A ventricular assist device (VAD) is a mechanical pump that helps a weak or diseased heart circulate blood throughout the body. There are various synonyms for VAD, including artificial heart pump, cardiac assist device, heart support system, and mechanical circulatory support. These devices are often used as a bridge to transplant or as a destination therapy for patients who are not eligible for heart transplant. Other synonyms for VADs may include implantable cardiac assist devices, left ventricular assist devices, and right ventricular assist devices. VADs come in different sizes and types, and they can be tailored to meet the specific needs of each patient.