Peripheral Vascular Disease Notes With MCQs Practice

PERIPHERAL VASCULAR DISEASE (PVD)

Adult Health Nursing | Cardiovascular Disorders | NORCET 12

Detailed notes on peripheral arterial disease, chronic venous disease, clinical parameters, diagnosis, nursing management, diagrams and an interactive 25-question MCQ test.

2024 PAD Guideline ABI & TBI Acute Limb Ischemia Venous Disorders 30-Minute Test

Learning Objectives

• Differentiate arterial and venous vascular disorders.
• Recognize peripheral arterial disease (PAD), intermittent claudication and chronic limb-threatening ischemia.
• Interpret ankle-brachial index (ABI) and toe-brachial index (TBI).
• Recognize acute limb ischemia and its emergency warning signs.
• Explain chronic venous insufficiency, varicose veins and venous ulcers.
• Understand current evidence-based management and nursing priorities.

Table of Contents

1. Definition and Classification
2. Peripheral Circulation Diagram
3. Risk Factors and Pathophysiology
4. Peripheral Arterial Disease
5. Chronic Venous Disease
6. Arterial vs Venous Disease
7. Latest ABI and TBI Parameters
8. Diagnostic Investigations
9. Acute Limb Ischemia: 6 Ps
10. Medical and Surgical Management
11. Nursing Management
12. Arterial and Venous Ulcers
13. Prevention and Patient Education
14. Important Clinical Parameters
15. Mnemonics and Quick Revision
16. 25 Interactive MCQs
17. Guideline References

1. Definition and Classification

Peripheral vascular disease (PVD) is a broad term describing disorders of blood vessels outside the heart and brain. In many clinical contexts, PVD refers particularly to disorders of the arteries and veins supplying or draining the limbs.

Peripheral artery disease (PAD) specifically refers to arterial disease, most commonly atherosclerotic narrowing or obstruction of the arteries supplying the lower extremities.

Exam distinction: PAD is an arterial disorder. Chronic venous insufficiency is a venous disorder. Although both may cause leg discomfort and skin changes, their underlying mechanisms and management differ.

Major categories

Disorder	Main problem	Typical consequence
Peripheral arterial disease	Reduced arterial blood supply	Claudication, ischemic rest pain, nonhealing wounds
Acute limb ischemia	Sudden reduction in limb perfusion	Rapidly threatened limb; vascular emergency
Chronic venous insufficiency	Venous hypertension due to reflux or obstruction	Edema, skin changes, venous ulceration
Varicose veins	Dilated, tortuous superficial veins	Aching, heaviness, swelling and sometimes skin changes
Deep vein thrombosis	Thrombus in a deep vein	Swelling and risk of pulmonary embolism
Raynaud phenomenon	Episodic vasospasm, often in fingers	Color changes triggered by cold or stress

2. Peripheral Circulation Diagram

Schematic illustration for learning; not an anatomical drawing.

3. Risk Factors and Pathophysiology

Major risk factors for PAD

• Smoking and tobacco exposure.
• Diabetes mellitus.
• Hypertension.
• Dyslipidemia.
• Chronic kidney disease.
• Increasing age.
• Established atherosclerotic disease, including coronary or cerebrovascular disease.
• Family history and other individual cardiovascular risk factors.

Pathophysiology of arterial disease

1. Endothelial dysfunction and lipid deposition contribute to atherosclerotic plaque formation.
2. Plaque growth narrows the arterial lumen and reduces blood flow reserve.
3. During exercise, oxygen demand increases but arterial supply cannot adequately increase.
4. Muscle ischemia produces exertional pain called intermittent claudication.
5. Severe disease may cause rest pain, nonhealing wounds, gangrene or limb loss.

Pathophysiology of chronic venous disease

1. Venous valve dysfunction, venous obstruction or impaired calf-muscle pump function reduces effective venous return.
2. Venous pressure increases, especially while standing.
3. Fluid leaks into surrounding tissue, producing edema.
4. Chronic inflammation and skin changes can lead to pigmentation, eczema, lipodermatosclerosis and ulceration.

Risk-factor memory: Smoking and diabetes are particularly important modifiable risk factors for PAD. Assess cardiovascular risk in all patients with established PAD because the disease is associated with myocardial infarction, stroke and cardiovascular death.

4. Peripheral Arterial Disease (PAD)

Clinical presentations

The 2024 ACC/AHA multisociety guideline groups lower-extremity PAD into four major clinical subsets:

1. Asymptomatic PAD: objectively confirmed disease without recognized typical symptoms; functional limitation may still be present.
2. Chronic symptomatic PAD: exertional leg symptoms, including classic intermittent claudication.
3. Chronic limb-threatening ischemia (CLTI): advanced PAD associated with ischemic rest pain, nonhealing wounds or gangrene, usually lasting more than two weeks.
4. Acute limb ischemia (ALI): sudden reduction in limb perfusion, generally with symptoms of less than two weeks' duration.

Intermittent claudication

Intermittent claudication is reproducible discomfort, aching, cramping or fatigue in a muscle group during walking or exertion that improves with rest.

• Calf pain may suggest femoropopliteal disease.
• Buttock or thigh discomfort may occur with more proximal aortoiliac disease.
• Symptoms typically occur at a predictable exercise distance, although severity varies.

Advanced ischemia

• Ischemic rest pain, often involving the forefoot or toes.
• Pain may worsen when the leg is elevated and may improve when the foot is dependent.
• Nonhealing wounds or ulcers.
• Gangrene or tissue loss.
• Reduced or absent distal pulses, cool skin and delayed capillary refill may be present.

Urgent referral: New rest pain, a nonhealing foot wound, black tissue or gangrene requires prompt vascular assessment. Sudden pain, coldness, numbness, weakness or loss of pulse suggests acute limb ischemia and is an emergency.

5. Chronic Venous Disease

Chronic venous insufficiency (CVI)

CVI results from venous reflux, obstruction or failure of the calf-muscle pump, causing elevated venous pressure in the lower extremities.

Clinical manifestations

• Dependent ankle or lower-leg edema.
• Heaviness, aching or fatigue, often worse after prolonged standing.
• Symptoms may improve with leg elevation.
• Brown pigmentation around the lower leg, particularly near the medial ankle.
• Venous eczema, itching and lipodermatosclerosis.
• Superficial varicose veins.
• Venous ulcers, commonly around the medial gaiter region.

Varicose veins

Varicose veins are enlarged, tortuous superficial veins, commonly associated with venous valve dysfunction. Symptoms can include aching, heaviness, itching, swelling and cosmetic concerns.

Management principles

• Encourage walking and calf-muscle activity when appropriate.
• Elevate the legs for symptom relief when suitable.
• Consider compression therapy after assessing arterial circulation and other contraindications.
• Use skin care and appropriate wound management for venous eczema and ulcers.
• Consider duplex ultrasound and specialist evaluation when intervention is indicated.

Compression safety: Do not automatically apply strong compression to every patient with leg edema or a venous ulcer. Assess arterial perfusion first, especially in diabetes, suspected PAD, nonpalpable pulses or ischemic wounds. The appropriate compression level depends on clinical assessment and local protocol.

6. Arterial vs Venous Disease

Feature	Arterial insufficiency	Venous insufficiency
Basic problem	Reduced arterial inflow	Impaired venous return or reflux
Pain	Claudication; rest pain in severe disease	Aching or heaviness, often worse after standing
Temperature	Often cool	May be normal or warm
Pulse	May be diminished or absent	Usually preserved unless coexisting arterial disease
Edema	Often absent unless another condition coexists	Common, especially dependent edema
Skin	Shiny, thin, hair loss; may be pale or cyanotic	Brown pigmentation, eczema, thickened skin
Ulcer site	Toes, foot edges, pressure points	Usually gaiter region near medial ankle
Ulcer appearance	Often deep, punched-out, painful	Often shallow, irregular, exudative
Leg positioning	Elevation may worsen ischemic pain	Elevation often reduces edema and aching
Main management focus	Restore arterial perfusion and reduce cardiovascular risk	Improve venous return, manage reflux, compression if safe

Clinical caution: These are typical patterns, not absolute rules. Arterial and venous disease can coexist. An ulcer's appearance alone cannot reliably establish the diagnosis.

7. Latest ABI and TBI Parameters

The ankle-brachial index (ABI) compares ankle systolic blood pressure with brachial systolic blood pressure. It is a first-line physiological test for suspected lower-extremity PAD.

ABI calculation

ABI = Higher ankle systolic pressure in the tested leg ÷ Higher brachial systolic pressure

2024 ACC/AHA ABI interpretation

ABI value	Classification	Interpretation
≤0.90	Abnormal	Supports diagnosis of PAD
0.91–0.99	Borderline	May require additional physiological testing if symptoms suggest PAD
1.00–1.40	Normal	PAD is less likely, but further evaluation may be needed if symptoms persist
>1.40	Noncompressible	Arteries may be stiff or calcified; use toe pressure/TBI with waveforms when appropriate

NORCET memory: ABI of 0.90 or less is abnormal. ABI greater than 1.40 is not necessarily reassuring; noncompressible arteries may produce falsely high readings, particularly in diabetes and chronic kidney disease.

Toe-brachial index (TBI)

TBI = toe systolic pressure ÷ higher brachial systolic pressure.

• TBI ≤0.70: abnormal and supports PAD in the appropriate clinical context.
• TBI is particularly useful when ABI is greater than 1.40 or ankle arteries are noncompressible.
• Toe pressure, waveforms, transcutaneous oxygen pressure and skin perfusion pressure may help assess patients with suspected chronic limb-threatening ischemia.

Example calculation

Higher ankle pressure = 90 mmHg. Higher brachial pressure = 120 mmHg.

ABI = 90 ÷ 120 = 0.75, an abnormal result supporting PAD.

8. Diagnostic Investigations

Investigation	Purpose	Key point
History and physical examination	Identify exertional pain, rest pain, wounds, temperature changes and pulse abnormalities	Assess both limbs and cardiovascular risk factors
Resting ABI	Initial physiological test for PAD	Interpret using the 2024 categories above
Exercise ABI	Evaluate exertional symptoms when resting ABI is normal or borderline	Performed according to a validated laboratory protocol
TBI and toe pressure	Evaluate suspected PAD with noncompressible ankle arteries; help assess limb perfusion	TBI ≤0.70 is abnormal
Arterial duplex ultrasound	Assess blood flow and arterial stenosis	Non-invasive; operator-dependent
CT angiography or MR angiography	Map vascular anatomy when further definition is needed	Selection depends on renal function, contrast issues and clinical context
Catheter angiography	Detailed arterial assessment, often when intervention is planned	Invasive; specialist-directed
Venous duplex ultrasound	Evaluate venous reflux, obstruction or suspected DVT	Protocol depends on the clinical question
CBC, glucose/HbA1c, lipids, renal function	Assess comorbidities and treatment safety	Support comprehensive cardiovascular care

In patients with diabetes, a normal or high ABI alone should not be used to exclude PAD when symptoms or examination findings are suggestive. Arterial calcification may cause falsely elevated measurements.

9. Acute Limb Ischemia — The 6 Ps

Acute limb ischemia (ALI) is a sudden reduction in arterial perfusion that threatens limb viability. The 2024 ACC/AHA guideline uses symptom duration of less than two weeks for ALI.

Immediate nursing priorities

1. Recognize the emergency and activate urgent vascular/emergency assessment.
2. Assess pain, skin color, temperature, capillary refill, sensation, motor function and Doppler signals if trained and available.
3. Record symptom onset and time of deterioration.
4. Monitor vital signs and maintain appropriate IV access according to local protocol.
5. Keep the patient nil by mouth if an urgent procedure is likely and directed by the treating team.
6. Prepare for urgent imaging or revascularization as directed; do not delay emergency review to complete routine documentation.
7. Administer prescribed treatment, including anticoagulation when ordered and not contraindicated.

Critical warning: New sensory loss or motor weakness may indicate an immediately threatened limb. Acute limb ischemia requires emergency specialist evaluation. Do not elevate a critically ischemic limb high, apply compression, or delay referral.

10. Medical and Surgical Management

A. Comprehensive PAD management

• Smoking cessation: offer behavioral support and evidence-based cessation treatment.
• Lipid lowering: high-intensity statin therapy is generally recommended for established PAD unless contraindicated or not tolerated; individualized targets and additional lipid-lowering therapy depend on the applicable guideline.
• Antiplatelet therapy: single antiplatelet therapy is recommended for symptomatic PAD to reduce cardiovascular events. Choice depends on individual circumstances.
• Blood pressure management: treat hypertension according to current cardiovascular guidelines and individual tolerance.
• Diabetes management: optimize glycemic control and foot care.
• Structured exercise: supervised or structured community-based exercise is recommended for chronic symptomatic PAD when clinically appropriate.
• Foot care: inspect feet, protect skin and promptly assess ulcers or infection.

B. Medication considerations

Medication/class	Purpose and precautions
Antiplatelets (e.g., clopidogrel or aspirin)	Reduce cardiovascular events in appropriate patients; monitor for bleeding and contraindications.
High-intensity statins	Lower atherosclerotic cardiovascular risk; assess tolerability and relevant laboratory parameters.
Antihypertensive medicines	Control blood pressure and reduce cardiovascular risk; individualize selection.
Cilostazol	May improve walking symptoms in selected patients with claudication; contraindicated in heart failure.
Low-dose rivaroxaban plus low-dose aspirin	May reduce major cardiovascular and limb events in selected PAD patients, but increases bleeding risk; not suitable for everyone.
Anticoagulation for another indication	Use according to the specific indication. Full-intensity oral anticoagulation is not prescribed solely for PAD without another indication.

The 2024 ACC/AHA PAD guideline supports antiplatelet therapy, intensive lipid lowering, blood-pressure management, diabetes care, smoking cessation and structured exercise as core elements of comprehensive PAD treatment. Rivaroxaban-plus-aspirin therapy requires individualized assessment of ischemic and bleeding risk. Read the guideline summary.

C. Revascularization

• Endovascular treatment: balloon angioplasty, stenting or other catheter-based interventions in selected patients.
• Surgical bypass: creates an alternative route for blood flow around an obstructed arterial segment.
• Endarterectomy: removal of atherosclerotic plaque from selected arteries.
• Urgent revascularization: may be required for acute limb ischemia or chronic limb-threatening ischemia, depending on limb viability and anatomy.

D. Chronic venous disease treatment

• Leg elevation and regular calf-muscle activity for symptom relief.
• Compression therapy when indicated and arterial circulation permits.
• Appropriate wound dressings and treatment of associated dermatitis or infection.
• Venous duplex assessment and specialist referral for persistent symptoms or ulcers.
• Selected patients may benefit from endovenous ablation or other venous interventions.

11. Nursing Management

Assessment checklist

• Assess onset, location and pattern of pain, including exertional pain and rest pain.
• Compare both limbs for color, temperature, edema, wounds and skin changes.
• Palpate and document peripheral pulses; use Doppler assessment according to training and availability.
• Assess sensation, motor function, capillary refill and functional mobility.
• Inspect the feet, toes, heels, between toes and pressure areas.
• Review smoking, diabetes, hypertension, lipid disorders, kidney disease and medications.
• Assess for infection, tissue necrosis and symptoms suggesting acute ischemia.

Nursing interventions for PAD

1. Escalate acute changes in pain, temperature, sensation, movement or pulses immediately.
2. Administer prescribed medications and monitor for adverse effects.
3. Support structured walking or exercise programmes for stable chronic symptomatic PAD as prescribed.
4. Provide meticulous foot and skin care; protect the feet from trauma and burns.
5. Educate patients not to use heating pads or hot-water bottles on insensate or ischemic feet.
6. Support smoking cessation and control of diabetes, blood pressure and lipids.
7. Document wound dimensions, tissue appearance, drainage and changes over time.

Nursing interventions for chronic venous disease

1. Encourage leg elevation when appropriate for edema and comfort.
2. Promote walking and ankle movement to support the calf-muscle pump.
3. Apply prescribed compression only after appropriate arterial assessment and clinical authorization.
4. Maintain skin hygiene and moisturize intact skin as appropriate.
5. Use prescribed wound care and monitor for infection.
6. Educate patients about adherence to the compression and mobility plan.

Priority question: A patient with known PAD suddenly develops a cold, pale, painful foot with numbness and weakness. The priority is emergency vascular assessment, not routine exercise, compression or a scheduled follow-up.

12. Arterial and Venous Ulcers

Typical patterns only. Clinical examination and vascular assessment are required to classify ulcers safely.

Feature	Arterial ulcer	Venous ulcer
Typical site	Toes, foot edges, pressure points	Lower leg, commonly near medial ankle
Wound edge	Often sharply defined	Often irregular
Exudate	May be relatively low unless complicated	Often more exudative
Surrounding skin	May be cool, shiny and poorly perfused	May show edema, pigmentation and eczema
Pulses	Often reduced	Often present, unless arterial disease coexists
Compression	May worsen ischemia if applied inappropriately	Often beneficial when arterial supply is adequate

13. Prevention and Patient Education

• Stop smoking and avoid tobacco exposure.
• Maintain appropriate control of blood pressure, blood glucose and cholesterol.
• Follow prescribed antiplatelet, lipid-lowering and other cardiovascular treatment.
• Inspect the feet daily, including between toes and under the feet using a mirror if necessary.
• Wear well-fitting footwear and avoid walking barefoot when foot sensation or circulation is impaired.
• Avoid self-treatment of corns, calluses, blisters or ulcers when high-risk foot disease is present.
• Report new wounds, redness, drainage, discoloration or increasing pain promptly.
• For stable PAD, participate in a prescribed structured walking programme.
• For venous disease, follow the individualized plan for mobility, elevation and compression.

Seek emergency care for sudden severe limb pain, a cold or pale limb, new numbness, weakness, absent pulses or rapidly progressive discoloration. Seek prompt assessment for a nonhealing wound, black tissue or signs of infection.

14. Important Clinical Parameters — Quick Reference

Parameter	Key interpretation	Clinical note
ABI ≤0.90	Abnormal	Supports PAD diagnosis
ABI 0.91–0.99	Borderline	Consider further testing when symptoms suggest PAD
ABI 1.00–1.40	Normal range	Do not ignore persistent symptoms
ABI >1.40	Noncompressible arteries	Consider TBI and waveforms
TBI ≤0.70	Abnormal	Supports PAD in the appropriate context
ALI symptom duration	Generally <2 weeks	Emergency assessment required
Claudication	Exertional muscle discomfort relieved by rest	Assess PAD and other possible causes
CLTI	Ischemic rest pain, nonhealing wound or gangrene, generally >2 weeks	Prompt vascular specialist assessment
Acute sensory or motor loss	Threatened limb	Immediate escalation
Venous edema	Often worse with dependency	Assess for venous disease and other causes

These are diagnostic reference categories and clinical warning features, not substitutes for a full assessment. Perfusion measurements, wound duration, symptoms and overall clinical context must be considered together.

15. Mnemonics and Quick Revision

6 Ps of Acute Limb Ischemia

• Pain
• Pallor
• Pulselessness
• Paresthesia
• Paralysis
• Poikilothermia (cool limb)

Arterial vs Venous — “COLD vs WARM”

• Arterial: often cool, diminished pulses, exertional or rest pain, distal ulcers.
• Venous: often edema, heaviness, pigmentation, gaiter-area ulcers.

This is a memory aid, not a definitive diagnostic rule. Coexisting arterial and venous disease is possible.

ABI Memory Rule

• ≤0.90: abnormal.
• 0.91–0.99: borderline.
• 1.00–1.40: normal.
• >1.40: noncompressible; consider TBI.

High-yield exam facts

• Intermittent claudication is exertional muscle pain relieved by rest.
• PAD is associated with increased cardiovascular and limb-event risk.
• ABI is a first-line physiological test for suspected lower-extremity PAD.
• TBI is useful when ankle arteries are noncompressible.
• Chronic limb-threatening ischemia requires prompt vascular assessment.
• Acute limb ischemia is an emergency.
• Compression may help venous disease but must be used cautiously when arterial insufficiency is possible.
• Cilostazol can improve claudication symptoms in selected patients but is contraindicated in heart failure.
• Routine full-intensity anticoagulation is not used solely for PAD without another indication.

16. NORCET 12 Interactive Test — 25 MCQs

Peripheral Vascular Disease: Clinical and Priority-Based MCQs
Question 1 of 25

Time: 30:00

Instructions: Select one best answer. Navigate using Previous and Next. Each correct answer carries 1 mark. Submit to see your score and explanations.

17. Guideline References

• 2024 ACC/AHA Multisociety Guideline for Lower Extremity PAD: Key recommendations and clinical subsets.
• 2024 ACC/AHA PAD guideline — full text: Diagnosis, ABI categories, medical treatment and acute limb ischemia.
• 2024 ESC Guidelines: Management of peripheral arterial and aortic diseases.
• NICE CG147: Peripheral arterial disease: diagnosis and management.

Guideline note: The ABI and TBI categories in these notes follow the 2024 ACC/AHA multisociety PAD guideline. Treatment decisions must consider symptoms, limb threat, comorbidities, bleeding risk and local protocols. Venous compression requires appropriate assessment of arterial perfusion.

Educational disclaimer: This material is for nursing education and exam preparation, not a substitute for clinical assessment. Acute limb ischemia is a vascular emergency. Suspected limb-threatening ischemia, rapidly worsening wounds or signs of infection require prompt professional assessment.

End of Topic: Peripheral Vascular Disease
Revise ABI/TBI parameters, arterial versus venous ulcers, the 6 Ps of acute limb ischemia, PAD risk reduction and the priority-based MCQ explanations.