title: Ask the doctors.  A friend with heart disease was doing fine until he underwent an operation for colon cancer.  He got through the first few days without any problems, but then had a heart attack on the fourth day and nearly died.  Why would he have had a heart attack after an operation?  I need to have surgery and am wondering how dangerous it will be.
authors.forename: Thomas H
authors.initials: TH
authors.lastname: Lee
authors.forename: Richard T
authors.initials: RT
authors.lastname: Lee
mesh_terms: D003110:Colonic Neoplasms; D033062:Friends; D006331:Heart Diseases; D006801:Humans; D008297:Male; D009203:Myocardial Infarction; D010820:Physicians; D012307:Risk Factors