Einstein (São Paulo) (Mar 2010)

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

  • Fatima Dumas Cintra,
  • Marcia Regina Pinho Makdisse,
  • Wercules Antônio Alves de Oliveira,
  • Camila Furtado Rizzi,
  • Francisco Otávio de Oliveira Luiz,
  • Sergio Tufik,
  • Angelo Amato Vincenzo de Paola,
  • Dalva Poyares

DOI
https://doi.org/10.1590/s1679-45082010ao1469
Journal volume & issue
Vol. 8, no. 1
pp. 62 – 67

Abstract

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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.

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