OBJECTIVE To determine frequency of carotid artery disease in patients undergoing elective coronary artery bypass grafting (CABG) using Doppler sonography. STUDY DESIGN Observational study. PLACE AND DURATION OF STUDY Radiology Department, The Aga Khan University Hospital, Karachi, from January 2005 to September 2008. METHODOLOGY Patients with known cardiovascular disease waiting for CABG...

background: in patients with acute stroke and middle cerebral artery (mca) stenosis, microembolic signals (mes) can predict further cerebral ischemia. therefore, this study was designed to evaluate the prevalence of mes by transcranial doppler (tcd) in patients with mca stenosis under treatment of aspirin or clopidogrel. methods: a randomized clinical trial was performed on 40 patients with acu...

The volume flowmeter is a simple, noninvasive Doppler ultrasound technique that provides accurate measurement of carotid artery diameter and flow. The device provides a useful laboratory test that can aid significantly in diagnosis of carotid stenosis and dementia.

Carotid arteriograms and combined real-time B-mode and Doppler sonograms were evaluated by independent observers of 101 carotid arteries in 51 consecutive patients. The results were correlated . For Duplex detection of hemodynamically significant stenosis, a specificity of 97% was obtained, sensitivity of 94%, and accuracy of 96% . The Duplex examination is an accurate method for evaluating car...

Carotid duplex ultrasonography is a noninvasive technique for hemodynamically significant stenosis detection and cardiovascular risk estimation. Anatomic information of carotid arteries is provided by B-mode scanning. Hemodynamic features are displayed color-flow and pulsed Doppler imaging. Examination technique, normal carotid anatomy and flow pattern, and potential limitations are presented.

To-and-Fro Movement and External Escape of Carotid Arterial Blood in Brain Death Cases. A Doppler Ultrasonic Study • In brain death cases who showed nonfilling phenomena in the internal carotid angiograms, the blood flow velocity patterns of the common carotid arteries were characterized by involvement of a single systolic peak and a marked reverse flow component which had never been observed i...

Material and methods. Colour Duplex Doppler was used for screening of carotid pathology in 1104 patients with PAD, IHD, transitory ischemic attacks and an ischemic stroke. The group of 205 patients who had stenosis of a. carotis interna >60%, were divided into three subgroups – patients with asymptomatic carotid stenosis (ACS), patients with symptomatic carotid stenosis (SCS) and patients with ...

Accurate assessment of gestational age, fetal growth, and the detection of fetal and placental abnormalities are major benefits of sonography. Color Doppler can be used to assist in the identification of vascular architecture, detection of vascular pathology and visualization of blood flow changes associated with physiologic processes and disease states. The clinical applications of obstetrical...

Background: Carotid endarterectomy is effective in reducing recurrent stroke in patients with carotid stenosis. Duplex sonography is widely used for diagnosing internal carotid artery (ICA) stenosis. Surgeons often base management decisions solely on this technique. Published velocimetric criteria should be validated in each laboratory. This study aims to validate Doppler velocimetric criteria ...

Cervical internal carotid dissection is not rare. Doppler ultrasound screening of young patients presenting with stroke, identified 10 patients with reduced common and internal carotid blood flow without any evidence of atheroma. Eight, on angiography proved to have a dissection of the cervical internal carotid artery. All were managed conservatively. Seven received anticoagulant therapy, stopp...