A<unk>  can be done in different ways and be modified for individual circumstances. In some cases, the patient will be strapped to a<unk><unk>  lying flat and then<unk> ed or suspended completely or almost completely upright (as if standing). Most of the time, the patient is suspended at an angle of 60 to 80 degrees. Sometimes, the patient will be given a drug, such as glyceryl trinitrate (nitroglycerin) or isoproterenol, to create further susceptibility to the test. In all cases, the patient is instructed not to move. Symptoms, blood pressure, pulse, electrocardiogram, and sometimes blood oxygen saturation are recorded. The test either ends when the patient faints or develops other significant symptoms, or after a set period (usually from 20 to 45 minutes, depending on the facility or individualized protocol).
Tilt table test
Hill test
Cover test
Sphygmograph
Evoked potential
Cardiotocography
Vectorcardiography
Tensilon test