Heart disease
Although the presence of heart murmurs and arrhythmias (irregular heart rhythm) are not uncommon in horses, they rarely cause any signs of actual heart disease in most horses. The most common type of abnormalities detected are abnormalities of the valves between the heart chambers or between the heart and the arteries, and some arrhythmias.
Listening to the heart using a stethoscope
©Dr Lesley Young