Heart Attack
What is Heart Attack?
A heart attack happens when blood flow to part of the heart muscle becomes blocked. This blockage prevents oxygen from reaching heart cells, causing them to become damaged or die. The medical term for a heart attack is myocardial infarction.
Most heart attacks occur when a fatty deposit called plaque builds up inside the coronary arteries. These arteries supply blood to your heart. When plaque ruptures, a blood clot forms and blocks the artery. The longer the blockage lasts, the more damage occurs to your heart muscle.
Heart attacks are a leading cause of death in the United States. They affect more than 800,000 Americans each year. Quick treatment can save lives and prevent lasting heart damage. Many heart attacks are preventable through lifestyle changes and managing risk factors you can measure with blood tests.
Symptoms
- Chest pain or discomfort that may feel like pressure, squeezing, or fullness
- Pain that spreads to the shoulder, arm, back, neck, jaw, or stomach
- Shortness of breath that may occur with or without chest discomfort
- Cold sweat or sudden sweating
- Nausea or vomiting
- Lightheadedness or sudden dizziness
- Unusual fatigue, especially in women
- Anxiety or a sense of impending doom
Women may experience different symptoms than men, including unusual fatigue, sleep disturbances, and shortness of breath without chest pain. Some people have mild symptoms or none at all, which is called a silent heart attack. This is more common in people with diabetes.
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Causes and risk factors
Heart attacks are primarily caused by coronary artery disease. This happens when cholesterol, fat, and other substances build up on artery walls. These deposits are called plaque. Over time, plaque can harden and narrow your arteries. When plaque ruptures, your body forms a blood clot to seal the break. This clot can block blood flow to your heart muscle.
Major risk factors include high LDL cholesterol, high blood pressure, smoking, diabetes, obesity, physical inactivity, poor diet, excessive alcohol use, stress, and family history of heart disease. Age also matters, with risk increasing for men over 45 and women over 55. Blood clotting disorders like low Protein C Activity can increase your risk by making clots more likely to form. Managing these risk factors through testing and lifestyle changes can significantly reduce your heart attack risk.
How it's diagnosed
Doctors diagnose heart attacks using several methods. An electrocardiogram records the electrical activity of your heart and shows damage patterns. Blood tests measure cardiac enzymes that leak into your bloodstream when heart cells are damaged. Elevated AST levels can indicate heart muscle damage during a heart attack. Imaging tests like chest X-rays, echocardiograms, and cardiac catheterization help doctors see blockages and assess damage.
Preventive blood testing helps identify risk factors before a heart attack occurs. Direct LDL cholesterol testing measures the bad cholesterol that builds up in arteries. Protein C Activity testing checks for blood clotting disorders that increase clot formation risk. Prothrombin testing evaluates another clotting factor that affects heart attack risk. Rite Aid offers testing for these important heart health markers at Quest Diagnostics locations nationwide. Regular testing helps you catch and address risk factors early.
Treatment options
- Emergency treatments include aspirin, clot-busting medications, blood thinners, and procedures to open blocked arteries
- Medications like beta blockers, ACE inhibitors, statins, and antiplatelet drugs to prevent future attacks
- Cardiac rehabilitation programs that include exercise training, education, and counseling
- Heart-healthy diet focused on vegetables, fruits, whole grains, lean proteins, and healthy fats
- Regular physical activity, at least 150 minutes of moderate exercise per week
- Smoking cessation if you currently smoke
- Weight management to reach and maintain a healthy body weight
- Stress management through meditation, yoga, or counseling
- Blood pressure control through diet, exercise, and medications if needed
- Cholesterol management with lifestyle changes and statins when appropriate
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- Simple blood draw at your nearest lab
- Results in days, not weeks
- Share results with your doctor
Frequently asked questions
Most people experience chest pain or discomfort that lasts more than a few minutes. It may feel like uncomfortable pressure, squeezing, fullness, or pain in the center of your chest. The pain often spreads to your shoulders, arms, back, neck, jaw, or stomach. You may also feel short of breath, sweaty, nauseous, or lightheaded.
Yes, silent heart attacks occur when symptoms are mild or absent. Studies suggest that up to 45 percent of heart attacks are silent. People with diabetes are more likely to have silent heart attacks because nerve damage can affect how they feel pain. These attacks still cause heart damage and show up on tests.
Direct LDL cholesterol measures the bad cholesterol that clogs arteries. Protein C Activity and Prothrombin testing check for blood clotting problems that increase risk. AST levels can reveal heart muscle damage during or after a heart attack. Regular testing helps you identify and manage these risk factors before they cause problems.
Every minute counts during a heart attack. The longer your heart goes without blood flow, the more damage occurs. Call 911 immediately if you suspect a heart attack. Treatment works best when started within 1 to 2 hours of symptom onset. Never drive yourself to the hospital or wait to see if symptoms pass.
High LDL cholesterol comes from eating too much saturated fat, trans fat, and dietary cholesterol. Lack of physical activity, excess weight, smoking, and genetics also play roles. Some people inherit genes that cause their bodies to make too much cholesterol. Regular blood testing helps you monitor your levels and adjust your lifestyle accordingly.
Yes, although heart attacks are more common after age 45 for men and 55 for women, younger people can have them too. Risk factors like smoking, obesity, diabetes, high cholesterol, high blood pressure, and drug use increase risk at any age. Family history of early heart disease also raises your risk. Preventive testing helps identify risk factors early in life.
Protein C is a natural substance that helps prevent excessive blood clotting. When Protein C Activity is low, your blood clots more easily than it should. These clots can block coronary arteries that supply blood to your heart muscle. Testing for Protein C Activity helps identify people at higher risk for dangerous clot formation.
Eat a diet rich in vegetables, fruits, whole grains, and lean proteins while limiting saturated fat and sodium. Exercise for at least 150 minutes per week at moderate intensity. Quit smoking if you currently smoke. Maintain a healthy weight with a body mass index under 25. Manage stress through relaxation techniques and adequate sleep.
Yes, women often experience subtler symptoms that differ from the classic chest pain. Women are more likely to feel unusual fatigue, shortness of breath, nausea, back pain, or jaw pain without significant chest discomfort. Sleep disturbances and anxiety may also occur in the weeks before a heart attack. These differences can lead to delayed diagnosis in women.
Adults should check cholesterol levels every 4 to 6 years starting at age 20. People with risk factors like diabetes, high blood pressure, or family history need more frequent testing. Your doctor may recommend annual or even more frequent monitoring if you have existing heart disease. Regular testing helps you track trends and adjust your prevention strategy.