The author apologises for the omission of Figure 1 from this article. Please see the figure below, and please note that the citation to this figure should have appeared in the Patients and methods section of the paper as follows:
Figure 1 Modified TandemHeart VAD circuit.
Patients and methods
We modified the TandemHeart Ventricular Assist Device circuit by introducing an oxygenator (Quadrox, Maquet, Rastatt, Germany) on the outflow limb, a hemoconcentrator (Sorin Inc., Arvada, Colorado, United States of America) to the pre-oxygenator tubing and gate clamps in post-oxygenator limb (See Figure 1).
