Physiology Of EKG Basics

Question 1

What does the P wave begin with?

Answer 1

Atrial depolarization and occurs from right to left

Question 2

What is the QRS complex the beginning of?

Answer 2

Ventricular contraction starting at the septum

Occurs from right to left and from apex to base

Question 3

What is the T wave a representation of?

Answer 3

Ventricular relaxation/repolarization

Question 4

What is an atrial T wave not seen on an EKG?

Answer 4

Hidden by the QRS complex

Question 5

What is the PR interval?

Answer 5

Beginning of P wave to R wave (or Q wave)

Difference of end point not noted

Question 6

What is the PR segment?

Answer 6

End of P wave to Q wave

All atria are contracted

Question 7

What is the ST segment?

Answer 7

End of S wave to beginning of T wave

All ventricle myocytes are contracting

Question 8

What is the QT interval?

Answer 8

Q wave to end of T wave

Question 9

What is the RR interval?

Answer 9

Periods between ventricular depolarizations

Used to determine HR

Question 10

What is the location of leads II, III and aVF?

Answer 10

Inferior

Question 11

What is the location for leads I, aVL, V5 and V6?

Answer 11

Lateral

Question 12

What is the location for leads V1 and V2?

Answer 12

Anterior

Question 13

What is the location for leads V3 and V4?

Answer 13

Septal

Question 14

What indicates a sinus rhythm?

Answer 14

Presence of a P wave

Question 15

Review

Answer 15

How to determine HR on EKG