Pragmatic Trial Comparing Symptom-Oriented Versus Routine Stress Testing in High-Risk Patients Undergoing Percutaneous Coronary Intervention

In the group of routine stress testing group, the preselected functional test (exercise ECG, nuclear stress testing, or stress echocardiography) will be performed at 9\~15 months after the procedure according to the practice pattern of each participating center.

In the group of symptom oriented stress testing group, the preselected functional test (exercise ECG, nuclear stress testing, or stress echocardiography) will be performed when chest pain or angina symptom is occured after the procedure according to the practice pattern of each participating center.