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J Thorac Cardiovasc Surg 1999;117:873-880
© 1999 Mosby, Inc.

SURGERY FOR ADULT CARDIOVASCULAR DISEASE

EARLY EXPERIENCE WITH MINIMALLY INVASIVE DIRECT CORONARY ARTERY BYPASS GRAFTING WITH THE INTERNAL THORACIC ARTERY

From the Divisions of Cardiac Surgery, Sinai Hospital at Baltimore and Washington Adventist Hospital, Takoma Park, Md.

Received for publication May 14, 1998. Revisions requested July 13, 1998. Revisions received Dec 23, 1998. Accepted for publication Dec 30, 1998. Address for reprints: James D. Fonger, MD, Adventist Heart, 7610 Carroll Ave, Suite 440, Washington Adventist Hospital, Takoma Park, MD 20912.

Objective: Minimally invasive direct coronary artery bypass is performed under direct vision without sternotomy or cardiopulmonary bypass. The technique can be used in both primary and reoperative cases by employing the internal thoracic artery to perform arterial revascularization of the anterior surface of the heart.
Methods: Patients were selected who had significant coronary artery disease limited to 1 or 2 coronary distributions on the anterior surface of the heart. Coronary target vessels were grafted with the internal thoracic artery through a small anterior thoracotomy. After partial heparinization the anastomosis was facilitated by local coronary occlusion and handheld stabilization.
Results: Between August 1994 and July 1997, 162 patients underwent minimally invasive direct coronary artery bypass grafting with the internal thoracic artery. The left and right internal thoracic arteries were used for grafting of the left anterior descending artery in 142 patients (88%), the proximal right coronary artery in 7 patients (4%), existing saphenous vein grafts in 5 patients (3%), and diagonal branches in 2 patients (1%). Sequential grafting with the left internal thoracic artery was performed in 2 patients (1%) and bilateral internal thoracic artery grafting was performed in 4 patients (3%). Eight patients (4.9%) died within 30 days after the operation, 3 of cardiac causes. Seven additional patients died during the follow-up period. Nine patients (5.6%) required reintervention for graft stenosis or occlusion during follow-up. Of 141 patients seen 2 or more weeks after the operation, 135 (96%) had resolution of their anginal symptoms at a mean follow-up of 12 months (range 0-31 months).
Conclusions: Anterior minimally invasive direct coronary artery bypass grafting with the internal thoracic artery avoids the risks of repeated sternotomy, aortic manipulation, and cardiopulmonary bypass. There was a low rate of reintervention, and patients had excellent resolution of anginal symptoms. Postoperative length of stay was comparatively short, and continued follow-up will be essential to evaluate long-term graft patency and patient survival.

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