Non-invasive assessment of the collateral circulation in the hand: validation of the Nexfin system and relation to clinical outcome after transradial catheterisation

Maurits R. Hollander1, MD; Maarten A.H. van Leeuwen1, MD; Dirk J. van der Heijden1, MD; Vincent M.N. Keizer1, MD; Peter M. van de Ven2, PhD; Sander J.J. IJsselmuiden3, MD, PhD; Nicolas M. Van Mieghem4, MD, PhD; Giovanni Amoroso5, MD, PhD; Marco J.P.F. Ritt6, MD, PhD; Paul Knaapen1, MD, PhD; Niels van Royen1*, MD, PhD