Ramadan, Shimaa Kamal, Fathia Ahmed Elsheshtawy, Timoor Mostafa hassan Abd Allah, and Sameh Samir Khalil. “Assessment of Functional Capacity of Patients With Chronic Heart Failure by the Use of Echocardiography Right Atrial Volume Index”. International journal of health sciences 6, no. S8 (October 5, 2022): 4538–4551. Accessed May 20, 2025. https://sciencescholar.us/journal/index.php/ijhs/article/view/13235.