[Direct myocardial revascularization in which the internal mammary artery is anastomosed to the right coronary artery, circumflex artery, or anterior descending coronary artery. The internal mammary artery is the most frequent choice, especially for a single graft, for coronary artery bypass surgery. ( MSH )]
UMLS (ICD9CM) C0021781 - Therapeutic or Preventive Procedure