EKG Tutorial Websites

I found these two websites that will be helpful for anybody who wants to learn more about identifying heart rhythms.  I'm including a short description and screenshots for both websites.

http://ekgreview.com/

            This website contains a very extensive and thorough discussion of different ECG rhythms.  This website is a good resource for a novice nurse who needs to learn more about identifying different heart rhythms.  This website has some self-paced quizzes that a nurse might use to enhance their learning.