Which of the following is a potential consequence of stenosis?

Stenosis refers to a narrowing of a blood vessel, which can significantly affect blood flow dynamics. When stenosis occurs, the narrowed area restricts normal blood flow, leading to increased resistance. This increased resistance can elevate the risk of thrombosis, which is the formation of a blood clot within the blood vessels. The clot can develop due to the turbulent flow and stagnation of blood that often accompanies stenosis.

In contrast, improved blood flow would not occur with stenosis because the narrowing directly impedes it. Decreased blood pressure can also be a consequence of conditions affecting blood flow but is not directly tied to stenosis itself; rather, it is the resultant complications from low flow that might affect blood pressure. Reduction in kidney size is typically associated with chronic conditions rather than a direct consequence of stenosis and usually results from long-term decreased perfusion and functional loss rather than the acute effects of the stenosis alone. Thus, the potential for increased risk for thrombosis is the most accurate consequence related to stenosis in this context.