In 100 consecutive patients where planned coronary arteriography was performed, in the majority on account of IHD, the authors analyzed retrospectively information on risk factors of IHD, medicamentous treatment and the reasons for coronarography, findings on the coronary arteries, the size and function of the left ventricle and the final choice of subsequent treatment. A significant finding on the coronary arteries (stenosis of more than 50%) was recorded in 65% of the patients, in 22% of the patients the coronarographic finding was normal, in another 7% only insignificant changes were found (stenosis of less than 50%) and in 6% of the patients on coronarography a spasm of the coronary artery was recorded. A bypass operation was performed in 15% of the patients subjected to coronarography, in another 6% successful PTCA was performed, i.e. a total of 21% patients were revascularized. These results are compared with those of other departments in Czechoslovakia and abroad and the causes of revealed differences are discussed. Finally the authors emphasize the necessity of stratification of IHD patients according to risk and the selection of suitable candidates of coronarography and subsequent possible revascularization of the heart muscle according to accepted criteria for indication.