Predictors of successful weaning : Tissue Doppler Echocardiography versus oxidative stress markers Research Authors SAMIAA HAMDY, helal Fhetta,Hatem Hassan Mohamed Maghrapy,Salma Moktar ,Samir El-Hadidy Tawfek,Seham Mahmaoud,Soheir Mostafa Kasem Research Date Sat, 1 Jan 2022 - 12:00 Research Department Internal Medicine Research Journal Egyptian journal of chest Diseases and tuberculosis Research Member Salma Mokhtar Osman Hassan