Rowland E, Evans T, Krikler D
Br Heart J. 1979 Aug;42(2):124-7. doi: 10.1136/hrt.42.2.124.
Intravenous nifedipine, a powerful calcium antagonist, had no obvious effect on atrioventricular conduction when administered to 11 patients during routine intracardiac electrophysiological studies. Verapamil on the other hand showed potent antiarrhythmic properties, depressing atrioventricular nodal conduction. Nifedipine thus appears safe in patients with angina pectoris who have disorders of atrioventricular nodal conduction, and in those receiving beta-adrenergic blocking drugs. There appear to be differential effects on the slow inward channels of cardiac cells with different 'calcium antagonists'.
静脉注射硝苯地平(一种强效钙拮抗剂),在对11例患者进行常规心内电生理研究时给药,对房室传导无明显影响。另一方面,维拉帕米显示出强效抗心律失常特性,可抑制房室结传导。因此,硝苯地平对于患有房室结传导障碍的心绞痛患者以及正在接受β-肾上腺素能阻滞剂治疗的患者似乎是安全的。不同的“钙拮抗剂”对心肌细胞慢内向通道似乎有不同的作用。