Aboudeif Othman, M. , Sharaf, E. , Ahmed Attia, W. , Hany Moussa, M. and A. El Desouky, M. 2025. Assessment Of Immediate and Short-Term Changes in Left Ventricular Systolic Function After Interventional Patent Ductus Arteriosus (PDA) Closure by Transthoracic Conventional Echocardiography and Tissue Doppler. Journal of Neonatal Surgery. 14, 21S (May 2025), 1291–1296.