First sound recorded in sphygmomanometer indicates

Options

A. Systolic pressure
B. Diastolic pressure
C. Lubb
D. Dubb

Answer

To answer the question, "First sound recorded in sphygmomanometer indicates," we can break down the information as follows:

### Step-by-Step Solution:

1. **Understanding Sphygmomanometer**: A sphygmomanometer is a device used to measure blood pressure. It records two key pressures: systolic and diastolic.

2. **Identifying Heart Sounds**: The heart produces two main sounds during its cycle:
- **First Sound (Lub)**: This sound is known as "lub" and is produced when the tricuspid and bicuspid (mitral) valves close.
- **Second Sound (Dub)**: This sound is known as "dub" and occurs when the aortic and pulmonary valves close.

3. **Relating Sounds to Blood Pressure**:
- The first sound (lub) corresponds to the **systolic pressure**, which is the pressure in the arteries when the heart beats and pumps blood.
- The second sound (dub) corresponds to the **diastolic pressure**, which is the pressure in the arteries when the heart is at rest between beats.

4. **Conclusion**: Therefore, the first sound recorded in a sphygmomanometer indicates the **systolic pressure**.

### Final Answer:
The first sound recorded in a sphygmomanometer indicates **systolic pressure**.

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