ECG Question #10


The nurse is caring for a client who is on a telemetry monitor, which reveals several saw-toothed P waves between QRS complexes. The nurse interprets the finding as:


  1. Supraventricular tachycardia
    • Rationale:
  2. Bundle branch block
    • Rationale:
  3. Atrial fibrillation
    • Rationale:
  4. Atrial flutter
    • Rationale:



Atrial flutter causes rapid atrial impulse waves that are regular and appear as sawtooth P waves. This is caused by an electrical signal along the path in the right atrium, but unlike atrial fibrillation, the heart beats fast but in a regular pattern. This pattern is not seen in supraventricular tachycardia, a bundle branch block, or atrial fibrillation.

Learning Outcomes

Test Taking Tip

Video Rationale