HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Personal Folders Download to citation manager Author home page(s): Kwang Ree Cho Dong Soo Lee Ki-Bong Kim Permission Requests Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Cho, K. R. Articles by Kim, K.-B. Search for Related Content PubMed PubMed Citation Articles by Cho, K. R. Articles by Kim, K.-B.

J Thorac Cardiovasc Surg 2007;133:52-57
© 2007 The American Association for Thoracic Surgery

Cardiopulmonary Support and Physiology

Progressive improvement of myocardial perfusion after off-pump revascularization with bilateral internal thoracic arteries: Comparison of early versus 1-year postoperative myocardial single photon emission computed tomography

^a Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul, Korea
^b Department of Nuclear Medicine, Seoul National University Hospital, Seoul, Korea.

Received for publication May 23, 2006; revisions received August 3, 2006; accepted for publication September 6, 2006.

^_* Address for reprints: Ki-Bong Kim, MD, PhD, Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, 28, Yeongeon-dong, Jongno-gu, Seoul 110-744, Korea (Email: kimkb{at}snu.ac.kr).

OBJECTIVE: We evaluated the time course of myocardial perfusion improvement after off-pump revascularization.

METHODS: Seventy-six patients who underwent off-pump coronary bypass with bilateral internal thoracic arteries for revascularization of the left coronary territory were studied. Myocardial single photon emission computed tomography was performed preoperatively and at 3 months and 1 year postoperatively. Myocardial perfusion was quantified with automatic software, and the left coronary territory was divided into 16 segments. As an indicator of the ischemic myocardium, the reversibility score was defined as a measure of rest minus stress perfusion values. A total of 403 segments that showed a reversibility score of 7 or greater preoperatively were included.

RESULTS: The reversibility score was improved significantly at 3 months postoperatively (P < .001) and further improved 1 year after the operation (P < .001). When the patients were divided into 2 groups based on the type of bilateral internal thoracic arteries used (group Y: Y-composite graft, n = 39; group I: bilateral in situ grafts, n = 37), the reversibility score was improved significantly 3 months after the operation (P < .001) and further improved 1 year after the operation (P < .001) in both groups. There were no significant differences in the reversibility scores between groups Y and I at postoperative month 3 (P = .463). The scores approached zero in both groups at 1 year postoperatively (group Y, –1.7% ± 7.9%; group I, 1.3% ± 7.2%).

CONCLUSIONS: The myocardial reversibility score improved greatly during the first 3 months after the operation and further improved until 1 year postoperatively. Perfusion improvement was similar between the Y-composite and bilateral in situ internal thoracic artery grafts in terms of the reversibility score.

This article has been cited by other articles:

				H. Y. Hwang, J. S. Kim, K. R. Cho, and K.-B. Kim Bilateral Internal Thoracic Artery In Situ Versus Y-Composite Graftings: Five-Year Angiographic Patency and Long-Term Clinical Outcomes Ann. Thorac. Surg., August 1, 2011; 92(2): 579 - 586. [Abstract] [Full Text] [PDF]

				H. Y. Hwang, J. S. Kim, and K.-B. Kim Angiographic Equivalency of Off-Pump Saphenous Vein and Arterial Composite Grafts at One Year Ann. Thorac. Surg., August 1, 2010; 90(2): 516 - 521. [Abstract] [Full Text] [PDF]

				C. Y. Kim, H. Y. Hwang, J. C. Paeng, D. S. Lee, and K.-B. Kim Improved Myocardial Perfusion and Thickening After Off-Pump Revascularization: 5-Year Follow-Up Ann. Thorac. Surg., November 1, 2009; 88(5): 1419 - 1425. [Abstract] [Full Text] [PDF]