Free ECG or EKG arrhythmia tool is a Palm based medical freeware . It features sample strips of 25 different arrhythmias. You can zoom on to the strip to see the EKG details. Also you can review the features of each waveform in a particular arrythmia by clicking on P, PR Interval, QRS Complex , T wave etc.  An easy reference during the rounds until you become an expert in EKG or ECG interpretation. The catch ? They site owners ask for your email address where they will send you the download instructions. 

Here is the link: Fee EKG Tool for Palm OS