The distribution of R-R intervals in atrial fibrillation varies predictably with the mean ventricular rate.
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R-R patterns in AF vary with rate; supports mechanistic studies but leaves open any clinical application.
A study was made of the variation in R-R interval in 47 long electrocardiographic recordings from 17 patients with atrial fibrillation. The distribution curve of ventricular intervals was found to vary in configuration according to the mean ventricular rate. A single high peak was seen at fast rates, two peaks at intermediate rates, and a single low peak flattening to a long low curve at slow rates.
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Horan et al. (1961) studied this question.
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