Аннотация:Cardiac venous system (CVS) in chronic heart failure (CHF) undergoes whole row of morpho functional changes, but investigations of CVS are practically absent. We studied CVS of patients with Doppler echocardiography and magnetic computer tomography of the heart. The state of peripheral venous system was assessed by measurement of peripheral venous pressure (PVP) with Waldman apparatus. Morphological changes of VCS were studied with light microscopy. All patients were distributed in groups in dependence on CHF stage. We assessed coronary sinus (CS) and large cardiac veins. In CHF PVP was significantly elevated, dimensions of CS and lumen of large cardiac veins substantially increased, and significant morphohystological changes of cardiac veins were noted. Detected changes of VCS in these patients depended on the stage of CHF.