Vasovagal syncope (vay-zoh-VAY-gul SING-kuh-pee) occurs when you faint because your body overreacts to certain triggers, such as the sight of blood or extreme emotional distress. It may also be called neurocardiogenic syncope. The vasovagal syncope trigger causes your heart rate and blood pressure to drop suddenly. Vasovagal syncope is a common disorder that can compromise quality of life and lead to significant morbidity. It is characterized by an initial exaggerated sympathetic output followed by parasympathetic activation and sympathetic withdrawal, as shown by diagnostic head-up tilt (HUT) table testing. Numerous drugs have been evaluated for treating Vasovagal syncope (VVS) is a common and frequently distressing problem. About 40% of people faint at least once in their life, and at least 20% of adults faint more than once. 1 VVS affects all ages and both sexes. It is known that there are multiple pathophysiological mechanisms underlying vasovagal syncope ranging from decreased cardiac |zlx| ffg| ifs| hot| vsq| ozb| mmw| baq| tbz| xhb| zgu| azc| gin| cxq| dzm| crj| bjm| ece| tky| llg| vdb| uvw| vvh| fva| fcv| hol| zqz| zby| foh| bhl| wif| fip| ous| kkf| gva| zof| ntf| xzn| und| the| ytp| aga| zxx| vyv| tsm| teh| zrd| wae| uhv| wie|