Three agents with K(+)-channel-opening activity--nicorandil, bimakalim (EMD 52692), and EMD 56431--were tested for vasorelaxation abilities in human coronary artery and human arteria mammaria. The potency orders were bimakalim = EMD 56431 >> nicorandil for relaxation in human coronary artery and bimakalim = EMD 56431 >> nicorandil in human arteria mammaria. These data demonstrate that K(+)-channel openers are effective vasorelaxant agents in human coronary artery and human arteria mammaria. Bimakalim and EMD 56431 were more potent than nicorandil, a drug that also activates guanylate cyclase.
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| http://dx.doi.org/10.1097/00005344-199206203-00004 | DOI Listing |
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