Subclavian Artery Stenosis and Steal Syndrome Management

Subclavian artery stenosis arises when atherosclerotic plaque or occlusive disease narrows the lumen of the subclavian artery, compromising blood flow to the upper limb and, in severe cases, inducing a reversal of vertebral artery flow known as steal syndrome. Patients may present with arm claudication, inter-arm blood pressure discrepancy and, when vertebrobasilar circulation is affected, dizziness or neurological symptoms. Management spans non-invasive imaging for diagnosis, endovascular revascularisation via angioplasty and stenting, and surgical bypass in complex or recurrent cases. Advances in catheter design, embolic protection and intravascular imaging have improved procedural safety and long-term patency, while refinements in duplex ultrasound thresholds have enhanced non-invasive detection. Multidisciplinary teams now tailor interventions according to lesion location, patient comorbidities and symptom burden, achieving high technical success with low complication rates and durable relief of ischaemic symptoms.

Research from Nature Portfolio

Recent studies have evaluated percutaneous endovascular angioplasty with optional stenting in patients with severe subclavian stenosis (≥70%) or chronic occlusion. In a cohort of over 200 individuals, angioplasty was successfully completed in all cases, with balloon-expandable stents deployed in the majority and self-expandable devices used selectively. Periprocedural complications were rare (<2%), and six- to twelve-month follow-up revealed low rates of restenosis. This work demonstrates that endovascular therapy is both safe and efficient for managing high-grade stenosis and total occlusions of the subclavian artery, reinforcing endovascular intervention as first-line treatment in low-risk patients.

Subclavian Artery Stenosis and Steal Syndrome Management publication trend

The graph below shows the total number of articles in subclavian artery stenosis and steal syndrome management across all publications each year (not limited to Nature Index journals).

Technical terms

Percutaneous endovascular angioplasty (PEA): A minimally invasive procedure to dilate a narrowed artery using a balloon catheter, often followed by stent placement.

Subclavian steal syndrome: A haemodynamic phenomenon in which proximal subclavian artery stenosis causes retrograde flow in the vertebral artery, diverting blood from the posterior cerebral circulation.

Peak systolic velocity (PSV): The maximum blood flow speed during systole measured by Doppler ultrasound, used to assess stenotic severity.

Completely reversed flow (CRF): A Doppler waveform signifying full reversal of blood direction in the vertebral artery, indicative of proximal subclavian occlusion or high-grade stenosis.

References

1. Effects of percutaneous endovascular angioplasty for severe stenosis or occlusion of subclavian artery. Scientific Reports (2024).
2. Color Doppler Ultrasonography for the Evaluation of Subclavian Artery Stenosis. Frontiers in Neurology (2022).
3. Subclavian Artery Calcification: A Narrative Review. Cureus (2022).
4. Subtypes of the Completely Reversed Flow Waveform in Vertebral Artery Can Help to Differentiate Subclavian Artery Occlusion from Severe Stenosis. Diagnostics (2023).