Abstract
Current ventricular assist devices are designed to bypass the right ventricle (RV) in order to deliver the necessary cardiac output. Their use has been limited by anatomic placement constraints, hemolysis and thromboembolic complications. We have designed a soft robotic device that cyclically approximates the RV free wall and the interventricular septum (IVS) in synchrony with the native rhythm. The design avoids blood flow through an artificial lumen of the device and uses the RV as a contraction chamber. We investigated the effectiveness of this approach in an acute large animal model of right heart failure (RHF) resulting from pressure overload.
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