Peripheral Artery Disease: 5 major causes, and ways to prevent it

Peripheral Artery Disease, the narrowing of blood vessels in the legs, has exploded in prevalence. Data from the Global Burden of Disease study suggest that global PAD cases surged from roughly 66 million in 1990 to more than 113 million in 2019. When ignored, PAD can raise the risk of heart attack, stroke and limb loss. Yet many people dismiss early symptoms as routine ageing. Understanding what drives PAD, and how early prevention works, is now critical for protecting long-term heart and limb health.

PAD is a condition in which the arteries that supply blood to the legs and feet become narrowed or blocked, usually because of atherosclerosis, the buildup of fatty plaque inside vessel walls.
Medical guidelines classify PAD as a major cardiovascular disease, not just a limb problem. Large studies show that people with PAD have a significantly higher risk of heart attack and stroke, since the same process clogging the leg arteries often affects the coronary and carotid arteries as well.
PAD can range from mild, with no obvious symptoms, to severe forms like critical limb ischemia, where blood flow becomes so restricted that ulcers, infections, or even gangrene can develop. Early diagnosis and timely treatment play a crucial role in preventing long-term complications.

High blood pressure is a major force behind the arterial damage that leads to Peripheral Artery Disease. A landmark study in the Atherosclerosis Risk in Communities (ARIC) cohort found that people with hypertension had a 1.5–2 times higher risk of developing PAD compared to those with normal blood pressure.
Why high BP leads to PAD:
• Damages artery walls
•Accelerates atherosclerosis
•Increases arterial stiffness

A study found that people with high blood pressure had a 1.5 to 2 times higher risk of developing PAD. To control BP, several lifestyle changes like reducing salt intake, regular exercise, weight management can help keep BP in controlled range.

A landmark study found that higher LDL levels were strongly associated with incident PAD, even after adjusting for smoking and hypertension. A major meta-analysis in Lancet also confirmed that every 1 mmol/L reduction in LDL reduces the risk of major vascular disease, including PAD, by roughly 20–25%.
Why high LDL leads to PAD:
• LDL particles infiltrate artery walls and form plaque
• Triggers inflammation and foam-cell formation
• Accelerates narrowing in leg arteries

Managing LDL starts with a heart-healthy diet rich in vegetables, fruits, whole grains, and healthy fats, while limiting saturated and trans fats. Regular exercise and maintaining a healthy weight help lower cholesterol naturally.

In the landmark ‘Framingham Heart Study’, people with diabetes had nearly double the risk of developing PAD compared to non-diabetics. Another major analysis reported that every 1% rise in HbA1c significantly increased the risk of vascular complications, including PAD.
Why diabetes leads to PAD:
Interferes with lipid metabolism
Causes microvascular and nerve damage
Damages artery walls (endothelial dysfunction)
To manage diabetes effectively, lifestyle changes like regular exercise, a balanced diet, weight management, and medication adherence can help keep blood sugar under control and protect your arteries.

Smoking is the single most powerful modifiable risk factor for Peripheral Artery Disease. A large meta-analysis reported that current smokers have nearly 2.7 times the risk of PAD compared to non-smokers, and heavy smoking increases the risk even further. Long-term studies also show that the elevated risk persists for years after quitting, highlighting the cumulative effect of smoking on peripheral arteries.
Why smoking leads to PAD:
• Damages artery walls and endothelial cells
• Reduces oxygen delivery to leg muscles

Age is a non-modifiable but powerful risk factor for Peripheral Artery Disease. NIH study shows that PAD prevalence rises sharply after age 60, reaching more than 20% in people over 80. In addition, cumulative exposure to multiple cardiovascular risk factors over decades greatly amplifies PAD risk, making early lifestyle interventions crucial.
Why age and cumulative risk lead to PAD:
• Arteries stiffen naturally with age
• Higher likelihood of coexisting conditions like diabetes, high BP

While age cannot be changed, early lifestyle interventions and management of modifiable risk factors can help slow PAD progression and protect long-term cardiovascular and limb health. Long-term inflammation and oxidative stress gradually damage blood vessel walls, accelerating plaque buildup. Recognizing these age-related changes early allows for timely action that can significantly improve circulation and overall vascular resilience.