What are the parts of a CRT-D device?

First, there's the heart device itself. It's a teeny tiny computer, housed with its battery in a titanium case about the size of a pocket watch, weighing about 3 ounces.Next, there are insulated wires called leads. These carry information from your heart to the device and deliver electrical impulses to your heart.Finally, there's the programmer, a much bigger computer that stays in your doctor's office next to the old magazines. It's used to program your device and retrieve data so your doctor can keep abreast of what's going on.