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  • Title: Comparison of direct effects of clinically available vasodilators; nitroglycerin, nifedipine, cilnidipine and diltiazem, on human skeletonized internal mammary harvested with ultrasonic scalpel.
    Author: Fukuda S, Nakamura Y, Egi K, Fujioka S, Nagasaka S, Minh PN, Toguchi K, Wada T, Izumi-Nakaseko H, Ando K, Mizoue T, Takazawa K, Hosaka S, Sugiyama A.
    Journal: Heart Vessels; 2016 Oct; 31(10):1681-4. PubMed ID: 26820407.
    Abstract:
    Direct vasodilator effects of nitroglycerin, nifedipine, cilnidipine and diltiazem on human skeletonized internal mammary artery graft harvested with ultrasonic scalpel were assessed in the presence of 0.1 or 0.2 µM of noradrenaline. Ring preparations were made of distal end section of the bypass grafts, and those dilated by acetylcholine were used for assessment. Each drug dilated the artery in a concentration-related manner (0.01-10 µM, n = 6 for each drug) with a potency of nitroglycerin > nifedipine = cilnidipine > diltiazem. These results indicate that nitroglycerin can be useful for treating internal mammary artery spasm, that clinical utility of diltiazem may not depend on its vasodilator effect on the bypass graft, and that cilnidipine as well as nifedipine will have anti-spastic action which is in the middle between those of nitroglycerine and diltiazem.
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