At a glance
What it is
Peripheral artery disease (PAD) is a progressive narrowing of the arteries supplying the extremities — predominantly the lower limbs — by atherosclerotic plaque. Reduced arterial flow impairs oxygen delivery to muscles during activity and, in severe cases, at rest. PAD is a systemic disease: patients have a markedly elevated risk of myocardial infarction and stroke from concurrent coronary and cerebrovascular atherosclerosis. Peripheral vascular disease is the broader term covering both arterial and venous disease of the limb circulation.
Symptoms
Intermittent claudication: cramping, aching, or fatigue in the calf, thigh, or buttock that appears predictably after walking a fixed distance and resolves within minutes of rest. Advanced disease: rest pain (worse at night, relieved by hanging the limb over the bed), skin pallor or discolouration, hair and nail changes, poor wound healing. Critical limb ischaemia: severe rest pain, ischaemic ulcers, gangrene — at risk of limb loss without urgent treatment. Aortoiliac disease may also cause erectile dysfunction (Leriche syndrome).
Approach
Lifestyle: smoking cessation (most important single intervention), exercise programme, healthy diet. Medical: antiplatelet therapy (aspirin/clopidogrel), high-intensity statin, blood pressure and glucose control. Spinal cord stimulation: established for critical limb ischaemia not amenable to revascularisation — improves microcirculation, reduces rest pain, promotes wound healing. Revascularisation: angioplasty ± stenting or bypass surgery for disabling claudication or limb-threatening disease.
What peripheral vascular disease is
The arterial supply to the lower limbs originates from the aorta and divides into the iliac, femoral, popliteal, and tibial arteries. Atherosclerosis — the accumulation of lipid-rich plaques within the arterial wall — progressively narrows these vessels, reducing perfusion reserve. During rest, even significantly narrowed arteries can meet basal metabolic demand; during exercise, when muscles require a 5- to 10-fold increase in blood flow, stenosed arteries cannot respond and ischaemia develops — producing claudication.
**Classification by severity**
The Fontaine classification stages PAD: - *Stage I:* Asymptomatic (incidental finding on ABI or imaging) - *Stage IIa:* Mild claudication (pain after > 200 m of walking) - *Stage IIb:* Moderate/severe claudication (pain after < 200 m) - *Stage III:* Rest pain - *Stage IV:* Ulceration or gangrene (critical limb-threatening ischaemia)
**Ankle-brachial index (ABI)**
The ratio of ankle systolic blood pressure to brachial systolic pressure. A normal ABI is 1.0–1.4; values ≤ 0.9 indicate PAD; values ≤ 0.4 indicate severe disease. The ABI is the primary non-invasive diagnostic tool.
**Critical limb-threatening ischaemia**
When perfusion is insufficient to meet basal tissue demand, ischaemic rest pain develops — classically in the foot and toes, worsened by elevation and improved by hanging the leg over the bed (gravity assist). Without revascularisation or effective alternative perfusion, ulceration and gangrene develop and amputation is at risk.
**Management**
*Supervised exercise therapy:* Walking programmes to moderate pain, repeated for 30–45 minutes three times weekly, consistently improve pain-free walking distance and are recommended as first-line treatment for stable claudication.
*Cardiovascular risk reduction:* The primary cause of death in PAD patients is cardiovascular disease — myocardial infarction and stroke. Antiplatelet therapy, high-dose statin, antihypertensive treatment, and smoking cessation are essential.
*Spinal cord stimulation (SCS):* An established, evidence-based treatment for critical limb-threatening ischaemia not amenable to revascularisation. SCS improves microvascular flow, reduces rest pain and analgesic requirements, and promotes ulcer healing. The mechanism involves modulation of sympathetic vasomotor tone and release of vasodilatory neuropeptides.
*Revascularisation:* Percutaneous transluminal angioplasty (PTA) with or without stenting — endovascular; lower procedural risk but higher re-stenosis rate. Surgical bypass using vein or synthetic graft — more durable; preferred for long-segment disease or failed angioplasty. Urgently indicated for critical limb ischaemia.
Treatment options at Alimran Medical Center
Neuromodulation
Injection therapies
- Botox® injections
- Prolotherapy
- Ozone injection
- Trigger point injections
- Epidural steroid injections
Advanced therapies
Physiotherapy & rehabilitation
- Electrical stimulation
- Short and long wave therapy
- Laser therapy
- Ultrasound therapy
- Supervised walking programme and vascular rehabilitation
- Sigma
Book a consultation
The secretary schedules first appointments during clinic hours; please have prior imaging, operative notes and a current medication list available at the time of the call.
This page provides general information about peripheral vascular disease and is not a substitute for individual medical assessment. If your symptoms are severe or worsening, contact a clinician promptly.