Surgery Illustration (IMAGE) Imperial College London Caption Clinicians attempt to destroy the local sources of chronic atrial fibrillation by burning the heart from the inside. However, with multiple sources positioned at various depths in the heart wall, such an approach may be ineffective and unnecessarily harm the patient. Credit Madalena Sas 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.