The Chief Minister would require two surgeries - a bypass surgery and another surgery to replace an aortic valve with 70 to 80 percent blocks in two blood vessels.
"The surgeries are complex, but not complicated and we expect the CM to be fully fit and back to normal work in about four weeks," Dr Ramakant Panda, cardiac surgeon and managing director of the Asian Heart Institute, said.
"We would be taking about six to eight hours for the surgeries and then he would be in the hospital for about three weeks before we allow him to go back to Guwahati and resume his normal work," Dr Panda said.
"All his health parameters are absolutely fine and, more than that, his self confidence is pretty high and hence we are happy about it," said Panda.
The CM complained of breathing problems and a rise in blood pressure on Jul 24 while attending the meeting of the National Development Council in New Delhi chaired by Manmohan Singh.
He was then admitted to the Max Hospital in New Delhi and later shifted to the Asian Heart Institute.