. Special pathology and therapeutics of the diseases of domestic animals. Veterinary medicine. X060 Intermittent Heart Action. of the chest can be felt even during the pause (Fig. 184). The heart beat following upon the pause is usually stronger, while the subsequent beats are either normal in force, or evenly- weakened, or then gradually diminish in intensity. The pulse behaves similarly to the heart beat (true arhythmia of Caroni and Oadiot). During motion the number of heart beats is in- creased, the abnormal rhythm being usually preserved, although sometimes it changes in the same animal f
. Special pathology and therapeutics of the diseases of domestic animals. Veterinary medicine. X060 Intermittent Heart Action. of the chest can be felt even during the pause (Fig. 184). The heart beat following upon the pause is usually stronger, while the subsequent beats are either normal in force, or evenly- weakened, or then gradually diminish in intensity. The pulse behaves similarly to the heart beat (true arhythmia of Caroni and Oadiot). During motion the number of heart beats is in- creased, the abnormal rhythm being usually preserved, although sometimes it changes in the same animal from time to time, so that the pauses occur at shorter, and again at longer intervals. Extrasystolic arhythmia is recognized by the rapid suc- cession of two or several heart beats, which are separated from the other, normal, heart beats by a pause, so that bigeminous, trigeminous, etc., heart beats are noted. The pulse beat cor- responding with the additional systole is usually absent; only when this systole is separated from the preceding one by a longer interval, or if it occurs frequently a rather feeble pulse may be felt (Fig. 185). During motion the arhythmia becomes. rig. 185, Arhythmia of the heart due to additional systole, in a dog with cardiac dilatation and inability to close the bicuspid valve, c Curve of heart beats. Sphygmograph of the Art. femoralis, Z time in 1/5 seconds; s normal ventricular systole, the pulse is distinctly felt; (s) in the sphygmograph; s' additional systole, to which at + in the sphygmograph not a beat corresponds, but at s' a minimal rise; s'-s" crowded additional systoles, to which in sphygmograph elevations cor- respond which are in part minimal, are hardly or not at all to be felt. still more striking, or if it had not been observed at rest it then becomes manifest. It may often be relieved temporarily by cardiotonics. Course. If the intermission of the heart action occurs in the course of an acute disease, it disappears togethe
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