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  2. Palavra-chave: radiofrequency catheter ablation
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Original Article

Treatment of atrial fibrillation with radiofrequency ablation and simultaneous multipolar mapping of the pulmonary veins

Almino C. Rocha Neto et al. Roberto Lima Farias Angelo A. V. de Paola

OBJECTIVE: To demonstrate the feasibility and safety of simultaneous catheterization and mapping of the 4 pulmonary veins for ablation of atrial fibrillation. METHODS: Ten patients, 8 with paroxysmal atrial fibrillation and 2 with persistent atrial fibrillation, refractory to at least 2 antiarrhythmic drugs and without structural cardiopathy, were consecutively studied. Through the transseptal insertion of 2 long sheaths, 4 pulmonary veins were simultaneously catheterized with octapolar microcatheters. After identification of arrhythmogenic foci radiofrequency was applied under angiographic or ultrasonographic control. RESULTS: During 17 procedures, 40 pulmonary veins were mapped, 16 of which had local ectopic activity, related or not with the triggering of atrial fibrillation paroxysms. At the end of each procedure, suppression of arrhythmias was obtained in 8 patients, and elimination of pulmonary vein potentials was accomplished in 4. During the clinical follow-up of 9.6±3 months, 7 patients remained in sinus rhythm, 5 of whom were using antiarrhythmic drugs that had previously been ineffective. None of the patients had pulmonary hypertension or evidence of stenosis in the pulmonary veins. CONCLUSION: Selective and simultaneous catheterization of the 4 pulmonary veins with microcatheters for simultaneous recording of their electrical activity is a feasible and safe procedure that may help ablation of atrial fibrillation.

  • Atrial Fibrillation
  • pulmonary veins
  • radiofrequency catheter ablation
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Creative Commons Attribution (CC BY) Creative Commons license
31/01/2007 DOI: 10.1590/S0066-782X2001001100003 Visualizações 1
ABC
Original Article

Useful clinical features for the selection of ideal patients with strial fibrillation for mapping and catheter ablation

Niraj Mehta et al. Maria Zildany Pinheiro Távora Noriaki Takeschita Edilberto Figueiredo … Ricardo M. Lourenço Hélio Germiniani Dalton Précoma

OBJECTIVE: To identify useful clinical characteristics for selecting patients eligible for mapping and ablation of atrial fibrillation. METHODS: We studied 9 patients with atrial fibrillation, without structural heart disease, associated with: 1) antiarrhythmic drugs, 2) symptoms of low cardiac output, and 3) intention to treat. Seven patients had paroxysmal atrial fibrillation and 2 had recurrent atrial fibrillation. RESULTS: In the 6 patients who underwent mapping (all had paroxysmal atrial fibrillation), catheter ablation was successfully carried out in superior pulmonary veins in 5 patients (the first 3 in the left superior pulmonary vein and the last 2 in the right superior pulmonary vein). One patient experienced a recurrence of atrial fibrillation after 10 days. We observed that patients who had short episodes of atrial fibrillation on 24-hour Holter monitoring before the procedure were those in whom mapping the focus of tachycardia was possible. Tachycardia was successfully suppressed in 4 of 6 patients. The cause of failure was due to the impossibility of maintaining sinus rhythm long enough for efficient mapping. CONCLUSION: Patients experiencing short episodes of atrial fibrillation during 24-hour Holter monitoring were the most eligible for mapping and ablation, with a final success rate of 66%, versus the global success rate of 44%. Patients with persistent atrial fibrillation were not good candidates for focal ablation.

  • Atrial Fibrillation
  • mapping
  • radiofrequency catheter ablation
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Creative Commons Attribution (CC BY) Creative Commons license
19/02/2002 DOI: 10.1590/S0066-782X2002000100001 Visualizações 1

Como citar este artigo

EndNote RIS

Formato de Documento Eletrônico (Vancouver)

Rocha Neto AC, Farias RL, Paola AAV. Treatment of atrial fibrillation with radiofrequency ablation and simultaneous multipolar mapping of the pulmonary veins. Arquivos Brasileiros de Cardiologia 2007;77(5):418-2.

Formato de Documento Eletrônico (ABNT)

Rocha Neto, Almino C.; Farias, Roberto Lima; Paola, Angelo A. V. de. Treatment of atrial fibrillation with radiofrequency ablation and simultaneous multipolar mapping of the pulmonary veins. Arquivos Brasileiros de Cardiologia, v. 77, n. 5, p. 418-428, jan. 2007.

Formato de Documento Eletrônico (APA)

Rocha Neto, A. C., Farias, R. L., & Paola, A. A. V. (2007). Treatment of atrial fibrillation with radiofrequency ablation and simultaneous multipolar mapping of the pulmonary veins. Arquivos Brasileiros de Cardiologia, 77(5), 418-428.

Formato de Documento Eletrônico (ISO)

Rocha Neto, Almino C. and Farias, Roberto Lima and Paola, Angelo A. V. de. Treatment of atrial fibrillation with radiofrequency ablation and simultaneous multipolar mapping of the pulmonary veins. Arquivos Brasileiros de Cardiologia [online]. 2007, vol. 77, n. 5, [citado 2026-10-14], pp. 418-428. Disponível em: <https://journals.cardiol.br/article/treatment-of-atrial-fibrillation-with-radiofrequency-ablation-and-simultaneous-multipolar-mapping-of-the-pulmonary-veins-2/>. ISSN 0066-782X

EndNote RIS

Formato de Documento Eletrônico (Vancouver)

Mehta N, Távora MZP, Takeschita N, Figueiredo E, Lourenço RM, Germiniani H, Précoma D, et al. Useful clinical features for the selection of ideal patients with strial fibrillation for mapping and catheter ablation. Arquivos Brasileiros de Cardiologia 2002;78(1):9-16.

Formato de Documento Eletrônico (ABNT)

Mehta, Niraj; Távora, Maria Zildany Pinheiro; Takeschita, Noriaki; Figueiredo, Edilberto; Lourenço, Ricardo M.; Germiniani, Hélio; Précoma, Dalton. Useful clinical features for the selection of ideal patients with strial fibrillation for mapping and catheter ablation. Arquivos Brasileiros de Cardiologia, v. 78, n. 1, p. 9-16, fev. 2002.

Formato de Documento Eletrônico (APA)

Mehta, N., Távora, M. Z. P., Takeschita, N., Figueiredo, E., Lourenço, R. M., Germiniani, H., & Précoma, D. (2002). Useful clinical features for the selection of ideal patients with strial fibrillation for mapping and catheter ablation. Arquivos Brasileiros de Cardiologia, 78(1), 9-16.

Formato de Documento Eletrônico (ISO)

Mehta, Niraj and Távora, Maria Zildany Pinheiro and Takeschita, Noriaki and Figueiredo, Edilberto and Lourenço, Ricardo M. and Germiniani, Hélio and Précoma, Dalton. Useful clinical features for the selection of ideal patients with strial fibrillation for mapping and catheter ablation. Arquivos Brasileiros de Cardiologia [online]. 2002, vol. 78, n. 1, [citado 2026-10-14], pp. 9-16. Disponível em: <https://journals.cardiol.br/article/useful-clinical-features-for-the-selection-of-ideal-patients-with-strial-fibrillation-for-mapping-and-catheter-ablation-2/>. ISSN 0066-782X

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