Midterm clinical experience with microwave surgical ablation of atrial fibrillation

Ann Thorac Surg. 2005 Jun;79(6):2115-8. doi: 10.1016/j.athoracsur.2004.06.104.


Purpose: Multiple energy sources and lesion sets have been described as an alternative to the conventional cut-and-sew Maze procedure for atrial fibrillation (AF). Described are midterm results with microwave (MW) energy and a single left-sided lesion set so that surgeons can evaluate whether this approach may be appropriate for their patients.

Description: Twenty-nine consecutive patients with chronic (86%) or paroxysmal (14%) AF, undergoing surgery for coexisting heart disease, also underwent MW AF ablation by the use of a single lesion set. A single preoperative and postoperative management regimen was used.

Evaluation: One hundred percent electrocardiogram follow-up was obtained. At minimum follow-up of 4 months (mean 315 days), 23 of 28 patients (86%) were in stable sinus rhythm.

Conclusions: The simplified lesion set performed with MW energy compares favorably with the cut-and-sew Maze procedure for patients presenting with AF and coexisting acquired cardiac disease. Connecting lesions to the mitral annulus and right-sided lesions may add potential morbidity without additional efficacy.

Publication types

  • Clinical Trial

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Atrial Fibrillation / surgery*
  • Catheter Ablation / methods*
  • Comorbidity
  • Electrocardiography
  • Female
  • Heart Diseases / surgery
  • Humans
  • Male
  • Microwaves / therapeutic use*
  • Middle Aged
  • Treatment Outcome