Clinical electrocardiography . Fig. —Heart, anterior view, slightly from right. to respond to stimuli; (3) conductivity, the power of impulsetransmission; (4) contractility, the power of adapting its shape PHYSIOLOGIC CONSIDERATIONS 19 and length in response to stimuli, and (5) tonicity, the power ofsustained partial contraction in which stretching is resisted. Origin and Course of the Cardiac Impulse.—The sino-auricularnode, a collection of specialized tissue (primordial tube remnant),lies in the sulcus terminalis at the juncture of the superior venacava and the right auricular appendage (
Clinical electrocardiography . Fig. —Heart, anterior view, slightly from right. to respond to stimuli; (3) conductivity, the power of impulsetransmission; (4) contractility, the power of adapting its shape PHYSIOLOGIC CONSIDERATIONS 19 and length in response to stimuli, and (5) tonicity, the power ofsustained partial contraction in which stretching is resisted. Origin and Course of the Cardiac Impulse.—The sino-auricularnode, a collection of specialized tissue (primordial tube remnant),lies in the sulcus terminalis at the juncture of the superior venacava and the right auricular appendage (Fig. 2). It is composedof delicate, spindle-shaped, interlacing muscle-fibers and a fewganglion cells in a connective-tissue reticulum. The sino-auricular.
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Keywords: ., bookcentury1900, bookdecade1920, bookidclinicalelec, bookyear1922
