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Physiologically Responsive Design

Blood Flow Based on Activity Level

The SynCardia temporary Total Artificial Heart (TAH-t) is the only approved device that pumps up to 9.5 L/min through each ventricle. The unique partial fill/full eject design of the SynCardia TAH-t allows the patient’s body to regulate blood flow based on activity level.

The Total Artificial Heart is implanted with a blood flow based on the needs of the patient’s body at rest. The two artificial ventricles partially fill and then fully eject the amount of blood returned to the heart by the body.

During exercise, increased muscle and body movement causes more blood to enter the ventricles. The ventricles can fill with up to 30% more blood. There is no need to adjust the heart rate because the body determines the amount of blood the Total Artificial Heart pumps. Diaphrams


Inside each ventricle is a diaphragm responsible for pumping blood. A slight bit of vacuum supplied by the pneumatic driver pulls the diaphragm down to allow blood to enter the ventricle. To fully eject the blood, a precisely calibrated pulse of air pushes the diaphragm to the top of the ventricle.

Source: “The SynCardia CardioWest™ Total Artificial Heart.” Slepian MJ, Smith RG, and Copeland JG. [In] Baughman and Baumgartner eds., Treatment of Advanced Heart Disease, Chapter 26, Taylor and Francis, 2006, p. 473-490.

Reliable Design

The SynCardia temporary Total Artificial Heart (TAH-t) is elegant by design. It has just six moving parts inside the body. Each ventricle has an inflow valve, an outflow valve and a diaphragm that pumps blood. No other long-term cardiac mechanical assist device is more reliable than the SynCardia Total Artificial Heart.

No Internal Electronics

X-Ray of the SynCardia Total Artificial Heart
X-Ray of the SynCardia Total Artificial Heart

Because of its unique design, the Total Artificial Heart doesn’t require sensors, motors or electronics of any type inside the body. There is never a need to re-operate to repair faulty electronics. The only electronics needed are located outside of the body in the pneumatic driver, which powers the Total Artificial Heart and monitors blood flow.

›› SynCardia Companion 2 Hospital Driver
›› SynCardia Freedom® Portable Driver

No Surgical Pocket

The SynCardia TAH-t replaces the same parts as a heart transplant, so it doesn’t require a surgical pocket. The SynCardia Heart fits into the space of the two removed dying ventricles and four heart valves. Other mechanical-assist products often require a surgical pocket to be created inside the body to provide space for these devices.

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