Basic EKG Tracing

EKG Waves:

-P Wave-atrial depolarization
-QRS Complex-ventricular depolarization
-T Wave-ventricular repolarization
-U Wave-atrial repolarization (often absent)



-Upward deflection of the QRS complex is referred to as a positive deflection
-Downward deflection of the QRS complex is referred to as a negative deflection

Normal PR Interval-0.12-0.2 seconds (3-5 small boxes)

Normal QRS Complex-less than 0.12 seconds (less than 3 small boxes)