ECG Basics

Question 1

PR interval regular seconds

Answer 1

0.12 - 0.20

Question 2

QRS complex regular seconds

Answer 2

0.06 - 0.12

Question 3

QT interval regular seconds

Answer 3

0.40 seconds

Question 4

P wave shows

Answer 4

atrial contraction; depolarization

Question 5

PR segment shows

Answer 5

movement of electrical activity from atria to ventricles

Question 6

QRS complex shows

Answer 6

ventricle contraction; depolarization

Question 7

ST segment shows

Answer 7

time between ventricular depolarization and repolarization

Question 8

T wave shows

Answer 8

ventricle relaxing; repolarization

Question 9

TP interval shows

Answer 9

ventricles relaxing and filling

Question 10

In a 12 lead ECG, leads V1 - V6 shows the _______ plane of the heart

Answer 10

horizontal / transverse

Question 11

Leads II, III, and avF are _______ leads

Answer 11

inferior; receives blood flow from R coronary artery

Question 12

Leads I, avL, V5, and V6 are _______ leads

Answer 12

lateral; receives blood from circumflex artery

Question 13

Leads V1 and V2 are _______ leads

Answer 13

septal; receives blood from L anterior descending artery

Question 14

Leads V3 and V4 are _________ leads

Answer 14

anterior; receives blood from L anterior descending artery