Heart ECG

Question 0

QRS complex

Answer 0

Ventricular depolarization

Question 1

P wave

Answer 1

Atrial depolarization

Question 2

T wave

Answer 2

Ventricular repolarization

Question 3

P-Q interval

Answer 3

Time of conduction through AV node

Question 4

Q-T interval

Answer 4

Ventricles contracting: ventricular systole

Question 5

T-Q interval

Answer 5

Ventricles relaxing: ventricular diastole

Question 6

R-R interval

Answer 6

Time between two successful QRS peaks = heart beat

HR = 60/R-R

Question 7

Cardiac arrhythmias

Answer 7

Abnormal SA nodal firing

Question 8

Tachycardia

Answer 8

More than 100 beats/min

Question 9

Bradycardia

Answer 9

Less than 50 beats/min

Question 10

1st degree heart block

Answer 10

AV node is slowed

Increase P-Q interval

Question 11

2nd degree heart block

Answer 11

AV node does not always occur.

If it doesn’t occur, no QRS complex or T wave

Question 12

3rd degree heart block

Answer 12

No conduction thru AV node

Can be deadly bc insufficient blood supply to the body

Question 13

PAC

Answer 13

Premature atrial contraction

Question 14

PVC

Answer 14

Premature ventricular contraction

Question 15

A-Fib (atrial fibrillation)

Answer 15

No longer demonstrates synchronized depolarization.

Can cause clots by blood churning in atria.

Question 16

Ventricular fibrillation

Answer 16

Deadly. Same as A-Fib. Causing inefficient blood flow to the body

Question 17

Defibrillate

Answer 17

Shock heart to get back into synchronization