The paper reports the animal experiment that local myocardial blood flow is measured with the help of radioactive biomicrosphere. The result of research demonstrates that CO 2 laser myocardial revascularization with the help of the tailor made filter is effectual for improvement of myocardial blood microcirculation and myocardial ischemia. The paper analyses and explains some inconsistent phenomena in the research of laser myocardial revascularization according to the principle of laser myocardium interactions.