title: High altitude-related neurocardiogenic syncope.
abstract: This report presents a well-documented link between vasodepressor syncope, a marked increase of LF/HF ratio response to orthostasis (sympathetic dominance), and the efficacy of beta blockers in preventing orthostatic symptoms and absence of tilt-induced syncope, with normalization of the LF/HF ratio response.
authors.affiliation: Centro de Estudos da Função Autonómica, Oporto, Portugal.
authors.forename: J
authors.initials: J
authors.lastname: Freitas
authors.forename: O
authors.initials: O
authors.lastname: Costa
authors.forename: M J
authors.initials: MJ
authors.lastname: Carvalho
authors.forename: A
authors.initials: A
authors.lastname: Falcão de Freitas
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000627:therapeutic use; D000328:Adult; D000531:Altitude; D001262:Atenolol / Q000627:therapeutic use; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D013564:Sympathetic Nervous System / Q000503:physiopathology; D013575:Syncope / Q000209:etiology / Q000503:physiopathology* / Q000517:prevention & control
chemical_list: D000319:Adrenergic beta-Antagonists; D001262:Atenolol