Dynamic changes of hepatic vein Doppler velocities predict preload responsiveness in mechanically ventilated critically ill patients oleh Mario Bruna, Sebastian Alfaro, Felipe Muñoz, Liliana Cisternas, Cecilia Gonzalez, Rodrigo Conlledo, Rodrigo Ulloa-Morrison, Marcos Huilcaman, Jaime Retamal, Ricardo Castro, Philippe Rola, Adrian Wong, Eduardo R. Argaiz, Roberto Contreras, Glenn Hernandez, Eduardo Kattan