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Stenting in left main trunk had become a routine procedure in interventional cardiology nowadays.It remained challenging when the treated patient was old and the coronary anatomy was not favorable.In this case, who was an 87 year old lady, presented as non-ST elevation myocardial infarction and pulmonary edema, we faced the problems of unfavorable coronary anatomy, and economic concerns.The patient had old anterior wall myocardial infarction.The decision making about where to stent and how to do it quickly and efficiently,without affecting non-diseased artery was crucial.We treated the patient by stenting in left main-left anterior descending artery (LM-LAD) by bare-metal stent, followed by kissing balloon at LM-LAD, LM-Left circumflex artery.The patient had contrast induced nephropathy, even the pre-procedure creatinine level was 1 mg/dl.She recovered several days later.