What happens during a heart attack?

Answer 1

In a heart attack (myocardial infarction) the heart is deprived of oxygen, and this eventually causes necrosis of the deprived cardiac tissues. This tissue death can result in heart failure and deadly arrhythmia.
Basically plaque builds up in the coronary artery and when the plaque hardens it explodes and platelets (cells that help to clot arteries and veins when they are cut) come in and prevent further release of the plaque that has explodes. However, this clotting can block an artery completely and stop blood flow to a part of the heart. When the blood flow stops, so does the oxygen to that part of the heart. Because of the lack of oxygen to keep the muscle going, muscle cells die in the heart, that's what happens in the heart during a heart attack!

When you have a heart attack the heart stops beating. It's because it clogs up the heart and you sometimes you will die or have brain damage

when you have a heart attack some of your heart cells stay without oxygen (Hypoxia )which may hurt or kill them related to how fast you get a medical care .

Answer 2

Coronary artery disease is the narrowing or blockage of the coronary arteries caused by atherosclerosis. Atherosclerosis (sometimes called "hardening" or "clogging" of the arteries) is the buildup of cholesterol and fatty deposits (called plaque) on the inner walls of the arteries that restricts blood flow to the heart.

Without adequate blood, the heart becomes starved of oxygen and the vital nutrients it needs to work properly. This can cause chest pain called angina. When one or more of the coronary arteries are completely blocked, a heart attack (injury to the heart muscle) may occur. When fat builds up inside your arteries it causes slight injury to your blood vessel walls. In an attempt to heal the blood vessel walls, the cells release chemicals that make the blood vessel walls stickier. Other substances traveling through your blood stream, such as inflammatory cells, cellular waste products, proteins and calcium, begin to stick to the vessel walls. The fat and other substances combine to form a material called plaque. Over time, the inside of the arteries develop plaques of different sizes. Many of the plaque deposits are soft on the inside with a hard fibrous "cap" covering the outside. If the hard surface cracks or tears, the soft, fatty inside is exposed. Platelets (disc-shaped particles in the blood that aid clotting) come to the area, and blood clots form around the plaque.If a blood clot totally blocks the blood supply to the heart muscle, called a coronary thrombus or coronary occlusion , the heart muscle becomes "starved" for oxygen and nutrients (called ischemia) in the region below the blockage. Within a short time, an acute coronary syndrome can occur. Acute Coronary Syndrome is a name given to three types of coronary artery disease that are associated with sudden rupture of plaque inside the coronary artery: unstable angina, Non-ST segment elevation myocardial infarction or heart attack (NSTEMI), or ST segment elevation myocardial infarction or heart attack (STEMI). A heart attack can also occur less frequently by a spasm of a coronary artery. During coronary spasm, the coronary arteries constrict or spasm on and off, causing lack of blood supply to the heart muscle (ischemia). It may occur at rest and can even occur in people without significant coronary artery disease. If coronary artery spasm occurs for a long period of time, a heart attack can occur.

Each coronary artery supplies blood to a region of the heart muscle. If an artery is occluded (blocked) there is no blood supply to that region.

The amount of damage to the heart muscle depends on the size of the area supplied by the blocked artery and the time between injury and treatment.

Quick treatment via mediations, angioplasty or other means to open the blocked artery is essential to lessen the amount of damage. Learn the symptoms of a heart attack and what to do if they occur.

Healing of the heart muscle begins soon after a heart attack and takes about 8 weeks. Just like a skin wound, the heart's wound heals and a scar will form in the damaged area. The new scar tissue does not contract or pump as well as healthy heart muscle tissue. So, the heart's pumping ability is lessened. The amount of lost pumping ability depends on the size and location of the scar

Answer 3

A heart attack is when blood vessels that supply blood to the heart are blocked, preventing enough oxygen from getting to the heart. The heart muscle dies or becomes permanently damaged.

Chest pain is a major symptom of heart attack. You may feel the pain in only one part of your body, or it may move from your chest to your arms, shoulder, neck, teeth, jaw, belly area, or back.

The pain can be severe or mild. It can feel like:

• A tight band around the chest
• Bad indigestion
• Something heavy sitting on your chest
• Squeezing or heavy pressure

The pain usually lasts longer than 20 minutes. Rest and a medicine called nitroglycerin do not completely relieve the pain of a heart attack. Symptoms may also go away and come back.

Answer 4

A heart attack (myocardial infarction) occurs when a coronary (heart) artery becomes too narrow to allow oxygenated blood through it. Cholesterol is what usually narrows the artery but in rare cases can be whats called a vasospasm (like a cramp, but in an artery). When oxygenated blood can no longer reach the heart muscle via the artery then that heart muscle dies... literally all the cells that that specific artery provided blood for die, making the heart that much weaker, and making the other arteries and heart muscle do more work.

Answer 5

Basically plaque builds up in the coronary artery and when the plaque hardens it explodes and platelets (cells that help to clot arteries and veins when they are cut) come in and prevent further release of the plaque that has explodes. However, this clotting can block an artery completely and stop blood flow to a part of the heart. When the blood flow stops, so does the oxygen to that part of the heart. Because of the lack of oxygen to keep the muscle going, muscle cells die in the heart, that's what happens in the heart during a heart attack!

A heart attack (or myocardial infarction) can lead to several things. If quick action is taken person will be okay (thanks to a process known as reperfusion) but there's usually some damage to the heart muscle. The heart will resume is normal function after a while, but the damage tissue will remain.

If however the patient receives no treatment, then it will lead to muscle necrosis (tissue death) and kill the patient.

Answer 6

Heart attack is caused when the blood vessels which supply oxygen,gets clogged, resulting in breathelessness,sweating,vomitting etc. The blockage in the blood vessels of the heart is temporarily diluted by angio plasty, to clear the passage, with a chance of recurring in the future. The best way is to go for Open Heart Surgery and you can lead normal life with routine precaution.

Answer 7

There are many coronary arteries. Many may have some narrowing due to a plague build up. This can cause a slowing of the blood supply to the heart muscle. If this build up gets thicker or if the heart needs to have more blood flow to its' walls (as in increased activity) then the muscle will begin to die. This is what a heart attack is. If the area is small this can heal with rest. If it is large, the wall will fail. A person will die.

Answer 8

your heart has a spasm, and then it stops.

Answer 9

u no wat wld b amazing? if mii teacher had told mii then i wldnt b on here at lik 3 am trying ta find the answer! >:(