The isometric twitch duration was not altered during 1 mmol/L BDM of perfusion,but was shortened at 10 mmol/L dose.

• 低浓度BDM(1 mmol/L)仅降低骨骼肌等长收缩的Pt而不影响其收缩时程,高浓度(10 mmol/L)下使收缩时程明显缩短。