Found a website that is very helpful with EKG's. It allows you to take quizzes to test your knowledge by identifying the proper rhythms. It also has a section where you can listen to the different lung and heart sounds. Since I have heard of a few people getting audio questions, thought this might be helpful for those of us preparing to take our NCLEX.
Here is the link: http://www.practicalclinicalskills.com/
A few weeks ago someone posted another ECG website that I found to be helpful, here is that link: https://acls-algorithms.com/rhythms
Hope this helps someone!