**Spurious Hypertension**

**Core Concept**
Spurious hypertension, also known as pseudo-hypertension, refers to the phenomenon where patients have elevated blood pressure readings due to factors unrelated to their actual blood pressure. This can lead to misdiagnosis and inappropriate treatment. Various conditions can cause spurious hypertension, making it essential to identify the underlying cause.

**Why the Correct Answer is Right**
Spurious hypertension can occur due to several mechanisms, including:
- **Pseudohypertension in atherosclerotic arteries**: In patients with severe atherosclerosis, the arteries become calcified, leading to a stiffening of the arterial wall. This stiffness can cause the blood pressure cuff to overestimate the true blood pressure, resulting in spuriously high readings.
- **Arterial stiffness**: Conditions like atherosclerosis, hypertension, and aging can cause arterial stiffness, leading to inaccurate blood pressure measurements.
- **Cuff size**: Using a blood pressure cuff that is too small can result in spuriously high readings, as the cuff may constrict the arm too tightly, causing an artificial increase in blood pressure.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because pseudohypertension in atherosclerotic arteries is a well-documented cause of spurious hypertension.
**Option B:** Incorrect because arterial stiffness is a contributing factor to spurious hypertension.
**Option C:** Incorrect because using a blood pressure cuff that is too small can lead to spuriously high readings.

**Clinical Pearl / High-Yield Fact**
When measuring blood pressure, it's crucial to use a cuff that fits the patient's arm properly, as an ill-fitting cuff can lead to inaccurate readings. Additionally, consider the patient's age and medical history when interpreting blood pressure readings, as certain conditions may cause spurious hypertension.

**Correct Answer: A. Pseudohypertension in atherosclerotic arteries is a classic cause of spurious hypertension.**