INTRODUCTION Serial monitoring of patients participating in clinical trials of carotid artery therapy requires noninvasive precision methods that are inexpensive, safe and widely available. Noninvasive ultrasonic duplex Doppler velocimetry provides a precision method that can be used for recruitment qualification, pre-treatment classification and post treatment surveillance for remodeling and r...

 Introduction: Prevalence of stroke following coronary artery bypass graft surgery (CABG) is % 2.1-5.2 and associated with high mortality. The purpose of this study was to investigate the prevalence of carotid artery disease in patients undergoing CABG surgery.  Methods: This cross-sectional study was performed in the years 2010-2011 on 192 patients who underwent open heart surgery (CABG) in...

11. Katz DM, Smith RA, Otis SM, Dalessio DJ: Doppler sonography diagnosis of cerebrovascular disease. Stroke 7: 439-444, 1976 15. 12. Machleder HI, Barker WF: Stroke on the wrong side. Use of the Doppler Ophthalmic Test in cerebral vascular screening. Arch Surg 105: 943-947, 1972 16. 13. Machleder HI: Evaluation of patients with cerebrovascular disease using the Doppler Ophthalmic Test. Angiolo...

The new method presented in this study was directly based on the consideration that internal carotid arterial Doppler signals are chaotic signals. This consideration was tested successfully using the nonlinear dynamics tools, like the computation of Lyapunov exponents. Multilayer perceptron neural network (MLPNN) architecture was formulated and used as a basis for detecting variabilities such a...

Carotid artery disease was assessed in 180 patients by means of color Doppler flow imaging. Color Doppler findings in 360 carotid arteries were compared with the results of standard Doppler sonography, and color Doppler findings in 60 bifurcations were compared with the results of intraarterial angiography. The sensitivity of color Doppler for the detection of carotid disease was 100% when comp...

Thomas JH: Incidence of recurrent stenosis after carotid endarter-ectomy determined by digital subtraction angiography. Digital transvenous angiography in follow-up examinations after carotid reconstruction. SUMMARY Doppler analysis of flow in intracranlal arteries is now possible using a 2 MHz probe allowing sufficient penetration of bone to obtain signals noninvasivety. Thirty-two normal subj...

We assessed the potential of 2-MHz pulsed-wave transorbital Doppler ultrasonography to delineate the role of the ophthalmic artery as a source of collateral cerebral blood supply by comparing oculopneumoplethysmography, transorbital Doppler ultrasonography, periorbital continuous-wave Doppler ultrasonography, and transcranial Doppler ultrasonography in 25 patients with unilateral internal carot...

The value of the concomittant use of a real time frequency analyzer along with a continuous wave carotid Doppler scanner is demonstrated in this study of 118 cases. With a colour-coded Doppler scanner alone, internal carotid stenoses greater than 35% were diagnosed with a sensitivity of 95% and a specificity of 82%. With the addition of frequency analysis certain inherent problems with Doppler ...

Carotid artery thrombosis and concomitant brain infarction after blunt trauma are rare conditions. We report a 34-year-old woman with multiple traumas due to pedestrian car accident. At the time of initial visiting, she was somnolent and her Glasgow coma scale (GCS) score was 14. Initial vital signs (V/S) and brain computed tomography (CT) scan were normal. One day after admission to the emerge...

Preoperative continuous-wave Doppler spectral analysis was used to generate two parameters, peak frequency in the internal carotid artery (fmax) and the ratio of peak frequencies in the internal and common carotid arteries (carotid index). These were compared with direct measurement of residual lumen diameter in pathologic specimens obtained from carotid endarterectomy in 37 patients. Doppler s...