Determining the cardiac axis from a ECG is an important skill. And it’s one that confused me initially when I first started reading ECGs. It is a topic that still confuses a lot of my students. But David Schaack has created a handy interactive tool to learn this skill. He and Mike Cadogan recently wrote a quick piece over at Life in the Fast Lane. It’s a neat little interactive tool where you can drag the axis around and watch the ECG change. It’s something I’m going to be sharing with my students next semester for sure.