{ "schemaVersion": 2, "eyebrow": "Vascular Neurology", "title": "Subclavian Steal Syndrome", "summary": "Evaluate suspected subclavian steal with bilateral arm pressures and vertebral-subclavian duplex, then define arch-vessel anatomy by CTA or MRA before revascularizing patients with posterior-circulation ischemia, disabling arm ischemia, coronary steal, or hemodialysis-access dysfunction.", "seoDescription": "Physician guide to diagnosing subclavian steal syndrome, excluding competing ischemic syndromes, and selecting medical therapy or revascularization.", "clinicalQuestion": "How should clinicians confirm subclavian steal syndrome and select patients for endovascular or surgical revascularization?", "specialty": "Vascular Medicine", "audience": "U.S. physicians and medical trainees", "tags": [ "subclavian steal syndrome", "vertebral artery flow reversal", "subclavian artery stenosis", "vertebrobasilar insufficiency", "coronary-subclavian steal", "subclavian revascularization" ], "keyTakeaways": [ "Reserve the diagnosis of symptomatic subclavian steal syndrome for posterior-circulation symptoms with proximal subclavian or innominate obstruction, retrograde vertebral flow, and patent vertebral and basilar arteries; flow reversal alone is a hemodynamic phenomenon. [15]", "Start with bilateral arm blood pressures, pulse examination, and duplex interrogation of the subclavian and vertebral arteries; use CTA or MRA to define proximal subclavian, vertebral, internal mammary, and aortic-arch anatomy before intervention. [13][15][22]", "Escalate urgently for suspected TIA or stroke, acute coronary syndrome in a patient with an internal mammary graft, or threatened limb ischemia rather than attributing symptoms to steal without evaluating competing vascular causes. [21][23]", "Revascularization is indicated for symptomatic cerebrovascular ischemia, coronary-subclavian steal, hemodialysis-access dysfunction, or impaired quality of life from upper-extremity ischemia; endovascular treatment is commonly favored when anatomy is suitable. [22][23]", "Treat subclavian atherosclerosis as systemic vascular disease: implement smoking cessation, blood-pressure and glycemic control, and other secondary prevention while determining whether symptoms require revascularization. [21][23]" ], "sections": [ { "id": "triage-and-clinical-phenotype", "eyebrow": "Triage", "heading": "Identify symptomatic steal and do not miss competing ischemia", "intro": "Vertebral flow reversal is not synonymous with a symptomatic cerebrovascular syndrome.", "paragraphs": [ "Treat acute focal neurologic deficits, persistent posterior-circulation symptoms, or recurrent transient neurologic episodes as possible TIA or stroke until proven otherwise. Subclavian steal can produce transient vertigo, diplopia, ataxia, dysarthria, syncope, and drop attacks, particularly when provoked by ipsilateral arm exertion or head positioning, but these symptoms are not specific for steal. [22][24]", "A patient has clinically meaningful subclavian steal syndrome when neurologic symptoms are attributable to posterior-circulation hypoperfusion and testing demonstrates marked proximal subclavian or innominate stenosis or occlusion, retrograde ipsilateral vertebral flow, and patent vertebral and basilar arteries. Isolated retrograde vertebral flow without this clinical-anatomic correlation is subclavian steal phenomenon and is often discovered incidentally. [15][21]", "In patients with prior coronary artery bypass grafting using an ipsilateral internal mammary artery, exertional angina, acute coronary syndrome, or otherwise unexplained myocardial ischemia should trigger evaluation for coronary-subclavian steal. The mechanism is reversal of flow through the internal mammary graft caused by subclavian stenosis proximal to the graft origin; reports associate this syndrome with proximal stenosis exceeding 70%. [7][9][21]" ], "bullets": [ "Escalate as an acute neurovascular evaluation for ongoing or recurrent focal neurologic deficits, rather than delaying care for outpatient vascular imaging. [22][23]", "Treat acute coronary symptoms in a patient with an internal mammary graft as possible myocardial ischemia while evaluating the proximal subclavian artery. [4][21]", "Assess for upper-extremity threatened ischemia when rest pain, digital ischemia, or finger necrosis accompanies subclavian disease. [23]" ], "subsections": [], "table": { "caption": "Clinical patterns that change the next diagnostic and therapeutic step. [15][21][23]", "columns": [ "Presentation", "Most consequential interpretation", "Next step" ], "rows": [ [ "Incidental interarm pressure difference or retrograde vertebral flow without symptoms", "Subclavian stenosis or steal phenomenon; most affected patients are asymptomatic. [21]", "Confirm anatomy if clinically needed and institute vascular risk-factor management; do not equate flow reversal with an indication for revascularization. [21][23]" ], [ "Arm-exertion dizziness, diplopia, ataxia, dysarthria, syncope, or drop attacks", "Possible symptomatic vertebrobasilar hypoperfusion, but symptoms require correlation with vertebral-flow reversal and arch-vessel anatomy. [15][22]", "Obtain duplex followed by CTA or MRA; evaluate urgent or recurrent focal deficits as TIA or stroke. [13][22][23]" ], [ "Arm claudication, fatigue, paresthesia, coldness, rest pain, or digital ischemia", "Upper-extremity arterial insufficiency from subclavian or axillary occlusive disease. [22][23]", "Define lesion anatomy and consider revascularization when symptoms impair quality of life or threaten tissue. [23]" ], [ "Angina or myocardial ischemia after internal mammary artery CABG", "Possible coronary-subclavian steal from stenosis proximal to the internal mammary origin. [9][21]", "Assess coronary ischemia and image the subclavian-internal mammary anatomy promptly; symptomatic coronary steal is an indication for revascularization. [21][23]" ] ] } }, { "id": "diagnostic-workup", "eyebrow": "Diagnosis", "heading": "Confirm flow reversal, then map the lesion before treatment", "intro": "Duplex establishes the hemodynamic pattern; cross-sectional imaging determines procedural anatomy.", "paragraphs": [ "At bedside, measure blood pressure in both arms and compare pulses, temperature, and evidence of distal ischemia. An interarm pressure difference can reveal otherwise asymptomatic subclavian stenosis, but it does not establish neurologic symptom causality or define lesion extent. [21]", "Order cervical duplex ultrasonography with Doppler assessment of both subclavian and vertebral arteries as the initial vascular test. Retrograde vertebral flow supports steal; a bidirectional vertebral waveform may occur with severe subclavian disease. Duplex can measure velocity and flow direction but may inadequately visualize the proximal subclavian artery or the full extracranial vertebral course because of bony shadowing. [13][14][16]", "Use CTA or MRA after an abnormal or equivocal duplex when symptoms could justify revascularization. These modalities provide anatomic definition of the aortic arch, diseased subclavian segment, vertebral origin, and relationship to the internal mammary artery; this distinction is particularly important before treating left-sided disease in a patient with an internal mammary graft. [13][15][18]", "Do not grade the clinical severity of subclavian obstruction solely from the degree of vertebral-flow reversal. Severe subclavian stenosis may lack typical steal waveforms when there is proximal vertebral stenosis or occlusion, vertebral hypoplasia, or contralateral subclavian disease. [14][16]" ], "bullets": [ "Add transcranial Doppler when available to evaluate intracranial flow physiology; cervical and transcranial Doppler are described as screening tools supplemented by CTA or MRA. [22]", "Use catheter angiography when detailed vascular delineation is needed for an endovascular strategy or when noninvasive imaging is discordant with the clinical syndrome. [13][15][16]", "In a patient with posterior-circulation symptoms, specifically verify vertebral and basilar artery patency before assigning symptoms to subclavian steal syndrome. [15]" ], "subsections": [ { "heading": "Etiologic interpretation", "paragraphs": [ "Atherosclerosis is the most common cause of subclavian steal syndrome and should prompt assessment of coexistent carotid, vertebral, coronary, and peripheral arterial disease. Symptoms are more likely when subclavian obstruction coexists with other aortic-arch vessel disease that limits collateral compensation. [10][21][23]", "If imaging identifies an isolated lesion but symptoms are disproportionate, reconsider competing posterior-circulation ischemia, intrinsic vertebral disease, carotid disease, cardiac ischemia, or nonvascular causes of dizziness or syncope before attributing all symptoms to steal. The diagnostic definition requires both the characteristic vascular lesion and a compatible clinical syndrome. [15][23]" ], "bullets": [] } ], "table": { "caption": "Imaging sequence for suspected subclavian steal syndrome. [13][15][16][18]", "columns": [ "Test", "Useful finding", "Limitation or decision use" ], "rows": [ [ "Bilateral arm blood pressures and pulse examination", "May identify an interarm pressure difference and ipsilateral pulse reduction associated with subclavian stenosis. [21]", "Screening examination only; does not establish vertebral-flow direction or lesion anatomy. [21]" ], [ "Duplex ultrasound of subclavian and vertebral arteries", "Measures subclavian velocity and vertebral-flow direction; retrograde vertebral flow supports steal, and bidirectional flow can occur with severe disease. [13][16]", "Proximal subclavian interrogation and the full extracranial vertebral artery may be suboptimal. [13]" ], [ "CTA or MRA of arch and neck vessels", "Defines aortic-arch anatomy and diseased segments relative to vertebral and internal mammary ostia. [13][15][18]", "Use to confirm anatomy when intervention is contemplated or duplex is limited. [13][15]" ], [ "Catheter angiography", "Provides detailed vascular anatomy and has been used as the reference standard in studies of severe subclavian stenosis. [15][16]", "Reserve for procedural planning or unresolved noninvasive imaging questions. [13][15]" ] ] } }, { "id": "medical-management", "eyebrow": "Initial Management", "heading": "Stabilize provoked symptoms and treat systemic atherosclerotic risk", "intro": "Medical management is appropriate for many asymptomatic patients and remains necessary after revascularization.", "paragraphs": [ "Until definitive assessment, advise patients with reproducible arm-exertional symptoms to avoid strenuous use of the affected extremity because arm demand can provoke vertebrobasilar symptoms or ischemic arm pain. This is a temporary symptom-prevention measure, not a substitute for urgent neurovascular assessment when focal deficits are present. [21][24]", "Institute secondary vascular prevention for subclavian atherosclerotic disease: smoking cessation, blood-pressure control, glycemic control, and lifestyle modification are specifically recommended preventive measures. Because subclavian stenosis is a marker of atherosclerosis and future myocardial ischemia or stroke risk, address cardiovascular risk even when no revascularization is planned. [21][23]", "Do not use absence of neurologic symptoms to dismiss clinically important coronary or limb consequences. Reassess for angina in patients with internal mammary grafts, for dialysis-access dysfunction in patients with ipsilateral hemodialysis access, and for functional arm limitation; each changes the threshold for revascularization. [21][23]" ], "bullets": [ "Document the symptom trigger: arm exercise or abrupt head movement strengthens the physiologic link between a proximal subclavian lesion and transient posterior-circulation symptoms. [24]", "At follow-up, reassess neurologic events, exertional arm symptoms, myocardial ischemic symptoms in internal mammary graft recipients, and access function in dialysis patients. [21][23]", "Refer symptomatic patients for vascular evaluation after cross-sectional anatomic definition, particularly when symptoms affect safety, tissue viability, myocardial perfusion, access function, or quality of life. [22][23]" ], "subsections": [], "table": { "caption": "Clinical circumstances supporting revascularization consideration. [23]", "columns": [ "Clinical circumstance", "Rationale for intervention" ], "rows": [ [ "Symptoms or signs of TIA or stroke attributable to subclavian steal", "Symptomatic cerebrovascular ischemia is a revascularization indication. [23]" ], [ "Coronary-subclavian steal syndrome", "Proximal subclavian obstruction can reverse internal mammary graft flow and cause myocardial ischemia. [21][23]" ], [ "Ipsilateral hemodialysis-access dysfunction", "Access dysfunction is a listed indication for revascularization. [23]" ], [ "Arm ischemia causing impaired quality of life", "Arm claudication, fatigue, pain, or other functional limitation can justify revascularization when clinically significant. [22][23]" ], [ "Asymptomatic patient planned for CABG using an internal mammary artery", "Revascularization should be considered before planned internal mammary artery CABG. [23]" ] ] } }, { "id": "revascularization", "eyebrow": "Definitive Treatment", "heading": "Select endovascular or surgical revascularization by symptoms and anatomy", "intro": "The procedural objective is restoration of antegrade perfusion to the subclavian distribution and its dependent territories.", "paragraphs": [ "Offer revascularization to patients with symptomatically important posterior-circulation ischemia, coronary-subclavian steal, dialysis-access dysfunction, or quality-of-life-limiting upper-extremity ischemia after anatomic confirmation. In the symptomatic population, percutaneous modalities are commonly used first line because endovascular techniques have changed practice and are associated with lower morbidity, mortality, and cost in reported reviews; comparative long-term randomized evidence remains limited. [22][23]", "Use CTA, MRA, or catheter angiography to determine lesion location relative to the vertebral and internal mammary origins before choosing angioplasty and stenting versus surgical reconstruction. Atherosclerotic disease is usually proximal, and the procedure must restore inflow without compromising vertebral or internal mammary circulation. [2][13][15]", "Surgical revascularization remains an option when lesion anatomy is unsuitable for endovascular treatment or when a durable reconstruction is required. Case-based literature reports improvement in chronic vertebrobasilar insufficiency after surgical treatment, but treatment selection should be individualized to lesion anatomy, prior interventions, and the affected vascular territory. [12][22]" ], "bullets": [ "For coronary-subclavian steal, define the proximal subclavian lesion and internal mammary graft relationship before intervention; myocardial ischemia is the clinical target, not vertebral-flow reversal alone. [9][13][21]", "For neurologic presentations, confirm that posterior-circulation symptoms correlate with the steal anatomy and that vertebral and basilar arteries are patent. [15]", "After revascularization, monitor recurrence of exertional neurologic symptoms, arm ischemia, angina in internal mammary graft recipients, and dialysis-access dysfunction. [21][23]" ], "subsections": [ { "heading": "When not to intervene immediately", "paragraphs": [ "Most subclavian stenosis and steal phenomena are asymptomatic because collateral circulation develops. In an asymptomatic patient without a planned internal mammary artery CABG or another specific indication, prioritize cardiovascular risk reduction and clinical surveillance rather than revascularizing an imaging finding alone. [21][23][24]" ], "bullets": [] } ], "table": { "caption": "Procedure-selection framework for symptomatic disease. [13][22][23]", "columns": [ "Decision point", "Implication" ], "rows": [ [ "Symptoms meet a revascularization indication and duplex suggests steal", "Obtain CTA or MRA to map the arch, subclavian lesion, vertebral origin, and internal mammary relationship before choosing treatment. [13][15][23]" ], [ "Anatomy is suitable for percutaneous treatment", "Endovascular revascularization is commonly favored as a first-line approach in symptomatic subclavian steal syndrome. [22]" ], [ "Anatomy is unsuitable for endovascular treatment or a surgical reconstruction is selected", "Use surgical revascularization; reported cases describe improvement in chronic vertebrobasilar insufficiency after surgery. [12][22]" ], [ "No symptom-based indication, no planned internal mammary CABG", "Avoid intervention based on vertebral-flow reversal alone; provide vascular risk-factor management. 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Verify recommendations against current guidance and patient-specific factors.", "citations": [ { "number": 1, "title": "Posterior circulation ischaemic stroke and transient ...", "detail": "www.thelancet.com", "url": "https://www.thelancet.com/journals/laneur/article/PIIS1474-4422(13)70211-4/abstract", "authors": "www.thelancet.com", "host": "www.thelancet.com", "snippet": "by HS Markus · 2013 · Cited by 294 — A review of subclavian steal syndrome with clinical correlation Med Sci Monit. Vertebrobasilar ischaemia Q J Med.", "score": 0.6780931 }, { "number": 2, "title": "Proximal Extracranial Vertebral Artery Disease in the New ...", "detail": "jamanetwork.com", "url": "https://jamanetwork.com/journals/jamaneurology/fullarticle/773717", "authors": "jamanetwork.com", "host": "jamanetwork.com", "snippet": "by RJ Wityk · 1998 · Cited by 389 — Plaque formation often begins in the subclavian artery. The subclavian steal syndrome: a common vascular disorder with rare neurologic deficits. evaluation of", "score": 0.3362008 }, { "number": 3, "title": "Large-Vessel Arterial Occlusive Disease in Symptomatic ...", "detail": "jamanetwork.com", "url": "https://jamanetwork.com/journals/jamasurgery/fullarticle/590701", "authors": "jamanetwork.com", "host": "jamanetwork.com", "snippet": "by RW Harris · 1984 · Cited by 41 — Subclavian and axillary artery occlusive disease resulted in sufficient upper extremity symptoms to necessitate 30 vascular reconstructions in 28.", "score": 0.16482572 }, { "number": 4, "title": "AN UNUSUAL CAUSE OF ACUTE CORONARY SYNDROME", "detail": "www.jacc.org", "url": "https://www.jacc.org/doi/10.1016/S0735-1097%2822%2903270-3", "authors": "www.jacc.org", "host": "www.jacc.org", "snippet": "Subclavian steal syndrome (SSS) is an uncommon cause of coronary ischemia in patients who have undergone CABG using the IMA. atherosclerotic", "score": 0.59089786 }, { "number": 5, "title": "Subclavian Artery Stenosis: Prevalence, Risk Factors, and Association With Cardiovascular Diseases", "detail": "www.jacc.org", "url": "https://www.jacc.org/doi/abs/10.1016/j.jacc.2004.04.044", "authors": "www.jacc.org", "host": "www.jacc.org", "snippet": "Pei Zhou, Ru‐Yi Luo, A Case of Reduced Pulse Pressure Following Aortic Valve Replacement: A Pitfall of Proximal Subclavian Artery Occlusion, Clinical Case Reports, 10.1002/ccr3.72130, 14, 2, (2026).Crossref \n Michał Jaśkiewicz, Jacek Budzyński, Coronary subclavian steal syndrome, Acta Elbingensia,", "score": 0.39277983 }, { "number": 6, "title": "CORONARY ARTERY VARIANT OF SUBCLAVIAN STEAL ...", "detail": "www.jacc.org", "url": "https://www.jacc.org/doi/10.1016/S0735-1097%2823%2904243-2", "authors": "www.jacc.org", "host": "www.jacc.org", "snippet": "by MS Mohamed · 2023 — The main etiology is atherosclerosis. CSSS incidence is increasing due to the increasing life expectancy of patients undergoing CABG. Case. 65", "score": 0.36330852 }, { "number": 7, "title": "CORONARY ARTERY SUBCLAVIAN STEAL SYNDROME ...", "detail": "www.jacc.org", "url": "https://www.jacc.org/doi/10.1016/S0735-1097%2819%2933349-2", "authors": "www.jacc.org", "host": "www.jacc.org", "snippet": "Coronary artery subclavian steal syndrome has an incidence of 0.2-0.7%. it results from >70% stenosis of the proximal subclavian artery, most", "score": 0.34946668 }, { "number": 8, "title": "A Case of Bilateral Subclavian Artery Stenosis Presenting ...", "detail": "www.acpjournals.org", "url": "https://www.acpjournals.org/doi/10.7326/aimcc.2022.0785", "authors": "www.acpjournals.org", "host": "www.acpjournals.org", "snippet": "When the stenosis becomes severe, it can cause subclavian steal syndrome (2). The term “subclavian steal” refers to a phenomenon of flow", "score": 0.3028759 }, { "number": 9, "title": "A Case Report of Coronary‐Subclavian Steal Syndrome ...", "detail": "onlinelibrary.wiley.com", "url": "https://onlinelibrary.wiley.com/doi/10.1155/2009/687982", "authors": "onlinelibrary.wiley.com", "host": "onlinelibrary.wiley.com", "snippet": "Coronary-subclavian steal syndrome results from atherosclerotic disease of the proximal subclavian artery causing reversal of flow in an", "score": 0.5112048 }, { "number": 10, "title": "Bilateral Subclavian Steal Syndrome - Amini - 2011", "detail": "onlinelibrary.wiley.com", "url": "https://onlinelibrary.wiley.com/doi/10.1155/2011/146267", "authors": "onlinelibrary.wiley.com", "host": "onlinelibrary.wiley.com", "snippet": "Atherosclerosis is the most common cause of subclavian steal syndrome. Due to acute origin of left subclavian artery resulting in accelerated", "score": 0.4877716 }, { "number": 11, "title": "Subclavian Steal Syndrome with or without Arterial ...", "detail": "onlinelibrary.wiley.com", "url": "https://onlinelibrary.wiley.com/doi/10.1111/jon.12371", "authors": "onlinelibrary.wiley.com", "host": "onlinelibrary.wiley.com", "snippet": "Jun 14, 2016 — The subclavian-vertebral artery steal syndrome (SSS) is the hemodynamic phenomenon of blood flow reversal in the vertebral artery due to ...Read more", "score": 0.42763633 }, { "number": 12, "title": "Chronic vertebrobasilar insufficiency in subclavian steal ...", "detail": "onlinelibrary.wiley.com", "url": "https://onlinelibrary.wiley.com/doi/full/10.1002/ccr3.3891", "authors": "onlinelibrary.wiley.com", "host": "onlinelibrary.wiley.com", "snippet": "by S Phillips · 2021 · Cited by 2 — We present an unusual case of subclavian steal syndrome presenting with chronic vertebrobasilar insufficiency that improved after surgical ...Read more", "score": 0.38894346 }, { "number": 13, "title": "Subclavian Steal Syndrome - an overview", "detail": "www.sciencedirect.com", "url": "https://www.sciencedirect.com/topics/nursing-and-health-professions/subclavian-steal-syndrome", "authors": "www.sciencedirect.com", "host": "www.sciencedirect.com", "snippet": "On duplex ultrasound (DUS), high-grade vertebral artery stenosis can result in a bidirectional flow pattern. Flow reversal pattern in the vertebral artery waveform and low resistance waveform in the subclavian artery are characteristic of vertebral subclavian steal syndrome. Due to shadowing from th", "score": 0.7992077 }, { "number": 14, "title": "Duplex Ultrasonography of Vertebral and Subclavian Arteries - ScienceDirect", "detail": "www.sciencedirect.com", "url": "https://www.sciencedirect.com/science/article/abs/pii/S0894731705005274", "authors": "www.sciencedirect.com", "host": "www.sciencedirect.com", "snippet": "# Review article Duplex Ultrasonography of Vertebral and Subclavian Arteries. Duplex ultrasonography of the vertebral artery is an integral part of extracranial cerebrovascular screening and provides noninvasive diagnostic clues for subclavian or vertebral artery stenosis. This review describes tech", "score": 0.75027883 }, { "number": 15, "title": "Coronary Subclavian Steal Syndrome - an overview", "detail": "www.sciencedirect.com", "url": "https://www.sciencedirect.com/topics/medicine-and-dentistry/coronary-subclavian-steal-syndrome", "authors": "www.sciencedirect.com", "host": "www.sciencedirect.com", "snippet": "DUS is an inexpensive and useful method of evaluating S/IA stenosis. The subclavian artery can be visualized on ultrasound; additionally, Doppler can measure velocities and direction of flow in the subclavian artery as well as the vertebral artery, therefore providing information about the underlyin", "score": 0.7471924 }, { "number": 16, "title": "Evaluation of Severe Subclavian Artery Stenosis by Color Doppler Flow Imaging - ScienceDirect", "detail": "www.sciencedirect.com", "url": "https://www.sciencedirect.com/science/article/abs/pii/S0301562910006666", "authors": "www.sciencedirect.com", "host": "www.sciencedirect.com", "snippet": "# Original Contribution Evaluation of Severe Subclavian Artery Stenosis by Color Doppler Flow Imaging. This study evaluates the diagnostic value of the hemodynamic parameters of color Doppler flow imaging (CDFI) for severe (70 to 99%) subclavian artery stenosis (SAS) using digital subtraction angiog", "score": 0.6897452 }, { "number": 17, "title": "Sonographic Examination of the Carotid Arteries", "detail": "pubs.rsna.org", "url": "https://pubs.rsna.org/doi/abs/10.1148/rg.256045013", "authors": "pubs.rsna.org", "host": "pubs.rsna.org", "snippet": "by HR Tahmasebpour · 2005 · Cited by 275 — the presence of a subclavian steal. PSV = peak systolic velocity, vertebral artery. The PSV reading in the ICA is 229 cm/sec, Occult and", "score": 0.6350646 }, { "number": 18, "title": "The role of magnetic resonance angiography in the diagnosis of subclavian steal - PubMed", "detail": "www.ncbi.nlm.nih.gov", "url": "https://www.ncbi.nlm.nih.gov/pubmed/7774001", "authors": "www.ncbi.nlm.nih.gov", "host": "www.ncbi.nlm.nih.gov", "snippet": "Title: The role of magnetic resonance angiography in the diagnosis of subclavian steal - PubMed\nAn official website of the United States government. **The .gov means it’s official.**. Federal government websites often end in .gov or .mil. sharing sensitive information, make sure you’re on a federal.", "score": 0.62906903 }, { "number": 19, "title": "Subclavian Steal Syndrome: Diagnosis with Perfusion ...", "detail": "pubs.rsna.org", "url": "https://pubs.rsna.org/doi/abs/10.1148/radiol.2353040710", "authors": "pubs.rsna.org", "host": "pubs.rsna.org", "snippet": "by C Wu · 2005 · Cited by 39 — The roles of MR angiography, CT angiography, and sonography in vascular imaging of the head and neck. enhanced MR angiography and digital subtraction", "score": 0.5274388 }, { "number": 20, "title": "US of Neurovascular Occlusive Disease", "detail": "pubs.rsna.org", "url": "https://pubs.rsna.org/doi/abs/10.1148/radiographics.22.5.g02se141165", "authors": "pubs.rsna.org", "host": "pubs.rsna.org", "snippet": "by JM Romero · 2002 · Cited by 34 — The result is increased subclavian steal. (c) Follow-up pulsed wave Doppler spectrum obtained 1 year after b shows partial reversal of vertebral artery flow.", "score": 0.4784076 }, { "number": 21, "title": "Subclavian Steal Syndrome - StatPearls - NCBI Bookshelf", "detail": "www.ncbi.nlm.nih.gov", "url": "https://www.ncbi.nlm.nih.gov/books/NBK554599", "authors": "www.ncbi.nlm.nih.gov", "host": "www.ncbi.nlm.nih.gov", "snippet": "## Complications\n\nThere are no long-term complications reported from subclavian steal syndrome by itself. But as it can lead to vertebrobasilar insufficiency, patients who present with syncope can experience falls, leading to the risk of head injury. In coronary-subclavian steal, reversal of blood f", "score": 0.83710164 }, { "number": 22, "title": "Symptomatic subclavian steal syndrome: Report of four Moroccan cases and literature review", "detail": "pmc.ncbi.nlm.nih.gov", "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC8318908", "authors": "pmc.ncbi.nlm.nih.gov", "host": "pmc.ncbi.nlm.nih.gov", "snippet": "Clinically it manifests by symptoms of vertebrobasilar insufficiency, ischemic symptoms of the upper limbs and recurrent angina, especially in patients who have undergone coronary bypass surgery with the internal mammary artery.\n\nIn the absence of associated lesions of other cerebral arteries, this ", "score": 0.83225065 }, { "number": 23, "title": "Subclavian Artery Stenosis - StatPearls - NCBI Bookshelf", "detail": "www.ncbi.nlm.nih.gov", "url": "https://www.ncbi.nlm.nih.gov/sites/books/NBK470221", "authors": "www.ncbi.nlm.nih.gov", "host": "www.ncbi.nlm.nih.gov", "snippet": "The left subclavian artery is more likely to be affected than the right or innominate arteries. If the stenosis is isolated, the likelihood of symptoms is lower than in other vascular beds; however, if the obstructive disease involves other aortic arch vessels, such as the carotid or vertebral arter", "score": 0.7336813 }, { "number": 24, "title": "Subclavian steal syndrome: a case study of diagnosis, management, and successful surgical resolution", "detail": "pmc.ncbi.nlm.nih.gov", "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC11068443", "authors": "pmc.ncbi.nlm.nih.gov", "host": "pmc.ncbi.nlm.nih.gov", "snippet": "## . Most patients are asymptomatic due to developing collateral circulation . However, it may manifest with arterial insufficiency affecting the upper limb (paresthesia, weakness, and claudication), the brain (vertigo, dizziness, diplopia, ataxia, dysarthria, slurred speech, and syncopal episodes) ", "score": 0.7016523 } ], "publishedAt": "2026-08-24T17:18:22.385930+00:00", "updatedAt": "2026-08-24T17:18:22.385930+00:00", "readingMinutes": 6, "slug": "subclavian-steal-syndrome" }