Peripheral artery disease restricts flow in the vessels of the lower limb and appears clinically as a shortened walking distance, rest pain, or an ischaemic wound. The clinical team manages this condition along two parallel pathways: medical risk factor management and, where indicated, endovascular revascularisation. The two pathways complement each other in the same patient; one does not replace the other.
Peripheral artery disease and clinical staging: key concepts
Assessment begins with history, vascular examination, and the resting ankle–brachial pressure index (ABPI); exercise ABPI, toe pressure, and imaging are added when needed. A resting ABPI of 0.90 or below is consistent with peripheral artery disease; where vessels are incompressible — as in diabetes or chronic kidney disease — complementary methods such as the toe–brachial index are required. Imaging is used to plan the anatomy, particularly when revascularisation is being considered.
Classifications used frequently in practice:
- Fontaine — four stages, from I (asymptomatic) to IV (ischaemic wound or gangrene).
- Rutherford — describes chronic lower limb ischaemia in categories 0 to 6 through clinical findings.
- Global Vascular Guidelines — in the assessment of chronic limb-threatening ischaemia, consider the clinical picture, the wound and infection burden, and objective perfusion measurements together.
In chronic symptomatic peripheral artery disease, structured exercise and guideline-directed medical therapy form the basic approach; where function-limiting claudication persists despite this, revascularisation can be considered alongside anatomy and patient preference. In chronic limb-threatening ischaemia — rest pain, a non-healing ischaemic wound, or gangrene — revascularisation is taken into multidisciplinary assessment without delay, with the aim of preventing limb loss. The relationship between the wound chain and perfusion is detailed in critical limb ischaemia and wounds.
The medical pathway: risk factor management
Medical therapy aims to slow the atherosclerotic process in the vessel wall and to reduce the risk of thrombotic events. In the 2024 European Society of Cardiology guideline on peripheral arterial and aortic diseases, risk factor modification is the foundation of treatment at every stage.
The main components of the medical pathway:
- Smoking cessation — the strongest modifiable factor in disease progression; recorded at clinical follow-up.
- Antithrombotic therapy — in symptomatic disease, single antiplatelet therapy is generally the base option; the place and duration of dual antiplatelet therapy, particularly after endovascular intervention, is set by the physician together with bleeding risk.
- Lipid-lowering therapy — high-intensity statin as tolerated and an individual LDL-C target form the core of cardiovascular risk reduction.
- Hypertension and diabetes control — systemic risk factors; foot examination is routine in the patient with diabetes.
- Exercise therapy — a structured walking programme in the intermittent claudication profile; it adds to medical therapy.
Medical therapy continues at every stage; peripheral artery disease is not a balloon-and-stent decision alone. The clinical team regards risk factor management as a precondition of the intervention decision. Systemic vascular health is also part of the healthspan discussion; vascular integrity is addressed at programme level in vascular health and healthy longevity and on the long and healthy life page.
The endovascular pathway: when is revascularisation considered?
Endovascular revascularisation aims to restore intravascular flow in anatomically suitable lesions. The decision is shaped by symptom severity, lesion anatomy (length, calcification, infrapopliteal segment), the distal target vessel, infection status, and patient comorbidities.
Practical decision points:
- Intermittent claudication — where medical therapy and exercise fall short and quality of life is affected, an endovascular approach in selected cases.
- Chronic limb-threatening ischaemia — rest pain, a non-healing ischaemic wound, or gangrene; urgent vascular assessment and, where suitable, revascularisation. Medical therapy continues.
- Acute ischaemia — urgent endovascular or open surgery; the pathway is urgent.
Line items used frequently in the endovascular approach are the percutaneous transluminal angioplasty (PTA) balloon, the drug-coated balloon, and the peripheral stent. In the infrapopliteal segment the vessel diameter is small and the lesion may be long and calcified; a single product type does not suit every scenario. Interventional product terminology — diameter, length, over-the-wire or rapid-exchange system, and nominal pressure — is terminology shared by the clinical team. Angioplasty product groups summarises these line items; the product scope is listed on the angioplasty page.
The order between the medical and endovascular pathways
Risk factor management continues at every stage; it is not stopped after revascularisation either. Intervention alone does not halt the atherosclerotic process. Symptoms can worsen again with restenosis or an inadequate technical result; at follow-up, symptoms, vascular examination, and — where needed — serial ABPI measurements are assessed together.
In the chronic limb-threatening ischaemia profile, the wound team and the vascular team run in parallel. While local wound care continues, infection and perfusion are assessed without delay; a change of dressing alone does not correct underlying ischaemia. Wound care product groups appear at category level on the wound care page.
Sources
- Mazzolai L, et al. 2024 ESC Guidelines for the management of peripheral arterial and aortic diseases. Eur Heart J. 2024. doi:10.1093/eurheartj/ehae179
- Gerhard-Herman MD, et al. 2016 AHA/ACC Guideline on the Management of Patients With Lower Extremity Peripheral Artery Disease. Circulation. 2017. doi:10.1161/CIR.0000000000000471
- Conte MS, et al. Global Vascular Guidelines on the Management of Chronic Limb-Threatening Ischemia. J Vasc Surg. 2019. doi:10.1016/j.jvs.2019.02.016
- Lane R, et al. Exercise for intermittent claudication. Cochrane Database Syst Rev. 2014. doi:10.1002/14651858.CD000990.pub3
- VascularVita: Angioplasty · Terminology guide · Long and healthy life · Critical limb ischaemia and the wound chain