Circulation Journal
Online ISSN : 1347-4820
Print ISSN : 1346-9843
ISSN-L : 1346-9843
Clinical Investigation
Beneficial Effect of Coronary Artery Bypass Grafting as Assessed by Quantitative Gated Single-Photon Emission Computed Tomography
Satoshi HidaTaishiro ChikamoriTetsuzo HirayamaYasuhiro UsuiHidefumi YanagisawaTakayuki MorishimaShin IshimaruAkira Yamashina
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2003 Volume 67 Issue 6 Pages 499-504

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Abstract

The development of quantitative gated single-photon emission computed tomography (SPECT) has enabled the assessment of left ventricular perfusion, function and wall thickness in a single examination. Accordingly, the present study used gated SPECT to assess the benefit of coronary artery bypass grafting (CABG) in patients with coronary artery disease; 47 of those patients were evaluated before and 5 months after CABG. As a result of coronary revascularization, a significant improvement was observed in global ejection fraction (50±12 → 53±11%; p<0.05). In 107 revascularized territories, the average regional reversible defect score (0.8±0.5 → 0.2 ±0.3; p<0.0001), average regional perfusion score at rest (0.6±0.6 → 0.3±0.4; p<0.0001), average regional wall motion score (0.9±0.7 → 0.7±0.5; p<0.05), and end-diastolic wall thickness (8.1±1.3 → 8.6±1.5 mm; p<0.0005) all improved significantly. Even in 34 non-revascularized territories, the average regional reversible defect score (0.5±0.7 → 0.2±0.5; p<0.03), average regional wall motion score (0.8±1.1 → 0.5 ±1.0; p<0.03) and end-diastolic wall thickness (8.0±1.4 → 9.1±2.0 mm; p<0.03) all improved significantly. These results indicate that improvement in myocardial ischemia, hibernation and left ventricular function with CABG can be assessed in detail with gated SPECT. (Circ J 2003; 67: 499 - 504)

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© 2003 THE JAPANESE CIRCULATION SOCIETY
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