____ are implanted "mechanical hearts" that perform the duties of the dysfunctional ventricle and are generally reserved for patients who have end-stage heart failure and are awaiting transplant.

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Ventricular assist devices (VADs) are implanted mechanical devices that help the heart to pump blood. They are often used in patients with end-stage heart failure who are awaiting a heart transplant or as a long-term treatment for patients who are not eligible for a transplant. Intra-aortic balloon pumps, ventricular pacemakers, and ventricular defibrillators are all different types of cardiac assist devices with other functions.

____ Are Implanted "Mechanical Hearts" That Perform the Duties of the Dysfunctional