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J Thorac Cardiovasc Surg 2005;130:340-345
© 2005 The American Association for Thoracic Surgery

Cardiopulmonary Support and Physiology

Bilateral internal thoracic artery grafting with and without cardiopulmonary bypass: Six-year clinical outcome

^a Division of Cardiac Surgery, University Hospital, Torino, Italy
^b Department of Cardiology and Cardiac Surgery, "G D’Annunzio" University, Chieti, Italy

Received for publication September 23, 2004; revisions received November 20, 2004; accepted for publication November 30, 2004.

^_* Address for reprints: Antonio Maria Calafiore, MD, Division of Cardiac Surgery, "S Giovanni Battista" Hospital, c.so Bramante 86, Torino, Italy (Email: calafiore{at}unich.it).

OBJECTIVES: We sought to evaluate whether early and late results in patients who underwent off-pump or on-pump myocardial revascularization with bilateral internal thoracic artery grafting were similar.

METHODS: From November 1994 through December 2001, 1835 patients underwent isolated myocardial revascularization with bilateral internal thoracic artery grafting. By applying propensity score pairwise matching, 1194 patients were selected and operated on either off pump (n = 597) or on pump (n = 597).

RESULTS: The overall 30-day mortality was 1.5% (1.2% in the off-pump group and 1.8% in the on-pump group, P = .342). There was no difference for all the other complications between the 2 groups. Mean follow-up was 5.2 ± 1.8 years. Forty-two patients died over the follow-up period (22 in the off-pump group and 20 in the on-pump group), 15 of them of cardiac causes (7 in the off-pump group and 8 in the on-pump group). Six-year outcomes (freedom from death, cardiac death, acute myocardial infarction and reoperation in all or in the grafted area, target cardiac events, and any other event) were similar for both categories. After a mean of 30.7 ± 20.1 months, 202 patients had a postoperative angiography showing similar results.

CONCLUSIONS: Our results with extensive arterial revascularization clearly show that with the technical improvements achieved in the most recent years, off-pump operations can be performed safely with the same quality of late results as those obtained with on-pump operations.

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