Effect of valsartan on calcium channel current and sodium-calcium exchanger current in heart failure rats / 中国病理生理杂志
Chinese Journal of Pathophysiology
;
(12)1986.
Artigo
em Chinês
| WPRIM
| ID: wpr-524463
ABSTRACT
AIM:
To determine the effects of valsartan on calcium channel and sodium-calcium exchanger current in isolated ventricular myocytes of congestive heart failure (CHF) rats.METHODS:
Eight weeks after coronary ligation, the rats with heart failure were confirmed by measuring the hemodynamic parameters and divided randomly into the group treating with valsartan (CHF-T, 20 mg/kg) and placebo (CHF-C). Sham-operated group rats served as negative controls (PS). Twelve weeks later, 6 rats were selected randomly for the study of ion channel. Single ventricular myocytes of rats were isolated by enzymatic dissociation. The whole-cell patch-clamp recording technique was used to record calcium channel current and sodium-calcium exchanger current.RESULTS:
(1) In the hemodynamic variables, HR and blood pressure were not significantly different in three groups. Compared CHF-C with PS group, LVEDP and Cm increased, LVSP and ?d p /d t max decreased ( P 0 05). (4) Na +-Ca 2+ exchanger current in CHF-C group increased significantly. Na +-Ca 2+ exchanger current in CHF-T group was smaller significantly than that in CHF-C group. However, CHF-T group and PS group were not significantly different.CONCLUSION:
Administration of valsartan is effective in preventing from cardiac function deterioration, increases calcium channel current and decreases Na +-Ca 2+ exchanger current in ventricular myocytes of heat failure rats.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Tipo de estudo:
Ensaio Clínico Controlado
Idioma:
Chinês
Revista:
Chinese Journal of Pathophysiology
Ano de publicação:
1986
Tipo de documento:
Artigo
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