Decrease in the lumen of arteries is called

Options

A. arteriosclerosis
B. ischaemia
C. atherosclerosis
D. Arrhythmia

Answer

To solve the question "Decrease in the lumen of arteries is called," we will analyze the options provided and identify the correct term that describes this condition.

### Step-by-Step Solution:

1. **Understanding the Lumen of Arteries**:
- The lumen refers to the interior space of a tubular structure, in this case, the arteries. It is the cavity through which blood flows.

2. **Identifying the Condition**:
- A decrease in the lumen of arteries means that the space available for blood flow is reduced. This can lead to restricted blood flow.

3. **Analyzing the Options**:
- **Option A: Atherosclerosis**: This condition is characterized by the buildup of fats, cholesterol, and other substances in and on the artery walls, leading to a narrowing of the lumen.
- **Option B: Ischemia**: This term refers to insufficient blood supply to a tissue, which can occur due to narrowed arteries but does not specifically refer to the narrowing itself.
- **Option C: Atherosclerosis**: This is a repeat of Option A and is still correct.
- **Option D: Arrhythmia**: This term refers to an irregular heartbeat and is unrelated to the narrowing of arteries.

4. **Conclusion**:
- The correct answer is **Option A (or C)**: Atherosclerosis, as it specifically describes the condition of decreased lumen in arteries due to plaque buildup.

### Final Answer:
Decrease in the lumen of arteries is called **Atherosclerosis**.