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The Annals of Thoracic Surgery, Vol 53, 564-570, Copyright © 1992 by The Society of Thoracic Surgeons

ARTICLES

Surgical therapy of paroxysmal atrial fibrillation with the "corridor" operation

JJ Defauw, GM Guiraudon, NM van Hemel, FE Vermeulen, JH Kingma and JM de Bakker
Department of Cardiothoracic Surgery, St Antonius Hospital, Nieuwegein, The Netherlands.

Patients with paroxysmal atrial fibrillation may be extremely disabled despite medical therapy. Based on recent concepts of atrial fibrillation, a surgical open heart procedure was designed to isolate a "corridor" from the right and the left atrium. The corridor consists of the sinus node area, the atrioventricular nodal junction, and the connecting right atrial mass, small enough to prevent atrial fibrillation. Between 1987 and 1990, 20 patients with severely disabling symptoms due to frequent paroxysmal atrial fibrillation underwent the corridor operation, with permanent success in 16 patients. In 8 patients, left atrium to corridor conduction reappeared shortly after the procedure. Reoperation was performed in these patients without extracorporeal circulation. The site of persistent conduction between the left atrium and the corridor could consistently be localized adjacent to the coronary sinus. Nevertheless, reoperation failed to isolate permanently the corridor in 4 patients. During a mean follow-up of 20 months, atrial fibrillation dominating the ventricles was never observed nor inducible in the corridor in the 16 patients with a successful operation. In all cured patients, sinus node function remained undisturbed. Paroxysmal atrial flutter inside the corridor arose in 1 patient and a paroxysmal focal tachycardia in another. All 16 cured patients experienced a clear improvement in quality of life. Refinement of the surgical technique to obtain persistent isolation between the left atrium and the corridor is needed. These results demonstrate that the concept of the corridor operation is sound and justify its use in the treatment of drug-refractory paroxysmal atrial fibrillation.

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