Heart Blocks

Question 1

Which block?

more p waves than QRS

nothing to do with each other

Answer 1

3rd degree

Question 2

Which block?

there is a randomly dropped QRS and PRI is same throughout

Answer 2

2nd degree type 2

Question 3

Which block?

PRI long, longer, drops QRS

Answer 3

2nd degree type 1

Question 4

Which block?

PRI long (more than 0.20 seconds)

Answer 4

First degree

Question 5

What is the only rule of first degree heart block?

Answer 5

PRI is more than 0.20 seconds

Question 6

What is the PRI measurement for 2nd degree type 1?

Answer 6

“variable”

b/c it is long, then longer

Question 7

What can still be measured in second degree type 2 block?

Answer 7

• Atrial rate
• ventricular rate
• QRS

PRI “variable”

Question 8

What can you measure with 2nd degree type 2 block?

Answer 8

• PRI (they are all the same)
• atrial rate
• ventricular rate

Question 9

With 3rd degree heart block:

What do the p waves have in common?

Answer 9

they should march out and be same distance to each other

but have no connection to QRS

Question 10

With 3rd degree heart block, what do the QRS waves have in common?

Answer 10

they should march out and be same distance to each other

but have no connection to p waves

Question 11

What can be measured with third degree heart block?

Answer 11

atrial rate

ventricular rate