EKG Certification Exam
What does the P wave represent? - atrial contraction Define: Repolarization - when the heart recovers electronically Define: Depolarization - contraction of cardiac cells What does the QRS wave represent? - ventricular contraction What does the T wave represent? - ventricular relaxation Which wave only occurs occasionally in some patients? - the U wave What does the vertical line on the EKG represent? - voltage
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