Objective To investigate the effect of obstructive sleep apnea syndrome on left ventricular outcome and left ventricular function. Methods The study was conducted in 70 patients with obstructive sleep apnea syndrome,and 45 healthy volunteers in our hospital were examined by color Doppler ultrasonography. The results were compared to analyze their structure,left ventricular systolic function,and left ventricular diastolic function changes. Results The indexes of left ventricle in the healthy group were signi...