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以往多认为房颤时心电图V_1导联f波粗大提示为风心病及相应的左房扩大，而f波细小则考虑为其它心脏疾患。近年来，对f波幅、左房大小及房颤病因
In the past that more when the atrial fibrillation ECG V_1 lead f wave coarse tips for rheumatic heart disease and the corresponding left atrial enlargement, and f-wave small is considered for other heart disease. In recent years, the f amplitude, left atrial size and cause of atrial fibrillation