Leads I and aVL, along with two of the chest leads, V5 and V6, are all considered " lateral" leads and they're near the lateral wall of the heart which receives blood from the left circumflex artery.
I、aVL以及V5V6导联,被认为是“侧壁导联”,因为它们靠近心脏的侧壁,这里接受旋支动脉的血液供应。