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Titolo:
RADIOFREQUENCY CATHETER ABLATION OF IDIOPATHIC LEFT-VENTRICULAR TACHYCARDIA - FURTHER EVIDENCE FOR MICROREENTRY AS THE UNDERLYING MECHANISM
Autore:
KOTTKAMP H; CHEN X; HINDRICKS G; WILLEMS S; BORGGREFE M; BREITHARDT G;
Indirizzi:
UNIV MUNSTER,MED KLIN & POLIKLIN D-48129 MUNSTER GERMANY HOSP UNIV MUNSTER,DEPT CARDIOL & ANGIOL W-4400 MUNSTER GERMANY INST RES ARTERIOSCLEROSIS MUNSTER GERMANY
Titolo Testata:
Journal of cardiovascular electrophysiology
fascicolo: 3, volume: 5, anno: 1994,
pagine: 268 - 273
SICI:
1045-3873(1994)5:3<268:RCAOIL>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
BUNDLE-BRANCH BLOCK; LEFT AXIS DEVIATION; TRIGGERED ACTIVITY; SLOW CONDUCTION; VERAPAMIL; AUTOMATICITY; TERMINATION; INDUCTION; DISEASE; PATTERN;
Keywords:
IDIOPATHIC LEFT VENTRICULAR TACHYCARDIA; RADIOFREQUENCY CATHETER ABLATION; ENDOCARDIAL MAPPING;
Tipo documento:
Note
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
H. Kottkamp et al., "RADIOFREQUENCY CATHETER ABLATION OF IDIOPATHIC LEFT-VENTRICULAR TACHYCARDIA - FURTHER EVIDENCE FOR MICROREENTRY AS THE UNDERLYING MECHANISM", Journal of cardiovascular electrophysiology, 5(3), 1994, pp. 268-273

Abstract

Idiopathic Left Ventricular Tachycardia. Introduction: Idiopathic left ventricular tachycardia with a QRS pattern of right bundle branch block and left-axis deviation constitutes a rare but electrophysiologically distinct arrhythmia entity. The underlying mechanism of this tachycardia, however, is still a matter of controversy. This report describes findings in a 42-year-old man who underwent successful radiofrequency catheter ablation of idiopathic left ventricular tachycardia. Methods and Results: On electrophysiologic study, the tachycardia was reproducibly induced and terminated with double ventricular extrastimuli. Intravenous verapamil terminated the tachycardia whereas adenosine did not. Detailed left ventricular catheter mapping during sinus rhythm revealed a fragmented delayed potential at the mid-apical region of the inferior site near the posterior fascicle of the left bundle branch. At the same site, continuous electrical activity throughout the entire cardiac cycle was recorded during ventricular tachycardia. Repeated spontaneous termination of this continuous electrical activity in late diastole was followed immediately by termination of the tachycardia. Single application of radiofrequency current for 20 seconds at this sitecompletely abolished inducibility of the tachycardia. After catheter ablation, at the identical site of preablation recording of the fractionated potential during sinus rhythm, no fragmented delayed activity could be recorded. There was no complication from the ablation procedure. Conclusion: The preablation recordings of fragmented delayed potentials during sinus rhythm and continuous diastolic electrical activity during tachycardia, together with ablation characteristics and previously reported electrophysiologic properties of this arrhythmia, may further support microreentry as the underlying mechanism in idiopathic left ventricular tachycardia.

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Documento generato il 23/09/20 alle ore 07:15:40