# Heart Attack Source: https://ourhealthnetwork.com/conditions/heart-attack Last reviewed: 2026-05-05 ## What is Heart Attack? A heart attack happens when blood flow to part of the heart muscle is cut off long enough to cause permanent damage. The medical term is myocardial infarction, often shortened to MI. The heart depends on a network of coronary arteries to deliver oxygen-rich blood to its muscle. When one of those arteries becomes blocked, the muscle cells in that area begin to die within minutes. The faster blood flow is restored, the better the outcome. ## Overview A heart attack happens when blood flow to part of the heart muscle is cut off long enough to cause permanent damage. The medical term is myocardial infarction, often shortened to MI. The heart depends on a network of coronary arteries to deliver oxygen-rich blood to its muscle. When one of those arteries becomes blocked, the muscle cells in that area begin to die within minutes. The faster blood flow is restored, the better the outcome. Heart attacks fall into two main categories based on how completely the artery is blocked: - **STEMI (ST-elevation myocardial infarction):** A complete blockage of a coronary artery. This is the more severe type and requires immediate treatment, ideally within 90 minutes of symptom onset. - **NSTEMI (non-ST-elevation myocardial infarction):** A partial blockage. The artery is narrowed but not fully closed. Damage still occurs and it is still a medical emergency, though the timing of certain procedures may differ based on patient stability. Heart attacks are among the leading causes of death in the United States. The CDC reports that around 805,000 Americans have a heart attack each year. About 1 in 5 of those events is a "silent" heart attack, where symptoms are mild enough that the person does not recognize what is happening. Risk rises with age, particularly for men after 45 and women after 55, though heart attacks can and do occur in younger adults, especially those with unmanaged risk factors. One important distinction: a heart attack is not the same as cardiac arrest, even though the terms are sometimes used interchangeably. A heart attack is a plumbing problem, a blocked artery that cuts off blood to the heart muscle. Cardiac arrest is an electrical problem, the heart suddenly stops beating effectively. A severe heart attack can trigger cardiac arrest, but they are distinct emergencies with different initial responses. ## Symptoms and causes Heart attack symptoms can appear suddenly and intensely, or they can build slowly over hours. Some people experience the classic sensation of pressure or heaviness in the chest. Others feel only mild discomfort they mistake for indigestion or a strained muscle. Taking unusual symptoms seriously, especially when they appear together, can be lifesaving. Common symptoms include: - **Chest pain, pressure, tightness, squeezing, or a feeling of fullness** (the most frequently reported symptom) - **Shortness of breath**, at rest or with minimal activity - **Pain or discomfort spreading to the arm, shoulder, neck, jaw, or upper back** - Nausea or vomiting - **A sudden cold or clammy sweat** - Lightheadedness or dizziness - Unusual fatigue that comes on without clear cause - A sense of fullness or pain in the upper abdomen Women are more likely than men to experience symptoms beyond chest discomfort, including jaw pain, nausea, vomiting, and extreme tiredness. These subtler signals are easy to dismiss, which sometimes delays treatment significantly. Call 911 immediately if someone experiences chest discomfort that lasts more than a few minutes, or if chest symptoms appear alongside shortness of breath, cold sweats, or pain radiating to the arms, jaw, or back. Do not drive to the hospital. Emergency responders can begin treatment in the ambulance and alert the hospital team to prepare. Every minute without treatment means more heart muscle is lost. Most heart attacks are caused by coronary artery disease (CAD). Over many years, a waxy substance called plaque, made up of cholesterol, fat, calcium, and other materials, accumulates on the inner walls of the coronary arteries. This process, called atherosclerosis, gradually narrows the arteries and restricts blood flow. A heart attack typically occurs when a plaque deposit cracks or ruptures, triggering a blood clot that blocks the artery partially or completely. Risk factors: - **High LDL ("bad") cholesterol and low HDL ("good") cholesterol** - **High blood pressure (hypertension)** - **Smoking or any tobacco use** - **Type 2 diabetes or prediabetes** - **Obesity, especially excess weight around the abdomen** - Physical inactivity - Family history of heart disease, particularly in a parent or sibling before age 55 (for men) or 65 (for women) - Older age - History of preeclampsia or gestational diabetes during pregnancy When a heart attack goes untreated, the affected heart muscle dies and is replaced by scar tissue that cannot contract. Depending on how much muscle is lost, this can lead to reduced pumping function, heart failure, or dangerous heart rhythms (arrhythmias). ## Diagnosis When someone arrives at an emergency room with possible heart attack symptoms, the diagnostic process moves fast. Doctors typically begin with an electrocardiogram (ECG or EKG), a quick test that records the heart's electrical activity. An ECG can identify a STEMI within minutes. Blood is drawn to measure troponin, a protein that leaks into the bloodstream when heart muscle cells are damaged. Troponin levels are checked multiple times over several hours to confirm or rule out a heart attack and track the extent of injury. For a fuller picture of the heart and its arteries, doctors use several imaging and functional tests. A [Nuclear Stress Test](/procedure-costs/nuclear-stress-test) uses a small radioactive tracer to map blood flow through the heart at rest and under stress, revealing areas of reduced circulation. A [Stress Echocardiogram](/procedure-costs/stress-echocardiogram) uses ultrasound to capture images of heart wall movement during exercise and can pinpoint areas not receiving adequate blood. A [Coronary CTA](/procedure-costs/coronary-cta) is a specialized CT scan that produces detailed images of the coronary arteries to detect narrowing or blockages without inserting any instruments into the body. A [Cardiac Catheterization](/procedure-costs/cardiac-catheterization), also called a coronary angiogram, is the most direct approach: a thin tube is guided through an artery to the heart, dye is injected, and blockages are visualized in real time. A [Transesophageal Echocardiogram (TEE)](/procedure-costs/transesophageal-echo-tee) places an ultrasound probe in the esophagus to capture high-quality images of the heart's structure and function from close range. Test results guide how urgently treatment is needed and what kind. A STEMI pattern on ECG triggers an immediate call to the catheterization lab. Mildly elevated troponin with a non-diagnostic ECG may lead to monitoring and additional testing before a procedure decision is made. At follow-up cardiology appointments after discharge, patients can expect a review of test results, a conversation about medications, and planning for any additional imaging needed to track how the heart is healing. ## Treatment The goal of heart attack treatment is to restore blood flow to the heart muscle as quickly as possible, limit the damage, and prevent future events. Treatment is almost always a combination of emergency procedures, medications, cardiac rehabilitation, and long-term lifestyle changes. The right approach depends on the type of heart attack, how much damage occurred, and the patient's overall health. **Lifestyle Changes** Lifestyle adjustments are central to both recovery and long-term heart health. Most cardiologists refer patients to a cardiac rehabilitation program, which combines supervised exercise, nutrition counseling, and emotional support. Common changes recommended after a heart attack include: - Eating a heart-healthy diet, such as the Mediterranean or DASH diet, low in saturated fat, sodium, and added sugars - Quitting smoking and avoiding secondhand smoke - Getting regular aerobic exercise as approved by your care team - Managing stress through breathing exercises, mindfulness, or counseling - Limiting alcohol intake - Monitoring blood pressure and, if applicable, blood sugar at home regularly **Medications** Most people who survive a heart attack take several medications long-term to protect the heart and prevent a repeat event. Aspirin is almost universally prescribed to reduce clotting risk. Other antiplatelet drugs such as clopidogrel or ticagrelor are often added, particularly after a stent is placed, to further prevent clots from forming in the treated artery. Statins lower LDL cholesterol and slow the progression of plaque, and are standard care for nearly all post-heart attack patients. ACE inhibitors or ARBs help control blood pressure and reduce strain on the heart muscle as it heals. Beta-blockers such as [Acebutolol HCl](/drugs/acebutolol-hcl) slow the heart rate and reduce the heart's workload, supporting recovery and lowering the risk of dangerous rhythms in the weeks after a heart attack. For patients who continue to have very high LDL cholesterol despite statin therapy, PCSK9 inhibitors like [Alirocumab (Praluent)](/drugs/alirocumab) can lower LDL by an additional 50 to 60 percent and are increasingly used in high-risk patients after acute coronary events. If heart function is significantly reduced and fluid retention develops, diuretics such as [Amiloride HCl](/drugs/amiloride-hcl) may be prescribed to reduce the fluid load on the weakened heart. No medication should be started, stopped, or changed without first speaking with a cardiologist. **Procedures** For most heart attacks, a procedure is needed to open the blocked artery. [Coronary Stent Angioplasty](/procedure-costs/coronary-stent-angioplasty) (percutaneous coronary intervention, or PCI) is the most common emergency treatment: a small balloon is inflated inside the blocked artery and a wire mesh tube called a stent is left in place to keep it open. This is typically the first-line treatment for a STEMI and many NSTEMIs. For patients with multiple severe blockages not suitable for stenting, [Coronary Bypass Surgery (CABG)](/procedure-costs/coronary-bypass-cabg) reroutes blood around the blockages using vessels taken from elsewhere in the body. Follow-up [Cardiac Catheterization](/procedure-costs/cardiac-catheterization) may be performed weeks or months later to evaluate how the heart and the treated artery are healing. **Advanced and Emerging Treatments** High-sensitivity troponin tests now detect heart muscle damage earlier than older tests, enabling faster treatment decisions. Drug-eluting stents, which slowly release medication to prevent the artery from re-narrowing (restenosis), have become standard of care for most stenting procedures. Newer antiplatelet drugs offer stronger clot prevention than older options with similar or better safety profiles. Research into stem-cell therapies and gene-based approaches to regenerate damaged heart muscle is ongoing, though these are not yet part of standard clinical practice. ## Costs and insurance Treating a heart attack is among the most expensive medical events a person can experience. A hospital stay typically includes emergency care, diagnostic testing, one or more procedures, monitoring, and medications, and the combined bills can be substantial. The out-of-pocket amount you pay depends on your insurance plan's deductible, coinsurance rate, and whether the hospital and providers are in your network. Patients who are uninsured or underinsured should ask about the hospital's financial assistance program before or shortly after discharge, as most major hospitals offer income-based assistance. The procedures involved in diagnosing and treating a heart attack vary considerably in cost. [Cardiac Catheterization](/procedure-costs/cardiac-catheterization) is used both to identify blockages and to guide treatment. [Coronary Stent Angioplasty](/procedure-costs/coronary-stent-angioplasty) is the most commonly performed emergency intervention for heart attacks. [Coronary Bypass Surgery (CABG)](/procedure-costs/coronary-bypass-cabg) is a more complex open-heart procedure used when stenting is not feasible. Follow-up tests such as a [Nuclear Stress Test](/procedure-costs/nuclear-stress-test) or [Stress Echocardiogram](/procedure-costs/stress-echocardiogram) are commonly ordered during recovery to evaluate how well the heart is functioning. Each procedure's cost page provides Medicare-based pricing data, which serves as a useful benchmark for typical insurer reimbursement rates. Cardiology care is covered by most major insurance plans, including Medicare and Medicaid. Emergency heart attack treatment is covered by federal law regardless of whether the hospital is in your network: insurers are required to cover emergency stabilization at any facility. For follow-up outpatient cardiology visits, cardiac rehabilitation, and ongoing prescriptions, coverage varies by plan. Medicare Part B covers cardiac rehabilitation for qualifying patients who have experienced a heart attack. Review your plan's summary of benefits or call member services to understand your specific cost-sharing before scheduling post-discharge follow-up care. ## Prevention and outlook Many heart attacks are preventable. The risk factors that contribute most, including high blood pressure, high LDL cholesterol, smoking, physical inactivity, obesity, and poorly managed diabetes, are largely modifiable with lifestyle changes and, when needed, medications. Genetic predisposition and family history do raise risk and cannot be changed. But even people with a strong family history of heart disease can significantly lower their personal risk through proactive monitoring and early treatment of controllable factors. Steps that reduce risk: - Keep blood pressure below 130/80 mmHg through diet, regular exercise, and medication when prescribed - Lower LDL cholesterol with a diet low in saturated fat and, when recommended by your doctor, statin or other cholesterol-lowering therapy - Quit smoking. Risk of heart attack drops substantially within one to two years of quitting, and continues to fall over time. - Exercise for at least 150 minutes of moderate aerobic activity per week - Maintain a healthy body weight, with particular attention to waist circumference - Control blood sugar carefully if you have diabetes or prediabetes **Outlook** Survival rates for heart attacks have improved dramatically over the past five decades, largely due to faster emergency treatment and better medications. More than 90 percent of people who reach a hospital in time survive their first heart attack. Long-term prognosis depends on how much heart muscle was damaged, how quickly treatment was received, and how consistently risk factors are managed afterward. Some people return to full activity within a few weeks. Others may have lasting changes in heart function that require ongoing monitoring and therapy. Having a first heart attack does increase the risk of a second, which is why long-term medical follow-up and lifestyle changes are so important. Living with heart disease after a heart attack is very manageable for most people. Cardiac rehabilitation programs, available at hospitals and outpatient centers nationwide, have been shown to reduce the risk of a second event and help patients rebuild physical strength and emotional confidence. Support groups, both in-person and online, offer community for people adjusting to life with heart disease. Digital tools for tracking blood pressure, medications, and physical activity can help people stay on top of their health between cardiology appointments. ## Common medications - [Acebutolol Hcl](https://ourhealthnetwork.com/drugs/acebutolol-hcl) - [Acyclovir](https://ourhealthnetwork.com/drugs/acyclovir) - [Acyclovir Sodium](https://ourhealthnetwork.com/drugs/acyclovir-sodium) - [Albendazole](https://ourhealthnetwork.com/drugs/albendazole) - [Albumin Human](https://ourhealthnetwork.com/drugs/albumin-human) - [Alirocumab](https://ourhealthnetwork.com/drugs/alirocumab) - [Almotriptan Malate](https://ourhealthnetwork.com/drugs/almotriptan-malate) - [Alosetron Hcl](https://ourhealthnetwork.com/drugs/alosetron-hcl) - [Amiloride Hcl](https://ourhealthnetwork.com/drugs/amiloride-hcl) - [Amiloride/Hydrochlorothiazide](https://ourhealthnetwork.com/drugs/amiloride-hydrochlorothiazide) - [Anagrelide Hcl](https://ourhealthnetwork.com/drugs/anagrelide-hcl) - [Anidulafungin](https://ourhealthnetwork.com/drugs/anidulafungin) ## Related procedures - [Nuclear Stress Test](https://ourhealthnetwork.com/procedure-costs/nuclear-stress-test) - [Cardiac Catheterization](https://ourhealthnetwork.com/procedure-costs/cardiac-catheterization) - [Coronary Cta](https://ourhealthnetwork.com/procedure-costs/coronary-cta) - [Stress Echocardiogram](https://ourhealthnetwork.com/procedure-costs/stress-echocardiogram) - [Coronary Stent Angioplasty](https://ourhealthnetwork.com/procedure-costs/coronary-stent-angioplasty) - [Coronary Bypass Cabg](https://ourhealthnetwork.com/procedure-costs/coronary-bypass-cabg) - [Transesophageal Echo Tee](https://ourhealthnetwork.com/procedure-costs/transesophageal-echo-tee) ## Frequently asked questions ### Is a heart attack the same as cardiac arrest? No, these are different emergencies. A heart attack is a circulation problem: a blocked coronary artery cuts off blood supply to part of the heart muscle, which begins to die. Cardiac arrest is an electrical problem: the heart suddenly stops beating effectively and cannot pump blood to the body or brain. A severe heart attack can trigger cardiac arrest, but the two conditions have distinct causes and different initial treatments. Calling 911 immediately is the right response to both, but what responders do when they arrive differs significantly. ### What are the first signs of a heart attack? The most common early signs are chest pain, pressure, or tightness, along with shortness of breath, and pain that spreads to the arm, shoulder, jaw, or back. Some people also notice a sudden cold sweat, nausea, or unusual fatigue. Symptoms may develop abruptly or build gradually over hours. Women are more likely than men to experience less obvious symptoms such as jaw pain, extreme tiredness, or nausea without obvious chest discomfort. Any combination of these symptoms that appears without a clear cause warrants an immediate call to 911. ### Can you have a heart attack without chest pain? Yes. This is called a silent heart attack, and the CDC estimates that roughly 1 in 5 heart attacks happens this way. People with diabetes are at higher risk for silent heart attacks because the condition can reduce pain sensitivity over time. Silent heart attacks are often discovered later during a routine ECG or imaging test. Even without dramatic symptoms, the heart muscle damage is real and the risk of future complications is just as serious, which is why regular cardiovascular check-ups matter for people with known risk factors. ### What is the difference between a STEMI and an NSTEMI? These are the two main types of heart attack, classified by how completely the coronary artery is blocked. A STEMI (ST-elevation myocardial infarction) is caused by a complete blockage and produces a distinctive change on an ECG. It is the more severe type and typically requires opening the artery within 90 minutes through emergency angioplasty. An NSTEMI (non-ST-elevation myocardial infarction) is a partial blockage. It still causes heart muscle damage and is still a medical emergency, but the ECG pattern differs and the timing of procedures can vary depending on how stable the patient is. ### How long does a heart attack last? Heart muscle begins to die within minutes of a blockage forming, and the damage process continues until blood flow is restored through treatment. Significant damage can occur within 20 to 40 minutes, and the process can extend over several hours without intervention. This is why cardiologists use the phrase "time is muscle." The acute event ends once the artery is reopened. Physical recovery typically takes several weeks to a few months. Lifestyle changes and medications become a long-term commitment to protect the heart going forward. ### What happens to the heart after a heart attack? The area of heart muscle that was deprived of blood dies and is gradually replaced by scar tissue. Scar tissue does not contract the way healthy heart muscle does, so if the damaged area is large, the heart's pumping efficiency may decrease. The surrounding healthy muscle often adapts and compensates over time. Depending on the extent of the damage, some people develop heart failure or abnormal heart rhythms. Many people recover substantial function, particularly with prompt treatment, appropriate medications, and a structured rehabilitation program. Follow-up testing tracks how the heart adapts over time. ### Can a heart attack be prevented? For many people, yes. Most heart attacks are linked to controllable risk factors: high blood pressure, high LDL cholesterol, smoking, physical inactivity, and poorly managed diabetes. Addressing these factors through lifestyle changes and medications when needed substantially lowers risk. People with a family history of heart disease cannot change their genetics, but they can significantly reduce their personal risk through regular monitoring and early treatment. Routine check-ups that detect and treat high blood pressure and high cholesterol early are among the most effective prevention strategies available. ### Is a heart attack hereditary? Genetics play a meaningful role in heart attack risk. A family history of heart disease, especially in a parent or sibling who had a heart attack before age 55 (for men) or 65 (for women), raises personal risk. Certain inherited conditions such as familial hypercholesterolemia cause very high LDL cholesterol levels from birth and significantly increase heart attack risk if untreated. However, a genetic risk does not make a heart attack inevitable. Lifestyle choices and medical management can substantially reduce risk even in people with a strong family history. ### What doctor should I see after a heart attack? After the emergency is stabilized, care typically transitions to a cardiologist, a physician who specializes in heart and blood vessel conditions. Cardiologists manage medications, order follow-up imaging, and guide long-term decisions. An interventional cardiologist may have performed the stent procedure during the acute event. Primary care physicians play an important role in routine monitoring and coordination between specialist visits. Cardiac rehabilitation teams, which include nurses, exercise physiologists, and dietitians, are a central part of recovery and have been shown to reduce the risk of future heart events. ### What is the most effective treatment for a heart attack? For a STEMI (complete blockage), the most effective treatment is emergency coronary angioplasty with stent placement, performed as quickly as possible, ideally within 90 minutes of symptom onset. Every minute of delay increases the amount of heart muscle lost. For NSTEMIs, the optimal approach depends on the patient's risk level and may include stenting or, in some cases, bypass surgery. Long-term effectiveness depends on consistent use of prescribed medications, including antiplatelet drugs, beta-blockers, statins, and ACE inhibitors, combined with sustained lifestyle changes. Cardiac rehabilitation significantly improves outcomes over the year following a heart attack. ## Sources - OurHealthNetwork: https://ourhealthnetwork.com/conditions/heart-attack - Primary source: llm-original - Methodology: https://ourhealthnetwork.com/methodology - Data sources: https://ourhealthnetwork.com/data-sources ## Related content on OurHealthNetwork - All conditions: https://ourhealthnetwork.com/conditions - Find a specialist: https://ourhealthnetwork.com/find-doctors - Insurance plans that cover specialist visits: https://ourhealthnetwork.com/tools/insurance-matcher