AHMED, Iftikhar et al. Comparison of Left Ventricular Ejection Fraction in Heart Failure Patients on Echocardiography, Cardiac Magnetic Resonance Imaging and Single Photon Emission Computed Tomography. Pakistan Armed Forces Medical Journal, [S. l.], v. 72, n. SUPPL-3, p. S461–66, 2022. DOI: 10.51253/pafmj.v72iSUPPL-3.9534. Disponível em: https://www.pafmj.org/PAFMJ/article/view/9534.. Acesso em: 21 jun. 2025.