A patient with hypertension is found to have thickened arterial walls upon examination. What pathophysiological process is responsible for this finding?

Chronic hypertension leads to persistent elevated intraluminal pressure, causing adaptive and pathological changes in small arteries and arterioles, including smooth muscle hypertrophy, hyaline deposition, and progressive narrowing of vascular lumen, which increases systemic vascular resistance and reduces tissue perfusion. Rationale: A. Arteriolosclerosis is the hallmark vascular change in chronic hypertension, characterized by thickening of arteriolar walls due to hyaline or hyperplastic changes. This results from prolonged pressure stress and leads to increased systemic vascular resistance and end-organ damage. B. Atherosclerosis involves lipid deposition and plaque formation in large and medium-sized arteries. While associated with hypertension, it primarily affects intimal layers and forms plaques rather than uniform arterial wall thickening in arterioles. C. Vasculitis is an inflammatory condition of blood vessels caused by immune-mediated injury. It leads to vessel wall inflammation and necrosis rather than the progressive thickening seen in chronic hypertension. D. Thrombosis refers to intravascular clot formation due to endothelial injury or stasis. It does not cause structural thickening of arterial walls but rather luminal obstruction by clot formation.