The U.S. FDA’s decision to grant breakthrough device designation for Bivacor Inc.’s titanium total artificial heart (TAH) sent real hearts aflutter at the Huntington, Calif.-based company’s headquarters. While the designation supports use of the TAH as a bridge to transplant for adults with biventricular or univentricular heart failure for whom current options are insufficient or unsuitable, Bivacor hopes its device will eventually serve as a long-term heart replacement.