The electrocardiogram is useful in the diagnosis and management of coronary artery disease. Interest is generally centered on the S-T segment and the T wave, but the QRS complex sometimes shows pronounced changes, and the vectorcardiogram may reveal mild and early alterations in the QRS loop in its various projections. Close inspection of the S-T segment and T wave reveals many subtle changes. These data, properly integrated with all the clinical data, are valuable, but to rely on them alone is to treat the electrocardiogram rather than the patient. Continued study of electrocardiograms in the light of postmortem findings is to be encouraged.
Burch GE. SIGNIFICANCE OF CERTAIN EARLY CHANGES IN THE T WAVE IN CORONARY DISEASE. JAMA. 1957;165(14):1781–1784. doi:10.1001/jama.1957.02980320011004
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