The use of advanced diagnostic tools to detect heart disease is the subject of Saturday's Deseret Morning News/Intermountain Healthcare Hotline. Dr. Christopher McGann and Dr. Brent Wilson, both advanced diagnostic cardiologists in LDS Hospital's Cardiac Imaging Center, will take phoned-in questions from 10 a.m. to noon. All calls are confidential. From the Salt Lake area, call 236-6061. Elsewhere, the toll-free number is 1-800-925-8177; the numbers are only operational during hotline hours.