Heart Dub sound originated from

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AIIMS BSc NURSING 2024 Memory-Based Paper
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  1. closure of S.L.V.
  2. closure of A.V.
  3. closure of T.V.
  4. closure of V.V.

Answer (Detailed Solution Below)

Option 1 : closure of S.L.V.
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AIIMS BSc NURSING 2024 Memory-Based Paper
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The correct answer is closure of S.L.V.

Explanation:

  • The heart produces characteristic sounds, commonly referred to as the "lub-dub" sounds, which are crucial for diagnosing heart conditions.
  • The "lub" sound, known as the first heart sound (S1), is produced by the closure of the atrioventricular (AV) valves, which include the mitral and tricuspid valves.
  • The "dub" sound, known as the second heart sound (S2), is produced by the closure of the semilunar valves (SLV), which include the aortic and pulmonary valves.
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