Vascular disease is not one condition. It is a label for anything wrong with the blood vessels, and the vessels do three different jobs in three different systems. Knowing which one a diagnosis belongs to explains most of what follows from it.
Three systems, three kinds of problem
Arteries carry blood out from the heart under pressure. Their characteristic failure is narrowing or blockage, and the characteristic symptom is a tissue not getting enough supply for what it is being asked to do.
Veins carry blood back at low pressure, relying on valves and the calf muscle. Their characteristic failures are clotting and valve failure, and the characteristic symptoms are swelling, heaviness and skin change.
Lymphatic vessels drain the fluid and protein that tissues leave behind. Their characteristic failure is blocked drainage, and the characteristic symptom is swelling that involves the foot and toes. The three systems compared.
What falls under the label
| Group | Conditions |
|---|---|
| Arterial — from plaque | Coronary artery disease (heart), carotid artery disease (neck, feeding the brain), peripheral artery disease (limbs), renal and mesenteric artery disease (kidneys, gut) |
| Arterial — structural | Aortic and other aneurysms, arterial dissection, fibromuscular dysplasia |
| Venous | Deep vein thrombosis, pulmonary embolism, chronic venous insufficiency, varicose veins, post-thrombotic syndrome |
| Lymphatic | Lymphedema, primary and secondary |
| Small vessel | Diabetic microvascular disease affecting eyes, kidneys and nerves; small vessel disease in the brain |
| Vasospastic | Raynaud phenomenon and related conditions, where vessels constrict rather than block |
| Inflammatory | The vasculitides — giant cell arteritis, Buerger disease and others, where the vessel wall itself is inflamed |
The part that matters most
Atherosclerosis — the plaque process behind most arterial disease — is not a local event. It develops throughout the arterial tree over decades, driven by the same things everywhere: smoking, diabetes, high blood pressure, cholesterol, age and genetics. So a diagnosis in one place is information about the others.
This is why a diagnosis of peripheral artery disease changes more than how your legs are managed. People with PAD carry a substantially raised risk of heart attack and stroke, and for most of them that risk — not the leg — is what determines how long they live. It is also why the treatment for PAD looks so much like the treatment for heart disease: a statin, an antiplatelet, blood pressure control, blood sugar control, stopping smoking, and exercise. Those are aimed at the whole arterial tree, not the calf.
Legs as a window
Leg arteries are easy to examine and easy to test. A simple ankle-brachial index that comes back abnormal is one of the more useful pieces of cardiovascular information available, because it tells you about arteries you cannot reach. That is the real argument for getting the leg symptom checked rather than living with it.
Where the risk factors overlap and where they do not
| Risk factor | Arterial disease | Venous disease |
|---|---|---|
| Smoking | The strongest modifiable one | Raises clot risk |
| Diabetes | Major, and changes where disease sits in the leg | Not a direct cause |
| High blood pressure and cholesterol | Major | Not relevant |
| Age | Major | Yes |
| Family history | Yes | Yes, strongly, for varicose veins and clotting disorders |
| Obesity | Yes, largely through the factors above | Yes, directly, by raising venous pressure |
| Standing or sitting for long periods | No effect | Yes |
| Pregnancy, estrogen therapy | Small | Yes, clearly |
| Previous clot or immobility | No | Major |
The practical consequence is that arterial and venous disease need different prevention, and that the same leg can have both at once — which is more common than people expect and is exactly why compression is never started without checking the arteries. The full comparison.
What to do with a diagnosis
- Ask which system it is. Artery, vein, or lymphatic. Almost everything else follows from the answer.
- If it is arterial, ask what it means for your heart. Specifically: am I on a statin, am I on an antiplatelet, is my blood pressure controlled, has my diabetes risk been assessed? Those are the questions that change outcomes.
- Ask what is being monitored and how often.
- Ask what would make you call sooner. Every vascular diagnosis has a short list of changes that mean do not wait. Get yours.
- Write down your numbers. Your ankle-brachial index, blood pressure, HbA1c and cholesterol, with dates. Trends matter more than single values, and nobody tracks them for you.
Common questions
Is vascular disease the same as heart disease?
Heart disease is one form of it. Coronary artery disease is atherosclerosis in the arteries of the heart; peripheral artery disease is the same process in the limbs; carotid disease is the same process in the neck. They share causes and treatments, which is why a diagnosis in one location prompts attention to the others.
If I have PAD, do I automatically have heart disease?
Not automatically, but the likelihood is high enough that it is assumed for treatment purposes. That is why people with PAD are put on a statin and an antiplatelet even with no cardiac symptoms — the treatment is protecting arteries you cannot feel. Whether further cardiac testing is done depends on symptoms and on what is planned.
Can vascular disease be reversed?
Established plaque is not removed by treatment, though it can be stabilized so it is less likely to cause an event, and progression can be slowed substantially. Venous valve damage does not repair, but the consequences are very manageable. Lymphedema is controlled rather than cured. In every case the realistic aim is control and prevention of the next stage, and in every case that aim is achievable.
Should I be screened if I feel fine?
Population-wide screening of healthy people is not recommended, but testing is reasonable if you have risk factors — smoking history, diabetes, kidney disease, age over 65, a family history, or known disease in another arterial bed. A one-off abdominal aortic aneurysm ultrasound is also recommended for men aged 65 to 75 who have ever smoked. Raise both with your own clinician.
Where to go next
Sources
- National Heart, Lung, and Blood Institute. Peripheral Artery Disease.
- Centers for Disease Control and Prevention. About Peripheral Arterial Disease.
- Society for Vascular Surgery. Vascular Conditions.
- U.S. Preventive Services Task Force. Abdominal Aortic Aneurysm: Screening.
Written by Tom Biernacki, DPM, FACFAS. Published 21 September 2026. General education, not medical advice.