Q8 (Description Of EKG & Eletrical Pathway)

Question 1

What does an EKG describe?

Answer 1

Normal graphic depiction of electrical activity occurring in all cardiac muscle cells over a period of time

Question 2

How is the EKG marked?

Answer 2

Marked by 4 waves that show electrical activity happening in each chamber of the heart and how it affects contractions and relaxation

Question 3

What is the first wave?

Answer 3

P wave

Question 4

What happens during a P wave?

Answer 4

Atrial depolarization

Marks the beginning of atrial systole in cardiac cycle

Question 5

What is the 2nd component in an EKG?

Answer 5

QRS Complex

Question 6

What happens during the QRS complex?

Answer 6

1.Ventricular depolarization and atrial depolarization
2. Marks ventricular systole and atrial diastole in cardiac cycle

Question 7

What is the last component in an EKG?

Answer 7

T wave

Question 8

What is happening during a T wave?

Answer 8

1. Ventricular repolarization takes place
2. Marks ventricular diastole in cardiac cycle

Question 9

How does an EKG pertain to the electrical pathway of the heart?

Answer 9

It shows the energy flow through the heart and occurs due to pacemaker cells stimulating contractile cells

Question 10

What is the order of the electrical pathway?

Answer 10

SA Node -> atrial contractile cells -> AV Node -> AV Bundle -> left and right bundle branches -> purkinjae fibers -> ventricular contractile cells