Effects of rhomotoxin on electrophysiologic parameters in rabbit heart / 中国临床药理学与治疗学

ABSTRACT

Aim To study effects of rhomotoxin (Rh) on electrophysiologic parameters in rabbit heart. Methods The rabbit hearts in vivo were injected with Rh 12.5 ?g?kg-1 , 25 ?g?kg-1 or saline iv respectively and the isolated rabbit hearts were perfused by Krebs-Henseleit(K-H) perfusion liquid containing Rh 0.34 ?mol?L-1 or 0.68 ?mol?L-1. The electrophysiologic parameters were observed before and after drug adminitration.Results At 20,40,60 and 80 min after injection of Rh 12.5 ?g?kg-1 iv,the VDT,ERP and RRP had no significant changes; but at 20,40,60 and 80 min after injection of Rh 25 ?g?kg-1 iv a significant prolongation of ERP and (or) RRP was found (P