Which of the following statement is wrong for second cardiac sound?

Options

A. It is heard as dup
B. It is produced due to closure of semilunar valves
C. It is clinically significant
D. It is clinically non significant

Answer

To determine which statement is wrong regarding the second cardiac sound (S2), we need to analyze the characteristics and significance of S2.

**Step-by-Step Solution:**

1. **Understanding S2**: The second heart sound (S2) is produced by the closure of the semilunar valves (aortic and pulmonary valves) at the end of ventricular systole. This sound is often described as a "dub" sound in the classic "lub-dub" heartbeat.

2. **Characteristics of S2**:
- S2 is a high-pitched sound.
- It has a shorter duration compared to the first heart sound (S1).
- It is clinically significant, as it can indicate the functioning of the heart valves.

3. **Clinical Significance**:
- S2 is generally considered clinically significant. Abnormalities in S2 can indicate issues with the heart, such as valve problems or heart failure.
- A "non-significant" S2 would imply that there are no clinical implications, which is incorrect.

4. **Identifying the Wrong Statement**:
- If any statement suggests that S2 is not clinically significant or misrepresents its characteristics (like its duration or pitch), that statement would be considered wrong.

5. **Conclusion**: Based on the analysis, the statement that claims S2 is clinically non-significant is incorrect. Therefore, this is the wrong statement regarding the second cardiac sound.

**Final Answer**: The wrong statement regarding the second cardiac sound (S2) is that it is clinically non-significant.

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