HeartMate I and HeartMate II
The HeartMate I is implanted alongside the patient's native heart and takes over the pumping ability of the weakened left ventricle.
The device is placed just below the diaphragm in the abdomen. It is attached to the aorta (the main artery that feeds blood into the entire body), leaving natural circulation in place while providing all the energy necessary to propel blood throughout the body. This device is pulsatile, meaning that it simulates the motion of the natural heart. It is approximately four inches in diameter, less than two inches in depth and weighs about two and a half pounds. It can pump up to 10 liters of blood per minute, which restores critical circulation and reverses end-organ dysfunction.
How the HeartMate® I is worn
The system controller and two rechargeable batteries, which provide approximately six hours of mobile patient support, can be worn around the belt or in a shoulder bag. A Power Base Unit (PBU) charges the batteries required for patient support, provides connections for system diagnostics and can provide a direct power connection when desired.
The HeartMate ® II LVAD is a next-generation implantable device intended for a broad range of advanced-stage heart failure patients. HeartMate® II is FDA-approved for both bridge-to-transplantation, and as destination therapy for patients ineligible for transplant.
The device's hydrodynamic bearings are designed to provide long-term support.
Its small size makes this VAD suitable for a wider range of candidates, including smaller patients. HeartMate® II provides blood flow through the circulatory system on a continual basis, and its automatic speed control mode regulates pumping activity based on different levels of cardiac activity.