The most common sign of a heart attack is chest pain or discomfort that feels like pressure, tightness, or squeezing. It often spreads to the shoulder, arm, back, neck, jaw, or upper belly. But not everyone experiences that classic chest pain, and roughly 170,000 of the estimated 805,000 heart attacks in the U.S. each year are “silent,” producing minimal or no recognizable symptoms at all.
The Classic Symptoms
Most heart attacks announce themselves with a heavy, uncomfortable sensation in the center or left side of the chest. People tend to describe it not as sharp pain but as pressure, squeezing, or something sitting on their chest. This discomfort typically lasts more than a few minutes, or it may go away briefly and return.
Along with chest discomfort, you may notice:
- Pain or discomfort radiating to one or both arms, the back, neck, jaw, teeth, or upper belly
- Shortness of breath, which can come on with or without chest discomfort
- Cold sweats that feel different from normal perspiration
- Nausea or vomiting
- Lightheadedness or sudden dizziness
These symptoms often appear suddenly with no obvious trigger. Physical exertion or emotional stress can sometimes set things off, but many heart attacks happen at rest or even during sleep.
How Symptoms Differ in Women
Women can and do experience chest pain during heart attacks, but it is less likely to be their most prominent symptom. Instead, women more often report vague complaints: shortness of breath, nausea or vomiting, back or jaw pain, and extreme fatigue. Sweating, dizziness, and unusual tiredness may appear more frequently in women, and these symptoms are especially common during rest or sleep.
Because these signs don’t match the stereotypical image of someone clutching their chest, women are more likely to dismiss what’s happening or delay calling for help. Pain in the lower chest or upper abdomen can be mistaken for indigestion. Fatigue that seems out of proportion to your activity level is easy to write off. The key difference is that these symptoms come on without a clear explanation and feel distinctly abnormal.
Silent Heart Attacks
A silent heart attack produces minimal symptoms, unrecognized symptoms, or no symptoms at all. You might feel something like indigestion, a strained muscle in the chest or upper back, or prolonged, excessive fatigue. Many people never realize what happened. The damage is only discovered later, when an electrocardiogram, echocardiogram, or cardiac MRI is performed for another reason entirely.
People with diabetes and women are more likely to have silent heart attacks. The consequences are not minor just because the event was painless. A 2018 study in the Journal of the American College of Cardiology found that a silent heart attack increases the risk of heart failure by 35%. A separate study that same year, published in JAMA Cardiology, tracked participants with silent heart attacks over a decade and found that about half had died within 10 years, the same mortality rate as people who had a recognized heart attack.
Early Warning Signs Before an Attack
Heart attacks don’t always strike out of nowhere. Chest pain or pressure that keeps coming back and doesn’t go away with rest, known as angina, can be an early warning sign that blood flow to the heart is restricted. This may appear days or even weeks before a full heart attack.
Some people notice increasing fatigue with activities that previously felt easy, or shortness of breath that seems new. Brief, unexplained pain in the neck or back can also precede an event. These prodromal signs are easy to rationalize away, but recurring discomfort in the chest, jaw, arm, or upper back that comes on with exertion and eases with rest deserves prompt medical evaluation.
Heart Attack vs. Panic Attack
These two events can feel frighteningly similar, but there are practical differences. Heart attack discomfort is typically described as pressure, squeezing, or heaviness. Many people won’t even call it “pain.” It often radiates to the arm, jaw, or neck, and it may come with cold sweats and shortness of breath. Panic attack chest pain, by contrast, tends to be sharp, intense, and localized.
Timing matters too. A panic attack usually peaks within minutes and resolves on its own, rarely lasting more than 20 to 30 minutes. A heart attack will not resolve on its own. The discomfort persists, potentially for hours, until the blocked artery is treated. Panic attacks also tend to occur in the context of emotional distress or anxiety, while heart attacks typically arrive without a psychological trigger. A racing or pounding heartbeat is more characteristic of a panic attack. If you’re unsure which you’re experiencing, treat it as a heart attack. The risk of being wrong in the other direction is too high.
What to Do During a Suspected Heart Attack
Call 911 immediately. Do not drive yourself to the hospital. Emergency medical teams can begin treatment in the ambulance and alert the hospital before you arrive, which saves critical time. The medical standard for opening a blocked artery after hospital arrival is 90 minutes, and every minute of delay means more heart muscle lost.
While waiting for help, chew (don’t swallow whole) a regular aspirin if you have one available and are not allergic. Chewing gets it into your bloodstream faster. The recommended dose is 162 to 325 milligrams. Sit or lie down in whatever position feels most comfortable, and try to stay calm.
If someone near you loses consciousness and stops breathing normally, begin chest compressions immediately. Emergency dispatchers will walk you through the steps over the phone. Do not wait to see if the person wakes up on their own.