**Core Concept**
Carotid stenosis refers to the narrowing of the carotid arteries, which supply blood to the brain. This condition often results from atherosclerosis, leading to a decrease in blood flow to the brain.

**Why the Correct Answer is Right**
Severe carotid stenosis can lead to cerebral ischemia, potentially resulting in a stroke. The degree of stenosis is crucial in determining the risk of stroke. A significant proportion of patients with carotid stenosis are asymptomatic, while others may experience symptoms such as transient ischemic attacks (TIAs) or amaurosis fugax.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while carotid stenosis can lead to decreased blood flow, it does not directly cause an increase in intracranial pressure.
**Option B:** This option is incorrect because carotid stenosis does not typically cause an increase in blood pressure.
**Option C:** This option is incorrect because while carotid stenosis can lead to decreased blood flow, it does not typically cause an increase in heart rate.

**Clinical Pearl / High-Yield Fact**
A significant proportion of patients with carotid stenosis are asymptomatic, making regular screening and monitoring crucial in identifying those at risk of stroke.

**Correct Answer:** None provided