Vaso-stimulator

From Memory Alpha, the free Star Trek reference

A vaso-stimulator is a type of 22nd century Vulcan medical device used in stimulating blood vessels.

Kov's father was able to recover from a near fatal illness after surgeons implanted a vaso-stimulator in his body. Kov later learned that according to the doctors, "with any luck, it'll extend his life a few years." (ENT: "Fusion")