CTO approach

Percutaneous coronary intervention for the treatment of chronic total occlusions (CTO) has made remarkable progress in recent years. First of all, appropriate angiographic evaluation is essential to provide clear imaging of the coronary arteries and their branches. Observe in detail the pattern, the length and the direction of the CTO, the condition of the side branches, the pattern of vessels distal to the occluded segment, and the extent of calcification. 
The antegrade approach, using conventional guidewire and microcatheters is always the first choice...