Post-Resuscitation Cardioprotection---(I) Mechanisms and Effects of ""Postconditioning""; (II) Combination of Postconditioning and Therapeutic Hypothermia---Effects and Mechanisms=心跳停止/心肺復甦後心臟保護之研究---(i) "Postconditioning"之效果及機轉探討; (ii)合併Postconditioning和治療性低溫之效果及機轉探討