VVI), atrial‐triggered ventricular pacing (VDDJ and atrioventricular sequential pacing (DVI) at different AV delay (90, 140, 390, 240 msec). A significant improvement in stroke volume (SV) (15%–20%, P < 0.05) was seen during DDD versus VVI pacing; no changes, however, were observed in the same patient with different AV delay or during DVI versus VDD pacing. These data suggest that programming of AV delay does not affect systolic performance at rest; longer diastolic filling times recorded during DDD pacing with “short” AV delay (90–340 msec) do not seem to be a hemodynamically relevant epiphenomenon of PM programming.