A signal center follow-up study on the treatment of postural tachycardia syndrome in children

目的：比较盐酸米多君＋口服补液盐、美托洛尔＋口服补液盐及单纯口服补液盐3种治疗方法对儿童体位性心动过速综合征（POTS）的疗效。方法 POTS 患儿共192例，分为盐酸米多君＋口服补液盐组（84例）、美托洛尔＋口服补液盐组（54例）及口服补液盐组（54例）。患儿治疗3个月后门诊随访，进行治疗后症状评分并复查直立试验，以判断其短期疗效，并了解药物不良反应；对所有接受治疗的患儿进行电话随访，判断患儿停止治疗后 POTS 症状的发生情况，应用 Kaplan-Meier 曲线比较各组患儿长期随访累计治疗效果，以判断药物治疗的长期疗效，随访时间3~122（42.7±24.3）个月。结果短期疗效：治疗后所有患儿症状评分均有降低（t ＝21.536，P ﹤0.001），在门诊随访中的直立试验结果表明，患儿的卧立位心率差值较治疗前均有降低。盐酸米多君＋口服补液盐组和美托洛尔＋口服补液盐组治疗有效率明显高于单纯口服补液盐组（χ2＝10.905，P ＝0.004），但是盐酸米多君＋口服补液盐组和美托洛尔＋口服补液盐组治疗有效率比较差异无统计学意义（χ2＝0.042，P ＝0.837）。长期疗效：应用 Kaplan-Meier 曲线比较各组患儿长期随访累积治疗效果，结果显示盐酸米多君＋口服补液盐长期累积有效率最高（χ2＝13.299，P ﹤0.01），美托洛尔＋口服补液盐组和单纯口服补液盐组长期累积有效率比较差异无统计学意义（χ2＝0.150，P ＝0.699）。结论短期疗效表明，盐酸米多君＋口服补液盐组和美托洛尔＋口服补液盐组治疗有效率明显高于单纯口服补液盐组；长期疗效表明，与美托洛尔＋口服补液盐、单纯口服补液盐相比，盐酸米多君＋口服补液盐治疗 POTS 的疗效更佳。Objective To compare the therapeutic effect of Midodrine hydrochloride plus oral rehydration salts,Metoprolol plus oral rehydration salts and simple oral rehydration salts on children with postural tachycardia syn-drome(POTS). Methods One hundred and ninety - two children with POTS were divided into Midodrine hydrochlo-ride plus oral rehydration salts group(84 cases),Metoprolol plus oral rehydration salts group(54 cases)and oral rehy-dration salts group(54 cases). The patients were followed up at the outpatient department after 3 - months treatment. Short - term effect was analyzed by reevaluating the symptom scores,repeating upright test and studying the side effects of the drugs. All the children were followed - up by telephone,mainly investigating on the syndrome recurrence and symptom - free survival by Kaplan - Meier analysis. The follow - up time was 3 to 122(42. 7 ± 24. 3)months. Results Short - term effect showed that the symptom scores were decreased after treatment(t = 21. 536,P ﹤ 0. 001). Head -up test showed that delta heart rate was decreased. The effective rates in the Midodrine hydrochloride plus oral rehydra-tion salts group and the Metoprolol plus oral rehydration salts group were significantly higher than those of the simple oral rehydration salts group(χ2 = 10. 905,P = 0. 004). But no statistical difference was found between the Midodrine hydrochloride plus oral rehydration salts group and the Metoprolol plus oral rehydration salts group(χ2 = 0. 042,P =0. 837). Long - term effect by Kaplan - Meier curve showed that the therapeutic effect of Midodrine hydrochloride plus oral rehydration salts group was significantly higher than any of the other two groups(χ2 = 13. 299,P ﹤ 0. 01),but no statistical difference was found between the Metoprolol plus oral rehydration salts group and the simple oral rehydration salts group(χ2 = 0. 150,P = 0. 699). Conclusions In terms of the short - term result,the effective rates in the Mido-drine hydrochloride plus oral rehydration salts group and the Metoprolol plus oral rehydration salts group were signifi-cantly higher than those of the simple oral rehydration salts group. The therapeutic effect of the Midodrine hydrochloride plus oral rehydration salts was superior to that of the Metoprolol plus oral rehydration salts and the simple oral rehydra-tion salts for POTS children by the long - term follow - up study.“十二五”国家科技支撑计划中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)13983-9873