ANDOVER, Mass., Sept. 7, 2021 /PRNewswire/ -- TransMedics Group, Inc. ("TransMedics") (Nasdaq: TMDX), a medical technology company that is transforming organ transplant therapy for patients with end-stage lung, heart, and liver failure, today announced that the U.S. Food and Drug Administration (FDA) has granted premarket approval (PMA) of its OCS Heart System for use with organs from donors after brain death (DBD).