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Extracoronary in vivo structural arterial changes were studied in asymptomatic essential hypertension. Carotid and femoral arteries were examined with B-mode echography for the presence or absence of plaque (the whole vascular segments of each vessel in the both sides) and for automated measurement of the far wall intima-media thickness (the vascular segment of each vessel proximal to the bifurcation in the right side) in 53 never treated hypertensive men and 133 normotensive men similar with regard to age, serum cholesterol levels, and smoking history. In the hypertensive group carotid plaque was more frequent (P &lt; .05) and carotid and femoral intima-media thicknesses were greater (P &lt; .001) than in the normotensive group. In the overall normotensive and hypertensive population intima-media thickness was independently associated with age and systolic pressure in both arteries (P &lt; .001) and with cholesterol in the femoral artery (P &lt; .05) while plaque was associated with systolic pressure (P &lt; .01), and cholesterol (P &lt; .01) in the carotid arteries and with age (P &lt; .01), cholesterol (P &lt; .05), and smoking (P &lt; .001) in the femoral arteries. No significant difference in intima-media thickness in both arteries existed between hypertensive subjects with plaque and those without. Wall thickening and plaque were more frequent in hypertensive patients. Thickening was distributed homogeneously to both arteries, while plaque affected preferentially the femoral bed. The influence of age and pressure was more marked on intima-media thickness than on plaque. The lack of association between wall thickening and plaque suggested that vascular hypertrophy and early atherosis might be two different structural changes.

Echographic assessment of carotid and femoral arterial structure in men with essential hypertension