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Effect of glimepiride on the electrical activity of isolated rabbit heart muscle.

The effect of glimepiride (CAS 93479-97-1) on the electrical threshold, conduction time, effective refractory period and automaticity of left atrium and right ventricle in the isolated rabbit heart was investigated and compared with those of chlorpropamide and glibenclamide. From the sulphonylureas investigated only glibenclamide diminished the electrical activity of rabbit heart muscle preparations. Chlorpropamide and glimepiride have a mild effect to change the basic parameters on the opposite direction. It seems that glimepiride does not have a significant effect on cardiac muscle in vitro.