Cardiac Sarcoidosis By L Brent Mitchell, MD, Libin Cardiovascular Institute of Alberta, University of Calgary Reviewed / Revised Jan 2023 View Patient Education Diagnosis Treatment Key Points Sarcoidosis is a multisystem, chronic inflammatory / granulomatous disorder that often affects the heart, causing conduction disturbances, bradyarrhythmias, tachyarrhythmias, and sometimes cardiomyopathy.