Is there a limit to the number of cardiac surgeries a person can have?  I had coronary artery bypass surgery many years ago and now my cardiologist tells me that I need another surgery for a bad valve.
D001026:Coronary Artery Bypass; D006349:Heart Valve Diseases / Q000601:surgery*; D019918:Heart Valve Prosthesis Implantation; D006801:Humans