Transcranial Doppler ultrasonography during head-upright tilt-table testing.
D000328:Adult; D002560:Cerebrovascular Circulation; D005260:Female; D006801:Humans; D013575:Syncope / Q000209:etiology*; D018667:Tilt-Table Test / Q000009:adverse effects; D017585:Ultrasonography, Doppler, Transcranial