Heart Blocks

Question 1

What does a long PRI indicate ?

Answer 1

heart block

Question 2

What is this rhythm ?
1. prolonged pri that’s always the same length throughout the strip
2. regular
3. one p-wave for every narrow qrs

Answer 2

first degree heart block

Question 3

What is this rhythm ?
1. prolonged pri that becomes progressively longer (with p-waves that are the same size) until the PR drops
2. may have more p-waves than qrs
3. normal/narrow qrs

Answer 3

second degree heart block type 1

Question 4

What is this rhythm ?
1. prolonged pri that doesn’t get progressively longer
2. consistent pri when present
3. may have more p-waves than qrs

Answer 4

second degree heart block type 2

Question 5

What is this rhythm ?
1. absent pri (may look really long) or p-wave buried in qrs
2. may have more p-waves than qrs
3. slow heart rate
4. same r to r throughout
5. no relationship between p-waves and qrs
6. no such thing as a gradually shortening pri, so may be a third degree heart block if you see this

Answer 5

third degree heart block

Question 6

What is a PR drop ?

Answer 6

one p-wave followed by a missing beat then it returns to the previous rhythm with the same gradual change