TY - JOUR
T1 - Evolution and management of asymptomatic carotid stenosis.
AU - Bornstein, N. M.
AU - Norris, J. W.
PY - 1993
Y1 - 1993
N2 - About 4% of adults have asymptomatic neck bruits, and this frequency increases with age. Only a small number of these (about 25%), however, have asymptomatic carotid stenosis (ACS), and only 10% of these have stenoses > 75%. The vascular outcome for patients with ACS depends upon the severity of carotid stenosis, all outcomes worsening after 75-80% stenoses. For stenoses < 50%, annual stroke rate is about 1% and does not change in stenoses 50-75%, but over 75%, annual stroke rate increases to 3.3% per year. Ischaemic cardiac event rate is 2.7% annually for stenoses < 50%, 6.6% for those 50-75%, and 8.3% for stenoses > 75%. Annual vascular death rates also rise from 1.8%, 3.3% and 6.5% respectively. Stroke risk factors such as hypertension and smoking are important in early plaque formation, but when plaques become stenosing, local hemodynamic factors such as turbulence are the major factors in arterial remodelling. No medical or surgical therapy has yet been found effective, but current surgical randomized trials may reveal the answer in the near future.
AB - About 4% of adults have asymptomatic neck bruits, and this frequency increases with age. Only a small number of these (about 25%), however, have asymptomatic carotid stenosis (ACS), and only 10% of these have stenoses > 75%. The vascular outcome for patients with ACS depends upon the severity of carotid stenosis, all outcomes worsening after 75-80% stenoses. For stenoses < 50%, annual stroke rate is about 1% and does not change in stenoses 50-75%, but over 75%, annual stroke rate increases to 3.3% per year. Ischaemic cardiac event rate is 2.7% annually for stenoses < 50%, 6.6% for those 50-75%, and 8.3% for stenoses > 75%. Annual vascular death rates also rise from 1.8%, 3.3% and 6.5% respectively. Stroke risk factors such as hypertension and smoking are important in early plaque formation, but when plaques become stenosing, local hemodynamic factors such as turbulence are the major factors in arterial remodelling. No medical or surgical therapy has yet been found effective, but current surgical randomized trials may reveal the answer in the near future.
UR - http://www.scopus.com/inward/record.url?scp=0027764894&partnerID=8YFLogxK
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AN - SCOPUS:0027764894
SN - 1040-8827
VL - 5
SP - 301
EP - 313
JO - Cerebrovascular and Brain Metabolism Reviews
JF - Cerebrovascular and Brain Metabolism Reviews
IS - 4
ER -