Left carotid steal. A new observation

Area of Science:

• Vascular Surgery
• Interventional Cardiology
• Cerebrovascular Medicine

Background:

• Subclavian artery occlusion can lead to reversed graft flow and symptomatic intracranial steal.
• Arteriosclerosis can isolate carotid systems, causing distal steal into these areas.
• Understanding steal dynamics is crucial for effective vascular reconstruction.

Purpose of the Study:

• To present two cases of vascular steal syndrome resulting from arterial occlusive disease.
• To illustrate surgical interventions for restoring normal cerebral blood flow.
• To discuss the potential role of the carotid system as a low-pressure steal area.

Main Methods:

• Case 1: Patient with left subclavian artery occlusion treated with an axilloaxillary bypass graft.
• Case 2: Patient with left carotid system isolation due to arteriosclerosis treated with a subclavian-carotid saphenous vein bypass.
• Pre- and post-operative assessment of graft patency and flow dynamics.

Main Results:

• Axilloaxillary graft successfully restored forward flow in the first patient, resolving steal symptoms.
• Saphenous vein bypass restored normal flow to the isolated left carotid system in the second patient.
• Both interventions effectively addressed the symptomatic steal phenomena.

Conclusions:

• Axilloaxillary bypass is an effective treatment for subclavian artery occlusion with steal.
• Subclavian-to-carotid bypass can successfully manage steal into isolated carotid systems.
• The carotid system can act as a low-pressure area for steal, though less common than subclavian steal.