Medical Surgical NCLEX RN Related

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A client is admitted with a myocardial infarction and new onset atrial fibrillation. While auscultating the heart, the nurse notes an irregular heart rate and hears an extra heart sound at the apex after the S2 that remains constant throughout the respiratory cycle. The nurse should document these findings as:

  • A. Heart rate irregular with S3.
  • B. Heart rate irregular with S4.
  • C. Heart rate irregular with aortic regurgitation.
  • D. Heart rate irregular with mitral stenosis.
Correct Answer: A

Rationale: An extra heart sound after S2 at the apex, constant through the respiratory cycle, is an S3, often associated with heart failure post-myocardial infarction. Atrial fibrillation causes an irregular heart rate.