女，68岁。1年前于坐位早餐时无明显诱因突感心悸，随之意识丧失跌倒，数分钟后意识恢复，无大汗、肢体抽搐、口吐白沫和大小便失禁。1年来反复发作上述症状3次。发作体位和运动无关。查体：（）
A.低血糖
B.心律失常
C.癫痫发作
D.体位性低血压
E.迷走神经张力增高
参考答案：B
解析：
患者主要症状为突然发作意识丧失，发作前心悸，心电图示二度Ⅱ型房室传导阻滞，考虑心律失常可能性大。患者突发症状，且正在进食，可排除低血糖。发作与体位和运动无关，可排除体位性低血压。癫痫发作多伴大汗、肢体抽搐、口吐白沫和大小便失禁。
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| Mrs. Black was a famous musician several years ago. She 1 music at a school and her students did well in their lessons. They liked her very much. 2 the old woman stays at home with her husband. The old man looks after his wife well and she is 3 worried about anything. Her students 4 forget their teacher when they win their prizes. She often 5 some presents on her birthday and at Christmas , and she is very 6 . Just like some old people, Mrs. Black finds that her 7 is falling. Sometimes she forgets 8 she did or will do . It often gets her in 9 . Her 10 has noticed it and asked her to see a famous doctor who lives in the capital. He bought two tickets 11 London and told her to put 12 into her handbag while she was playing the piano. The next morning, when they reached the 13 just in time to catch plane, Mrs. Black said, “I wish we'd brought the 14 with us.” "Don't be a fool, dear!” said Mr. Black. “We are not going to hold a concert, but to see a 15 .” | ||||
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