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目的：观察持续逆行灌注冷血停搏液对心肌的保护作用。方法：在心脏停搏后以５５～７０ｃｍ高度的落差经冠状静脉窦逆行持续灌注低钾冷血停搏液，流量在４０～６０ｍｌ／ｍｉｎ。结果：持续逆灌组血中ＣＰＫ及ＣＰＫ－ＭＢ的含量在心脏停搏及复灌期间皆明显低于间断灌注组，术后心律失常发生率低，复灌后心输出量明显高于术前测值。结论：持续逆行灌注冷血停搏液具有更好的心肌保护作用。
Objective: To observe the protective effects of continuous retrograde perfusion of cold blood cardioplegia on myocardium. Methods: After cardioplegia, a continuous perfusion of hypokalemic cold cardioplegia through coronary sinus retrograde at a height of 55 ~ 70cm was performed at a flow rate of 40 ~ 60ml / min. Results: The levels of CPK and CPK-MB in the blood of CPB group were significantly lower than those in the CPB group during cardioplegia and reperfusion period. The incidence of postoperative arrhythmia was low, and the cardiac output was significantly higher after reperfusion Measured value. Conclusion: Continuous retrograde perfusion of cold blood cardioplegia has better myocardial protective effect.