Previous studies have indicated that ventricular asynchrony may signif
icantly affect resting coronary blood flow velocity. Our study argues
against this hypothesis, as comparable left anterior descending blood
flow velocities were found during three pacing modalities, associated
with varying degrees of asyncbrony: (a) atrial pacing, (b) atrioventri
cular (AV) sequential pacing from the right ventricular apex and (c) A
V sequential pacing from the proximal right ventricular septum. (C) 19
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