Myocardial refers to the heart muscle.
Perfusion is the passage of blood through the circulatory system.
And imaging refers to computer-generated pictures. Therefore, myocardial perfusion imaging is a procedure that lets your doctor look at the flow of blood to the heart muscle. If more tests are necessary. Myocardial perfusion imaging may be done before or after treatment for heart ailments. Stenosed arteries reduce blood flow, which reduces the amount of oxygen and other nutrients the heart receives.