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To the Editor:
—In view of the recent recommendations of the special committee of the American Heart Association on chest leads (Standardization of Precordial Leads, J. A. M. A. 110:395 [Jan. 29] 1938; Standardization of Precordial Leads; Supplementary Report, ibid. 110:681 [Feb. 26] 1938), it seems worth while to revise figure 15 and table 6 which accompanied our recent article on the four lead electrocardiogram (Four Lead Electrocardiogram in Cases of Recent Coronary Occlusion, Arch. Int. Med. 61:241 [Feb.] 1938) so that they will conform with the recommendations submitted by this committee for standardizing chest leads.We have been accustomed to taking chest leads at Michael Reese Hospital with the chest electrode in the fourth intercostal space and in the left parasternal line and with the indifferent electrode on the left leg, the connections being arranged so that relative negativity of the precordial electrode causes an upright
Bohning A, Katz LN. FOUR LEAD ELECTROCARDIOGRAM. Arch Intern Med (Chic). 1938;61(3):519–522. doi:https://doi.org/10.1001/archinte.1938.00020030149013
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