Magnetic Resonance Angiography

Publication Title: 
Neuroradiology

INTRODUCTION: Extract of Ginkgo biloba (EGb), a dietary supplement used for a number of conditions including dementia, has been suggested to increase cerebral bloodflow (CBF). The purpose of this study was to determine if changes in CBF could be detected by dynamic susceptibility contrast-enhanced magnetic resonance imaging (DSC-MRI)in elderly human subjects taking EGb. METHODS: DSC-MRI was performed in nine healthy men(mean age 61±10 years) before and after 4 weeks of 60 mg EGb taken twice daily. One subject underwent six consecutive scans to evaluate intrasubject reproducibility.

Author(s): 
Mashayekh, Ameneh
Pham, Dzung L.
Yousem, David M.
Dizon, Mercedes
Barker, Peter B.
Lin, Doris D. M.
Publication Title: 
Neuroradiology

INTRODUCTION: Extract of Ginkgo biloba (EGb), a dietary supplement used for a number of conditions including dementia, has been suggested to increase cerebral bloodflow (CBF). The purpose of this study was to determine if changes in CBF could be detected by dynamic susceptibility contrast-enhanced magnetic resonance imaging (DSC-MRI)in elderly human subjects taking EGb. METHODS: DSC-MRI was performed in nine healthy men(mean age 61±10 years) before and after 4 weeks of 60 mg EGb taken twice daily. One subject underwent six consecutive scans to evaluate intrasubject reproducibility.

Author(s): 
Mashayekh, Ameneh
Pham, Dzung L.
Yousem, David M.
Dizon, Mercedes
Barker, Peter B.
Lin, Doris D. M.
Publication Title: 
Zhonghua Yi Xue Za Zhi = Chinese Medical Journal; Free China Ed

A 32-year-old healthy man developed vomiting, blurred vision, and consciousness disturbance following cervical manipulation. Physical examination showed stuporous consciousness and spontaneous horizontal nystagmus. Computed tomography (CT) and magnetic resonance (MR) imaging of the brain revealed infarction in the territory of the basilar artery. Studies of MR angiography and vertebral angiography disclosed dissection of the right vertebral artery at the atlantoaxial segment. Antiedematous drugs were prescribed and the patient gradually improved.

Author(s): 
Wang, J. L.
Lin, J. J.
Lin, J. C.
Lie, C. C.
Shih, T. P.
Tsao, W. L.
Publication Title: 
American Journal of Ophthalmology

PURPOSE: To document a case of central retinal artery occlusion after chiropractic treatment. METHODS: An 87-year-old man suffered a central retinal artery occlusion immediately after chiropractic neck manipulation. RESULTS: A magnetic resonance angiogram showed an atherosclerotic plaque in the ipsilateral carotid artery, which probably shed emboli during cervical joint mobilization. CONCLUSION: The carotid arteries should be approached carefully in patients with known or suspected atherosclerotic disease of the carotid arteries.

Author(s): 
Jumper, J. M.
Horton, J. C.
Publication Title: 
Journal of Manipulative and Physiological Therapeutics

OBJECTIVE: To discuss the use of magnetic resonance angiography (MRA) imaging as a definitive means to assess vascular patency and the relative value of various vertebral artery screening maneuvers. CLINICAL FEATURES: Two female patients suffered head and neck trauma with possible vertebral artery insufficiency. Positive vertebral artery screening tests with consistent symptoms were present in both cases. One patient had a congenitally narrowed vertebral artery, whereas the second had no evidence of vascular anomaly.

Author(s): 
Combs, S. B.
Triano, J. J.
Publication Title: 
Neuroradiology

A review of 4,500 angiograms yielded 11 patients with dissection of the vertebral arteries who had MRI and (in 4 patients) MR angiography (MRA) in the acute phase of stroke. One patient with incidental discovery at arteriography of asymptomatic vertebral artery dissection and two patients with acute strokes with MRI and MRA findings consistent with vertebral artery dissection were included. Dissection occurred after neck trauma or chiropractic manipulation in 4 patients and was spontaneous in 10.

Author(s): 
Mascalchi, M.
Bianchi, M. C.
Mangiafico, S.
Ferrito, G.
Puglioli, M.
Marin, E.
Mugnai, S.
Canapicchi, R.
Quilici, N.
Inzitari, D.
Publication Title: 
Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine

Vertebral artery dissections (VADs) following a variety of minor traumatic mechanisms have been previously reported. This article reports 2 cases of VAD with delayed recognition following motor vehicle collisions (MVCs). The first VAD patient developed major neurologic abnormalities 28 hours after an MVC. The second VAD patient presented with 3 weeks of neck and head pain beginning 8 weeks after an MVC and subsequent chiropractic manipulation. The anatomy and pathophysiology of VAD are reviewed.

Author(s): 
Showalter, W.
Esekogwu, V.
Newton, K. I.
Henderson, S. O.
Publication Title: 
Neurosurgical Review

A 50-year-old woman presented a sudden left occipital headache and a posterior circulation stroke after cervical manipulation for neck pain. Magnetic resonance imaging documented a left intracranial vertebral artery occlusive dissection associated with an ipsilateral internal carotid artery dissection with vessel stenosis in its prepetrous tract. This is the first reported case showing an associate vertebral and carotid artery dissection following cervical manipulation. Carotid dissection was asymptomatic and, therefore, its incidence may be underestimated.

Author(s): 
Parenti, G.
Orlandi, G.
Bianchi, M.
Renna, M.
Martini, A.
Murri, L.
Publication Title: 
Journal of Neuro-Ophthalmology: The Official Journal of the North American Neuro-Ophthalmology Society

Cervical manipulation, specifically chiropractic manipulation, is an important cause of vertebrobasilar and occasionally carotid distribution strokes. Neuro-ophthalmologic findings are a common and at times relatively isolated feature of cervical manipulation-induced stroke. A case of chiropractic-induced occipital lobe infarction with homonymous hemianopsia is reported, and the literature regarding neuro-ophthalmologic findings is reviewed.

Author(s): 
Devereaux, M. W.
Publication Title: 
Cerebrovascular Diseases (Basel, Switzerland)

We present 3 cases of stroke due to arterial dissection following chiropractic manipulation: (1) a 31-year-old woman with left vertebral dissection developed a large cerebellar infarct, (2) a 64-year-old man developed a left parietal infarct due to left carotid dissection and (3) a 51-year-old man developed right Horner's syndrome, fluctuating dysarthria, left facial droop, and left arm weakness due to right carotid dissection. Imaging studies and the literature are reviewed.

Author(s): 
Jeret, Joseph S.
Bluth, Mark

Pages

Subscribe to RSS - Magnetic Resonance Angiography