The hallmark sign of a heart attack is chest pain or pressure that lasts more than 20 minutes and doesn’t go away with rest. But not everyone experiences that classic symptom, and recognizing the less obvious signs can be the difference between life and death. Getting medical care within the first hour saves roughly 107 lives per 1,000 patients treated, compared to just 21 per 1,000 when treatment is delayed beyond 12 hours.
The Classic Warning Signs
The most recognizable symptom is a feeling of pressure, tightness, or heaviness in the center of the chest. People often describe it as something sitting on them or squeezing them, rather than a sharp stabbing pain. This discomfort is usually behind the breastbone and can come and go or stay constant, but it persists for more than 20 minutes.
That chest pressure often travels. It may radiate to the left shoulder, down one or both arms, up into the neck or jaw, or into the upper back. Some people feel it in their upper stomach and mistake it for heartburn. These spreading sensations can appear alongside the chest pressure or, in some cases, show up on their own.
Other symptoms that commonly appear at the same time include:
- Shortness of breath, even without physical exertion
- Cold sweating that seems to come from nowhere
- Nausea or vomiting
- Lightheadedness or dizziness
- Overwhelming fatigue
How Symptoms Differ in Women
Women are more likely to experience a heart attack without the dramatic chest-clutching pain most people picture. Chest discomfort may be mild, vague, or absent entirely. Instead, women more often report shortness of breath, nausea, vomiting, back pain, or jaw pain as their primary symptoms. Sweating, dizziness, and extreme fatigue are also common, and these symptoms may appear while resting or even during sleep.
Because these symptoms overlap with so many other conditions, women are more likely to dismiss a heart attack as the flu, stress, or exhaustion. If these symptoms come on suddenly, feel different from anything you’ve experienced before, or combine together, treat them seriously even without chest pain.
Silent Heart Attacks
Some heart attacks produce little to no noticeable pain. These “silent” heart attacks are especially common in people with diabetes. The nerve damage that diabetes causes can blunt the body’s pain signals, meaning the heart can be starved of blood without triggering the chest pressure that would normally force someone to seek help. A person with diabetes might exercise longer than they safely should, developing more severe damage because the usual warning pain never kicks in.
Older adults are also at higher risk for silent heart attacks. The only clues might be unexplained fatigue, mild indigestion, or a general feeling of being unwell. Some silent heart attacks are only discovered later, during a routine exam, when testing reveals damage that already occurred.
Heart Attack vs. Panic Attack
Both heart attacks and panic attacks cause chest discomfort, a racing heart, and a feeling that something is seriously wrong, which makes them easy to confuse. There are a few patterns that can help distinguish them, though neither you nor the person experiencing it should try to diagnose this in the moment.
Heart attack pain tends to feel like pressure, squeezing, or heaviness. Panic attack pain is typically much sharper, more intense, and more localized. During a panic attack, your heart rate climbs as high as it can go for your age, and you’ll usually feel it pounding or racing prominently. A heart attack can also raise your heart rate, but the dominant sensation is more often the chest pressure and radiating discomfort than the rapid pounding.
Panic attacks usually peak within 10 to 20 minutes and then gradually ease. Heart attack symptoms persist or worsen. If there’s any doubt at all, call emergency services. The consequences of ignoring a heart attack far outweigh the inconvenience of an ER visit for a panic attack.
What a Bystander Can See
If someone near you is having a heart attack, you might notice them pressing a clenched fist against their chest, a gesture so common it has a clinical name. They may look pale or gray, be drenched in a sudden cold sweat, or appear anxious and restless without a clear reason. Difficulty breathing, clutching at their arm or jaw, or suddenly needing to sit down are all visible cues. Some people become nauseated or vomit. If they lose consciousness, the situation has become immediately life-threatening.
Early Signs That Can Appear Days Before
Heart attacks don’t always strike without warning. Some people experience recurring chest pain or pressure in the days or weeks beforehand, particularly during physical activity. This chest discomfort that keeps happening and doesn’t go away with rest is an early warning sign that the heart isn’t getting enough blood. Unusual fatigue, sleep disturbances, and shortness of breath with minimal effort can also precede a major event. These prodromal symptoms are the body signaling that a blockage is building, and they represent a window to get help before a full heart attack occurs.
What to Do in the Moment
Call emergency services immediately. Do not drive yourself or the other person to the hospital. Paramedics can begin treatment in the ambulance, and that head start matters enormously. Research on heart attack outcomes shows that survival is strongly tied to how quickly a person comes under medical care. Among patients who reached care within one hour, the survival benefit from treatment was five times greater than for those who waited more than 12 hours.
While waiting for an ambulance, have the person sit or lie in whatever position is most comfortable. If they are not allergic to aspirin and have no condition that makes aspirin dangerous, chewing and swallowing a full 325 mg aspirin can help. Chewing is important because it gets the medication into the bloodstream faster than swallowing it whole. The 911 operator can walk you through whether aspirin is appropriate.
If the person becomes unresponsive and stops breathing normally, begin CPR. Push hard and fast on the center of the chest, about 100 to 120 compressions per minute. If an automated defibrillator is available nearby, use it. These machines provide voice instructions and are designed for untrained bystanders to operate.
Every minute counts. The single most important thing you can do for someone having a heart attack is get professional help on the way as fast as possible.