Abstract
Studies of the effects of therapeutic ultrasound on blood flow in skeletal muscle have indicated that an increase in flow results from the hyperthermia associated with tissue absorption of the acoustical energy. Some preliminary studies in our laboratories have suggested that coronary blood flow distribution in normal myocardium may be altered by low levels of therapeutic ultrasound. A study is in progress to evaluate the effect of a therapeutic level of ultrasound on regional coronary blood flow in normal and acutely ischemic areas of the canine myocardium. A mechanical effect associated with microacoustical streaming would be an attractive mechanism to provide potential benefit.
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