Evaluation of the visual function in obstructive sleep apnea syndrome patients and normal-tension glaucoma by means of the multifocal visual evoked potentials.

Background: This study was designed to objectively evaluate visual function and the causal relationship between sleep apnea and optic nerve dysfunction in patients with obstructive sleep apnea syndrome (OSAS) with or without diagnosis of normal-tension glaucoma (NTG) using multifocal visual evoked potentials (mfVEP).

Methods: This observational, cross-sectional study assessed 20 patients with recently diagnosed OSAS with or without NTG. Diagnosis of sleep apnea was based on overnight polysomnography (ApnoeScreen).

[Lung function testing in patients with pulmonary arterial hypertension].

Objective: The main objective was to describe the results of lung function testing in a series of 120 patients with pulmonary arterial hypertension, and the secondary objective was to compare these findings with hemodynamic variables.

Patients And Methods: This was a descriptive study of lung function in 120 patients with stable pulmonary arterial hypertension (Evian/Venice groups 1 and 4) studied until January 2002 in the Pulmonary Hypertension and Lung Transplant Working Group attached to the Cardiology Department of the Hospital Universtario 12 de Octubre in Madrid, Spain. Data were collected retrospectively for the first 47 patients (1981 to 1995) and prospectively thereafter for the remaining 73 patients.