Abrupt Loss of Constant Fusion during Entrainment of Ventricular Tachycardia at a Critical Paced Cycle Length.
نویسندگان
چکیده
منابع مشابه
Procainamide-induced changes in reentrant ventricular tachycardia with special reference to the tachycardia-interrupting critical paced cycle length during transient entrainment with rapid pacing.
With rapid ventricular pacing, sustained ventricular tachycardia (VT) is often entrained and interrupted at a critical paced cycle length. In this paper, the possible mechanism and determinant of the critical cycle length interrupting VT are addressed. Sixteen consecutive patients underwent rapid ventricular pacing in 18 morphologically distinct sustained VTs before and after procainamide. The ...
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Entrainment mapping of ischemic ventricular tachycardia at a site in the left ventricle where radiofrequency ablation was successful in terminating the tachycardia revealed a post-pacing interval shorter than the tachycardia cycle length. The reason for the same is explained in the current report.
متن کاملPredicting ventricular tachycardia cycle length after procainamide by assessing cycle length-dependent changes in paced QRS duration.
To determine if paced cycle length-dependent changes in the QRS duration correlate with the change in ventricular tachycardia (VT) cycle length after procainamide, we measured the QRS duration during sinus rhythm and during right ventricular pacing before and after procainamide (mean concentration, 9.9 micrograms/ml) in 18 patients with morphologically identical VT induced at both study periods...
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BACKGROUND The central common pathway, which is the target for ablation in reentrant ventricular tachycardia, can be localized by entrainment mapping techniques. However, localization of the pathway is not always possible because of the elevated pacing threshold and the low voltage and fractionated potentials at the pathway. We examined whether return cycle mapping after entrainment localizes t...
متن کاملEntrainment of ventricular tachycardia: explanation for surface electrocardiographic phenomena by analysis of electrograms recorded within the tachycardia circuit.
Transient entrainment was demonstrated during 59 pacing events in 18 episodes of sustained uniform ventricular tachycardia (VT) while recording electrograms from the site of origin of tachycardia (LE-SOO). During entrainment, the morphology of the initial component of the LE-SOO was identical to the morphology observed during the tachycardia in 13 VTs (group I), but in five VTs (group II), the ...
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ژورنال
عنوان ژورنال: Japanese Heart Journal
سال: 2001
ISSN: 0021-4868,1348-673X
DOI: 10.1536/jhj.42.67