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Methods: ECGs were interpreted blindly in 63 patients with severe COPD (group 1) versus 83 patients with mild or moderate COPD (group 2). Results: Right atrial enlargement (RAE) occurred in 44% of group 1 and 15% of group 2 patients (P http://www.selleck.cn/products/PLX-4720.html and 4% of group 2 patients (P http://www.selleckchem.com/products/a-1331852.html The traditional algorithms do not take the irregular baseline fibrillation of AF into consideration, so their http://www.selleckchem.com/products/avelestat-azd9668.html location accuracy is relatively low. Based on simple assumptions that AF is a random signal while T waves and QRS complexes are deterministic signals, we suggest a novel method to suppress f wave for improving location of T-wave ends during AF. We firstly define a new cardiac cycle and then match R peaks and T peaks in the three adjacent cardiac cycles. Finally, we suppress the interference of the f wave by averaging. When evaluating with the PhysioNet QT database and simulated AF signals in terms of the mean and the standard deviation of the T-wave ends location errors, the proposed algorithm improves the performance of existing popular methods. Besides, the clinical significance of the proposed method is illustrated. ""Background: We describe an unusual finding in an electrocardiogram showing ST-segment elevation not related to coronary artery stenosis, pericarditis, bundle branch block, or other well known disorders. Case Presentation: A 60-year-old African American woman admitted for elective coronary artery bypass graft surgery. A temporary pacemaker with pacing wires was placed intraoperatively for prevention and treatment of postoperative bradyarrhythmia. One day following uneventful surgery, her electrocardiogram demonstrated marked ST segment elevation confined to lead V6.