A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine . thethird and fourth interspaces, not tmfrequently under normal circumstances,sometimes during increased cardiac action, and in eccentric hypertrophy of the ven-tricles. As the hearts apex is slightly displaced, and the ventricle becomes slightlysmaller during its systole, the empty space is rilled by the yielding soft parts ofthe intercostal space. When the heart is united with the pericardium and thesurrounding connective tissue, which renders systoli
A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine . thethird and fourth interspaces, not tmfrequently under normal circumstances,sometimes during increased cardiac action, and in eccentric hypertrophy of the ven-tricles. As the hearts apex is slightly displaced, and the ventricle becomes slightlysmaller during its systole, the empty space is rilled by the yielding soft parts ofthe intercostal space. When the heart is united with the pericardium and thesurrounding connective tissue, which renders systolic locomotion of the heartimpossible, a falling in of the chest-wall during systole takes the place of thecardiac impulse (Skoda). During the diastole a diastolic cardiac impulse of thecorresponding part of the chest-wall may be said to occur. Changes in the cardiac impulse are best ascertained by taking graphic repre-sentations of the cardiac impulse, and studying the curves so obtained. Thismethod has been largely followed by many clinicians. In all the following curves, , means auricular contraction ; J>, c, ventricular. Fig. 30. Various forms of curves obtained from the cardiac impulse—a, b, Contraction of|^ auricles ? b, c, ventricular systole; d, closure of aortic, and e of pulmonaryvalves; e, f, diastole of ventricle ; P, Q, hypertrophy and dilatation of theleft ventricle; E, stenosis of the aortic orifice; F, mitral insufficiency; G,mitral stenosis; L, nervous palpitation in Baseclows disease; M, case ofso-called hemisystole. THE HEART-SOUNDS. 01 contraction; d, closure of the aortic valves, and e of the pulmonary; c,/, thetime the ventricle is relaxed (Fig. 30.) In curve P (much reduced), taken from a case of marked hypertrophy with,dilatation, the ventricular contraction, 6 c, is usually very great, while the timeoccupied by the contraction is not much increased. P and Q were obtained froma man suffering from marked eccentric hypertrophy of the left ventricle, in
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectphysiology, bookyear1
