Pulmonary Embolism and Deep-Vein Thrombosis · NCLEX Exam

Which electrocardiogram (EKG) change may be seen in acute PE?

  1. ST-segment elevation confined to leads V1–V4
  2. Marked sinus bradycardia with a junctional escape
  3. S1Q3T3 pattern (S in lead I, Q and inverted T in lead III)
  4. A new right bundle branch block from right heart strain
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Correct answer: S1Q3T3 pattern (S in lead I, Q and inverted T in lead III)

The S1Q3T3 pattern is a classic but not always present EKG finding in acute PE indicating right heart strain.

Difficulty: Medium Question 17 of 20

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