The 12 lead ECG

The grid on this page shows the small and large squares that an ECG is commonly recorded on.
Note that a small square is 1mm by 1mm and a large square is 5mm by 5mm.

By running the quizzes on this page, you will be fully prepared for reporting an ECG and obtaining full marks in the formative test during the firm at Charing Cross.
It is recommended that you proceed in the following order...

Basic ECG guide
Guide to more rhythms
Guide to axis
Beginners quiz ECG (takes under 20 minutes)
NOBEL PRIZE site game (takes 10 mins)
More quizzes in WebCT Students in Year 3 only will be registered for these quizzes
A set of ECG quizzes with answers

Here is a normal 12 lead ECG with THREE additional rhythm strips at the bottom.

Normal 12-lead ECG

Home pages

School of Medicine intranet

Imperial College London

Please email web queries and comments to: webmaster.umo@imperial.ac.uk
Last updated: January 6, 2009 12:06 PM