NDLI: Radiofrequency catheter ablation of premature ventricular contractions originating in the right ventricular outflow tract

Content Provider	Scientific Electronic Library Online (SciELO)
Author	Darrieux, Francisco C. C. Scanavacca, Maurício I. Hachul, Denise T. Melo, Sissy L. D'Ávilla, André B. Gruppi, César J. Moffa, Paulo J. Sosa, Eduardo A.
Abstract	OBJECTIVES: To evaluate if radiofrequency catheter ablation is an effective procedure for the treatment of right ventricular outflow tract premature ventricular contractions (RVOT-PVC) and ascertain if it results in an improvement of symptoms. METHODS: A prospective study with 30 consecutive patients (mean age 40 ± 13 years, 25 females), with no apparent structural cardiopathy, with very frequent (mean density of 1,263 ± 593/h) RVOT-PVC, symptomatic for more than one year (mean = 74 months) and resistant to antiarrhythmic drugs (3 ± 1.7, including beta-blockers), who underwent radiofrequency catheter ablation. RESULTS: After the first procedure, there were 23 initial successful cases (76.6%) and 7 initial failures (23.4%). Four patients experienced relapses, two of whom did not undergo the second procedure. The second procedure was carried out in 9 patients (7 initial failures and 2 relapses), and there was success in 5 additional patients, one of them by epicardial access. The final success rate was 80% (24/30), and there were no major complications. After a mean follow-up of 14 ± 6 months, in the successful group there was a reduction greater than 90% in density of premature ventricular contractions (PVC) (24/24; p<0.0001) and a resulting absence of symptoms in the majority of patients (23/24; p<0.001). CONCLUSION: Radiofrequency catheter ablation is a safe and effective treatment for patients with persistent and symptomatic PVC with RVOT morphology.
Related Links	http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0066-782X2007000300003&lng=en&nrm=iso http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0066-782X2007000300003&lng=en&nrm=iso
Starting Page	265
Ending Page	272
Page Count	8
File Format	PDF
ISSN	00667820
DOI	10.1590/S0066-782X2007000300003
Journal	Arquivos Brasileiros de Cardiologia
Issue Number	3
Volume Number	88
Language	English Portuguese
Publisher	Sociedade Brasileira de Cardiologia - SBC
Publisher Date	2007-03-01
Publisher Institution	USP FM Hospital das Clínicas
Access Restriction	Open
Subject Keyword	Catheter ablation Premature ventricular contractions Arrhythmia Heart ventricles Ablação elétrica por cateter Complexos ventriculares prematuros Arritmia Ventrículos cardíacos
Alternative Title	Ablação com radiofreqüência de extra-sístoles da via de saída do ventrículo direito
Content Type	Text
Resource Type	Article

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