Echocardiography has become routinely procedure used in the diagnosis, management, and follow-up of patients with any suspected or known heart diseases. It is one of the most widely used diagnostic modality in cardiology. It can provide a wealth of helpful information, including the size and shape of the heart, pumping capacity, and the location and extent of any tissue damage of heart. An Echocardiogram on other hand gives physician’s estimates of heart function such as a calculation of the cardiac output, ejection fraction, and diastolic function. It also helps to evaluate cardiac defects such as, atrial septal defects, AV valve stenoses, coronary artery defects, occult DCM, coronary artery disease, feline heartworm disease, persistent left cranial vena cava, canine hypertrophic cardiomyopathy and feline diastolic dysfunction may be identified. This Review details principle, uses, technique, types and limitations of Echocardiography in equines.