Methods: the effect of gi on frequency of angina attacks, ECG, nitric oxide (NO) and endothelin (et) were observed and contrasted with that of nitroglycerin.
方法选择硝酸甘油针剂作对照，观察其对心绞痛发作频率、心电图、一氧化氮(NO)及内皮素(et)的影响。
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