This condition is associated with atherosclerosis, the same underlying process that can affect the coronary arteries supplying the heart.
One characteristic symptom is intermittent claudication. This describes aching, cramping, or fatigue in the calf, thigh, or buttock that develops during walking or other physical activity and improves after resting.
For example, a person might notice calf pain after walking a certain distance. After stopping for a few minutes, the pain eases, allowing them to continue walking. The discomfort returns after walking a similar distance.
This recurring pattern can indicate reduced blood flow to the working muscles.
Other possible signs of peripheral artery disease include:
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Feet that feel colder than usual, particularly compared with the other foot.
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Changes in skin color or the appearance of the legs.
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Slow-healing sores on the feet or lower legs.
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Reduced hair growth on the legs.
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Weak pulses in the feet.
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Pain in the feet while resting, particularly in more advanced disease.
Not everyone with peripheral artery disease experiences obvious symptoms.
PAD does not mean that a heart attack is about to occur. However, it can be a marker of atherosclerosis elsewhere in the body and is associated with an increased risk of heart attack and stroke.
If you repeatedly experience leg pain while walking, arrange a medical assessment. A clinician may check the circulation in your legs and assess your broader cardiovascular risk.
Blood clots in the legs
Another important cause of leg symptoms is deep vein thrombosis, or DVT.
DVT occurs when a blood clot forms in a deep vein, usually in the leg. It can cause swelling, pain, tenderness, warmth, or a change in skin color.
Symptoms often affect one leg rather than both, although presentation can vary.
Risk factors include recent surgery, prolonged immobility, hospitalization, certain cancers, pregnancy and the period after childbirth, estrogen-containing medication, and a previous history of blood clots.
A clot in a leg vein does not ordinarily cause a heart attack. The major danger is that part of the clot can travel to the lungs, producing a pulmonary embolism, which can be life-threatening.
Seek urgent medical assessment if one leg suddenly becomes swollen, painful, warm, or discolored, particularly if you have risk factors for blood clots.
If these symptoms occur alongside sudden shortness of breath, chest pain, coughing up blood, or fainting, seek emergency medical help immediately.
Do not massage a leg that may contain a blood clot or wait for a home remedy to work.
When is leg pain an emergency?
Sudden, severe leg pain accompanied by a cold, pale foot, numbness, or new weakness may indicate acute limb ischemia, a serious reduction in blood supply that requires emergency treatment.
A suddenly swollen, painful leg also needs prompt assessment because DVT is one possible cause.
These symptoms are different from the typical warning signs of a heart attack, but they are important examples of how circulation problems can threaten health.
The safest approach is to evaluate leg symptoms on their own merits rather than assuming they either predict or rule out a heart attack.
2. Unexplained Fatigue That Does Not Improve With Rest
Everyone feels tired occasionally. A demanding workday, insufficient sleep, physical exertion, or emotional stress can leave a person feeling exhausted.
Fatigue becomes more concerning when it is unusual, persistent, unexplained, or severe enough to interfere with normal activities.
In some circumstances, unusual fatigue can accompany cardiovascular disease. It is especially important to pay attention when it develops alongside breathlessness, chest discomfort, dizziness, nausea, or a noticeable decline in exercise tolerance.
Why can heart disease cause fatigue?
The heart pumps oxygen-rich blood to the muscles, brain, and other organs. When a cardiovascular condition limits the body's ability to meet its demands, physical activity may become more difficult.
Heart failure, for example, can cause fatigue because the heart cannot pump blood effectively enough to meet the body's needs. It may also cause fluid accumulation, breathlessness, and swelling in the legs.
Coronary artery disease can produce fatigue or reduced exercise tolerance in some people, although fatigue alone is not a reliable way to identify the condition.
During a heart attack, unusual tiredness may occur alongside other symptoms. Some people experience symptoms that are less obvious than severe chest pain.
Women may be more likely than men to report accompanying symptoms such as unusual fatigue, nausea, or shortness of breath, although chest discomfort remains a common symptom in women as well.
The American Heart Association emphasizes that heart attack symptoms can vary and that unusual tiredness should be taken seriously when it occurs with other warning signs. <Link url="https://www.heart.org/en/health-topics/heart-attack/warning-signs-of-a-heart-attack/heart-attack-symptoms-in-women" title="Learn more about heart attack symptoms in women." />
Fatigue has many possible causes
It is important not to assume that persistent tiredness means a heart attack is developing.
Other possible explanations include:
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Insufficient sleep or sleep apnea.
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Anemia or iron deficiency.
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Thyroid disorders.
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Viral illnesses and other infections.
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Depression, anxiety, or prolonged stress.
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Medication side effects.
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Diabetes or other metabolic conditions.
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Nutritional deficiencies.
Because these conditions require different approaches, persistent fatigue deserves an assessment rather than self-diagnosis.
A healthcare professional may review your symptoms, medications, sleep habits, blood pressure, and medical history. Depending on the findings, blood tests or heart-related investigations may be appropriate.
When should fatigue raise concern?
Arrange a medical appointment if you experience unexplained fatigue that persists, worsens, or limits ordinary activities.
Seek emergency care if fatigue develops suddenly with chest pressure, significant breathlessness, cold sweating, nausea, faintness, or discomfort in the arms, jaw, back, or upper abdomen.
The key is not simply how tired you feel. It is whether the fatigue is new, disproportionate to your activity, or accompanied by symptoms that could indicate a serious medical problem.
3. Shortness of Breath During Everyday Activities
Becoming breathless after vigorous exercise can be normal. Becoming unexpectedly short of breath while walking slowly, climbing a small flight of stairs, or performing routine household tasks is a different matter.
A new reduction in exercise tolerance may indicate a heart or lung problem, anemia, an infection, or another medical condition.
Shortness of breath is particularly important because it can occur during a heart attack even when chest discomfort is absent.
How can heart problems affect breathing?
The heart and lungs work together to deliver oxygen throughout the body.
Blood returning from the lungs enters the left side of the heart before being pumped to the rest of the body. If the heart cannot pump efficiently, pressure can increase in the blood vessels of the lungs, and fluid may accumulate in lung tissue.
This can lead to breathlessness, particularly during activity or when lying flat.
Heart failure may also cause people to wake at night gasping for air or need extra pillows to sleep comfortably.
These symptoms are not proof of heart failure, but they deserve medical assessment.
Coronary artery disease can also cause breathlessness when the heart muscle does not receive enough oxygen-rich blood. In some cases, this symptom appears alongside chest discomfort. In others, it may be one of the more noticeable symptoms.