The AbioCor's motor sits between the two ventricles inside a separate chamber filled with silicone fluid.

FORBES: Lonely Heart

This means an electrical pulse can pace both ventricles, resynchronising them.

ECONOMIST: Case history

This is a new feature, available on some defibrillator-like devices that are now on the market, which is aimed at people with a form of heart condition that causes their two ventricles to beat slightly out of phase with each other.

ECONOMIST: Case history