ABSTRACT
Ⅳ, SVR and PVR decreased markedly at the same time MERO 2 and MDO 2/MVO 2 dod not change significantly but MVO 2/MDO 2 showed a tendency of decreasing after the inotropics administration compared with the control group Electronic microscopy examinations: 30min after the inotropics were stoped, the myocardial ultrastructure of ischemic area did not improved significantly in group Ⅱ and Ⅲversus the group Ⅰ, but in group Ⅵ, Ⅴ and Ⅳ, the interstitial and intracellular edema reduced markedly, the capillary stasis vanished, and very few vacuole could be seen in mitochondria Conclusions 1 The response of stunned myocardium to ? agonists decreases 2 Inotropic can restore regional work by restoring mechanical synchrony and improving energy efficiency, the effects of combined inotropics are better than the inotropics given alone in myocardial stunning