Following on from this post where I mentioned that I always look for reciprocity when interpreting an ECG, I’ve been meaning to link to this post for some time.

ECG Medical Training‘s posts are to the point, and this one highlights aVL as a lead that might be overlooked when contemplating reciprocity for inferior STEMI (which you might not see in lead I) ;

http://www.ecgmedicaltraining.com/importance-of-lead-avl-in-stemi-recognition