Keywords atrial fibrillation;structural remodeling;calpain;echocardiography;acoustic quantification technique;pulmonary vein;myocardial sleeve gap;junctional remodeling;connexin;canine;

• 心房颤动;结构重构;钙激活蛋白酶;超声心动图;声学定量技术;肺静脉;肌袖;缝隙连接重构;连接蛋白;犬;