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(Circulation. 1951;3:182.)
© 1951 American Heart Association, Inc.

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Spatial Vector Electrocardiography

The Clinical Characteristics of S-T and T Vectors

ROBERT P. GRANT M.D.¹; E. HARVEY ESTES JR. M.D.¹; JOSEPH T. DOYLE M.D.¹

¹ From the Departments of Medicine and Physiology, Emory University Medical School and the Grady Memorial Hospital, Atlanta, Georgia.

The application of a spatial vector method of interpretation to the S-T and T deflections in the conventional electrocardiogram is described, and the vector abnormalities responsible for the more commonly encountered deformities are discussed. In addition, the isolated T-negativity syndrome is described, a rare type of precordial T-wave inversion which may be encountered in normal subjects and is often indistinguishable from the ST-T deformity of recent myocardial infarction. The spatial vector method of interpretation is found to provide a simple yet rational basis for the interpretation of these often bizarre wave forms.

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