Lecture 3: Arrythmia Part 1

1. This picture above (Figure 1) from a 12-lead EKG is an example of what?

• Premature atrial complexes
• Premature ventricular complexes
• First degree AV block
• Sinus node dysfunction

2. Which of the following can be particularly helpful in a patient with ventricular ectopy?

• Phosphate
• Sodium
• Magnesium
• Chloride

3. Sinus node dysfunction usually

• Does not affect exercise tolerance
• Presents as sinus bradycardia
• Is life threatening
• Requires specific treatments such as beta blockers

4. What is Figure 2 showing?

• Normal sinus rhythm
• Sinus node dysfunction
• 2nd degree AV block, Type 1
• 1st degree AV block

5. Which is true about complete AV block (3rd degree AV block)?

• It is characterized by a gradually longer PR interval and then a dropped P wave
• It is characterized by an occasionally missing QRS complex
• It never requires electrical pacing
• The patient must be assessed for hemodynamic stability first