Heart attack: Four warning signs that can appear even a month beforehand

A heart attack does not always begin with the sudden, dramatic pain many people expect. In some cases, the body can show warning signs days or weeks beforehand, and those symptoms may easily be mistaken for something less serious.

High blood pressure, diabetes, smoking and a lack of exercise are established cardiovascular risk factors. Cardiologists also point to subtler signs that should not be ignored because early recognition and prompt medical help can be decisive.

One key warning sign is angina, which may feel like chest pain, pressure, heaviness, tightness or an unexplained discomfort. It can appear intermittently and may reflect the gradual buildup of plaque in the arteries. Discomfort can also spread to the neck, shoulder, arm or jaw, sometimes causing numbness. These symptoms are easy to attribute to a musculoskeletal problem, especially when they do not resemble the expected sudden pain in the left arm.

A sudden or unexplained decline in stamina is another possible warning. Someone may become short of breath during a simple task at home or in the garden, even though that level of exertion previously caused no difficulty. Breathlessness deserves particular attention when it occurs with chest pain or pressure, numbness or unusual tiredness.

Not every warning sign centers on the chest. Nausea, abdominal pain and intense fatigue can be mistaken for a gastrointestinal problem or ordinary exhaustion. Symptoms vary from person to person: some people experience mild, vague discomfort, while others may show no obvious warning signs.