Arnold Schwarzenegger has become more like his iconic Terminator character after having surgery last week to receive a pacemaker, the 76-year-old actor and former California governor announced ...

What does a pacemaker do? The role of a pacemaker is to keep the heart beating at a determined heart rate, the same as it is in humans, according to Anna McManamey, DVM, DACVIM (Cardiology), an ...