Waves and their functions

Question 1

P wave

Answer 1

Atrial Depolarization or when the impulse starts in the SA node and causes the atria to contract

Question 2

QRS complex

Answer 2

Ventricular Depolarization or when the impulse moves through the AV node, the bundle of His, and Purkinje fibers causes the ventricles to contract

Question 3

T wave

Answer 3

Repolarization

Question 4

U wave

Answer 4

Often indicative of electrolyte imbalance