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  • Title: Electroencephalographic and electrocardiographic features of vasovagal syncope induced by head-up tilt.
    Author: Grossi D, Buonomo C, Mirizzi F, Santostasi R, Simone F.
    Journal: Funct Neurol; 1990; 5(3):257-60. PubMed ID: 2283099.
    Abstract:
    Two hundred and seventy-nine consecutive patients referred for transient loss of consciousness, compatible with syncope, underwent head-up tilt to 70 degrees during polygraphic (EEG, ECG, pneumographic) and blood pressure monitorings. Vasovagal syncopes occurred in 28 patients with the following EEG changes: progressive slowing until the appearance of middle or high amplitude delta waves generalized and synchronous in 9 patients; delta waves suddenly followed by transient flattening of EEG activity in 16 patients. In 2 patients EEG could not be interpreted because of muscle and/or movement artifacts. Fifteen out of 28 patients exhibited a marked cardioinhibition, expressed by long-lasting cardiac pauses; a relationship between duration of EEG flat and duration of asystole was not found.
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