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(Circulation. 1956;14:48.)
© 1956 American Heart Association, Inc.

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The Use of the Lead-Field Concept in the Development of Leads Satisfactory for Vectorcardiography. I. The Sagittal Lead

ERNEST W. REYNOLDS JR. M.D.¹; JEROME F. CORDES M.D.¹; PARK W. WILLIS III M.D.¹; FRANKLIN D. JOHNSTON M.D.¹

¹ From the department of Internal Medicine, University of Michigan Medical School, Heart Station, University Hospital, Ann Arbor, Mich.

After a brief discussion of the lead field concept and an illustration of its application using a Teledeltos paper model, studies carried out on patients, employing multiple electrode or grid arrangements located over the precordium and the left posterior chest, to obtain the sagittal component of cardiac electromotive forces (e.m.f.'s), are described. On the basis of these observations, a minimum of 15 properly arranged and connected electrodes should be employed in the anterior electrode system but fewer will be needed posteriorly. A scheme, using 63 electrodes mounted in sponge rubber, has been devised to simplify the grid arrangement.