Contractile Strength of Cardiac Tissue Derived from Healthy vs. Barth Syndome Patients (video) Harvard University Share Print E-Mail Loading video... Caption The difference in contractile strength of engineered cardiac tissues derived from a healthy patient and a patient with Barth syndrome using the "heart-on-a -chip" approach. Healthy tissues generate significantly more contractile stress with each contraction compared to diseased tissues, some of which do not move at all. Credit Megan McCain and Kevin Kit Parker/Wyss Institute Usage Restrictions Video may be used with appropriate credit Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.