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[Functional reserves of myocardial perfusion in patients with chronic ischemic heart disease with varying degrees of damage of the coronary arteries].

A comparative study of data provided by coronaro-angiography and myocardial perfusion scintigraphy (resting and exercise tests), and clinical/electrocardiographic results of the exercise test in 102 chronic coronary patients demonstrated that non-invasive myocardial perfusion 201Tl scintigraphy combined with threshold bicycle-ergometric exercise adds considerably to the clinico-electrocardiographic assessment of the exercise test and thus helps to detect myocardial blood supply (perfusion) disorders in some of coronary patients with doubtful or negative test results. Reduced functional reserves of myocardial blood supply, as reflected in deficient perfusion at the peak of threshold exercise, are seen in all coronary patients with angiographically intact coronary arteries and in most patients with both the so-called "functionally-insignificant" and marked coronary arterial stenosis (94.7 and 88.3%, respectively).