Fibrillation: In cardiology, an abnormal and erratic twitching of the heart muscle. From Healthy Heart Resources Signs Psoriasis May Be Affecting Your HeartDiagnosing Hypertrophic CardiomyopathyExercising With HCM: How to Sweat Safely Featured Centers What Are the Best PsA Treatments for You?Understanding Biologics 10 Things People With Depression Wish You Knew