Designed for use on a PC or Mac with all modern operating systems, this CD-ROM contains 30 arrhythmias. Each arrhythmia can be played as a moving strip. The demonstration mode shows the arrhythmia moving on a standard ECG grid with the explanation of the arrhythmia shown below the strip. This provides basic instruction about the characteristics of each arrhythmia. The pacemaker site, rhythm, rate, P waves, P-R interval, QRS complex, clinical significance and treatment are all described. A Site-License may be purchased as well as individual CDs.