Along with the growing utilization of the total artificial heart comes a new set of ethical issues that have, surprisingly, received little attention in the literature: How does one apply the criteria of irreversible cessation of circulatory function given that a TAH rarely stops functioning on its own? Can one appeal to the doctrine of double effect as an ethical rationale for turning off a TAH given that this action directly results in death? And, On what ethical grounds can a (...) physician turn off a TAH in view of the fact that either the intent of such an action or the outcome is always, and necessarily, death? The aim of this article is not to answer these questions but to highlight why these questions must be explored in some depth given the growing use of TAH technology. (shrink)