Date of download: 11/1/2017 Copyright © ASME. All rights reserved. From: Cardiac Assist With a Twist: Apical Torsion as a Means to Improve Failing Heart Function J Biomech Eng. 2011;133(10):101003-101003-10. doi:10.1115/1.4005169 Figure Legend: Top: Computer-controlled rotary servomotor used to drive a custom apical torsion suction device. The “SmartMotor” actuator can be programmed to turn through any angle with velocities, accelerations, and dwell times set by the user. Coordination of rotations with cardiac systole is accomplished by triggering off the ECG directly or via an external pacing signal. Bottom left: Top view of the suction cup apparatus (apical interface device) used to grip the apex of the heart. Bottom right: Side view of the device showing the housing profile, vacuum line, and pressure tubing used to connect to the motor drive shaft.