Usmile atme's List: Objective 036: Perform and Interpret Basic Abnormalities on a 12 Lead ECG

Sooby Says: an easy to use website with each subsection on ECGs at the bottom of the page. Includes some videos and all you need to know about ECGs. Too detailed for a fast revision guide though

Sooby Says: a summary table of different ECG abnormalities. I personally find this page busy but could be helpful as a reference page and suummary.

Sooby Says: a thorough guide to doing an ECG including a detailed explanation on why each lead goes where. Many find this background information helpful in order to consolidate knowledge.