It seems to us that you have your javascript turned off on your browser. Javascript is required in order for our site to behave correctly. Please enable your javascript to continue use our site. Official reprint from uptodate® www. buy viagra jakarta Uptodate. buy viagra for men Com ©2012 uptodate® print | back full text close please select the full text article you wish to view: print medline ® abstract for reference 22 of 'evaluation of carotid artery stenosis' 22 pubmed ti carotid doppler ultrasound criteria for internal carotid artery stenosis based on residual lumen diameter calculated from en bloc carotid endarterectomy specimens. buy viagra jakarta Au suwanwela n, can u, furie kl, southern jf, macdonald nr, ogilvy cs, hansen cj, buonanno fs, abbott wm, koroshetz wj, kistler jp so stroke. 1996;27(11):1965. viagra without a doctor prescription   background and purpose: carotid duplex ultrasound is widely used to screen patients for carotid endarterectomy and if combined with mr angiography and transcranial doppler may be an alternative to conventional angiography in the preoperative assessment. We have examined the correlation between doppler velocities and the residual lumen diameters of internal carotid arteries from surgical pathological specimens to establish doppler criteria for residual lumen diameter independent of percent stenosis. Methods: ninety-one patients who underwent 99 carotid endarterectomies for internal carotid artery stenosis within 6 months of their carotid duplex ultrasound evaluation were studied. The endarterectomy specimens were removed en bloc, and the minimal residual lumen diameter was calculated by computer analysis. The sensitivity and specificity of the doppler criteria for determining high-grade stenosis were calculated and receiver-operator curves generated. Results: peak systolic velocity (psv), end-diastolic velocity (edv),andcarotid index (peak internal carotid artery velocity/ common carotid artery velocity) correlated with the residual lumen diameter. cheap viagra Psv>440 cm/s, edv>155 cm/s, or carotid index>10 indicated a residual lumen diameter ofviagra cost 5 mm (specificity of 100% and sensitivity of 58%, 63%, and 30%, respectively). 50 mg viagra effects When these criteria were combined, the sensitivity increased to 72%. A psv>200 cm/s combined with either an edv>140 cm/s or a carotid index>4. viagra samples 5 has a sensitivity of 96% and a specificity of 61%. Conclusions: doppler criteria can be both specific and sensitive for detecting a significant stenosis, defined as a Ad stroke service, massachusetts general hospital, bo. viagra how long before it takes effect