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Ann Thorac Surg 2002;74:249-251
© 2002 The Society of Thoracic Surgeons

Case report

Coexistence of sinus rhythm and segmental atrial fibrillation after maze procedure

Yasushi Matsumoto, MD*a, Go Watanabe, MDb, Masamitsu Endo, MDa, Hisao Sasaki, MDa, Fuminori Kasashima, MDa

a Department of Cardiovascular Surgery, National Kanazawa Hospital, Kanazawa, Japan
b Department of Surgery I, Kanazawa University School of Medicine, Kanazawa, Japan

Accepted for publication October 20, 2001.

* Address reprint requests to Dr Matsumoto, Department of Cardiovascular Surgery, National Kanazawa Hospital, 1-1 Shimoishibikicho, Kanazawa 920-8650, Japan
e-mail: matumoto{at}kinbyou.hosp.go.jp

We present the case of an 80-year-old man with chronic atrial fibrillation associated with mitral regurgitation. The atrial fibrillation was successfully treated with the maze procedure combined with mitral valve replacement. The electrophysiological data are also reported. Recordings of sinus rhythm and intraatrial activity demonstrated the coexistence of sinus rhythm and fibrillation of both atria. This finding indicates that the sinus node was protected from segmental atrial fibrillation by entrance block, and this, in turn, is evidence of the efficacy of the maze procedure.






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Copyright © 2002 by The Society of Thoracic Surgeons.