نبذة مختصرة : Aim: Obstructive sleep apnea (OSA) may influence the cardiac function by several mechanisms. The aim of the present study was to evaluate the impact of OSA on left and right cardiac function and determine the echocardiographic parameters which can help to predict the severity of OSA. Methods: In this cross-sectional analysis, 60 patients with suspected OSA were evaluated with transthoracic echocardiography before polysomnography between January and June 2017. On the basis of apnea-hypopnea index (AHI), the patients were classified into non-severe (AHI
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