Impact of duplex scanning on carotid endarterectomy

The influence of smoking and lipids on restenosis after carotid endarterectomy

Factors associated with restenosis were investigated in 107 patients undergoing carotid endarterectomy for symptomatic disease. The patients, 71 men and 36 women with mean age 68 +/- 8 years, were followed up for 1 year by serial Duplex scanning. Carotid restenosis of > or = 50% developed in 18 patients (17%), 11 men and seven women. Restenosis was not influenced by age, sex, diabetes or hypertension. Continuing smokers, serum cotinine > 200 nmol/l, had a significantly higher incidence of > or = 50% restenosis after 1 year (39%), compared with only 16% of non-smokers, p = 0.023. Restenosis > or = 50% also was associated significantly with below median body mass index (p = 0.027). Women undergoing carotid endarterectomy had higher levels of cholesterol (median 7.4 mmol/l) and apolipoprotein B (median 0.81 g/l) than men (median cholesterol 6.4 mmol/l, median apolipoprotein B 0.69 g/l), p < 0.01. For men only, restenosis of > or = 50% was associated with low levels of serum cholesterol (median 5.7 mmol/l), p = 0.002. For women cholesterol levels were higher (median 8.1 mmol/l) in those with > or = 50% restenosis. Smoking adversely influences early restenosis (1 year) after carotid endarterectomy. Hyperlipidaemia is not a risk factor for restenosis in men, but may be associated with restenosis in women.

Duplex scanning alone before carotid endarterectomy: a 5-year experience

The role of duplex scanning and arteriography as a means of assessing patients for carotid endarterectomy has been reviewed for the period 1984 to 1988 when 98 carotid endarterectomies were performed. Of these 44 were selected for surgery on the basis of duplex assessment alone, 48 after carotid angiography and duplex scanning and six after angiography alone. No difference between the groups of patients was observed for either perioperative or follow-up complication rates, although all late deaths occurred in patients who had been examined by angiography. By the end of the study period angiography was requested for less than 30% of all patients undergoing carotid endarterectomy. It is argued that the change in our practice is safe provided that certain criteria are met. These include angiography in cases of suspected aortic arch or proximal vessel disease and in those symptomatic patients with a duplex diagnosis of complete occlusion.