EKG Certification Exam fully solved graded A+ 2023/2024

EKG Certification ExamWhat does the P wave represent? - correct answer atrial contraction Define: Repolarization - correct answer when the heart recovers electronically Define: Depolarization - correct answer contraction of cardiac cells What does the QRS wave represent? - correct answer ventricular contraction What does the T wave represent? - correct answer ventricular relaxation Which wave only occurs occasionally in some patients? - correct answer the U wave What does the vertical line on the EKG represent? - correct answer voltage What does the horizontal line on the EKG represent? - correct answer time What is a baseline? - correct answer the flat line that separates the various waves What is one box equal to? - correct answer .04 sec What are 5 large squares equal to? - correct answer .2 sec What does BPM stand for? - correct answer beats per minute What is electrolyte? - correct answer substance used to conduct current better What forms does electrolyte come in? - correct answer gels, lotions, pastes, adhesive pads Why is electrolyte necessary? - correct answer because the skin is a poor conductor of electricity What are electrodes? - correct answer sensors that detect electrical impulses on the body surface What are electrodes made of? - correct answer metal or other conductive material What are lead wires? - correct answer the wires that connect the sensors to the machine How can older electrocardiograph machines be adapted or converted to operate with the current self-adhesive electrodes? - correct answer order a set of alligator clips from the manufacturer How many sensors are on a standard EKG? - correct answer 10 How many leads do the sensors record? - correct answer 12 What are the sensors recording? - correct answer the electrical activity of the heart What are the four limb leads? - correct answer right arm, left arm, right leg, left leg Which limb lead is called the "ground" or "reference electrode"? - correct answer right leg Where on the limbs are the sensors placed? - correct answer fleshy, non-muscular portion of upper arms and lower legs Lead I records the electrical activity between the... - correct answer right arm and left arm