Filed under: Heart & Vascular
A heart attack usually occurs when a blood clot blocks the flow of blood through a coronary artery — a blood vessel that feeds blood to a part of the heart muscle. Interrupted blood flow to your heart can damage or destroy a part of the heart muscle.
A heart attack, also called a myocardial infarction, can be fatal. This is often because people confuse their symptoms with a minor illness, like indigestion, and delay going to the hospital. They try to tough out their symptoms and receive treatment too late. Treatment for heart attack has improved dramatically over the years. It is crucial to promptly recognize symptoms and call 911 or emergency medical help if you think you might be having a heart attack.
Your overall lifestyle — what you eat, how often you exercise and the way you deal with stress — plays a role in your recovery from a heart attack. In addition, a healthy lifestyle can help you prevent a heart attack by controlling risk factors that contribute to the narrowing of the coronary arteries that supply blood to your heart.
©1998-2012 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Read this article on Mayoclinic.com.
Common heart attack symptoms include:
Additional, or different, heart attack signs and symptoms in women may include:
Heart attack symptoms vary
Not all people who have heart attacks experience the same symptoms or experience them to the same degree. Many heart attacks aren't as dramatic as the ones you've seen on TV. Some people have no symptoms at all. Still, the more signs and symptoms you have, the greater the likelihood that you may be having a heart attack.
A heart attack can occur anytime — at work or play, while you're resting, or while you're in motion. Some heart attacks strike suddenly, but many people who experience a heart attack have warning signs and symptoms hours, days or weeks in advance. The earliest warning of a heart attack may be recurrent chest pain (angina) that's triggered by exertion and relieved by rest. Angina is caused by a temporary decrease in blood flow to the heart.
Many people confuse a heart attack with a condition in which your heart suddenly stops (sudden cardiac arrest). Sudden cardiac arrest occurs when an electrical disturbance in your heart disrupts its pumping action and causes blood to stop flowing to the rest of your body. Heart attack is the most common cause, but not the only cause, of cardiac arrest.
When to see a doctor
During a heart attack, act immediately. Many people wait too long because they don't recognize the important signs and symptoms. Take these steps:
What to do if you see someone having a heart attack
If you encounter someone who is unconscious from a presumed heart attack, call for emergency medical help. If you have received training in emergency procedures, begin cardiopulmonary resuscitation (CPR). This helps deliver oxygen to the body and brain.
According to guidelines by the American Heart Association, regardless of whether you've been trained, you should begin CPR with chest compressions. Press down about two inches (about five centimeters) on the person's chest for each compression at a rate of about 100 a minute. If you've been trained in CPR, check the person's airway and deliver rescue breaths after every 30 compressions. If you haven't been trained, continue doing compressions only.
In the initial minutes, a heart attack can also trigger ventricular fibrillation, a condition in which the heart quivers uselessly. Without immediate treatment, ventricular fibrillation leads to sudden death. The timely use of an automatic external defibrillator (AED), which shocks the heart back into a normal rhythm, can provide emergency treatment before a person having a heart attack reaches the hospital.
©1998-2012 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Read this article on Mayoclinic.com.
A heart attack occurs when one or more of the arteries supplying your heart with oxygen-rich blood (coronary arteries) become blocked. Over time, a coronary artery can become narrowed from the buildup of cholesterol. This buildup — collectively known as plaques — in arteries throughout the body is called atherosclerosis.
During a heart attack, one of these plaques can rupture and a blood clot forms on the site of the rupture. If the clot is large enough, it can completely block the flow of blood through the artery. When your coronary arteries have narrowed due to atherosclerosis, the condition is known as coronary artery disease. Coronary artery disease is the underlying cause of most heart attacks.
An uncommon cause of a heart attack is a spasm of a coronary artery that shuts down blood flow to part of the heart muscle. Drugs, such as cocaine, can cause such a life-threatening spasm. A heart attack can also occur due to a tear in the heart artery (coronary artery dissection). Other uncommon causes of heart attack include small blood clots or tumors that have traveled from other parts of the body (coronary embolism).
A heart attack is the end of a process that typically evolves over several hours. With each passing minute, more heart tissue is deprived of blood and deteriorates or dies. However, if blood flow can be restored in time, damage to the heart can be limited or prevented.
©1998-2012 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Read this article on Mayoclinic.com.
Certain factors contribute to the unwanted buildup of fatty deposits (atherosclerosis) that narrows arteries throughout your body, including arteries to your heart. You can improve or eliminate many of these risk factors to reduce your chances of having a first or subsequent heart attack.
Heart attack risk factors include:
©1998-2012 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Read this article on Mayoclinic.com.
Heart attack complications are often related to the damage done to your heart during a heart attack. This damage can lead to the following conditions:
©1998-2012 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Read this article on Mayoclinic.com.
If you're having a heart attack, it will usually be diagnosed in an emergency setting, rather than at a doctor's appointment. However, if you're concerned about your risk of having a heart attack, make an appointment with your doctor to check your risk factors and talk about preventing a heart attack. Eventually, however, you may be referred to a heart specialist (cardiologist).
Because appointments can be brief, and because there's often a lot of ground to cover, it's a good idea to be prepared for your appointment. Here's some information to help you get ready for your appointment, and what to expect from your doctor.
What you can do
Your time with your doctor is limited, so preparing a list of questions will help you make the most of your time together. List your questions from most important to least important in case time runs out. During a visit to your doctor to discuss heart attack prevention, some basic questions to ask your doctor include:
In addition to the questions that you've prepared to ask your doctor, don't hesitate to ask questions during your appointment at any time that you don't understand something.
What to expect from your doctor
Your doctor is likely to ask you a number of questions. Being ready to answer them may reserve time to go over any points you want to spend more time on. Your doctor may ask:
What you can do in the meantime
It's never too early to make healthy lifestyle changes, such as quitting smoking, eating healthy foods and becoming more physically active. These are primary lines of defense against having a heart attack.
©1998-2012 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Read this article on Mayoclinic.com.
Ideally, your doctor should screen you during regular physical exams for risk factors that can lead to a heart attack.
If you're having a heart attack or suspect you're having one, your diagnosis will likely happen in an emergency setting. You'll be asked to describe your symptoms and will have your blood pressure, pulse and temperature checked. You'll be hooked up to a heart monitor and will almost immediately start to have tests done to see if you are indeed having a heart attack.
The medical staff will listen to your heart and lung sounds with a stethoscope. You'll be asked about your health history and the history of heart disease in your family. Tests will help check if your signs and symptoms, such as chest pain, signal a heart attack or another condition. These tests include:
Additional tests
If you've had a heart attack or one is occurring, doctors will take immediate steps to treat your condition. You may also undergo these additional tests:
Exercise stress test. In the days or weeks following your heart attack, you may also undergo a stress test. Stress tests measure how your heart and blood vessels respond to exertion. You may walk on a treadmill or pedal a stationary bike while attached to an ECG machine. Or you may receive a drug intravenously that stimulates your heart similar to exercise.
Stress tests help doctors decide the best long-term treatment for you. If your doctor also wants to see images of your heart while you're exercising, he or she may order a nuclear stress test, which is similar to an exercise stress test, but uses an injected dye and special imaging techniques.
Cardiac computerized tomography (CT) or magnetic resonance imaging (MRI). These tests can be used to diagnose heart problems, including the extent of damage from heart attacks. In a cardiac CT scan, you lie on a table inside a doughnut-shaped machine. An X-ray tube inside the machine rotates around your body and collects images of your heart and chest.
In a cardiac MRI, you lie on a table inside a long tube-like machine that produces a magnetic field. The magnetic field aligns atomic particles in some of your cells. When radio waves are broadcast toward these aligned particles, they produce signals that vary according to the type of tissue they are. The signals create images of your heart.
©1998-2012 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Read this article on Mayoclinic.com.
What to do if you see someone having a heart attack
If you encounter someone who is unconscious from a presumed heart attack, call for emergency medical help. If you have received training in emergency procedures, begin cardiopulmonary resuscitation (CPR). This helps deliver oxygen to the body and brain.
Regardless of whether you've been trained, you should begin CPR with chest compressions. Press down about two inches (about five centimeters) on the person's chest for each compression at a rate of about 100 a minute. If you've been trained in CPR, check the person's airway and deliver rescue breaths after every 30 compressions. If you haven't been trained, continue doing compressions only.
Heart attack treatment at a hospital
If you have a heart attack, your heart attack treatment at a hospital varies depending on the situation. You may be treated with medications, undergo an invasive procedure or both — depending on the severity of your condition and the amount of damage to your heart.
Medications
With each passing minute after a heart attack, more heart tissue loses oxygen and deteriorates or dies. The main way to prevent heart damage is to restore blood flow quickly.
Medications given to treat a heart attack include:
Surgical and other procedures
In addition to medications, you may undergo one of the following procedures to treat your heart attack:
Coronary angioplasty and stenting. Emergency angioplasty opens blocked coronary arteries, letting blood flow more freely to your heart. Doctors insert a long, thin tube (catheter) that's passed through an artery, usually in your leg or groin, to a blocked artery in your heart. This catheter is equipped with a special balloon. Once in position, the balloon is briefly inflated to open up a blocked coronary artery. At the same time, a metal mesh stent may be inserted into the artery to keep it open long term, restoring blood flow to the heart. Depending on your condition, your doctor may opt to place a stent coated with a slow-releasing medication to help keep your artery open.
Coronary angioplasty is done at the same time as a coronary catheterization (angiogram), a procedure that doctors do first to locate narrowed arteries to the heart. When getting an angioplasty for heart attack treatment, the sooner the better to limit the damage to your heart.
Once blood flow to your heart is restored and your condition is stable following your heart attack, you may be hospitalized for observation.
©1998-2012 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Read this article on Mayoclinic.com.
How you live your life affects the health of your heart. Taking the following steps can help you not only prevent but also recover from a heart attack:
©1998-2012 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Read this article on Mayoclinic.com.
It's never too late to take steps to prevent a heart attack — even if you've already had one. Taking medications can reduce your risk of a subsequent heart attack and help your damaged heart function better. Lifestyle factors also play a critical role in heart attack prevention and recovery.
Medications
Doctors typically prescribe drug therapy for people who've had a heart attack or who are at high risk of having one. Medications that help the heart function more effectively or reduce heart attack risk may include:
Blood-thinning medications. Aspirin makes your blood less "sticky" and likely to clot. Doctors recommend a daily aspirin for people who've had a heart attack unless they have had an allergic reaction to aspirin or some other serious reason not to take it. If your doctor hasn't recommended that you take a daily aspirin, check with your doctor to find out why.
Doctors may prescribe aspirin and an anti-clotting drug, such as clopidogrel (Plavix), for people undergoing an angioplasty or stent procedure to open narrowed coronary arteries, both before and after the procedure.
If you're already taking aspirin due to a previous heart attack or to help prevent a heart attack, be aware that taking these blood thinners and ibuprofen (Advil, Motrin, others) at the same time may increase the risk of gastrointestinal problems and may interfere with the heart benefits of aspirin. If you need to take a pain-relieving medication for certain conditions, such as arthritis, discuss with your doctor which pain reliever is best for you.
Lifestyle changes
In addition to medications, the same lifestyle changes that can help you recover from a heart attack can also help prevent future heart attacks. These include:
©1998-2012 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Read this article on Mayoclinic.com.
Having a heart attack is a scary experience. Even if your doctor says you're OK, you may still be afraid. How will this affect your life? Will you be able to get back to work or resume activities you enjoy? Even more frightening — will it happen again?
Fear is just one of the many emotions you and your family must deal with. Other emotions that can be particularly difficult to cope with after a heart attack may include:
These feelings are common, and openly discussing them with your doctor, a family member or a friend may help you better cope. You need to take care of yourself mentally as well as physically after a heart attack. Exercising and participating in cardiac rehabilitation sessions with other people who are recovering from a heart attack may help you work through these feelings.
Cardiac rehabilitation
The goal of emergency treatment of a heart attack is to restore blood flow and save heart tissue. The purpose of subsequent treatment is to promote healing of your heart and prevent another heart attack.
Many hospitals offer cardiac rehabilitation programs that may start while you're in the hospital and, depending on the severity of your attack, continue for weeks to months after you return home. Cardiac rehabilitation programs generally focus on three main areas — medications, lifestyle changes and emotional issues.
Sex after a heart attack
Many people worry that sex after a heart attack will be too strenuous on their hearts. However, most people can safely return to sexual activity after recovering from a heart attack. Each person has a different timeline, depending on his or her level of physical comfort, psychological readiness and previous sexual activity.
The demands that sexual intercourse place on your heart approximate those of taking a brisk walk, scrubbing a floor, or climbing one or two flights of stairs. In a way, sexual activity parallels any other physical exertion — your heart rate, breathing rate and blood pressure increase. Ask your doctor when it's safe to resume sexual activity. With time, you'll likely be able to resume your normal sexual patterns.
Some heart medications, such as beta blockers, may affect sexual function. However, sexual dysfunction following a heart attack is more often due to depression or anxiety than to medications. If you're having problems with sexual dysfunction, talk to your doctor. He or she may be able to help you pinpoint the problem and seek the appropriate treatment.
Ask questions
You and your family may have a lot of questions and concerns following your heart attack. If so, it might be helpful to talk to others who are experiencing some of the same things as you and your family. Many cardiac rehabilitation programs offer counseling services and support groups for heart attack survivors.
Surviving a heart attack doesn't mean that life as you knew it is over. On the contrary, many people can lead full, active lives after a heart attack. But it may mean making some positive changes in your daily habits, being patient as you recover and adopting a can-do attitude.
©1998-2012 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Read this article on Mayoclinic.com.

Want to know more about this article or other health related issues? Ask your question and we'll post some each week for CNN.com reader to discuss or for our experts to weight in.

| Most Viewed | Most Emailed | Top Searches |

