Heart Failure Up Close (IMAGE) Cincinnati Children's Hospital Medical Center Caption This microscopic image shows donated fibrotic heart cells from a patient who had heart failure. The cells have an elaborate fibronectin matrix (shown in red) which causes fibrosis and heart damage. In a study published by Circulation, researchers demonstrate a novel therapeutic peptide stops the process and heart fibrosis in mice with heart injury and human heart failure cells. Credit Cincinnati Children's Usage Restrictions Credit Cincinnati Children's License Licensed content 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.