HEART-BLOCK IN THE VENTRICULAR WALLS.

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Abstract
Physiologic and clinical studies have emphasized the fact that the two ventricles of the heart ordinarily act as a unit, all parts contracting approximately at one time and with all the force of which they are capable at that moment. Under exceptional circumstances, however, the ventricular contractions may be more or less abnormal, because there is some incoordination either between the two ventricles or between different portions of the ventricular musculature. The following case illustrates several abnormal forms of ventricular contraction which are interesting because they were observed clinically and because some of them, at least, resulted from the action of strophanthin on an irregularly acting heart. The abnormalities will be discussed in the following order: 1, ventricular contractions which produce waves in the jugular pulse, but little or no effect on the apex tracing; 2, the superposition of one systole or partial systole on another; 3,

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