With the help of two sensors, one for each ventricle, inside the fluid chamber, the AbioCor adjusts its own motor.

FORBES: Lonely Heart

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

FORBES: Lonely Heart

If one of these spent shells is in the chamber, racking the slide will, in a single fluid motion, eject the old shell out the side of the gun and push a fresh round into the chamber.

NEWYORKER: A Loaded Gun

Better yet, fluid no longer needs to move from one reaction chamber to the next.

ECONOMIST: Acoustic microfluidics