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Division of Cardiovascular Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA; Windmill Cardiovascular Systems, Inc., Austin, TX, USA; Division of Cardiology, Department of Internal Medicine, University of Texas Health/McGovern Medical School, Houston, TX, USA Correspondence to: Carlo R. Bartoli, MD, PhD. Hospital of the University of Pennsylvania, Division of Cardiovascular Surgery, 380 South University Ave, Hill Pavilion, Room 410B, Philadelphia, PA 19104, USA. Email: carlo.bartoli@uphs.upenn.edu.

Reinventing the displacement left ventricular assist device in the continuous-flow era: TORVAD, the first toroidal-flow left ventricular assist device