Ultrasound vasography evaluation of radial arterial grafts used for coronary arterial bypass surgery |
| |
Authors: | Keishi Ueyama Bunji Kaku Hirokazu Ohashi Yasushi Tsutsumi Takahiro Kawai Tetsuyuki Ueda Masateru Ohnaka |
| |
Affiliation: | Department of Thoracic Surgery, Maizuru Mutual Hospital, 1035 Hama, Maizuru, Kyoto 625-8585, Japan. |
| |
Abstract: | OBJECTIVES: For coronary bypass surgery, radial arteries are often used as bypass grafts. Some of these arteries however, have arteriosclerotic lesions. We attempted to evaluate the relationship between arteriosclerosis and vasodilation. METHODS: Prior to bypass surgery, 20 patients underwent ultrasound vasography to determine the condition of their radial and brachial arteries. Flow-mediated dilation, which is the same as endothelium-dependent vasodilation, was measured in the brachial artery of the nondominant arm by reactive hyperemia after 5-minute forearm ischemia. Vasodilation after application of a sublingual glyceryl trinitrate spray was also measured. RESULTS: During surgery, 4 of 20 radial arteries demonstrated calcification, and 3 of the 4 could be used by removing the calcified part. However, the other artery, which had extensive calcification that could not be detected by ultrasound vasography, was discarded. The amount of vasodilation seen after the administration of sublingual glyceryl trinitrate had no correlation with calcified grafts. Calcified radial arteries demonstrated significantly poor brachial artery vasodilation by an endothelial-dependent vasodilation test. CONCLUSIONS: Calcification in radial arteries can thus only be evaluated by flow-mediated dilation. |
| |
Keywords: | coronary arterial bypass surgery radial arterial graft ultrasound vasography endothelium-dependent vasodilation flow-mediated dilation |
本文献已被 SpringerLink 等数据库收录! |
|