ABRAHAM LIEBERSON, M.D.; FRANK LIBERSON, M.D.
From the very nature of the cardiac action current, it is evident that the number of leads which can be used to conduct the current from selected skin zones to the string galvanometer is legion. It was inevitable that in cases where the three conventional leads failed to furnish enough information about the condition of the heart muscle, some other one, taken in another plane, would be tried in the hope that it might supply the needed data. Thus Waller1 (1887) placed his electrodes all over the body, and in all the natural orifices, searching for "significant" leads. Lewis2 (1909)
LIEBERSON A, LIBERSON F. The Value of the Posterior-Anterior Chest Lead in Cardiac Diagnosis12. Ann Intern Med. ;6:1315–1321. doi: 10.7326/0003-4819-6-10-1315
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Published: Ann Intern Med. 1933;6(10):1315-1321.
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