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Titolo:
Ventricular parasystolic couplets originating in the pathway between the ventricle and the parasystolic pacemaker: Mechanism of "irregular" parasystole
Autore:
Kinoshita, S; Katoh, T; Mitsuoka, T; Hanai, T; Tsujimura, Y; Sasaki, Y;
Indirizzi:
Hokkaido Womens Univ, Sch Human Serv, Ebetsu, Hokkaido 0698511, Japan Hokkaido Womens Univ Ebetsu Hokkaido Japan 0698511 okkaido 0698511, Japan Katoh Cardiovasc Clin, Ohtsu, Shiga, Japan Katoh Cardiovasc Clin Ohtsu Shiga Japan iovasc Clin, Ohtsu, Shiga, Japan Mitsuoka Cardiovasc Clin, Obihiro, Hokkaido, Japan Mitsuoka Cardiovasc Clin Obihiro Hokkaido Japan Obihiro, Hokkaido, Japan Hokuryou Hosp, Sapporo, Hokkaido, Japan Hokuryou Hosp Sapporo Hokkaido Japan ryou Hosp, Sapporo, Hokkaido, Japan Ohtsu Municipal Hosp, Div Cardiol, Ohtsu, Shiga, Japan Ohtsu Municipal Hosp Ohtsu Shiga Japan Div Cardiol, Ohtsu, Shiga, Japan Ohtsu Municipal Hosp, Cent Lab, Ohtsu, Shiga, Japan Ohtsu Municipal Hosp Ohtsu Shiga Japan sp, Cent Lab, Ohtsu, Shiga, Japan
Titolo Testata:
JOURNAL OF ELECTROCARDIOLOGY
fascicolo: 3, volume: 34, anno: 2001,
pagine: 251 - 260
SICI:
0022-0736(200107)34:3<251:VPCOIT>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENTRANCE BLOCK; LONGITUDINAL DISSOCIATION; MICROREENTRY PATHWAY; SINUS IMPULSES; EXTRA-SYSTOLES; CYCLE LENGTH; DIFFERENTIATION; MODULATION; EXTRASYSTOLES; BIGEMINY;
Keywords:
ventricular parasystole; ventricular couplet; second-degree entrance block; reentry; irregular parasystole;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Kinoshita, S Hokkaido Womens Univ, Sch Human Serv, Bunkyodai 23, Ebetsu, Hokkaido 0698511, Japan Hokkaido Womens Univ Bunkyodai 23 Ebetsu Hokkaido Japan 0698511
Citazione:
S. Kinoshita et al., "Ventricular parasystolic couplets originating in the pathway between the ventricle and the parasystolic pacemaker: Mechanism of "irregular" parasystole", J ELCARDIOL, 34(3), 2001, pp. 251-260

Abstract

This article explains the mechanism of "irregular" parasystole. Two theories have been suggested: "electrotonic modulation" and "type I second degreeentrance block. " This study attempts to clarify the mechanism of irregularparasystole in cases of true ventricular parasystole associated with ventricular parasystolic couplets. Cases associated with ventricular parasystolic couplers were selected from 37 clinical cases of true ventricular parasystole in which one or more pure parasystolic cycles with no intervening nonectopic QRS complexes were found. Of the 37 cases of true ventricular parasystole, ventricular parasystolic couplets were found in 4 cases. In none of the other 33 cases, ventricular parasystolic couplets were found. In all the cases coexisting with ventricular parasystolic couplets, the latter ectopic QRS complex of the couplet failed to reset the parasystolic rhythm. The above findings suggest that the latter ectopic QRS complex of the parasystolic couplet originated not in the parasystolic pacemaker but in the pathwaybetween the ventricle and the parasystolic pacemaker. It seems that when asinus impulse fell late in the parasystolic cycle, it passed through the site of second degree entrance block and that the parasystolic couplers originated from the reentrant pathway between the ventricle and the pacemaker. This strengthens our previous suggestion that the mechanism of irregular parasystole is governed by "type I second degree entrance block" and not by "electrotonic modulation."

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 04:06:55