Eminent cardiac surgeon Dr K M Cherian, who performed the country's first coronary artery bypass surgery about 50 years ago, has passed away. The veteran surgeon, in his 80s, died in Bengaluru on Saturday after reportedly collapsing during a function. Prime Minister Narendra Modi and Tamil Nadu Chief Minister M K Stalin have expressed their condolences, recognizing Dr Cherian's contributions to cardiology. Dr Cherian, who founded the Frontier Lifeline hospital in Chennai, was a recipient of the Padma Shri award.