病史调查 19例全为男性。①年龄分布;18～54岁,其中20～49岁17例。②家族史:19例家族中均无类似情况记载。晕厥次数:发生1次排尿性晕厥9例,2次27例,3次以上3例。③发病季节:冬春季节31次,夏秋季节5次。气候变化可能是影响的外因。④发病诱因:12次是在睡眠中,后起床小便时发生,4次是在疲劳情况下,3次是在酒后,17次是在无诱因情况下发生。发作前先兆:头晕,眼前发黑 19 cases of medical history were all men. ① age distribution; 18 to 54 years old, of which 20 to 49 years old in 17 cases. ② family history: 19 cases were no similar family records. Number of syncope: One case of urinary syncope occurred in 9 cases, 2 times in 27 cases, more than 3 times in 3 cases. ③ onset season: winter and spring 31 times, summer and autumn 5 times. Climate change may be the external factor of influence. The incidence of incentives: 12 times in sleep, after urination occurred, 4 times in the case of fatigue, 3 times in the drink, 17 times in the absence of incentives occurred. Pre-attack precursors: dizziness, black eyes