PAD Risk Factors and Complications
Why Me, and What Happens If I Leave It
Two questions come up almost every time peripheral artery disease is explained to somebody for the first time. Why me. And what happens if I leave it.
Both have clear answers, and neither is as bleak as people expect. This page covers what raises the risk of PAD, what it can lead to if nothing is done, and which parts of that you can still change.
What raises your risk
Not all risk factors carry the same weight. These are grouped by how much they actually matter in PAD, which is not the same order as in heart disease.
The two that matter most
- Smoking. The single strongest risk factor, and it counts for more in PAD than in almost any other cardiovascular condition. It narrows arteries faster, it makes symptoms start earlier, and it makes treatment work less well. Former smokers carry raised risk for years, though it falls steadily after stopping.
- Diabetes. Close behind, and more dangerous because of how it hides. Diabetes damages the nerves in the feet at the same time as the arteries, so the usual warning signal is often missing. PAD in diabetes is more likely to be found late, and more likely to be found because of a wound.
Significant
- Age over 60. Over 50 if you smoke or have diabetes
- High blood pressure, particularly if it has been high for years
- High cholesterol
- Chronic kidney disease
- Known heart disease, or a previous heart attack or stroke
- A parent or sibling with PAD, an aortic aneurysm, or early heart disease
Contributing
- Carrying extra weight, and long periods of inactivity
- A diet high in processed food, salt and saturated fat
PAD is also more common among Black Americans than in the general population. That reflects a heavier burden of high blood pressure, diabetes and kidney disease, and differences in how early people get assessed. It is not something about the arteries themselves. It matters here for one practical reason. It is a further argument for checking sooner rather than waiting for symptoms.
What you can change, and what you cannot
You cannot change your age, your family history, or the years you have already had diabetes. You can change whether you smoke. You can change what your blood pressure and cholesterol are doing, how well your glucose is controlled, and how much you walk. In PAD those four account for a great deal of what happens next.
What PAD can lead to
Two very different things, and most people worry about the wrong one first.
The one people expect: the leg
Left untreated, narrowing can progress until blood flow is too low to keep the tissue healthy even at rest. That stage is called critical limb ischemia. It shows up as pain in the foot at rest, worst at night, that eases when the leg is hung out of bed. Alongside it come sores that will not heal, and in advanced cases skin on the toes or foot turning dark.
This is the stage where a limb is genuinely at risk. It is also the stage that is largely preventable. Most amputations begin as a wound that was treatable when it appeared, on a foot whose blood supply nobody had checked.
The one that is more likely: the heart and the brain
Arteries do not narrow in one place by chance. If plaque has built up enough in the legs to cause symptoms, it is very likely in the arteries feeding the heart and brain too. More people with PAD go on to have a heart attack or a stroke than ever lose a limb.
That is the real reason we take a PAD diagnosis seriously. It is less a leg problem than an early warning about the whole arterial system. And it usually arrives while there is a great deal that can still be done.
The one nobody mentions
Long before any of that, PAD quietly shortens how far people walk. The shopping trip gets planned around benches. The dog gets a shorter route. Walking less weakens the legs, which makes walking harder still, and independence narrows a step at a time. Treatment often improves walking distance a lot, and for many people that is the change they notice most.
The emergency
Rarely, an artery in the leg blocks suddenly rather than gradually, usually from a clot. The leg becomes cold, pale, numb and painful over hours. That is a medical emergency, and it needs an emergency room the same day, not an appointment.
How complications are prevented
Three things, and none of them are dramatic.
Find it
The ankle brachial index compares blood pressure at the arms and ankles. About 15 minutes, blood pressure cuffs, and a small ultrasound probe, low risk. Up to 4 in 10 people with PAD have no leg symptoms at all, so waiting for symptoms is not a plan.
Treat the whole system, not just the leg
A statin, blood pressure treated to goal, diabetes controlled, an antiplatelet such as aspirin, and stopping smoking. This is what changes the heart attack and stroke risk, which is the part that most affects how long you live.
Keep walking
A structured program of walking to the point of discomfort, resting, then walking again, improves walking distance for many people. It is first-line treatment, not something offered while you wait for a procedure. Procedures come in when symptoms still limit daily life despite good medical treatment, or when blood flow is low enough to threaten the limb.
FAQs
Common questions
If I stop smoking now, does it help?
Yes, and more than any medication on the list. Risk falls steadily from the point you stop, symptoms tend to progress more slowly, and procedures work better and last longer in people who have stopped.
Will I lose a leg?
Almost certainly not. The great majority of people with PAD never come close to that, particularly those who are diagnosed and treated. The risk sits with untreated disease, and with wounds that go unnoticed on a numb foot.
I have no symptoms. Why check?
Because up to 4 in 10 people with PAD do not get symptoms, and because the main value of finding it is what it tells us about the heart and brain arteries. That information is just as useful in someone who feels fine.
The short version
Smoking and diabetes carry the most weight, and both are things that can be acted on. The complication people fear is the leg. The one that is more likely is a heart attack or stroke, which is exactly why finding PAD early is worth it.
You can read more about the symptoms and the test on our
PAD page.
Book Your Next Appointment
Getting assessed at Lumen Heart and Vascular
At Lumen Heart and Vascular we can work this up properly in one visit, from screening and risk factor treatment through to opening the leg arteries or surgery when PAD is severe. If you carry any of the risk factors above, an ABI is a quick way to get a clear answer, and it is worth doing before symptoms rather than after.
We see patients at 13411 Parker Commons Blvd, Fort Myers, and care for people across Lee and Collier counties, including Cape Coral, Estero, Bonita Springs and Naples. We can usually see new patients within 1 to 2 days, pending insurance approval.
Call (239) 415-4900 or use the contact page to book. Physicians referring a patient can find what we need on the referral page.
This page is general education and not a substitute for individual medical advice. If you have symptoms or concerns, contact your physician or seek emergency care.
