Studies were performed on 130 hearts removed from cadavers of adults of both sexes. The atrioventricular (A-V) and ventriculoatrial (V-A) branches are vessels which supply both the atrial and ventricular walls through the recurrent rami. A-V and A-V branches often form the superficial and deep networks in relation to the right coronary artery and cirumflex branch of the left coronary artery. The described vessels were observed in 7,5% of cases in the right type, in 53,4% of cases in the symmetrical type of arterial vascularization, and in 23% of instances in the left type of arterial supply.