Right ventricular free wall longitudinal strain is independently associated with mortality in mechanically ventilated patients with COVID-19. - McErlane, James; McCall, Philip; Willder, Jennifer; Berry, Colin; Shelley, Ben; the COVID-RV investigators; Reece, A.; Kitchen, C.; Gillies, M.; Dabek, V.; Irvine, V.; MacBrayne, J.; et al. (Annals of Intensive Care, 2022)