Soft Beats: A Dielectric Elastomer-Based Ventricular Assist Device for Next-Gen Heart Failure Management

Ventricular assist devices (VADs) are vital for patients with severe heart failure but often face limitations in energy efficiency and adaptability. To address these challenges, the dielectric elastomer-based electropneumatic device (DE-EPD) is introduced, a novel cardiac assist device utilizing dielectric elastomers (DEAs) for soft, pulsatile motion. The DE-EPD incorporates a tubular multilayer DEA within a vacuum chamber, optimized with axial prestretch and radial biasing to improve performance while minimizing energy consumption. With a weight of less than 200 g and an energy consumption of only 1.6 W, the DE-EPD achieves a flow rate of 6.8 L min−1, equal to a head pressure of 85 mmHg at 5 Hz, effectively mimicking physiological heart dynamics. Its lightweight and portable design offers significant advantages over conventional motor- and pneumatic-driven VADs. The DE-EPD sets a new standard for the next generation of VADs, offering a sophisticated and effective alternative in heart failure management.