10. EKG part 2 Flashcards Preview

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Flashcards in 10. EKG part 2 Deck (11):
1

What is ventricular fibrillation?

  • Some coarse, random electrical activity is present, but no clear QRS complex
  • Shockable

2

What is asystole?

  • Flat line
  • No residual electricity

3

What is the normal duration of a P wave?

< 0.12 sec

4

What duration of the QRS interval is considered abnormal?

0.12 secs or greater

5

What does a long PR duration suggest?

1° AV block

6

What does a short PR duration suggest?

Pre-excitation syndrome bypassing the AV node (such as WPWS)

7

Define axis.

Direction of ventricular depolarization in the frontal/coronal plane

8

What is a normal axis?

Down and leftward (0-90º)

9

What is the sequence of ventricular depolarization?

  1. Septum depolarizes right & downward
  2. Bundle branches simultaneously depolarize the R and L ventricles (mass wins --> left & downard axis)

10

What is a bipolar lead?

Impulse that goes one way (up/down) first, then goes the other way

11

What is the simplest way to determine axis?

Look to see if QRS is positive for leads 1 and aVF