ISSN: 2223-2133 (Online), 1815-8986 (Print)
Vol. 9, Number 1, July 2009
Reference values of Holter electrocardiography in normal horses
Zoltan Bakos, Louise Lohne
The aim of the study was to obtain a set of relevant measurements from healthy, resting horses that can be used as reference values for Holter electrocardiography. Twenty healthy horses (eight mares, two geldings and ten stallions) were selected randomly. The animals varied in age from three to nine years. Electrocardiography was performed at rest in the stable without the presence of the examiner causing additional stress. Each horse was monitored for one hour. P-wave duration, P-wave peak interval, P-R segment, P-R interval, QRS interval, S-T segment, Q-T interval and S-T interval were determined. Median values of the above-mentioned parameters in milliseconds were as follows: 110, 65, 153, 273, 131, 218, 557 and 426, respectively. These values differ significantly from previously published results based on standard electrocardiography.