Comment les maladies cardiaques sont-elles diagnostiquées?

The doctor diagnoses coronary artery disease based on personal and family medical history of the patient, risk factors, and medical examination results and test procedures.

No single test can diagnose coronary artery disease. If the doctor thinks you have this condition, you probably have one or more of the following tests.

Electrocardiogramme (ECG)

The electrocardiogram is a simple and painless test that detects and records the electrical activity of the heart. This shows how fast the heart beats and at what rate (steady or irregular). It also records the strength and timing of electrical impulses as they pass through each part of the heart.

The ECG may show signs of heart damage due to coronary heart disease and may show signs of a present or previous heart attack.

Stress test

During the stress test, you exercise for the heart to work hard and can quickly perform cardiac tests. If you can not exercise, you will receive medication to speed up your heart rate.

When the heart beat fast and fights, you need more blood and oxygen. Narrowed coronary arteries with plaque can not supply enough oxygen-rich blood to meet the needs of the heart.

Stress tests can show potential signs and symptoms of coronary heart disease, including:

Changes in heart rate or blood pressure
shortness of breath or chest pain sensation
Changes in heart rate or electrical activity of the heart
If you can not exercise for the time considered normal for a person your age, your heart can not get enough oxygen-rich blood. However, other factors may prevent you from exercising long enough (eg, lung disease, anemia, or poor physical condition).

In some stress tests, pictures are taken at heart when you train and when you rest. These diagnostic imaging stress tests can show how blood flows in different parts of the heart and how it pumps blood into barking.


In echocardiography, sound waves are used to create a moving picture of the heart. Echocardiography provides information about the size and shape of the heart and how the rooms and valves operate.

It can also identify areas of poor circulation in the heart, areas of heart muscle that do not normally contract and the previous damage to the heart muscle caused by lack of circulation.

Pulmonary radiography

Chest X-ray images are obtained of organs and structures in the chest, including the heart, lungs and blood vessels.

Chest radiographs can reveal signs of heart failure and lung disorders and other causes of symptoms that are not due to coronary heart disease.

Blood tests

Blood tests determine the blood levels of certain fats, cholesterol, sugar and protein. Abnormal levels can indicate that you are at risk of heart disease. Blood tests also can detect anemia, which is a risk factor for coronary heart disease.

During a heart attack, heart muscle cells die and release proteins in the blood. There are tests to measure the amount of these proteins in the blood. High concentrations of these proteins indicate that there has been a heart attack recently.

CT electron beam

Computed tomography, electron beam (CT) is a test used to find calcium (calcification) in the walls of coronary arteries. The calcifications are an early sign of heart disease.

The test can show if you risk more of a heart attack or other heart problem before other signs and symptoms occur.

Computed tomography, electron beam is not commonly used for the diagnosis of coronary artery disease because its accuracy is not yet known. (On the Web Health Topics site, there is an article about this test entitled "Coronary Calcium Scan").

coronary angiography and cardiac catheterization

Your doctor may recommend coronary angiography if other tests or factors indicate that you have coronary artery disease. This test uses a special contrast and X-rays to show the inside of the coronary arteries.

For the contrast medium reaches the coronary arteries, the doctor uses a procedure called cardiac catheterization

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