Heart attack treatment starts the moment you call emergency services and continues for months afterward. The core goal at every stage is the same: restore blood flow to the heart muscle as fast as possible, then prevent it from happening again. How quickly that blood flow returns determines how much heart muscle survives, which is why emergency rooms measure treatment speed in minutes, not hours.
What to Do Before Help Arrives
If you or someone nearby is having a heart attack, call 911 first. Not after taking a pill, not after seeing if the pain passes. The clock on heart muscle damage is already running.
While waiting for paramedics, chew an aspirin if the 911 operator tells you to. Chewing gets it into the bloodstream faster than swallowing whole. Aspirin slows the clotting that’s blocking the artery, which can limit damage while you’re in transit. If you already have a prescription for nitroglycerin, take it as your doctor previously instructed. Never take someone else’s nitroglycerin.
How Doctors Decide Your Treatment
In the emergency room, an electrocardiogram (EKG) and blood tests tell doctors which type of heart attack you’re having. This distinction shapes everything that follows.
A STEMI means a coronary artery is completely blocked. Blood flow to a section of heart muscle has stopped entirely, and that tissue is dying across its full thickness. This is the most time-sensitive scenario, and it triggers the fastest intervention the hospital can deliver.
A NSTEMI means the artery is partially blocked. Blood is still trickling through, but not enough. The damage tends to be limited to the inner layer of the heart wall. Treatment is still urgent, but doctors often have a slightly wider window to assess the situation and plan the best approach.
Reopening a Blocked Artery
The primary treatment for a STEMI is a procedure called percutaneous coronary intervention, or PCI. You’ll hear it referred to as angioplasty with stenting. A cardiologist threads a thin tube (catheter) through a blood vessel in your wrist or thigh, guides it to the blocked coronary artery, and inflates a tiny balloon at its tip. The balloon pushes the blockage open. Then, in most cases, a small mesh tube called a stent is left in place to keep the artery from collapsing shut again.
Most stents used today release medication directly into the artery wall over time, which prevents scar tissue from re-narrowing the opening. With these drug-coated stents, the chance of the artery closing again is less than 5%.
Current guidelines say this procedure should happen within 90 minutes of first medical contact for patients already at a hospital that can perform it, or within 120 minutes if you need to be transferred to another facility. Those time targets exist because every additional minute of delay means more heart muscle lost.
When PCI Isn’t Available
Not every hospital has a cardiac catheterization lab. If you’re at a facility that can’t perform PCI and transfer to one that can would take more than two hours, doctors use clot-dissolving medications instead. These drugs break apart the blood clot that’s blocking the artery, restoring at least some blood flow. They’re less effective than PCI overall, but they work when the alternative is waiting too long. Clot-dissolving drugs can’t be used if you have active bleeding, a recent brain hemorrhage, recent brain or spine surgery, severe uncontrolled high blood pressure, severe kidney disease, or a recent traumatic brain injury.
Treatment for NSTEMI
Because the artery is partially open, NSTEMI treatment follows a slightly different timeline. If you’re at intermediate or high risk for worsening heart damage, doctors typically perform angiography (imaging of your coronary arteries) during your hospital stay, with the intent to place a stent or recommend surgery if needed. For patients who are unstable, with chest pain that won’t resolve, dangerous heart rhythms, or signs of heart failure, the procedure happens within two hours of admission. Lower-risk patients may undergo further testing first to determine whether they actually need an invasive procedure at all.
When Bypass Surgery Is Needed
Stenting works well for one or two isolated blockages, but some patients have more complex disease. Coronary artery bypass grafting (CABG) takes a healthy blood vessel from your chest, leg, or arm and reroutes blood flow around the blocked section of the coronary artery. It’s major open-heart surgery, typically requiring several days in the hospital and weeks of recovery at home.
Bypass surgery is generally recommended when blockages affect multiple arteries, when the main artery feeding the left side of the heart is significantly narrowed, or when the heart’s pumping ability is already weakened. It’s also an option when PCI fails or the anatomy of the blockage makes stenting impractical. For patients with widespread coronary artery disease, bypass surgery offers a greater long-term survival benefit than stenting alone, particularly when the heart is already pumping below normal strength.
Medications After a Heart Attack
Once the immediate crisis is over, you’ll leave the hospital with several prescriptions designed to prevent a second heart attack. The standard combination includes four types of medication.
- Aspirin and a second blood thinner (dual antiplatelet therapy): If you received a stent, you’ll take two antiplatelet drugs together to prevent clots from forming on the new stent. The standard duration has been 12 months, though recent research shows that personalizing the length, anywhere from 3 to 24 months based on your individual risk profile, may produce better outcomes with fewer side effects than a one-size-fits-all approach.
- A statin: Lowers cholesterol and stabilizes the fatty plaques inside your arteries so they’re less likely to rupture and cause another blockage.
- A beta-blocker: Slows your heart rate and lowers blood pressure, reducing the workload on a heart that’s recovering from damage.
- An ACE inhibitor or ARB: Relaxes blood vessels and lowers blood pressure through a different pathway. These drugs also help prevent harmful remodeling of the heart muscle after injury.
Sticking with these medications long-term is one of the most important things you can do after a heart attack. Studies consistently show that patients who stop taking them early face a significantly higher risk of a second event.
Cardiac Rehabilitation
Cardiac rehab is a structured recovery program that dramatically improves outcomes after a heart attack, yet many patients skip it or don’t get referred. It unfolds in three phases.
Phase 1 starts while you’re still in the hospital. A rehab team gets you moving gently, walking short distances, and beginning to understand what recovery will look like. Phase 2 is the core of the program: you attend outpatient sessions, typically two or three times a week for several weeks, where you exercise under medical supervision while your heart rate, blood pressure, and symptoms are monitored. These sessions also cover nutrition, stress management, and understanding your medications. Phase 3 is when you transition to exercising on your own, maintaining the habits and fitness level you built during supervised sessions.
The exercise component isn’t just about getting fit again. Supervised physical activity after a heart attack strengthens the heart, improves how efficiently your body uses oxygen, lowers blood pressure, and helps control blood sugar and cholesterol. The education and support components address the psychological side of recovery too, since anxiety and depression are common after a cardiac event and can interfere with healing if left unaddressed.