a heart attack occurs when course hero

What is the first stage of a heart attack?

Question 9 3 3 pts a heart attack occurs when cardiac. Question 9 3 / 3 pts A heart attack occurs when cardiac cells receive an inadequate supply of ____. glucose calcium sodium oxygen potassium. Question 10 3 / 3 pts Fluid that leaves the capillaries is returned to the blood by the ____. carotid artery arterioles arteries lymphatic system ...

How long does the acute phase of a heart attack last?

The leading cause of death in the United States, a heart attack occurs when the blood flow to part of your heart muscle is suddenly blocked by a clot or rupture. Most heart attacks occur suddenly and unexpectedly and can remain undetected for hours while they starve the heart muscle of oxygen, resulting in tissue death.

What are the signs of a heart attack?

The levels of oxygen in the blood vessel decline dramatically because of carbon monoxide poisoning and abnormal lung functioning, causing the heart to receive un-oxygenated blood. The common symptoms of a heart attack include chest pains and difficulty in breathing. As a result, the muscles in the heart will get damaged, triggering a heart attack.

What is a myocardial infarction?

A heart attack occurs when blocking the blood flow to the heart, and sudden cardiac arrest occurs when the heart dysfunctions and suddenly stops beating unexpectantly. 5. Do you know anyone who has had a stroke OR heart attack?

How does a heart attack occur *?

A heart attack occurs when an artery supplying your heart with blood and oxygen becomes blocked. Fatty deposits build up over time, forming plaques in your heart's arteries. If a plaque ruptures, a blood clot can form and block your arteries, causing a heart attack.Jun 16, 2020

What is a heart attack answer?

A heart attack, or myocardial infarction, occurs when there is a blockage in a coronary artery, affecting the flow of oxygen-rich blood to your heart. Having a heart attack is a medical emergency. Blocked or reduced blood flow to your heart damages the heart muscle.Jan 25, 2022

What Causes heart attack Class 11?

Heart attacks usually occur due to the blockage of a coronary artery in the heart. Cardiac Arrests usually occur when the heart stops beating due to certain reasons. The primary cause for getting heart attacks is due to the blood clots that occur in the arteries.

What happens during a heart attack?

Most heart attacks involve discomfort in the center or left side of the chest that lasts for more than a few minutes or that goes away and comes back. The discomfort can feel like uncomfortable pressure, squeezing, fullness, or pain. Feeling weak, light-headed, or faint. You may also break out into a cold sweat.Jan 11, 2021

What are the 2 types of heart attacks?

The three types of heart attacks are:ST segment elevation myocardial infarction (STEMI)non-ST segment elevation myocardial infarction (NSTEMI)coronary spasm, or unstable angina.

What are 5 warning signs of a heart attack?

5 warning signs of a heart attack that you may not knowDizziness, light-headedness or feeling faint. ... Nausea, indigestion, or vomiting. ... Shortness of breath. ... Sweating or a cold sweat. ... No warning signs at all.

Can stress cause a heart attack?

Stress may lead to high blood pressure, which can pose a risk for heart attack and stroke. Stress also may contribute to such cardiovascular disease risks as smoking, overeating and lack of physical activity.Feb 4, 2020

Where is heart attack pain?

Catch the signs early Pay attention to your body and call 911 if you experience: Chest discomfort. Most heart attacks involve discomfort in the center of the chest that lasts more than a few minutes – or it may go away and then return. It can feel like uncomfortable pressure, squeezing, fullness or pain.

What is the first stage of a heart attack?

The first stage in a heart attack is occlusion. This is the blocking of an artery that supplies the heart muscle with blood and oxygen. Mr. H probably doesn't even realize anything is happening at this stage.

How do you know if you have a heart attack?

A heart attack can occur suddenly; signs to watch for include dizziness, shortness of breath and sweating. On the bright side, a heart attack begins healing very soon after the event, as long as the blood flow is restored.

What happens if you don't remove occlusion?

If the occlusion is not removed, then heart muscle cells begin to die. This is called infarction. Mr. H is now experiencing growing chest pain that radiates down his left arm. In his heart, more and more cells are dying due to lack of oxygen.

How long does troponin stay elevated?

The first marker is troponin. Troponin is elevated immediately and can remain elevated for 7-10 days. This is helpful to determine if an infarcted area or EKG change is new or an old myocardial infarction. As the muscle dies, a protein called CK-MB is released.

How long does it take for a heart attack to heal?

Typically, the healed phase begins about a month after the heart attack. By now the cardiac enzymes have gone back to normal levels. The size of the infarct decreases rapidly until around four months after the myocardial infarction and then continues to shrink at a slower rate. Mr. H's EKG will continue to show changes caused from his heart attack, such as a depressed ST segment or Q waves. A Q wave is the first downward depression on the EKG strip and is when the ventricles are beginning to contract. This wave appears because the electrical current is slowed by the scar tissue caused from the infarct.

What is ST segment elevation?

The ST segment is the space between the S wave and the T wave and represents the period of time right after both ventricles have contracted. Occasionally the EKG does not have changes, and then the doctors would rely on cardiac markers for diagnosis.

What is Q wave?

A Q wave is the first downward depression on the EKG strip and is when the ventricles are beginning to contract. This wave appears because the electrical current is slowed by the scar tissue caused from the infarct.