Left atrium circumferential ablation surrounding the pulmonary veins and electrical isolation of left superior vena cava in the treament of paroxysmal atrial fibrillation是什么意思_Left atrium circumferential ablation surrounding the pulmonary veins and electrical isolation of left superior vena cava in the treament of paroxysmal atrial fibrillation在线翻译_英语_读音_用法_例句