ECGs

Question 1

What are the ECG signs of first degree heart block?

Answer 1

PR interval > 200ms

Question 2

What is the management of first degree heart block?

Answer 2

if symptomatic may require pacemaker

if asymptomatic can be monitored as an outpatient

Question 3

What type of heart block is it when there is 2 p waves for every QRS complex?

Answer 3

second degree heart block (fixed ratio 2:1)

Question 4

What are the types of second degree heart block?

Answer 4

Type I (wenckebach) - progressive prolongation of PR
Type II - no prolongation - just occasional missing of a QRS for a P wave
fixed ratio blocks

Question 5

What are the signs of third degree heart block on ECG?

Answer 5

no relationship between P waves and QRS complexes

Question 6

What is the main cause of an irregular narrow complex tachycardia?

Answer 6

AF

Question 7

What are the 4 differentials for a regular narrow complex tachycardia?

Answer 7

AVRT/AVNRT, sinus tachycardia, atrial tachycardia, atrial flutter

Question 8

What can you do to help differentiate the cause of a regular narrow complex tachycardia?

Answer 8

do a vagal manouevre or give adenosine