Hi Doctor, My husband went for a regular health check and found that he had some difficulty in doing stage 3 of stress treadmill. So, he was asked to go for angiogram. The angiogram found a 70% block way above in the left coronary artery. Apparently, the location of the narrowing makes it unsuitable for angioplasty. So he is asked to go for bypass surgery. He has a strong family history of IHD. However, currently, he is not feeling any pain or uneasyness and he is able to do brishk walking for upto 40 minutes every day. Would you suggest we should go for bypass surgery