Certified Medical-Surgical Registered Nurse Practice Test

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Prepare for the Certified Medical-Surgical Registered Nurse Exam with confidence. Our comprehensive quiz features multiple-choice questions paired with hints and explanations to enhance your understanding and readiness for the exam.

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What does an extra heart sound immediately after the second heart sound (S2) indicate in a patient with mitral insufficiency?

  1. A first heart sound (S1)

  2. A third heart sound (S3)

  3. A fourth heart sound (S4)

  4. A mitral murmur

The correct answer is: A third heart sound (S3)

An extra heart sound immediately after the second heart sound (S2) in a patient with mitral insufficiency indicates a third heart sound (S3). The presence of an S3 sound is often associated with heart failure and volume overload. It is caused by rapid ventricular filling during the early diastole phase. The S3 sound is sometimes referred to as a ventricular gallop and is a key auscultatory finding indicating possible heart failure.

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