none of the patients in this group had had a stroke , and the clinical status at follow-up was not found to correlate with the duration of the visual loss ( amaurosis fugax versus ocular infarction ) , frequency ( single versus recurrent episodes ) , sex , presence of headache or heart disease , cigarette smoking , use of oral contraceptives , or abnormal findings on echocardiograms or laboratory studies .
C0149793
amaurosis fugax
C0015392
ocular