直立倾斜试验

Head-up tilt test

直立倾斜试验是诊断儿童晕厥的重要诊断方法，主要有基础直立倾斜试验和舌下含化硝酸甘油激发试验。本试验应用多导生理监护仪监测患儿心率和血压变化，同时记录临床症状。根据患儿在试验中的表现、血压及心率的变化，可以判断相应的疾病，如血管迷走性晕厥、体位性心动过速综合征及直立性低血压等。在应用该试验中，应该严密监测血流动力学变化，一定要取得患儿家长的知情同意。

Head-up tilt test （HUTF） is an important method of diagnosing the syncope m children. It includes baseline HUTY （BHUTI＇） , and sublingual nitroglycerin-provocated HUTY （SNHUTF）. Physiological monitor is used to monitor the heart rate and blood pressure changes. At the same time, clinical pictures are recorded. According to clinical manifestations ,heart rate and blood pressure of the children in HUTT, the corresponding symptoms including vasovagal syncope,postural orthostatic tachyeardia syndrome and orthostatic hypotension can be diagnosed. During the test, it is necessary to monitor the hemodynamic changes and the informed consent should be obtained from parents.