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Indexed/Abstracted in: BIOSIS Previews, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,632
Online ISSN 1827-191X
Ueshima K., Hashimoto K., Chiba M., Nakamura M., Nasu M., Hiramori K., Kamata J.*, Yagi Y.*, Kawazoe K.*
From the Second Department of Internal Medicine and the *Third Department of Surgery Iwate Medical University, Morioka, Japan
Background. Recently, combined treatment using the Maze procedure for organic heart disease and atrial fibrillation has been reported, but there have been few studies of cardiac rhythm after combined treatment. Predictors of cardiac rhythm after combined surgical treatment have been unknown.
Methods. Thirty patients who underwent cardiac surgery with the Maze procedure were retrospectively enrolled in this study. Two groups consisted of the patients with restoration of sinus rhythm after surgery (SR: n=15, 6 males and 9 females, mean age of 64 years), and the patients with maintenance of atrial fibrillation (AF; n=15, 5 males and 10 females, mean age of 61 years). Before cardiac surgery, all patients underwent exercise testing with measurement of atrial natriuretic peptide (ANP) before and after exercise testing, two-dimensional echocardiography, and right and left heart catheterization.
Results. The mean maximal heart rate and the ANP level after exercise testing in SR were significantly higher than those in AF. The left atrial dimension and right atrial and pulmonary capillary wedge pressures were significantly higher in AF than in SR. These findings indicate that subjects in SR exhibited less impaired atrial function which were evaluated by exercise testing with measurement of ANP, echocardiography, and cardiac catheterization.
Conclusions. The atrial function of patients with sinus rhythm after the Maze procedure may be less impaired than that of patients remaining in atrial fibrillation.