Chapter 9 - The P-wave Flashcards

1
Q

P-waves are (+) in what leads?

A

I, II, V4-V6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

P-waves are negative in what leads?

A

AVR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Criteria for right atria enlargement diagnosis

A
  • p-wave greater than 0.-2 S

- P-wave “notching” with the NOTCH more wide than 0.04s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Explain the ECG changes with right atrial enlargement

A

1) widening of the p-wave occurs due to enlarged right atria
2) More tissue (RAE) requires greater time for the AP to be conducted down intermodal pathways.
3) L atria conduction time remains the same.
4) the increased RA conduction widens the p-wave and adds the “notch”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Explain the criteria for diagnosing p-pulmonale.

What does p-pulmonale indicate?

A
  • Found in leads I and II
  • p-wave greater than 2.5 mm
  • Right atrial enlargement
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Explain the criteria for diagnosing p-mitrale.

What does p-mitrale indicate?

A
  • p wave longer than 0.12 s (3 boxes)
  • a “notched” p-wave with a notch > 0.04 s (1 box)
  • Left atrial enlargement
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Explain the criteria for diagnosing intraatrial conduction delay.

A
  • It indicates a “non-specific delay”

- Any criteria for diagnosing RAE or LAE can be used to determine which specific type of delay it is.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly