Biomaterial Database

Time-resolved, contrast-enhanced 3D MR angiography in the subclavian steal effect. 2010

R Schubert

Radiologie am Europacenter Berlin, Germany. dr.schubert@mvz-radiologie.de

The subclavian steal effect indicates atherosclerotic disease of the supraaortic vessels but rarely causes cerebrovascular events in itself. Noninvasive imaging providing detailed anatomic as well as hemodynamic information would therefore be desirable. From a group of 25 consecutive patients referred for MR angiography, four with absent or highly attenuated signal in one of the vertebral arteries on 3D multislab time-of-flight MR angiography were selected to undergo 3D time-resolved contrast-enhanced MR angiography. The time-resolved 3D contrast series (source images and MIPs) were evaluated visually and by graphic analysis of time-intensity curves derived from the respective V1 and V3 segments of both vertebral arteries on the source images. In two cases with high-grade proximal left subclavian stenosis, time-resolved 3D ce-MRA was able to visualise retrograde contrast filling of the left VA. There was a marked delay in time-to-peak between the left and right V1 segments in one case and a shallower slope of enhancement in another. In the other two cases, there was complete or collateralised segmental occlusion of the VAs.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D003287	Contrast Media	Substances used to allow enhanced visualization of tissues.	Radiopaque Media,Contrast Agent,Contrast Agents,Contrast Material,Contrast Materials,Radiocontrast Agent,Radiocontrast Agents,Radiocontrast Media,Agent, Contrast,Agent, Radiocontrast,Agents, Contrast,Agents, Radiocontrast,Material, Contrast,Materials, Contrast,Media, Contrast,Media, Radiocontrast,Media, Radiopaque
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013348	Subclavian Artery	Artery arising from the brachiocephalic trunk on the right side and from the arch of the aorta on the left side. It distributes to the neck, thoracic wall, spinal cord, brain, meninges, and upper limb.	Arteries, Subclavian,Artery, Subclavian,Subclavian Arteries
D013349	Subclavian Steal Syndrome	A clinically significant reduction in blood supply to the BRAIN STEM and CEREBELLUM (i.e., VERTEBROBASILAR INSUFFICIENCY) resulting from reversal of blood flow through the VERTEBRAL ARTERY from occlusion or stenosis of the proximal subclavian or brachiocephalic artery. Common symptoms include VERTIGO; SYNCOPE; and INTERMITTENT CLAUDICATION of the involved upper extremity. Subclavian steal may also occur in asymptomatic individuals. (From J Cardiovasc Surg 1994;35(1):11-4; Acta Neurol Scand 1994;90(3):174-8)	Basilar Steal Syndrome,Brachial-Basilar Insufficiency Syndrome,Subclavian Artery Stenosis,Subclavian Steal,Subclavian Steal Phenomenon,Subclavian-Carotid Artery Steal Syndrome,Artery Stenoses, Subclavian,Artery Stenosis, Subclavian,Basilar Steal Syndromes,Brachial Basilar Insufficiency Syndrome,Brachial-Basilar Insufficiency Syndromes,Insufficiency Syndrome, Brachial-Basilar,Insufficiency Syndromes, Brachial-Basilar,Phenomenon, Subclavian Steal,Steal Phenomenon, Subclavian,Steal Syndrome, Basilar,Steal Syndrome, Subclavian,Steal Syndromes, Basilar,Steal Syndromes, Subclavian,Steal, Subclavian,Stenoses, Subclavian Artery,Stenosis, Subclavian Artery,Subclavian Artery Stenoses,Subclavian Carotid Artery Steal Syndrome,Subclavian Steal Syndromes,Syndrome, Brachial-Basilar Insufficiency,Syndromes, Brachial-Basilar Insufficiency
D014711	Vertebral Artery	The first branch of the SUBCLAVIAN ARTERY with distribution to muscles of the NECK; VERTEBRAE; SPINAL CORD; CEREBELLUM; and interior of the CEREBRUM.	Vertebral Arteries,Arteries, Vertebral,Artery, Vertebral
D016893	Carotid Stenosis	Narrowing or stricture of any part of the CAROTID ARTERIES, most often due to atherosclerotic plaque formation. Ulcerations may form in atherosclerotic plaques and induce THROMBUS formation. Platelet or cholesterol emboli may arise from stenotic carotid lesions and induce a TRANSIENT ISCHEMIC ATTACK; CEREBROVASCULAR ACCIDENT; or temporary blindness (AMAUROSIS FUGAX). (From Adams et al., Principles of Neurology, 6th ed, pp 822-3)	Carotid Artery Narrowing,Carotid Ulcer,Carotid Artery Plaque,Carotid Artery Stenosis,Carotid Artery Ulcerating Plaque,Common Carotid Artery Stenosis,External Carotid Artery Stenosis,Internal Carotid Artery Stenosis,Plaque, Ulcerating, Carotid Artery,Stenosis, Common Carotid Artery,Stenosis, External Carotid Artery,Ulcerating Plaque, Carotid Artery,Artery Narrowing, Carotid,Artery Narrowings, Carotid,Artery Plaque, Carotid,Artery Plaques, Carotid,Artery Stenoses, Carotid,Artery Stenosis, Carotid,Carotid Artery Narrowings,Carotid Artery Plaques,Carotid Artery Stenoses,Carotid Stenoses,Carotid Ulcers,Narrowing, Carotid Artery,Narrowings, Carotid Artery,Plaque, Carotid Artery,Plaques, Carotid Artery,Stenoses, Carotid,Stenoses, Carotid Artery,Stenosis, Carotid,Stenosis, Carotid Artery,Ulcer, Carotid,Ulcers, Carotid
D050197	Atherosclerosis	A thickening and loss of elasticity of the walls of ARTERIES that occurs with formation of ATHEROSCLEROTIC PLAQUES within the ARTERIAL INTIMA.	Atherogenesis,Atherogeneses,Atheroscleroses