Evaluation of Segmental Left Ventricular Dysfunction and Intraventricular Dyssynchrony after Pulmonary Vein Isolation in Patients with Chronic Atrial Fibrillation Using 2D Speckle Tracking Echocardiography
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概要
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<B>Introduction:</B> Effect of pulmonary vein isolation (PVI) on left ventricular (LV) function was unclear in patients with chronic atrial fibrillation (CAF). The aim was to evaluate segmental LV function and intraventricular dyssynchrony using speckle tracking imaging after PVI in patients with CAF. <B>Methods:</B> Thirty three patients with CAF could be restored to sinus rhythm by PVI under CARTO-merge guidance and be maintained sinus rhythm after PVI. Echocardiography was performed before and 4.1±2.1 months after PVI. The measurements from conventional echocardiography and speckle tracking imaging were analyzed. Radial strain (RS) was calculated for each 6 standard segmental LV region in left midventricular short axis images respectively. Time difference (TD) in peak anterior wall-to-posterior wall strain was also calculated. <B>Results:</B> In all segment (anteroseptal, anterior, lateral, posterior, inferior, and septal region), RS revealed a significant increase after PVI respectively (P<0.001). As a conventional parameter, ejection fraction was 60.2±10.7% before PVI and 67.1±8.8% after PVI. There was significant improvement (P<0.01). TD was 58.1±43.9 ms before PVI and 31.2±28.8 ms after PVI. There was significant improvement after PVI (P<0.001). <B>Conclusion:</B> Speckle tracking imaging quantified LV segmental systolic function. LV function and intraventricular dyssynchrony could be improved by PVI significantly.
著者
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Nishio Satoru
Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine
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Ishikawa Yukako
Division Of Cardiology Department Of Internal Medicine Yokohama Sakae Kyosai Hospital Federation Of
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Soejima Kyoko
Division Of Cardiology
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Takano Makoto
Division Of Biophysics Department Of Physiology Jichii Medical School
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Matsuda Hisao
Division Of Cardiology Department Of Internal Medicine St. Marianna University School Of Medicine
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Harada Tomoo
Division Of Cardiology Department Of Internal Medicine St. Marianna University School Of Medicine
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Nishio Satoru
Division Of Cardiology St. Marianna University School Of Medicine
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Miyake Fumihiko
Division Of Cardiology Department Of Internal Medicine St Marianna University School Of Medicine
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Matsuda Hisao
Division of Cardiology, Kawasaki Municipal Tama Hospital
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Soejima Kyoko
Division of Cardiology, Kawasaki Municipal Tama Hospital
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Ishikawa Yukako
Division of Cardiology, Kawasaki Municipal Tama Hospital
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