Abstract
Some vasovagal syncope (WS) patients developed tachycardia during the head-up tilt test (HUTT), of which bradycardia is the most common. There are different in shape of ECG waves between HUTT negative patients and HUTT positive patients.The dysfunction of autonomic nerve system could be the main reason.It could be helpful in diagnosis and treatment of VVS to leant the ECG change and its predictive value of HUTT result, effect of treatment and prognosis. Key words: Vasovagal syncope; Electrocardiography
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