【摘要】 提出对晕厥患者进行倾斜试验以明确病因的方法。着重研究了有关影响因素如不同原发疾病、不同异丙肾上腺素给药浓度、不同倾斜持续时间以及不同抑制晕厥发作药物对该试验的影响及意义。结果显示，倾斜试验是诊断血管迷走性晕厥的重要方法。更多还原

【Abstract】 Passive head-up tilt test with and without infusion of isoproterenol was performed in the investigation and management Of 70 patients.Some related factors such as causes of syncope, concentrations of isoproterenol,durations of tilt, etc. were studied, 40 in the testing group had syncope of unknown origin, while 30 in the control group had syncope of known causes.Head-up tilt test was considered as positive if syncope developed in association with hypotension, bradycardia, or both, 24 (60%) and 2 (6.67%) in the testing and control groups had positive response, respectively (p<0.01).Twenty four patients with positive result in the testing group received atenolol or atropine or 654-2 randomly,the efficacy was evaluated by another tilt test which became negative in all of them,and over a follow-up period of 3-6 months no further syncope appeared.Conclusion:Head-up tilt testing is a useful diagnostic method in syncope of vasodepressor -type.更多还原