Phthalates and Cardiac Electrophysiology (IMAGE) Children's National Hospital Caption New preclinical research finds acute exposure to MEHP, a common plasticizer used in medical equipment, increases risk for alternans and arrhythmias, disruptions in heart rhythm. The images above show changes in heart rhythm, measured by slowed epicardial conduction velocity, enhanced action potential prolongation and impaired sinus node activity. Credit <em>Circulation: Arrhythmia and Electrophysiology</em>, Plasticizer Interaction with the Heart, Volume: 12, Issue: 7, DOI: (10.1161/CIRCEP.119.007294) Usage Restrictions Dr. Posnack and the research team created this image for <em>Circulation: Arrhythmia and Electrophysiology</em> 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.