Cardiovascular characterization of SD-3211, a novel benzothiazine calcium channel blocker, in isolated rabbit hearts.
The cardiovascular effects of SD-3211, a novel benzothiazine Ca++ channel blocker, were compared with those of diltiazem and nicardipine in Langendorff-perfused rabbit hearts. SD-3211 was more potent in increasing coronary artery flow than in depressing cardiac function (i.e., contractile force, heart rate and conduction time). The relative specificity of SD-3211 for coronary vasodilation to cardiodepression was clearly greater than that of diltiazem, but less than that of nicardipine. Thus, the present study demonstrates that SD-3211, despite a non-dihydropyridine type of Ca++ channel blocker, can be characterized as a potent coronary vasodilator with a little effect on cardiac function.
Miyawaki
N
N
Central Research Laboratories, Santen Pharmaceutical Co., Ltd., Osaka, Japan.
Furuta
T
T
Shigei
T
T
Yamauchi
H
H
Iso
T
T
D000818:Animals; D002121:Calcium Channel Blockers / Q000494:pharmacology*; D002319:Cardiovascular System / Q000187:drug effects*; D003326:Coronary Circulation / Q000187:drug effects; D004110:Diltiazem / Q000494:pharmacology; D005260:Female; D006321:Heart / Q000187:drug effects*; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects; D009529:Nicardipine / Q000494:pharmacology; D010477:Perfusion; D011817:Rabbits; D013844:Thiazoles / Q000494:pharmacology*
D002121:Calcium Channel Blockers; D013844:Thiazoles; D009529:Nicardipine; C064356:sesamodil; D004110:Diltiazem