Conventional echocardiographic parameters
DECUBITUS
Echocardiography was performed using a Vivid ultrasound machine (GE Healthcare) with a Vivid Iq M4S‐RS Probe (GE Ving‐Med) connected to a 2.5‐ to 3.5‐MHz phased‐array probe. The patients were examined while at rest in the left lateral decubitus posture. According to the recommendations of the European Association of Cardiovascular Imaging,Echocardiographic parameters included left atrial diameter, interventricular septum thickness, LV posterior wall thickness (PWTd) in the end‐diastolic period, which were obtained from 2D‐guided linear measurements. LV end‐diastolic volume (LVEDV), LV end‐systolic volume (LVESV) and LVEF were calculated from Teichholz's formula. Left atrial volume (LAV) was assessed utilizing the biplane method of disks at the average of the apical four‐chamber and two‐chamber. Transmitral Doppler was utilized to obtain the peak early (