Intraoperative Microwave Ablation in Patients Undergoing Valvular Surgery: Midterm Results

Authors

  • Andrea Venturini
  • Elvio Polesel
  • Valeria Cutaia
  • Angiolino Asta
  • Domenico Mangino
  • Roberto Moretti
  • Alberto Terrini
  • Claudio Zussa

DOI:

https://doi.org/10.1532/hsf.953

Abstract

Aim of the Study: To assess the safety and efficacy of intraoperative microwave ablation to restore sinus rhythm and systolic atrial function in patients undergoing valvular surgery.

Methods: Forty-one patients with atrial fibrillation (AF) underwent operations. The mean age was 61 years (range, 4576 years). AF was permanent in 30 patients and paroxysmal in 11. Associated cardiac procedures were mitral valve repair in 10 patients, mitral valve replacement in 12, and mitro-aortic valve replacement in 19. The microwave procedure (FLEX, AFx inc.) was performed to create an endocardial bilateral encircling isolation of the ostia of the pulmonary veins.

Results: There was no hospital mortality or morbidity. The mean follow-up period was 14.2 months. At follow-up, sinus rhythm was found in 34 patients (82.9%). Echocardiography results at follow-up showed no major or minor left atrial thrombosis and only a mild impairment of the systolic left atrial function.

Conclusion: Intraoperative microwave ablation is a safe and effective treatment to restore sinus rhythm and a mildly impaired left atrial function in patients with AF undergoing cardiac surgery.

References

Cox JL, Jaquiss RDB, Schuessler RB, Boineau JP. 1995. Modification of the maze procedure for atrial flutter and atrial fibrillation, II: surgical technique of the maze III procedure. J Thorac Cardiovasc Surg 110:485-95.nCox JL, Schuessler RB, D'Agostino HJ Jr, et al. 1991. The surgical treatment of atrial fibrillation, III: development of a definitive surgical procedure. J Thorac Cardiovasc Surg 101:569-83.nFeinberg MS, Waggoner AD, Kater KM, Cox JL, Lindsay BD, Perez JE. 1994. Restoration of atrial function after the maze procedure for patients with atrial fibrillation: assessment by Doppler echocardiography. Circulation 90:II-285-92.nFlugelman MY, Hasin Y, Katznelson N, Kriwisky M, Shefer A, Gotsman MS. 1984. Restoration and maintenance of sinus rhythm after mitral valve surgery for mitral stenosis. Am J Cardiol 54:617-9.nHaissaguerre M, Jais P, Shah DC, et al. 1998. Spontaneous initiation of atrial fibrillation by ectopic beats originating in the pulmonary veins. N Engl J Med 339:659-66.nItoh T, Okamoto H, Nimi T, et al. 1995. Left atrial function after Cox's maze operation concomitant with mitral valve operation. Ann Thorac Surg 60:354-60.nChen MC, Guo GB, Chang JP, Yeh K, Fu M. 1998. Radiofrequency and cryoablation of atrial fibrillation in patients undergoing valvular operations. Ann Thorac Surg 65:1666-72.nCox JL, Boineau JP, Schuessler RB, Kater KM, Lappas DG. 1993. Five year experience with the maze procedure for atrial fibrillation. Ann Thorac Surg 56:814-24.nKnaut M, Spitzer FG, Karolyi L, et al. 1999. Intraoperative microwave ablation for curative treatment of atrial fibrillation in open heart surgery: the MICRO-STAF and MICRO-PASS pilot trial. MICROwave Application in Surgical Treatment of Atrial Fibrillation. MICROwave Application for Treatment of Atrial Fibrillation in Bypass-Surgery. Thorac Cardiovasc Surg 47(suppl):379-84.n

Published

2005-02-08

How to Cite

Venturini, A., Polesel, E., Cutaia, V., Asta, A., Mangino, D., Moretti, R., Terrini, A., & Zussa, C. (2005). Intraoperative Microwave Ablation in Patients Undergoing Valvular Surgery: Midterm Results. The Heart Surgery Forum, 6(5), 409-411. https://doi.org/10.1532/hsf.953

Issue

Section

Articles

Most read articles by the same author(s)