seventy patients with af only ( no tias ) , 104 patients with hemispheric tias ( no af ) , 185 patients without focal carotid territory symptoms ( i.e. , vertebrobasilar tias or asymptomatic carotid bruit only ) , and 129 patients with stroke and good recovery were studied with ct scan and duplex scanning to grade the degree of stenosis of the internal carotid artery ( grades : a = normal , b = 0 % to 15 % stenosis , c = 16 % to 49 % , d = 50 % to 99 % , and e = occlusion ) .
C0007787
tias
C0038454
stroke