Features a sampling of World Wide Web sites related to cardiology for patients and health professionals. Internet addresses given for the American Heart Association; Healthfinder; The Heart; Cardiology Mailing Lists; Cardiovascular Pathology; Pediatric Cardiology and Critical Care; Synapse: Heart Sounds; MedWeb: Cardiology; ACLS Algorithms; Primary Care Teaching Module: Treatment of Hypertension; A Guide to Cardiac Pacemakers.