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  • Title: [Blood flow analysis of aorto-coronary bypass graft using a Doppler catheter--with special reference to comparison of SVG with IMAG].
    Author: Moriya H, Seki A, Yasuura K, Matsuura A, Abe T, Hanya S.
    Journal: Nihon Geka Gakkai Zasshi; 1991 Jun; 92(6):722-6. PubMed ID: 1886577.
    Abstract:
    Since June to December, 1988, 46 patients had aorto-coronary bypass grafting (CABG) to the left anterior descending artery. Fifteen patients among them were subjected to this study. In 8 cases the internal mammary artery (IMAG group) was used and in 7 cases the saphenous vein graft was chosen as a bypass material (SVG group). Mean periphery anastomotic portion was 2.3 +/- 0.5 places for each group. Within two months after operation, intra-graft flow velocity was measured using a Doppler catheter. Mean cross sectional areas of the graft were 13.3 +/- 8.4 mm2 in the SVG group and 6.0 +/- 1.2 mm2 in the IMAG group. Peak flow velocity in diastole in SVG group and IMAG group were 9.9 +/- 2.7 cm/sec and 15.9 +/- 8.9 cm/sec, respectively (p less than 0.05). Also flow velocity in SVG (6.7 +/- 1.8 cm/sec) was significantly (p less than 0.05) lower than that in IMAG (12.1 +/- 6.4 cm/sec) in systole. There were no significant differences in peak, mean and integrated D/S ratio between SVG and IMAG as follows, peak D/S ratio: 1.6 +/- 0.3 in SVG, 1.4 +/- 0.4 in IMAG, mean D/S ratio: 1.5 +/- 0.3 in SVG, 1.4 +/- 0.4 in IMAG, integrated D/S ratio: 2.0 +/- 0.4 in SVG, 2.7 +/- 0.9 in IMAG. It is concluded that no significant differences were demonstrated between SVG and IMAG as to the intra-graft flow velocity profile at least in 2 months after operation.
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