,INDICATIONS: , Persistent chest pain on maximum medical therapy with known history of coronary artery disease, status post coronary artery bypass grafting in year 2000.,PROCEDURE: , After the risks, benefits, and alternatives of the above-mentioned procedure were explained to the patient in detail, an informed consent was obtained both verbally and in writing. 
,INDICATIONS : , Persistent chest pain on maximum medical therapy with known history of coronary artery disease , status post coronary artery bypass grafting in year 2000.,PROCEDURE : , After the risks , benefits , and alternatives of the above - mentioned procedure were explained to the patient in detail , an informed consent was obtained both verbally and in writing .