Two good cardiology videos

I don't know why, but YouTube has ceased to present me with pictures of funny pets and has instead begun to recommend cardiology videos. Perhaps it feels I should be more productive online. Some are quite good. Here are two. The first is a really nice visual demonstration of all the various chambers and pumps in the heart. I wish I could show it to patients! [youtube=]

The second is a quick-and-dirty guide to the most common pathologies on EKGs: