Peripheral Artery Disease (PAD)

PAD is a chronic atherosclerotic disease affecting arteries supplying the legs (and sometimes arms). Reduced blood flow causes claudication, nonhealing wounds, and increases cardiovascular risk. Early detection and aggressive risk-factor control prevent limb loss and cardiac events.

Symptoms

• Intermittent claudication: cramping pain in calves/thighs/buttocks with walking, relieved by rest
• Rest pain (critical limb ischemia) when perfusion severely reduced
• Nonhealing ulcers, gangrene, cold/pale extremities, hair loss, diminished pulses
• Some patients asymptomatic due to low activity levels

Risk Factors

• Smoking, diabetes, hypertension, dyslipidemia
• Age > 60, male sex
• Chronic kidney disease, elevated homocysteine
• Family history, chronic inflammation

Diagnosis

• Ankle-Brachial Index (ABI): ≤ 0.90 indicates PAD
• Segmental pressures, toe-brachial index for diabetics/CKD
• Duplex ultrasound, CT angiography, MR angiography to map lesions
• Catheter-based angiography when planning interventions
• Assess for concomitant CAD/CVD risk

Treatment & Management

Risk Factor Modification

• Smoking cessation (behavioral + pharmacologic support)
• Optimize BP (<130/80), lipids (high-intensity statin ± ezetimibe/PCSK9), glucose (A1C <7%)
• Weight management, Mediterranean diet, physical activity

Medications

• Antiplatelet therapy (aspirin or clopidogrel) for all PAD patients
• Dual pathway inhibition (low-dose rivaroxaban + aspirin) in high-risk PAD if bleeding risk acceptable
• Cilostazol for claudication (contraindicated in heart failure)
• ACE inhibitors/ARBs for vascular protection

Exercise Therapy

• Supervised exercise therapy (SET) improves walking distance and symptoms
• Home-based walking programs if SET unavailable

Revascularization

• Endovascular (angioplasty, stent, atherectomy) for lifestyle-limiting claudication refractory to therapy or critical limb ischemia
• Surgical bypass for long-segment or complex lesions
• Wound care, antibiotics for ulcers, pressure off-loading

Limb Preservation

• Inspect feet daily, proper footwear
• Podiatry for nail care/calluses
• Manage neuropathy (diabetics) to prevent unnoticed injuries

Living with PAD

• Track walking distance, symptoms, ABI, medications, BP, glucose, lipids
• Adhere to walking therapy; gradually increase intensity/duration
• Coordinate with cardiology, vascular surgery, endocrinology, podiatry
• Manage stress/depression; PAD often limits independence

Complications

• Critical limb ischemia leading to amputation
• Acute limb ischemia from thrombosis/embolism
• Myocardial infarction, stroke (systemic atherosclerosis)
• Chronic wounds, infections

Research & Future Directions

Focus areas include drug-eluting devices, gene therapy for angiogenesis, cell-based perfusion repair, and AI-based perfusion monitoring.

Experimental & Emerging Treatments

• Cell Therapy (CD34+ stem cells): Aim to promote angiogenesis in ischemic limbs.
• Gene Therapy (VEGF, HGF vectors): Investigational for no-option critical limb ischemia.
• Drug-Coated Balloons/Stents with novel agents: Reduce restenosis risk.
• Wearables + AI Gait Analysis: Predict claudication onset and tailor exercise prescriptions.

Track PAD with Diagnoza.care

Walk Farther with Data – Log walking distance/time, symptoms, ABI results, medications, wound status, smoking cessation progress, and specialist visits; capture side effects; and let the AI companion flag changes that require vascular reassessment.

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Medical Disclaimer: Informational only. Work with your vascular specialist or cardiologist to confirm diagnosis, optimize medical therapy, and evaluate revascularization options. Sources: American College of Cardiology/American Heart Association, Society for Vascular Surgery, European Society of Cardiology