Circulation 1991 Aug;84(2):871-83.
Detection and localization of prolonged epicardial electrograms with
64-lead body surface signal-averaged electrocardiography.
Freedman RA, Fuller MS, Greenberg GM, Ershler PR, Lux RL, McLaughlin TB, Menlove R, Green LS, Moddrelle D, Krall R,
Department of Internal Medicine, University of Utah Medical Center, Salt
Lake City 84132.