A prospective blind comparison was completed between duplex sonography and angiography of the vertebral arteries. Thirty-two vertebral arteries were studied for direction of flow, degree of origin plaque or stenosis, Doppler characteristics, and vessel size. The vertebral arteries were reliably identified by imaging their course from the subclavian artery into the transverse foramina and by ide...

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...

BACKGROUND AND PURPOSE Doppler sonography of the carotid arteries is routinely performed before catheter angiography, and its results may bias the subsequent interpretation of angiograms. We attempt to establish that Doppler sonography may show an exaggerated degree of carotid stenosis, introducing bias to the evaluation of carotid stenosis by subsequent catheter angiography. METHODS Angiogra...

abstract  introduction: hypertension is a very common cardiovascular disease with extensive effects on body organs. this study was conducted to compare the extent of target organ damage in hypertensive patients with and without significant nocturnal fall in blood pressure (dippers and non-dippers, respectively). methods: one-hundred patients with recently diagnosed hypertension underwent 24-hou...

The aim of this work was to show contribution of power Doppler imaging in the diagnosis of the carotid body tumors. Six patients with a nontender mass beneath the mandibular angle were evaluated with gray scale and power Doppler sonography. Well-defined, solid, weakly hyperechoic masses were noted on gray scale sonography in the carotid bifurcation. Power Doppler sonography showed abundant flow...

BACKGROUND AND PURPOSE Distal to a hemodynamically significant stenosis, the Doppler effect becomes dampened. Thus, measuring the flow profile in the ophthalmic artery and the central retinal artery with color Doppler imaging may provide hemodynamic information about the carotid circulation. METHODS To validate the flow profile measurement with color Doppler imaging in the ophthalmic and cent...

Transcranial Doppler sonography is a non-invasive, non-ionising, inexpensive, portable and safe technique that uses a pulsed Doppler transducer for assessment of intracerebral blood flow. This article deals with the principles and technique of transcranial Doppler sonography. It gives a brief overview of its use in evaluation of intracranial steno-occlusive disease, subarachnoid haemorrhage, an...

We describe the use of a recently developed technique in the field of color Doppler sonography, called power Doppler or color Doppler energy, that produces better images of the intracranial arteries than those obtained by conventional color Doppler techniques. Color Doppler energy makes it possible to identify aneurysms and their relationship to the parent artery, thus allowing one to observe h...

Introduction Acute aortic dissection (AD) is the most common life-threatening disorder affecting the aorta. Neurological symptoms are present in 17-40% of cases. The management of these patients is controversial. Case report We presented a 37-year-old man admitted for complaining of left-sided weak-ness. Symptoms appeared two hours before admission. The patient had no headache, neither thorac...