Effect of sodium tashinoneⅡA sulfonate on monophasic action potential and tachycardia-induced electrical remodeling of rabbit atria in vivo
- VernacularTitle:丹参酮Ⅱ-A磺酸钠对家兔心房动作电位及快速起搏所致心房电重构的影响
- Author:
Limin ZHU
;
Yibai FENG
;
Qiutang ZENG
- Publication Type:Journal Article
- Keywords:
rapid atrial pacing;
monophasic action potential;
electrical remodeling;
calcium overloading;
sodium tashinoneⅡA sulfonate
- From:
Chinese Pharmacological Bulletin
2003;0(11):-
- CountryChina
- Language:Chinese
-
Abstract:
Aim To determine the effects of sodium tashinoneⅡA sulfonate(TSN) on monophasic action potential(MAP) and tachycardia-induced electrical remodeling of rabbit atria in vivo.Methods Twenty-four rabbits were equally divided into two groups randomly: control group and TSN group.Electrical catheters were localized in the right atrium through right internal jugular vein.Right atrial MAP was recorded by multiple channel recording. ERP of right atrial(AERP) was assessed by programmed electrical stimulation before pacing and from 0～8 hours after the onset of the pacing.Results The AERP_(200 ms) of control group was shortened from (105.9?3.8) ms to(114.7?7.2) ms and the rate-dependent of control group's atrium was lost through the pacing process compared with TSN group before pacing(P
