Validation of noninvasive measurement of cardiac output using inert gas rebreathing in a cohort of patients with heart failure and reduced ejection fraction clinical perspective - Hassan, M; Wagdy, K; Kharabish, A; Selwanos, P P; Nabil, A; Elguindy, A; ElFaramawy, A; Elmahdy, M F; Mahmoud, H; Yacoub, M H (Circ Hear Fail, 2017)