Resting and exercise 99mTc-technetryl myocardial scintigraphies were performed in 145 patients with various cardiovascular diseases. Normal lowered and elevated radioopaque accumulations were found to be present in both coronarogenic and noncoronarogenic diseases. Four degrees of agent hypofixation and four types of stress myocardial scintigraphies were interpreted from clinical points of view. Coronary failure is characterized by more severe hemoperfusion disorders (degrees 3-4) and the 3rd-4th variant of stress myocardial scintigraphy.