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  • Title: [A case reported of double parasystole-combined atrial and ventricular parasystole- (author's transl)].
    Author: Kubota A, Watanabe K, Tagami M, Yamagata S.
    Journal: Jpn Circ J; 1976 Mar; 40(3):243-4, 251-9. PubMed ID: 1271578.
    Abstract:
    Parasystole is an arrhythmia resulting from simultaneous activity of two independent impulse-forming foci, one of which is protected by the other. Ventricular parasystole which arises from an ectopic focus situated in ventricule is relatively common. On the contrary, supraventricular parasystole which is centered in the atria or atrioventricular junction, is extremely rare. Kaufmann and Rothberger studied first parasystole as an entity, and they reported the first case of atrial parasystole. However, the first correctly mentioned example of atrial parasystole was described by Jervell. In the previous paper, we described one observation on atrial parasystole and discussed on its consisting-mechanism. The occurrence of ventricular parasystole is not a rarity, since it has been estimated to be present once in every 1,200 electrocardiograms taken in a general hospital. In contrast, well-documented cases of atrial parasystole are exceedingly rare, and since the first case of it was reported by Kaufmann and Rothberger, only 25 cases have hitherto been reported. In the present paper is described and discussed a case of the extremely rare combination of atrial and ventricular parasystole with exit block and fusion phenomenon...
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