How would the nurse differentiate between premature atrial contractions (PACs) and premature junctional contractions (PJCs) on the patient's cardiac monitor tracing?
1. The beat in question is early in the rhythm.
2. A PJC has an inverted P wave.
3. The QRS looks essentially normal.
4. The heart rate is 60.
2
Rationale 1: Both PACs and PJCs are early in the rhythm.
Rationale 2: A characteristic of PJCs is an inverted P wave before, after, or buried in the QRS.
Rationale 3: The QRS of both PACs and PJCs can look essentially normal.
Rationale 4: PACs and PJCs can occur in a slow heart rate.
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