Key result
In dogs with experimental AV block, corrected sinus node recovery time lengthened as spontaneous atrial cycle length increased due to changes in ventricular pacing rate.
Why the study?
Does spontaneous atrial cycle length affect corrected sinus node recovery time in unanesthetized dogs with AV block?
Does spontaneous atrial cycle length affect corrected sinus node recovery time in unanesthetized dogs with AV block?
Corrected sinus node recovery time is strongly dependent on spontaneous atrial cycle length, suggesting that SCL must be considered when determining normal ranges for CSNRT in clinical settings.
Answers are grounded in this paper and cite their sources.
CSNRT lengthens with spontaneous atrial cycle length in canine AV block; leaves open adjustment of human normal ranges.
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Aizawa et al. (1985) studied Atrioventricular block (experimental) (n=5). Alteration of spontaneous atrial cycle length via ventricular pacing vs. Baseline ventricular pacing at 90 bpm was evaluated on Corrected sinus node recovery time (CSNRT). In dogs with experimental AV block, corrected sinus node recovery time lengthened as spontaneous atrial cycle length increased due to changes in ventricular pacing rate.
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