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J Thorac Cardiovasc Surg 1995;110:1338-1343
© 1995 Mosby, Inc.

SURGERY FOR ACQUIRED HEART DISEASE

REVASCULARIZATION OF THE CIRCUMFLEX ARTERY WITH THE PEDICLED RIGHT INTERNAL THORACIC ARTERY: CLINICAL FUNCTIONAL AND ANGIOGRAPHIC MIDTERM RESULTS

Yvoir, Belgium

Sponsored by Albert Starr, MD

Portland, Ore.

Address for reprints: Michel Buche, MD, Cliniques Universitaires UCL de Mont-Godinne, Service de Chirurgie Cardiovasculaire et Thoracique, B-5530 Yvoir, Belgium.

Abstract

Retroaortic crossing of the pedicled right internal thoracic artery for revascularization of the circumflex artery used in combination with a pedicled left internal thoracic artery anastomosed to the left anterior descending artery and its branches is an attractive technique to achieve an extensive arterial revascularization of the left ventricle. However, there is a suspicion that pulling the right internal thoracic artery through the transverse sinus could compromise its blood flow capacity and patency. Between January 1990 and July 1994 this technique was applied in 256 patients (202 men, 54 women; average age 62 years, range 31 to 80 years). Sixty-one patients had two-vessel disease and 195 had three-vessel disease. Seventeen patients were undergoing a reoperation. Twenty-two had a left ventricular ejection fraction of 40% or less. Thirty had diabetes. Twenty-eight had morbid obesity. The right internal thoracic artery was directed to the circumflex artery (259 anastomoses) through the transverse sinus and the left internal thoracic artery was anastomosed to the left anterior descending artery and its branches (375 anastomoses) in all patients. The 195 patients with three-vessel disease received additional coronary artery bypass grafts to the right coronary artery (93 saphenous vein grafts, 89 free inferior epigastric artery grafts, 12 pedicled right gastroepiploic artery grafts). In total, the 256 patients received 833 distal anastomoses (average 3.2, maximum 5 per patient) and 634 distal anastomoses were internal thoracic artery anastomoses (average 2.4, maximum 4 per patient). Three patients died early and eight had a nonfatal myocardial infarction. Seven patients needed postoperative intraaortic balloon pump support. Six patients underwent early reoperation because of excessive bleeding. Sternal dehiscence occurred in four patients. One of these four patients died of the complication 10 months after the operation. No patient was lost to follow-up (average 33 months). During follow-up, two sudden deaths and six noncardiac deaths occurred. Two patients had a nonfatal myocardial infarction and 12 had recurrence of angina. There were no late reoperations. One patient underwent a successful percutaneous balloon angioplasty of a native left anterior descending artery. Seventy-four patients, enrolled in prospective angiographic studies, underwent a postoperative recatheterization (average 13.2 months, range 6 to 58 months). Seventy-three of the 74 right internal thoracic artery grafts were patent. In comparison, 74 of 74 of the left internal thoracic artery grafts (106/107 anastomoses) were patent. Maximal stress thallium-201 scintigraphy results, obtained in 25 of those patients, did not reveal ischemia in the area of the circumflex artery. Extensive arterial revascularization of the left ventricle by means of both pedicled internal thoracic arteries can be done with acceptable mortality and morbidity. The midterm patency rate of the pedicled right internal thoracic artery when passed through the transverse sinus for bypassing the circumflex artery is excellent and does not differ from the patency rate of the left internal thoracic artery anastomosed to the left anterior descending artery. (J THORAC CARDIOVASC SURG 1995;110:1338-43)

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