Ramadan, S. K., Elsheshtawy, F. A., Allah, T. M. hassan A., & Khalil, S. S. (2022). 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(S8), 4538–4551. https://doi.org/10.53730/ijhs.v6nS8.13235