Assessment of Right Ventricular Function Among Children With Chronic Lung Disease

"Standard 2D echocardiographic evaluation of right ventricle systolic function will be performed as follows:~* Tricuspid annular peak systolic excursion (TAPSE) will be measured by placing M- mode cursor through tricuspid annulus and measuring the amount of longitudinal motion of the annulus at the peak systole in the longitudinal apical 4chamber view, TAPSE \<-2 Z Score is considered abnormal .~* Tricuspid annular peak systolic velocity (TAPSV) by tissue Doppler \<-2 Z Score is considered abnormal.~Through Tissue Doppler Imaging values of right ventricle will be obtained from the apical four -chamber view using a sample volume placed at the lateral corner of the tricuspid annulus. Peak systolic annular velocity (Ś)."