Assessment of Impella position on supine chest X-ray in the intensive care unit. Introduction and applicability of the Aortic Valve Location Ratio

Dagmar M. Ouweneel, Krischan D. Sjauw, Esther M.A. Wiegerinck, Alexander Hirsh, Jan Baan Jr, Bas A.J.M. de Mol, Wim K. Lagrand, R. Nils Planken, José P.S. Henriques