I just finished the first of a series of podcasts on the heart rhythm disorder atrial fibrillation entitled, "So You Have Atrial Fibrillation." (20.3 Meg MP3 file and lasts 17 min 39 sec) It covers some of the basics as an introduction and is borrowed from my Atrial Fibrillation Tutorial. I hope to perform one on catheter ablation of atrial fibrillation soon. Since this is my first attempt, I welcome your feedback.
You can download it here.