Instructor Erin Butler RN EKG Interpretation Instructor Erin Butler RN

Normal EKG Parameters P-Wave <.12 sec. = represents depolarization of atria-preparation for contraction. PR Interval .12 - .20 sec = time for impulse to spread from atria to ventricles. QRS Complex 0.04 - 0.11sec = depolarization of the ventricles. QT Interval up to 0.43sec = electrical systole

Normal EKG Parameters T Wave <5mm in amplitude = repolarization of ventricles. U Wave = sometimes follows T wave, may indicate hypokalemia.

EKG Interpretation Each small box is 0.1 mV 5x5 small boxes are 0.5mV

Normal Sinus Rhythm

Sinus Bardycardia

Sinus Tachycardia

Atrial Fibrillation

Atrial Flutter

Multifocal PVC’s (Premature Ventricular Contractions)

Paced Rhythm

1st Degree AV Block

Second Degree AV Block Type 1

2nd Degree AV Block Type 2

3rd Degree AV Block

Artifact

Asystole (Flat line)

V-Fib (Ventricular Fibrillation)

Ventricular Tachycardia