Аннотация
Chronic total occlusion (CTO) disease refers to obstructive coronary artery disease, which is the degree of direct blood flow of the blood flow TIMI 0 degree of occlusion time 3 months, if there are already well-developed collaterals or bridge collaterals, the distance from the occlusion of the blood vessel TIMI blood flow > 0 degree is still considered a total occlusion disease. Previous studies have shown that 20% of patients with coronary heart disease have experienced CTO lesion from at least one vessel, Percutaneous Coronary Intervention (PCI) surgery is called the