Source: Annual Congress 2010 - Nocturnal cardiology: chronic heart failure, acute chest syndrome, coronary artery disease and collagen vascular disease

Abstract

Background: Patients with congestive heart failure (CHF) may present pleural effusion. However, the reason for the side predominance of the pleural effusion remains unclear 1,2. We hypothesized that the side of the pleural effusion is gravity dependent and is related to sleeping position.
Objetives: To evaluate the correlation between decubitus position predominance during sleep in patients with CHF and pleural effusion localization.
Methods: Patients with CHF and pleural effusion underwent overnight portable monitoring with body position detection. Computed tomography was performed in all patients to determine the volume of pleural effusions before sleep study.
Results: We studied 14 patients (9 males), age 64 ± 13 ys, body mass index 26 ± 4 kg/m2 and ejection fraction 40 ± 16%. 12 and 2 patients present predominantly right and left sided pleural effusion. 10 out of 12 and 2 out of 2 slept predominantly on the right and left side, respectively, with on overall match of 71.49% side of pleural effusion/ decubitus.
Conclusions: These preliminary results suggest that pleural effusion localization in patients with CHF is depending on decubitus at night.
1. Leung RST et al. Avoidance of the left lateral decubitus position during sleep in patients with heart failure: relationship to cardiac size and fuction. JAAC 2003; 41: 227-30
2. McPeak EM, Levine SA. The preponderance of right hydrothorax in congestive heart failure. Ann Intern Med 1946; 25: 916-27

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Citations should be made in the following way:
B. Marcondes, F. Vargas, L. Teixeira, L. Kumamoto, E. Genofre, P. Genta, G. Lorenzi-Filho (Sao Paulo, Brazil). Is the side of the pleural effusion depends the body position during sleep on pleural effusion in patients with congestive heart failure?. Eur Respir J 2010; 36: Suppl. 54, 920

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