摘要
目的：研究多阶段异丙肾上腺素倾斜试验（MITTT）诊断血管迷走神经性晕厥。方法：将20例不明原因晕厥患者为研究组；12例健康者为对照组。行MITTT，心率-收缩压乘积值≤9000mmHg／min的阳性患者应用心得安治疗2周。结果：研究组MITTT阳性14例（70％），对照组1例阳性，治疗2周后MITTT11例转阴性（78.6％）。结论：不明原因晕厥患者中血管迷走神经性晕厥（VS）占大多数；MITTT较单纯的倾斜试验（TTT）更能提高阳性检出率；心率-收缩压乘积值≤9000mmHg／min有助于鉴别阳性结果。心得安治疗VS有效。
Obiective: To apply multistage isoproterenol tilt table test (MITTT) in the diagnosis of vasovagal syncope (VS).Materials and Methods: Divided the subjects into two groups: unexplained syncope group (2O cases) and normal group (12cases). ffeth groups were under taken MITTT. The positive aptients presented w1th systoIle blood pressure (SBP) heart rate(HR)<9000 mmHg/min and were treated with propranold for 2 weeks. Results: The positive MITTT was 70 % (14 cases)in synope group with 9 % (1 case) in normal group. After treatment. 11 cases (78. 6 % ) showed MITTT to be negative.Conclusion: Most of patients with unexplained syncope had VS. The Positive MITTT was higher than that of TTT for diag-nosis of VS. During MITTT, HR × SBP<9000 mmHg/min suggested the presence of VS. The treatment of VS withpropanolol is effective.
