A heart attack occurs when the flow of blood to the heart is severely reduced or blocked. The blockage is usually due to a buildup of fat, cholesterol and other substances in the heart (coronary) arteries. The fatty, cholesterol-containing deposits are called plaques. The process of plaque buildup is called atherosclerosis.

Some heart attacks strike suddenly. But many people have warning signs and symptoms hours, days or weeks in advance. Chest pain or pressure (angina) that keeps happening and doesn't go away with rest may be an early warning sign. Angina is caused by a temporary decrease in blood flow to the heart.


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If someone is unconscious and you think they're having a heart attack, first call 911 or your local emergency number. Then check if the person is breathing and has a pulse. If the person isn't breathing or you don't find a pulse, only then should you begin cardiopulmonary resuscitation (CPR).

Coronary artery disease causes most heart attacks. In coronary artery disease, one or more of the heart (coronary) arteries are blocked. This is usually due to cholesterol-containing deposits called plaques. Plaques can narrow the arteries, reducing blood flow to the heart.

A heart attack may be caused by a complete or partial blockage of a heart (coronary) artery. One way to classify heart attacks is whether an electrocardiogram (ECG or EKG) shows some specific changes (ST elevation) that require emergency invasive treatment. Your health care provider may use electrocardiogram (ECG) results to describe these types of heart attacks.

It's also a good idea to learn CPR properly so you can help someone who's having a heart attack. Consider taking an accredited first-aid training course, including CPR and how to use an automated external defibrillator (AED).

Heart attack signs and symptoms in men and women: Chest pain or discomfort; Shortness of breath; Pain or discomfort in the jaw, neck, back, arm, or shoulder; Feeling nauseous, light-headed, or unusually tired.

If you notice the symptoms of a heart attack in yourself or someone else, call 9-1-1 immediately. The sooner you get to an emergency room, the sooner you can get treatment to reduce the amount of damage to the heart muscle. At the hospital, health care professionals can run tests to find out if a heart attack is happening and decide the best treatment.

In some cases, a heart attack requires cardiopulmonary resuscitation (CPR) or an electrical shock (defibrillation) to the heart to get the heart pumping again. Bystanders trained to use CPR or a defibrillator may be able to help until emergency medical personnel arrive.

Several health conditions, your lifestyle, and your age and family history can increase your risk for heart disease and heart attack. These are called risk factors. About half of all Americans have at least one of the three key risk factors for heart disease: high blood pressure, high blood cholesterol, and smoking.2

Most heart attacks are caused by coronary artery disease. Your age, lifestyle habits, and other medical conditions can raise your risk of a heart attack. Symptoms of a heart attack include chest and upper body pain, shortness of breath, dizziness, sweatiness, and nausea. Women often experience different symptoms of a heart attack.

If you think you or someone else may be having a heart attack, call 9-1-1 right away. Acting fast can save your life. The longer the heart goes without enough oxygen, the more damage is done to the heart muscle.

Each coronary artery sends blood to a different part of your heart muscle. How much the muscle is damaged depends on the size of the area that the blocked artery supplies and the amount of time between the attack and treatment.

Anomalous coronary arteries can also lead to a heart attack. This heart condition is one you have from birth, where the blood vessels that supply your heart are in unusual positions. Sometimes, these abnormal arteries can get squeezed or compressed, which can lead to a heart attack.

Coronary artery embolism also leads to heart attacks. This is where a blood clot travels through the bloodstream and becomes lodged in the coronary artery, the blood vessel that supplies blood to the heart. As a result, this clot interferes with the normal flow of blood through the affected artery leading to a heart attack.

A coronary spasm can also lead to a heart attack. This is a serious tightening of the coronary artery that happens without warning and blocks blood flow to the heart. The condition can arise even though there is no evident buildup of plaque in your arteries.

Sex and age. Your chances of having a heart attack rise as you age. Usually, heart attack odds for men and people assigned male at birth go up at age 45. For women and people assigned female at birth, it rises at 50 or when menopause begins.

Pregnancy. Heart attacks and pregnancy are also connected, although your chances are low. But they can happen both during pregnancy and after you give birth. Age, obesity, and other health conditions up your odds of having a heart attack.

After a heart attack, you need quick treatment to open the blocked artery and lessen the damage. At the first signs of a heart attack, call 911. How long do you have during a heart attack? The best time to treat a heart attack is within 1 or 2 hours after heart attack symptoms begin. Waiting longer means more damage to your heart and a lower chance of living longer.

A heart attack is a medical emergency that needs care right away to prevent permanent heart damage or death. Treatment often begins in the ambulance if you call 911, or in the emergency room if someone else takes you to the hospital.

Bypass surgery: You might have bypass surgery in the days after a heart attack to restore the blood supply to your heart. Your surgeon will reroute blood flow around your blocked artery, usually using a blood vessel from your leg or chest. They can bypass multiple arteries.

After a heart attack, your goal is to keep your heart healthy and lower your chances of having another heart attack. Take your medications as directed, make healthy lifestyle changes, see your doctor for regular heart checkups, and consider a cardiac rehabilitation program.

To keep heart disease from getting worse and to avoid another heart attack, follow your doctor's advice. You might need to change your lifestyle. Here are some changes you can make that can lower your odds and put you on the path to a healthier life:

Stop smoking: Smoking dramatically raises your chances of both heart attacks and strokes. Talk to your doctor about how to quit. You'll also be doing your friends and family a favor because secondhand smoke can also lead to heart disease. You also can call the hotline 800-QUIT-NOW (800-784-8669) and visit the smokefree.gov website.

Keep a healthy body weight: If you're overweight or obese, you don't have to get thin to cut your odds of a heart attack or stroke, but your doctor may suggest some weight loss. If you lose 5%-10% of your weight, you'll improve your cholesterol numbers and lower your blood pressure and blood sugar levels.

Follow an exercise plan: Moderate physical activity lowers your chances of a heart attack. It also can lower your blood pressure and LDL or "bad" cholesterol, raise your HDL or "good" cholesterol, and help you stay at a healthy weight.

If you've had a heart attack or have been diagnosed with heart disease, your doctor may suggest cardiac rehabilitation. You'll work with a team of experts to boost your health and avoid future problems.

Make a doctor's appointment for 4 to 6 weeks after you leave the hospital after a heart attack. Your doctor will want to check your recovery. You might need an exercise stress test on a regular basis. These tests can help your doctor find or slow blockages in your coronary arteries and plan your treatment.

A minor heart attack, often caused by a partial blockage in a small coronary artery, typically results in limited damage to the heart muscle. These events are less serious than massive heart attacks and often have a better outlook for recovery.

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Heart attacks are a leading killer of both men and women. Each year, more than 1 million people in the United States have a heart attack, and about half of them die. Half of those who die do so within 1 hour of the start of symptoms and before reaching the hospital.

As Israeli forces continue to intensify their cataclysmic assault on the occupied Gaza Strip, Amnesty International has documented unlawful Israeli attacks, including indiscriminate attacks, which caused mass civilian casualties and must be investigated as war crimes.

The organization spoke to survivors and eyewitnesses, analysed satellite imagery, and verified photos and videos to investigate air bombardments carried out by Israeli forces between 7 and 12 October, which caused horrific destruction, and in some cases wiped out entire families. Here the organization presents an in-depth analysis of its findings in five of these unlawful attacks. In each of these cases, Israeli attacks violated international humanitarian law, including by failing to take feasible precautions to spare civilians, or by carrying out indiscriminate attacks that failed to distinguish between civilians and military objectives, or by carrying out attacks that may have been directed against civilian objects.

In Israel, more than 1,400 people, most of them civilians, have been killed and some 3,300 others were injured, according to the Israeli Ministry of Health after armed groups from the Gaza Strip launched an unprecedented attack against Israel on 7 October. They fired indiscriminate rockets and sent fighters into southern Israel who committed war crimes including deliberately killing civilians and hostage-taking. The Israeli military says that fighters also took more than 200 civilian hostages and military captives back to the Gaza Strip. 2351a5e196

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