[Specific features of the clinical course and angiographic pattern in chronic coronary artery occlusion].

Particular features of coronary angiography and clinical presentation of coronary artery disease have been studied in patients with chronic total coronary occlusion. Chronic total coronary occlusion is defined as TIMI 0 or TIMI I type flow in the artery for more than three days. Patients with coronary occlusion have more severe course of coronary artery disease: they more often suffer myocardial infarction and high gradations of angina. Myocardial function is much more affected if there is occlusion of left descending artery, or there are no signs of intercoronary collaterals.