Vectorcardiographic Notation

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Abstract
The method of viewing the frontal, sagittal and transverse vectorcardiographic planes is considered from the standpoint of devising a uniform system of measuring angles on these planes. It is pointed out that care must be taken in the selection of oscilloscopic presentations to prevent inconsistency of the signs of the trigonometric functions of such angles. Two groups of oscilloscopic presentations are suggested, either of which permits angles to be measured in a clockwise direction from a reference axis of uniform position on each plane.

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