Moderate vs. Severe Heart Disease (IMAGE) University of North Carolina Health Care Caption Left: moderate heart disease with limited arterial blockages in the heart of a pig are shown. Right: this image shows severe disease with several near-total blockages. The two biomarkers were greatly elevated only in severe disease. Credit UNC School of Medicine Usage Restrictions None 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.