ECGs

Question 1

Normal PR Interval?

Answer 1

0.12-0.2 sec

Question 2

Normal QRS interval?

Answer 2

<0.12 sec

Question 3

Atrial Flutter?

Answer 3

See saw rhythm!

• Regular or Irregular
• Fast rate (250-350bpm) for atrial but ventricular is slower
• P waves absent
• PRI absent
• QRS normal (0.06-0.10s)

Question 4

Atrial Fibrilliation?

Answer 4

• Irregular Rhythm
• Very fast rate < 350 atrial but ventricular can be too
• P wave is erratic, waves are present; slow normal or fast
• PRI absent

Question 5

Ventricular Fibrillation

Answer 5

Absolute chaos, no rhythm or wave.

• Highly irregular rhythm
• Rate n/a
• P wave n/a
• PRI n/a
• QRS none

Question 6

Ventricular Tachycardia

Answer 6

• Regular rhythm
• Fast rate (100-250bpm)
• P waves absent
• PRI n/a
• QRS wide (>0.10s), bizarre, appearance