computerassisted education system for arrhythmia caesar a computerassisted education system for arrhythmia caesar was developed for students to acquire the ability to logically diagnose complicated arrhythmias this system has a logical simulator of cardiac rhythm using a mathematical model of the impulse formation and conduction system of the heart a simulated arrhythmia ecg pattern is given on a graphic display unit with simulated series of the action potential of five pacemaker centers and the ladder diagram of impulse formation and conduction which show the mechanism of that arrhythmia for the purpose of the evaluation of this system 13 medical students were given two types of tests concerning arrhythmias before and after 2hr learning with this system the scores they obtained after learning increased significantly from 733 119 to 932 30 p less than 0001 in one test and from 472 179 to 649 196 p less than 0001 in another one these results proved that this cai system is useful and effective for training ecg interpretation of arrhythmias