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(Circulation. 1956;14:859.)
© 1956 American Heart Association, Inc.

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Morphologic Aspects of the Negativity of the U Wave and their Corresponding Electrocardiographic and Clinical Data

D. FURBETTA M.D.¹; F. SANTUCCI M.D.¹; A. BUFALARI M.D.¹; P. SOLINAS M.D.¹

¹ From the Cardiological Center of the Institute of Clinical Medicine (directed by Prof. G. Dominici), Perugia University Medical School, Perugia, Italy.

The negative U wave has been studied in 200 electrocardiograms. Six different types of negativity of the U wave are recognized; a seventh type includes the alterations of the T-U segment. Electrocardiographic and clinical data are correlated with these changes. Two hypotheses to explain the varying morphology of the negative U wave are discussed.