A male aged 70 yrs who underwent Laproscopic cholecystectomy  was discharged and was doing well and all of a sudden on 10th Postoperative day at home complained pain retroxhiphisternal region. Cardiac evaluation was done preoperatively and at every step postoperatively. Physician who hapenned to be the son of the patient attended him ----- because of previous thorough check up and cardiac  evaluation did not think it seriously and just gave him a tablet of Digene  and went for jogging.

Immediately the Physician got the call that his father is not well and by the time  physician - son came only to see that his father is no more. What are the  possibilities for the cause of death.