Calling 911 immediately is the single most important thing that helps during a heart attack. Every minute the heart muscle goes without blood flow, more tissue dies permanently. Today, over 90% of people hospitalized for a heart attack survive, but that number depends heavily on how fast treatment begins. The goal is to reopen the blocked artery within 90 minutes of reaching the hospital.
What to Do in the First Few Minutes
If you or someone near you shows signs of a heart attack, call 911 before doing anything else. Don’t drive yourself to the hospital. Paramedics can begin treatment in the ambulance and alert the hospital to prepare, which shaves critical time off the clock.
While waiting for emergency services, chew and swallow one adult aspirin (162 to 325 milligrams). Chewing matters because it gets the aspirin into your bloodstream faster than swallowing it whole. Aspirin helps by making blood platelets less sticky, slowing the growth of the clot that’s blocking your artery. Skip the aspirin only if you’re allergic to it or a doctor has specifically told you not to take it.
If you have a prescription for nitroglycerin, place one tablet under your tongue. You can take up to three doses, spaced five minutes apart. If chest pain continues after three doses, that’s another reason to make sure emergency services are already on the way.
Sit or lie down in a comfortable position. Loosen any tight clothing. Try to stay as calm as possible, since stress hormones increase the heart’s demand for oxygen at exactly the wrong time.
Heart Attack vs. Cardiac Arrest
These two emergencies require different responses. A heart attack is a circulation problem: a blocked artery starves part of the heart muscle of blood, but the heart usually keeps beating. Cardiac arrest is an electrical problem: the heart stops beating entirely. An automated external defibrillator (AED) is designed for cardiac arrest, not for a heart attack where the person is still conscious and has a pulse. That said, a heart attack can trigger cardiac arrest, so if someone collapses and becomes unresponsive, start CPR and use an AED if one is available.
Recognizing Symptoms, Especially in Women
The classic heart attack sign is crushing chest pain that radiates down the left arm. Both men and women experience this, but women are more likely to have additional or alternative symptoms that don’t match the textbook picture. These include nausea, vomiting, dizziness, shortness of breath, and pain in the jaw, neck, upper back, or abdomen. Women also report prodromal symptoms in the days before a heart attack: unusual fatigue, sleep disturbance, anxiety, and arms that feel weak or heavy.
These less obvious warning signs cause women to delay going to the hospital more often than men. Jaw discomfort, unusual fatigue, and arm pain are all independently predictive of a heart attack. If something feels seriously wrong, even without classic chest pressure, don’t wait it out.
What Happens at the Hospital
The primary goal in the emergency room is restoring blood flow to the heart as quickly as possible. For the most severe type of heart attack (where a major artery is completely blocked), the standard treatment is an emergency procedure to physically open the artery. A cardiologist threads a thin catheter through a blood vessel, usually in the wrist or groin, up to the blocked coronary artery. A tiny balloon inflates to push the clot aside, and a small mesh tube called a stent is placed to hold the artery open. Clinical guidelines set a target of 90 minutes or less from the moment you arrive at the hospital to the moment that balloon inflates.
When this procedure isn’t available, typically at smaller hospitals without a cardiac surgery program, doctors may use clot-dissolving medications delivered through an IV instead. These drugs break down the blockage chemically rather than mechanically. They work best when given within the first few hours of symptoms, which is another reason speed matters so much.
In 1970, someone over 65 hospitalized for a heart attack had roughly a 60% chance of leaving alive. Today that figure exceeds 90%, largely because of faster treatment protocols and better procedures. Younger patients fare even better.
Medications After a Heart Attack
Surviving the initial event is only the first step. After a heart attack, the damaged area of your heart triggers a remodeling process where the heart changes shape and size to compensate. Left unchecked, this remodeling can gradually weaken the heart and lead to heart failure. Two categories of medication work together to prevent this.
The first type slows your heart rate and reduces how hard the heart contracts with each beat. This lowers the heart’s workload, giving damaged tissue a better chance to heal and reducing the risk of dangerous rhythm problems. The second type relaxes blood vessels and lowers blood pressure by blocking a hormone system that, when overactive, causes the blood vessels to tighten and the heart to work harder. Together, these medications reduce the risk of a second heart attack, hospitalization for heart failure, and death. Beyond lowering blood pressure, the second type also improves blood vessel function and helps the body dissolve small clots more effectively.
Most people take these medications long-term, along with a blood thinner and a cholesterol-lowering drug. Sticking with these prescriptions consistently, even when you feel fine, is one of the most effective things you can do to protect yourself after a heart attack.
Diet and Lifestyle Changes That Lower Risk
What you eat after a heart attack directly affects whether your arteries stay open. The two biggest dietary targets are saturated fat and sodium. The American Heart Association recommends keeping saturated fat below 6% of your daily calories, which works out to roughly 11 to 13 grams on a 2,000-calorie diet. That means limiting red meat, full-fat dairy, butter, and fried foods. Trans fats should be avoided entirely.
For sodium, the ideal limit is 1,500 milligrams per day, with an upper ceiling of 2,300 milligrams (about one teaspoon of salt). Most of the sodium in a typical diet comes from processed and restaurant food rather than the salt shaker. Reading nutrition labels and cooking more meals at home are the most practical ways to cut back.
Beyond diet, regular physical activity strengthens the heart muscle and improves how well your blood vessels expand and contract. Most cardiac rehabilitation programs start with supervised exercise within weeks of a heart attack, gradually building up intensity. Quitting smoking, if applicable, is equally important: smoking damages artery walls and makes blood more likely to clot, directly increasing the chance of another blockage. Within a year of quitting, your excess risk of heart disease drops significantly.