Exercise-induced ventricular arrhythmias: analysis of predictive factors in a population with sleep disorders

• Autor(a) principal: Cintra,Fatima Dumas
• Data de Publicação: 2010
• Outros Autores: Makdisse,Marcia Regina Pinho, Oliveira,Wercules Antônio Alves de, Rizzi,Camila Furtado, Luiz,Francisco Otávio de Oliveira, Tufik,Sergio, Paola,Angelo Amato Vincenzo de, Poyares,Dalva
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Einstein (São Paulo)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-45082010000100062
• topic: Arrhythmias, Cardiac; Arrhythmias, cardiac/etiology; Arrhythmias, cardiac/epidemiology; Echocardiography, stress; Exercise test; Sleep apnea syndromes; Polysomnography; Causality; Sleep disorders; Sleep disorders/epidemiology; Anoxia

ABSTRACT Objective: To assess the prevalence of ventricular arrhythmias induced by exercise in a population with sleep disorders and to analyze the triggering factors. Methods: Patients were consecutively selected from the database of the Sleep Clinic of Universidade Federal de São Paulo. All subjects were submitted to basal polysomnography, blood sample collection, physical examination, 12-lead ECG, spirometry, cardiorespiratory exercise study on a treadmill, and echocardiogram. The Control Group was matched for age and gender. Results: A total of 312 patients were analyzed. Exercise-induced ventricular arrhythmia was observed in 7%. The aortic diameter was larger (3.44 ± 0.30, 3.16 ± 0.36, p = 0.04) and the minimal saturation was lower (92.75 ± 3.05, 95.50 ± 1.73, p=0.01) in the ventricular arrhythmia group when compared to controls, respectively. After correction of the aortic root to body surface, there was only a trend to a larger diameter being associated with the emergence of arrhythmia. Conclusions: Exercise-induced ventricular arrhythmia was observed in 7% of sample and it was associated with lower oxygen saturation during exercise.