Document Detail


Left ventricular epicardial outflow tract tachycardia: a new distinct subgroup of outflow tract tachycardia.
MedLine Citation:
PMID:  11502049     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The present study investigated the incidence and ECG characteristics of ventricular tachycardias (VTs) originating from the left ventricular (LV) epicardium. Thirty-one consecutive patients with VT or premature ventricular contraction originating from the outflow tract (OT-VT) underwent catheter ablation. Twenty-one OT-VTs were ablated from the endocardium in the right ventricular (RV) OT and 3 were ablated from the endocardium in the LVOT. In the remaining 7 patients, 4 (13%) OT-VTs were LV epicardial in origin, and 1 of these was ablated from the left sinus of Valsalva. The ECG characteristics of OT-VT of epicardial origin included prominent tall R-waves in the inferior leads, an R-wave in V1 and an S-wave in V2, precordial R-wave transition in V2-4, a deep QS-wave in aVL, and no S-wave in V6. In addition, there was an atypical left bundle branch block morphology with an inferior axis. These findings were observed during pacing from several sites in the LV epicardium. Furthermore, pacing from the left sinus of Valsalva caused a relatively tall R in V1, deep S-wave in V2 and a tall R-wave with a shallow S-wave in V3, as well as tall R-waves in the inferior leads, which represented intermediate characteristics between RV endocardial OT-VT and LV endocardial OT-VT. In conclusion, OT-VT originating from the LV epicardium is not uncommon and has characteristic ECG findings. Some of them can be ablated from the left sinus of Valsalva.
Authors:
H Tada; A Nogami; S Naito; H Fukazawa; Y Horie; S Kubota; Y Okamoto; H Hoshizaki; S Oshima; K Taniguchi
Related Documents :
11196559 - Is all ventricular fibrillation the same? influence of mode of induction on characteris...
8950069 - Programmed ventricular stimulation after myocardial infarction does not help reduce the...
9843469 - Location of diastolic potentials in reentrant circuits causing sustained ventricular ta...
16080639 - Use of amiodarone in emergency.
6746899 - Localized reentry. mechanism of induced sustained ventricular tachycardia in canine mod...
15546309 - Feasibility of catheter cryoablation in normal ventricular myocardium and healed myocar...
19914869 - A single-centre report on the characteristics of tako-tsubo syndrome.
11990669 - Radiofrequency ablation of sustained ventricular tachycardia related to the mitral isth...
1575139 - Effects of intraaortic balloon pumping on mitral flow dynamics in patients with coronar...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Japanese circulation journal     Volume:  65     ISSN:  0047-1828     ISO Abbreviation:  Jpn. Circ. J.     Publication Date:  2001 Aug 
Date Detail:
Created Date:  2001-08-14     Completed Date:  2002-01-17     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7806868     Medline TA:  Jpn Circ J     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  723-30     Citation Subset:  IM    
Affiliation:
Division of Cardiology, Gunma Prefectural Cardiovascular Center, Maebashi, Gunma, Japan.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Catheter Ablation
Electrocardiography*
Electrophysiologic Techniques, Cardiac
Electrophysiology
Female
Humans
Male
Middle Aged
Pericardium
Tachycardia, Ventricular / physiopathology*,  surgery
Ventricular Function, Left

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Prediction of wall motion recovery from the left anterior descending coronary artery velocity patter...
Next Document:  Role of hypertension, dyslipidemia and diabetes mellitus in the development of coronary atherosclero...