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ACS ranges from a heart attack (myocardial infarction) to unstable angina.

Heart attack (myocardial infarction)

If you have a heart attack, a coronary artery or one of its smaller branches is suddenly blocked. The part of the heart muscle supplied by this artery loses its blood (and oxygen) supply. This part of the heart muscle is at risk of dying unless the blockage is quickly undone. (The word infarction means death of some tissue due to a blocked artery which stops blood from getting past.) In addition to being known as a heart attack, a myocardial infarction is sometimes called a coronary thrombosis.

Heart attack (myocardial infarction)

Three types of angina:

Stable angina

Unstable angina

Variant angina

Classic angina

Crescendo angina

Prinzmetal angina

Three types of angina

Unstable angina

Unstable angina occurs when the blood clot causes a reduced blood flow but not a total blockage. This means that the heart muscle supplied by the affected artery does not die (infarct).



Understanding the heart and coronary arteries

The heart is made mainly of special muscle. The heart pumps blood into blood vessels (arteries) which take the blood to every part of the body.
The coronary arteries supply oxygen-rich blood to the heart If these arteries are narrowed or blocked, the heart does not get enough oxygen.

This can cause angina or a heart attack. The blockage can be sudden and complete, or it can come and go – clot, break open, then clot again. “In either case, the heart tissue is dying, even if it’s just a few cells or a whole big section of the heart,” Bolger said.

Like any other muscle, the heart muscle needs a good blood supply. The coronary arteries take blood to the heart muscle. The main coronary arteries branch off from the aorta. The aorta is the large artery which takes oxygen-rich blood from the heart chambers to the body. The main coronary arteries divide into smaller branches which take blood to all parts of the heart muscle.

Understanding the heart and coronary arteries


Your doctor will ask you many questions about your symptoms and medical history. You will be asked about any conditions you have that may cause heart failure (such as coronary artery disease, angina, diabetes, heart valve disease, and high blood pressure). You will be asked if you smoke, take drugs, drink alcohol (and how much you drink), and about what drugs you take.

How Is Heart Failure Diagnosed?

You will also get a complete physical exam

Your doctor will listen to your heart and look for signs of heart failure as well as other illnesses that may have caused your heart muscle to weaken or stiffen.

Your doctor may also order other tests to determine the cause and severity of your heart failure. These include:

Blood tests

Blood tests are used to evaluate kidney and thyroid function as well as to check cholesterol levels and the presence of anemia. Anemia is a blood condition that occurs when there is not enough hemoglobin (the substance in red blood cells that enables the blood to transport oxygen through the body) in a person’s blood.

B-type Natriuretic Peptide (BNP) blood test

BNP is a substance secreted from the heart in response to changes in blood pressure that occur when heart failure develops or worsens. BNP blood levels increase when heart failure symptoms worsen, and decrease when the heart failure condition is stable. The BNP level in a person with heart failure — even someone whose condition is stable — is higher than in a person with normal heart function. BNP levels do not necessarily correlate with the severity of heart failure.

Chest X-ray

A chest X-ray shows the size of your heart and whether there is fluid build-up around the heart and lungs.

Echocardiogram

This test is an ultrasound which shows the heart’s movement, structure, and function.

The Ejection Fraction (EF) is used to measure how well your heart pumps with each beat to determine if systolic dysfunction or heart failure with preserved left ventricular function is present. Your doctor can discuss which condition is present in your heart.

Echocardiogram

Electrocardiogram (EKG or ECG)

An EKG records the electrical impulses traveling through the heart.

Cardiac catheterization

This invasive procedure helps determine whether coronary artery disease is a cause of congestive heart failure.

Stress Test

Stress Test

Noninvasive stress tests provide information about the likelihood of coronary artery disease.

Other tests may be ordered, depending on your condition.



Emirates Cardiac Society

SHARING MATTERS OF HEART

SHARING MATTERS OF HEART




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Emirates Cardiac Society (ECS) is a non-profit organization comprising of cardiologists within the UAE that work under the umbrella of the Emirates Medical Association.


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