Heart attack treatment starts the moment you call 911 and continues for months afterward. The goal in the first minutes is to restore blood flow to the heart muscle as quickly as possible, because every minute of blocked blood supply causes more permanent damage. In the 1970s, someone over 65 hospitalized for a heart attack had roughly a 60% chance of surviving. Today, thanks to advances in treatment, hospital survival rates exceed 90%.
What Happens in the First Minutes
If you’re having a heart attack, the most important thing you can do before paramedics arrive is chew an aspirin. Aspirin thins the blood and helps prevent the clot in your coronary artery from growing larger. A landmark trial in 1988 showed that taking aspirin during the acute phase of a heart attack reduces cardiovascular death by 23%. This is one of the simplest, most effective interventions in all of medicine.
Once paramedics arrive, they’ll run an electrocardiogram (ECG) to check your heart’s electrical activity. This test determines the type of heart attack you’re having, which shapes everything that comes next. You may receive nitroglycerin, a tablet placed under your tongue that relaxes blood vessels and eases chest pain. If your oxygen levels drop below 90%, you’ll get supplemental oxygen, though routine oxygen in patients with normal levels can actually cause harm.
Why the Type of Heart Attack Matters
Heart attacks fall into two main categories based on how completely the artery is blocked. A STEMI (ST-elevation myocardial infarction) means a coronary artery is fully blocked, and it’s the more dangerous type. An NSTEMI (non-ST-elevation myocardial infarction) involves a partial blockage. The distinction shows up on the ECG and determines how urgently doctors need to act.
With a STEMI, the priority is reopening the artery as fast as possible. Guidelines call for the blocked artery to be physically opened within 90 minutes of first medical contact. For patients who need to be transferred from a smaller hospital to a specialized cardiac center, the window extends to 120 minutes. Paramedics who identify a STEMI in the field will bypass closer hospitals and drive straight to a facility equipped to perform the procedure.
With an NSTEMI, the approach is less immediately aggressive. Doctors stabilize you with medications to prevent clotting, ease pain, and reduce the heart’s workload. They then evaluate whether you need a procedure within the next 48 hours or whether medication alone can manage the situation, depending on how severe the blockage appears.
Opening a Blocked Artery With a Stent
The most common emergency procedure for a heart attack is percutaneous coronary intervention, widely known as angioplasty with stent placement. A cardiologist inserts a thin, flexible tube called a catheter through an artery in your groin or wrist. Using X-ray imaging and contrast dye, they thread the catheter up to your heart and locate the blockage.
Once they find it, they pass a tiny wire through the blocked section, then slide a small balloon over that wire and inflate it. This compresses the clot and plaque against the artery wall, reopening the vessel. In nearly all cases, a stent (a small mesh tube) is placed at the same time. The balloon expands the stent into position, and when the balloon is removed, the stent stays behind to hold the artery open. The cardiologist takes final images to confirm blood is flowing normally again, then withdraws the catheter.
Most stents used today are drug-eluting, meaning they’re coated with medication that slowly releases over weeks to prevent scar tissue from regrowing inside the stent. Bare metal stents are still used in some situations, and newer biodegradable stents that dissolve over time are also available.
Clot-Busting Drugs as a Backup
When angioplasty isn’t available quickly enough, doctors can use clot-dissolving medications (thrombolytics) delivered through an IV. These drugs break apart the blood clot that’s blocking the artery. They work best when given as soon as possible. Hospitals aim for a “door to needle time” of under 30 minutes, because the longer you wait, the less effective these drugs become.
Thrombolytics are typically reserved for situations where a patient can’t reach a catheterization lab within the recommended time window. They carry a higher risk of bleeding complications compared to angioplasty, so the procedure with a stent is preferred whenever it’s feasible.
When Bypass Surgery Is Needed
Some heart attacks require coronary artery bypass grafting (CABG), an open-heart surgery where a surgeon takes a healthy blood vessel from your chest or leg and uses it to reroute blood flow around the blocked artery. This is a bigger operation with a longer recovery, so it’s reserved for specific situations: blockage in the left main coronary artery (which supplies a large portion of the heart), disease in three or more vessels, anatomy that makes stent placement impractical, or cases where a stent procedure was attempted and failed.
Bypass surgery is also considered when a patient is in cardiogenic shock, a dangerous condition where the heart suddenly can’t pump enough blood to meet the body’s needs, and stenting isn’t a viable option.
Medications You’ll Take Afterward
Surviving a heart attack is only the beginning. The medications prescribed at discharge are designed to prevent a second one, and sticking with them long term is critical.
- Antiplatelet drugs: If you received a stent, you’ll take aspirin plus a second blood-thinning medication. This combination, called dual antiplatelet therapy, prevents clots from forming inside the new stent. The duration depends on the type of stent and your individual risk factors.
- Statins: These lower cholesterol and stabilize existing plaque in your arteries, making it less likely to rupture and trigger another heart attack.
- Beta-blockers: These slow your heart rate and lower blood pressure, reducing the heart’s workload. Studies in heart failure patients show that reaching the target dose leads to better heart function, fewer hospitalizations, and lower mortality compared to staying on low doses.
- ACE inhibitors or ARBs: These relax blood vessels and lower blood pressure, helping the heart heal and reducing strain over time.
These four drug classes form the standard post-heart attack regimen. Most patients take some combination of them for years, and in many cases, indefinitely.
Cardiac Rehabilitation
Cardiac rehab is a structured program that helps you recover physically and reduces the risk of future heart problems. It unfolds in three phases. The first phase begins in the hospital, where staff help you start moving safely before discharge. The second phase is outpatient, typically lasting 3 to 12 weeks, with a standard program involving 36 supervised sessions at a rehab center. The third phase is long-term maintenance, where you continue healthy habits on your own.
Rehab isn’t just exercise, though exercise is a central piece. A comprehensive program includes nutritional counseling, weight management, blood pressure and cholesterol monitoring, diabetes management if applicable, smoking cessation support, and behavioral health counseling. Psychosocial support is built in because depression and anxiety are common after a heart attack and can interfere with recovery.
Completing a full cardiac rehab program has been shown to reduce hospitalizations and cardiovascular death while improving quality of life. Despite this, many patients skip it or drop out early. If you’ve had a heart attack and are offered rehab, it’s one of the most effective tools available for protecting your heart going forward.