Cardiac induction was a medical procedure, usually performed with a cardiostimulator.
In 2368, medical assistant Martinez performed a cardiac induction on Jean-Luc Picard when he nearly died from being cut off from the nucleonic beam of the Kataan probe. (TNG: "The Inner Light")
In 2373, Kes performed cardiac induction on the dying Ilari Tieran, without effect. (VOY: "Warlord")