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Beat‐to‐Beat Variability in Stroke Volume During VVI Pacing as Predictor of Hemodynamic Benefit from DDD Pacing
Author(s) -
DRITSAS ATHANASE,
JOSHI JAYSHREE,
WEBB STUART C.,
ATHANASSOPOULOS GEORGE,
OAKLEY CELIA M.,
NIHOYANNOPOULOS PETROS
Publication year - 1993
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.1540-8159.1993.tb01042.x
Subject(s) - medicine , beat (acoustics) , hemodynamics , cardiology , stroke volume , diastole , anesthesia , heart rate , blood pressure , physics , acoustics
To determine whether the magnitude of Beat‐to‐Beat variability in stroke volume (SVJ during VVI pacing can predici hemodynamic benefit from DDD pacing, we undertook Doppier recordings of systolic and diastolic LV flow during VVI and DDD pacing in 20 patients (age 54 ± 9 years)with DDD pacemakers implanted due to AV block. SV increased by 19%± 10% from VVI to DDD (P < 0.01). This increase was greater (29%± 9%)in patients with a ratio of early (E)/late (A) filling < 1 compared to those with E/A > 1 (10%± 9%) (P < 0.001). Beat‐to‐Beat variability in SV was greater in VVI (13%± 8%)compared to DDD (4%± 1%) (P < 0.001). Patients with E/A < 1 showed greater Beat‐to‐Beat variability in SV during VVI pacing (19 ± 6%)compared to those with E/A > 1 (8%± 4%) (P < 0.001). Beat‐to‐Beat variability in SV during VVI pacing correlated with both percent change in SV from VVI to DDD (r = 0.89, P < 0.001)and E/A (r = ‐0.71, P < 0.001). In conclusion, patients with E/A < 1 derive greater hemodynamic benefit at rest from DDD pacing compared with E/A > 1. In addition, patients with complete AV block who show large variations in SV during VVI pacing may obtain greater hemodynamic benefit at rest from DDD pacing than patients with small variations.