ECG survival tips: how to record them & how to read them

Introduction Although cardiovascular causes of poor performance are fairly infrequent, many horses have cardiovascular dysfunction, including resting arrhythmias and cardiac murmurs and consequently the significance of these abnormalities can be difficult to determine. As a result cardiac disease can be blamed for loss of performance when it is completely innocent and conversely, on the rare occasion cardiac disease is performance limiting, it is not uncommon for it to be totally overlooked.