Objectives: Since the beginning of cardiac surgery the problem of myocardial injury and its adaption is still unsolved. Myocardial injuries remain a high risk. Myocardial suture is successful under relief by the ECC and use of patches. Other surgical disciplines already use knotless anchor sutures to adapt muscular injuries. With a pig heart wall tension model the ideal bidirectional knotless anchor suture should be established in cardiac surgery.