The first signs of a heart attack usually include chest discomfort described as pressure, squeezing, or fullness in the center or left side of the chest. This discomfort typically lasts more than a few minutes or goes away and comes back. But chest pain isn’t always the first thing you notice, and in some cases it never appears at all.
The Most Common Symptoms
Most heart attacks produce a combination of symptoms rather than a single dramatic sign. The classic presentation includes chest pressure or pain that may spread into one or both arms, the jaw, neck, or back. Shortness of breath often accompanies the chest discomfort, though it can also appear on its own before any chest pain starts. Many people break into a cold sweat, feel lightheaded, or experience sudden weakness.
The sensation in the chest is often misunderstood. People expect sharp, stabbing pain, but heart attack chest discomfort more often feels like something heavy sitting on your chest, a tight squeeze, or an uncomfortable fullness. Some describe it as severe indigestion. This is partly why so many people delay calling for help: the feeling doesn’t match what they imagined a heart attack would be like.
Warning Signs Days or Weeks Before
Heart attacks don’t always strike out of nowhere. Many people experience subtler warning signs in the days or weeks leading up to the event. These early signals frequently include unusual fatigue that seems out of proportion to your activity level, anxiety, and flu-like symptoms. Some people notice increasing shortness of breath with activities that previously felt easy, or chest tightness that comes and goes during exertion.
These prodromal symptoms are easy to dismiss. Feeling unusually tired or run-down for several days, having trouble catching your breath climbing stairs you normally handle fine, or experiencing vague discomfort in your chest or upper back can all point to a heart that’s gradually losing blood supply. The pattern to watch for is new and unexplained symptoms, especially if they worsen over time or come on with physical effort.
How Symptoms Differ in Women
Women are more likely to experience heart attack symptoms that don’t fit the textbook picture. Sweating, nausea, dizziness, and unusual fatigue are common in women and may occur while resting or even during sleep. Chest pain, when it does happen, is often not severe or even the most noticeable symptom.
Instead, women frequently report vague shortness of breath, nausea or vomiting, back or jaw pain, pain in the lower chest or upper abdomen, and extreme fatigue. Because these symptoms overlap with so many other conditions, women are more likely to attribute them to stress, the flu, or acid reflux. This is one reason heart attacks in women are more often diagnosed late. If you’re a woman experiencing a cluster of these symptoms, particularly if they’re new, came on suddenly, or feel different from anything you’ve experienced before, treat them seriously.
Silent Heart Attacks
Roughly 1 in 5 heart attacks produce symptoms so mild that the person doesn’t realize what happened. Some estimates put the number closer to 2 in 5. These silent heart attacks are more common in women and people with diabetes, whose nerve damage can blunt the pain signals the heart sends.
Silent heart attack symptoms tend to feel like the flu, a sore muscle in the chest or upper back, an ache in the jaw or arms, deep fatigue, or indigestion. Many people only discover they had one when a later EKG or imaging test reveals damage to the heart muscle. A silent heart attack still causes real harm and increases your risk of a future, potentially more severe event.
Heart Attack vs. Heartburn
Heartburn and heart attacks can feel remarkably similar. Even experienced doctors sometimes can’t distinguish them based on symptoms alone. There are a few patterns that can help, though neither is foolproof.
Heartburn typically produces a burning sensation that occurs after eating, while lying down, or when bending over. It usually responds to antacids and may come with a sour taste in your mouth or a small amount of stomach contents rising into your throat. Heart attack discomfort, by contrast, tends to feel more like pressure or squeezing and often radiates into the arms, neck, jaw, or back. It commonly comes with shortness of breath, cold sweats, lightheadedness, or nausea that has nothing to do with food.
The critical distinction: if you’re not sure, treat it as a heart attack. The overlap between the two is too great to gamble on.
Why Minutes Matter
When a heart attack begins, heart muscle cells start losing oxygen and suffering damage almost immediately. Permanent damage to the heart muscle begins within 30 minutes of the blockage. The longer the artery stays blocked, the more muscle dies and the weaker the heart becomes afterward. This is why rapid treatment dramatically improves survival and long-term heart function.
If you suspect a heart attack, call emergency services immediately. While waiting, chewing a regular aspirin (not swallowing it whole) can help. The current recommendation from the American Heart Association is 162 to 325 milligrams for adults with nontraumatic chest pain, unless you have a known aspirin allergy or have been told by a doctor not to take it. Chewing gets the medication into your bloodstream faster than swallowing.
Don’t drive yourself to the hospital. Emergency responders can begin treatment in the ambulance and will alert the hospital so the cardiac team is ready when you arrive. Every minute of delay costs heart muscle that cannot regenerate.