BVS Implantation in Patients With Variant Angina and MODerate Coronary Artery Disease

Inclusion Criteria: * Age 19 and more * Vasospastic angina diagnosed by provocation test including ergonovine provocation coronary angiography or ergonovine echocardiogram * No-ischemia producing moderate coronary artery disease(stenosis\>50%, FFR\>0.8) Exclusion Criteria: * Ischemic coronary lesion * Organic heart disease associated with myocardial ischemia or sudden cardiac death * History of percutaneous coronary intervention * Cerebrovascular diseases or peripheral disease * NYHA III and IV * Cardiac pacemaker or implantable defibrillator * Pregnancy or breast feeding * Life expectancy less than 2 years