A Portable Electrocardiograph with a Magnetic Tape Recording System for the Horse during Exercise

Abstract

In order to obtain electrocardiograms of the horse during exercise, regardless of the location of the horse, a portable electrocardiograph was tentatively manufactured. It was small in size and equipped with a magnetic tape recording system.
In the application of this system to electrocardiographic examination of the horse during exercise, it was found that the apparatus was useful for observation of the heart rate during exercise and of ventricular arrhythmia, although there were a slight distortion of electrocardiogram and unfavourable noises interfering with tracing. Causes of these distortion and noises were discussed. Furthermore, in the application of this apparatus to clinical examination, a case was encountered which revealed the paroxism of a short run of venticular flutter in its electrocardiograms during exercise, although there were no abnormalities in the electrocardiograms at rest.