This is a rhythm strip from a 54 year old patient who had had a surgical correction for Tetralogy of Fallot and who was taking Sotalol for palpitations. He was well with the exception of palpitations which could never be recorded with an EKG machine or a Holter monitor. The patient was given a continuous loop monitor for several weeks. This is a segment of a tracings recorded by the patient when he had his palpitations. An EKG taken with the patient on Corgard and Digoxin.