Zeid, Dina, Walid Ahmed, Randa Soliman, Abdou Alazab, and Ahmed Samir Elsawy. 2021. “Ultrasound-Guided Preload Indices During Different Weaning Protocols of Mechanically Ventilated Patients and Its Impact on Weaning Induced Cardiac Dysfunction”. Open Access Macedonian Journal of Medical Sciences 9 (B):1370-80. https://doi.org/10.3889/oamjms.2021.7026.