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A3型题男性，65岁，以往有劳力型心绞痛，长期服用硝酸甘油，病情尚稳定，近1月来胸痛又发作，部位于胸骨下段，且多发生在午睡时或晚间入睡后，服硝酸甘油无效，起床站立后可缓解。以往有胆石史但从无发作。 一周来患者胸痛，发作在清晨5时，且疼痛时间较长，心电图示V1～3，导联ST段抬高，此时诊断应考虑是（）
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RoniLebaver 222 Main St.Laguna Beach,CA 92651 USADear Roni, Italy is wonderful. We started in Rome two weeks ago, drove to Florence last week and now we’re on our way to Venice. Three weeks just isn’t enough. The country near Florence is so beautiful -- hills, olive trees. And red roofs of the houses look so nice far away. I am afraid I am getting bigger -- the food here is so delicious! Love, AkemiRoniLebaver 222 Main St.Laguna Beach,CA 92651 USADear Roni, Hi, Roni, l can’t believe you went to school here in Honolulu! Why did you leave I spend each morning on the beach(海滩) and in the water. The sand is so soft and the beaches seem so long. The water is just the right temperature. One afternoon, I left the beach to walk in mountains near Honolulu. I enjoyed myself very much there. How I miss you! MariaRoniLebaver 222 Main St.Laguna Beach,CA 92651 USADear Roni, Maybe I’m strange but I love the desert(沙漠)! Last week our group spent four days in the desert. At times, it felt like the moon. I always thought deserts were all the same! They are not. Some parts look like mountains; others are really different. And when we find something green -- a few palm trees, a little water, we feel good and great. See you in September. Kim Where does Roni live
A3型题男性，66岁，高血压病10年，劳力性心前区疼痛2年。平时活动量稍大或上三楼时出现胸部疼痛，休息缓解。近1个月发作频繁，1～2次/天，约15分/次，休息时也有发作。发作时做心电图ST段压低。 心绞痛的严重程度分级是（）
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