ULTRASOUND CONTRAST STUDY OF THE MYOCARDI UM IN THE EXPERIMENT

The ultrasound contrast medium obtained by the original methods was ad ministered into the left ventricular cavity and myocardium of 12 open- chest dogs by using a catheter. After its administration into the cavi ty there was its intensive contrast. When the ultrasound contrast was administered into the aortic root, the entire myocardium contrasted, o n selective administrations of the contrast into the coronary arteries , the beds supplied by appropriate arteries contrasted. The ultrasound contrast study enabled the areas with impaired perfusion as echo-nega tive ''filling defects'' to be detected and mapped. The imaging of myo cardial blood flow in tomographic sections and real time allows one to regard it promising for clinical use.