Radiographic and echocardiographic examination are a part of heart disease diagnostics which can occur as congenital or aquired. Congenital heart defects can occur in endocradium, major blood vessels and valves, or they can cause abnormal mixing of arterial and venous blood flow. Congenital heart defects are subaortic stenosis, pulmonary stenosis, patent ductus arteriosus, atrioventricular valve dysplasia, ventricular and atrial septal defect, tetralogy of Fallot, persistent right aortic arch and endocardial fibroelastosis. Cardiomyopaties can manifest as idiopathic hypertrofic, dilated and restrictive cardiomyopathy, as well as arythmogenic right ventricular cardiomyopathy and myocarditis. Corticosteroids can also cause myocardial disease. Pericardial defects occur as peritoneopericardial hernia and pericardial effusion. Heart tumors occur rarely, mostly as lymphoma. Thoracic radiographs should always be made in two views – lateral and dorsoventral/ventrodorsal. The cardiac silhouette includes the heart, pericardium with its content, origin of the aorta and the pulmonary trunk. The outline of the cardiac silhouette in healthy animals is smooth. The size and shape of the heart, changes in the lungs (effusion, oedema) and chamber position can all be evaluated on radiograph. Estimation of the surrounding structures is also possible, such as of trachea, considering specific heart diseases can cause dyslocation of those structures or some other changes. Echocardiography is used for evaluating chamber size and wall thickness, as well as for identification of abnormal shunts and valve dysplasia. M-mode is used for evaluation of myocard contractility, also known as „left ventricular fractional shortening“. The 2-D imaging mode should guide accurate placement of the M-mode cursor. Color-Doppler is a type of ultrasonographic exam which allows blood velocity measurement and the identification of defects that cause abnormal blood flow. Veterinarian's knowledge and skill as well as the corelation of the results with patient history, clinical findings, ECG and laboratory results are needed for understanding radiographic and echocardiographic features.