Chronic total occlusion is defined as thrombolysis in myocardial infarction (TIMI) flow grade 0 with an estimated duration of at least 3 months. The interest in chronic total occlusion (CTO) percutaneous coronary intervention (PCI) has increased, but with failure rate up to 20%, leading to important developments in dedicated equipment and techniques. In the 2014 European Guidelines on Myocardial Revascularization, intravascular ultrasound was recommended to guide stent implantation in selected patients, and this recommendation was a class IIa/level of evidence B. In CTO PCI, certain angiographic features such as blunt proximal CTO cap, tortuosity, heavy calcification, and lack of visibility of path in the distal vessel increase procedural difficulty
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
DEVICE_FEASIBILITY
Masking
NONE
Enrollment
80
intravascular ultrasonography will be used during the study for the resolving proximal cap ambiguity of chronic total occlusion, facilitating re-entry into the true lumen after subintimal crossing and confirming distal true lumen guidewire position
outcomes of intravascular ultrasound guided re-canalized CTO during the procedure and composite of cardiac death, myocardial infarction, or target vessel revascularization
the study will assess the composite of cardiac death, myocardial infarction, or target vessel revascularization, rehospitalization, coronary artery bypass surgery and stroke within both groups
Time frame: 6 months
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