PMID: 6981902Jan 1, 1982Paper

A study of the factors influencing the appearance of the Ashman phenomenon

Acta Cardiologica
E T HeimonasM Chaniotakis

Abstract

The electrocardiograms of 29 patients with atrial fibrillation and aberrancy (Ashman phenomenon) were studied. The length of the cycles manifesting aberrancy (R-RA) varied from 270 to 520 msec (mean 372 +/- 55). It correlated negatively with the heart rate (r-0.899, p less than 0.001) and for equal heart rates in separate persons it varied with the length of the preceding R-R cycle (p less than 0.01). Above a critical R-RA length of 520 msec and outside an R-R/R-RA ratio range of 1.5-3.6 aberrancy is never observed: this finding is important for the differentiation of aberrancy from ventricular ectopy.

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