Sir. I underwent open heart surgery at my 62 years of age i. E. In the year 2000. I was alright and take ecosprin 150 every day. Recently I observed that when I take my food or tiffen, I feel some pain while walking even a bit distance. This remains for half an hour so then I will be alright. Please. Advise me the reason for this and any suggession by way of medicine etc. Thanking you sir.