Arrhythmias

Question 1

what is the length of a normal PR interval?

Answer 1

0.12-0.20

Question 2

what is the length of a normal QRS segment?

Answer 2

<0.12

Question 3

what is the HR of bradycardia?

Answer 3

<60bmp

Question 4

what is the HR of tachycardia?

Answer 4

> 100bmp

Question 5

what is atrial flutter?

Answer 5

supraventricular arrhythmia

Question 6

where does atrial flutter arise?

Answer 6

right atrium

Question 7

what happens during supraventricular arrhythmia ?

Answer 7

electricity circulates around the right atrium at a rapid rate

Question 8

what is atrial fibrillation?

Answer 8

supraventricular arrhythmia

Question 9

what might cause atrial fibrillation?

Answer 9

overstitching of atria

Question 10

what happens to the P wave in atrial fibrillation?

Answer 10

there are no P waves

Question 11

what is a PVC (premature ventricular contraction) followed by?

Answer 11

a complete compensatory pause

Question 12

what happens in the QRS complex in focal ventricular tachycardia?

Answer 12

wide QRS complex and they are slightly irregular

Question 13

what happens in ventricular fibrillation? (3)

Answer 13

there is no organised rhythm, cardiac output drops, patient unconscious

Question 14

what is asystole?

Answer 14

standstill

Question 15

what happens to the PR interval in a 1st degree heart block?

Answer 15

long PR interval (longer than 200ms

Question 16

what is 1st degree heart block caused by?

Answer 16

digoxin, ischemia or intrinsic disease in the AV junction

Question 17

what happens to the PR interval in second degree heart block?

Answer 17

the PR interval lengthens, eventually one P with no following QRS

Question 18

what happens in 3rd degree heart block ?

Answer 18

no association between atrial and ventricular activity