Electrical Potential

The electrical potential as a function of time is shown at select times during the analysis. The activation times predicted by the model compare well with estimated activation times for normal heart function shown in the figure below.

Electric Potential in the Heart (at 90 ms, 180 ms, 230 ms)—Maximum (Red): 20mV; Minimum (Blue): -80mV

Plot of Normal Activation Times throughout the Heart

The electrocardiogram shows how electrical events in the heart cause a change in voltage between two points on the body surface over the period of the cardiac cycle. The P wave corresponds with atrial depolarization. The PR interval corresponds with the conduction time through the atria and AV node. The QRS complex corresponds with ventricle depolarization. The ST segment corresponds with the interval between ventricular depolarization and repolarization. Finally, the T wave corresponds with ventricular repolarization.