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Title: Concealed his bundle extrasystoles in congenital heart disease. Author: Nasrallah AT, Gillette PC, Mullins CE, Nihill MR, McNamara DG. Journal: Am J Cardiol; 1975 Feb; 35(2):288-92. PubMed ID: 47222. Abstract: His bundle electrograms were recorded in two children with cardiac conduction disturbances. In the surface electrocardiograms of one patient His bundle extrasystoles mimicked atrial nonconducted bigeminal rhythms; in the other, they simulated second degree atrioventricular (A-V) block and conducted junctional extrasystoles. In both instances the conduction disturbance was a result of concealed conduction of the His bundle extrasystole into the A-V junction. We conclude that the surface electrocardiogram is suggestive but not definitive in diagnosing His bundle extrasystoles and that His bundle recordings are indispensable for correct diagnosis and treatment.[Abstract] [Full Text] [Related] [New Search]