Heart arrhythmias are the topic of today's Deseret Morning News/Intermountain Health Care Hotline. From 10 a.m. to noon, a pair of cardiologists, Dr. J. Peter Weiss and Dr. John D. Day, both of the LDS Hospital Utah Heart Clinic Arrythmia Service, will take phoned-in questions. The toll-free number is 1-800-925-8177.