title: [Neurocardiogenic syncope: its pathogenesis, diagnosis and treatment].
abstract: Neurocardiogenic syncope seems to be the most common cause of syncope. It is believed to be triggered by paradoxical autonomic reflexes, beginning in the ventricular mechanoreceptors of the heart, modulated by the brain stem and terminating in the autonomic efferent pathways (parasympathetic stimulation with bradycardia or asystole and sympathetic inhibition with severe hypotension). Tilt test has been used recently, as a safety and effective tool to identify subjects prone to syncope. Although the pathophysiology of this syndrome is not completely understood, pharmacological therapeutics seems very effective in resolving symptoms.
authors.affiliation: Centro de Estudos da Função Autonómica, Hospital de São João, Porto, Portugal.
authors.forename: J
authors.initials: J
authors.lastname: Freitas
authors.forename: J
authors.initials: J
authors.lastname: Puig
authors.forename: M
authors.initials: M
authors.lastname: Pizarro
authors.forename: O
authors.initials: O
authors.lastname: Costa
authors.forename: M
authors.initials: M
authors.lastname: Carvalho
authors.forename: A F
authors.initials: AF
authors.lastname: de Freitas
mesh_terms: D001341:Autonomic Nervous System / Q000503:physiopathology; D002560:Cerebrovascular Circulation; D006321:Heart / Q000503:physiopathology; D006801:Humans; D013575:Syncope / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology / Q000628:therapy; D018667:Tilt-Table Test
vernacular_title: Síncope neurocardiogénica: patogenia, diagnóstico e tratamento.