ECG Library BASICS 340 356
PR Interval

Assessment / interpretation of the EKG PR interval. ECG PR interval is the time from the onset of the P wave to the start of the QRS complex.

ECG Library BASICS 340 356
U Wave

The U wave is a small (0.5 mm) deflection immediately following the T wave, usually in the same direction as the T wave. Best seen leads V2 and V3.