Neozap.com - About ECG s

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Put simply, ECGs are Electrocardiograms - recorded using a device that measures the electrical impulses of the heart. Some heart conditions can be partially diagnosed through the ECG, but mainly - they're cool.

A typical trace looks like this:

ecgtrace

(Image taken from R. Klabunde's site www.cvphysiology.com)

The P wave is associated with the depolarisation of the atria, the QRS complex is associated with the depolarisation of the ventricles and the T wave is associated with the repolarisation of the ventricles.

These resources have a lot more detail (click to navigate to the page):

Use google to find more about ECG's:

http://www.betterhealth.vic.gov.au

http://www.cvphysiology.com

http://en.wikipedia.org/