切口在隧道壁边界的外面，隧道壁是由钻机在钻透土地或岩石时挖出的。
The kerf is the outside boundary of the tunnel wall that a boring machine gouges out as it bores through the ground or rock.
结论：电学隔离肺静脉治疗AF是可行的，形成确切的连续透壁肺静脉损伤可简化消融治疗AF的径线。
Conclusion: Pulmonary veins isolation is an feasible treatment for AF. Ablation linear for the treatment of AF can be simplified if continuous and transmural lesion were produced.
梗死是透壁性的即累及心肌的全层。
The infarction is "transmural" in that it extends through the full thickness of the wall.
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