Abstract
Summary
The authors described an experimental method of measuring the D. C. and very low frequency components of the electrocardiograms, (relative T-Q and S-T segment shifts) using a commercially available clinical model of electrocardiograph and laboratory type calomel electrodes. Several experimental trials included observation of changes in D. C. and very low frequency components of epicardial electrocardiograms under the influence of electrolytes and local ischemia and served primarily the purpose of testing out the sensitivity of the method. The observations served as a basis for discussion of usefulness of this type of ECG analysis for further theoretical studies on the electrical field of the heart and its applicability for more precise clinical diagnosis of the anatomical state of the heart. The problem of recording equipment and nonpolarizing electrodes was discussed briefly.
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