Concealed Ventricular Extrasystoles
نویسندگان
چکیده
منابع مشابه
Concealed ventricular extrasystoles.
AN apparently haphazard distribution of ventricular extrasystoles may not be so haphazard as it appears and indeed may mask an underlying regularity. We previously reported a case in which careful analysis uncovered a simple but remarkable phenomenon, namely, that the interectopic intervals always contained an odd number of sinus beats.1 This was explicable on the assumption that a bigeminal rh...
متن کاملConcealed ventricular extrasystoles due to interference and due to exit block.
Two cases of sinus rhythm with ventricular extrasystoles are reported in which extrasystoles arising from the same focus obey the rule of "comcealed bigeminy" and the "rule of bigeminy". In a comparatively rapid sinus rhythm, shortening of the sinus cycle favors the appearance of extrasystoles, and the extrasystoles obey the fule of "concealed bigeminy"; namely, sinus impulses intervene between...
متن کاملReciprocal ventricular extrasystoles.
An impulse originating in the A-V node or ventricles may be conducted retrogradely through the A-V node. The retrograde impulse may, under certain circumstances, return anterogradely through the A-V node to the ventricles giving rise to a reciprocal or return extrasystole. One explanation for this re-entry phenomenon is based on the concept of a functional vertical division or longitudinal diss...
متن کاملThe Localization of Ventricular Extrasystoles *
The interest in localization of the site of origin of ventricular extrasystoles by study of their electrocardiographic configuration does not arise from a sense of the importance of such a localization in the case of the majority of ventricular extrasystoles observed in man. It is, rather, founded on the recognition in the earliest days of electrocardiography'5 26, 27, 28 that the electrocardio...
متن کاملConcealed AV junctional extrasystoles simulating second-degree sinoatrial block.
Concealed AV junctional extrasystoles are described which, conducted in a restrograde manner to the sinoatrial junction, interfere with sinus impulses, thus simulating a second-degree, 2:1, sinoatrial block.
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ژورنال
عنوان ژورنال: Circulation
سال: 1963
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.27.6.1043