Methods; new bron C57BL mice donar hearts tissue were transplanted into adult Balb/c mice on ears.

• 方法：将C57BL/6J新生乳鼠的半心移植到Balb/c成年小鼠耳后皮肤夹囊内，记录移植心肌电位的变化作为判别心肌存活的指标。