LVEDD: Left ventricular end diastolic diameter. LVESD: Left ventricular end systolic diameter. dSWT: Septal wall thickness in diastole. dPWT: posterior wall thickness in diastole. EF: Ejection fraction. AoR: Aortic root. LA: Left atrium.

There was a significant positive correlation between each of the measurements in the prone and the supine positions, as shown inTable 2 . LVEDD and LVESD showed the strongest correlation between their measurements in the prone and the supine positions (r = 0.732 and 0.728 respectively, P < 0.001 for both), as shown infigures 3 and 4 , while EF and AoR dimensions showed the lowest correlation (r = 0.386 and 0.382 respectively).