ELECTROCARDIOGRAPHIC STUDIES DURING ATTACKS OF ANGINA PECTORIS AND OF OTHER PAROXYSMAL PAIN

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Abstract
In 8 of 11 cases during transient attacks of angina pectoris there was inversion of the T wave and (or) inversion of the S-T segment of the curve. In some instances a negative T became more deeply depressed. These changes disappeared after subsidence of the pain. This evidence supports the conception that transient anginal attacks are due to myocardial ischemia, presumably due to alteration in coronary artery flow. Electrocardiograms taken during other types of paroxysmal pain (labor pains, renal and gallstone colic) showed no changes in the T wave or S-T portion of the curves.

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