An ECG is a common test often performed during routine check-ups or to diagnose heart diseases. However, what exactly is this test? Moreover, what does it reveal?


What is an ECG?

Electrocardiogram or you may hear it called ECG or EKG is a test that records the electrical activity of the heart. It helps detect and diagnose many heart problems, such as heart rhythm disturbances, clots, and angina. (1)

The results are presented in the form of an electrocardiogram, which consists of waves. Each wave has a specific significance with regard to the heartbeat and the functioning of the heart. This enables doctors to diagnose cardiac issues and to monitor them closely. (1)


What are the reasons for performing an ECG?

The ECG is usually... The first test done if you have signs that you have a heart condition, including: (2)

  • Chest Pain
  • Rapid or irregular heartbeat.
  • Shortness of breath.
  • Dizziness.
  • Tiredness and exhaustion after a slight effort.
  • Lack of normal movement.


An examination is also performed for these reasons: (2)

  • Monitor your heart health if you have heart disease, or have previously had a heart attack.
  • Evaluate the effectiveness of the treatments you are receiving, including medications or pacemakers.
  • Make sure your heart is healthy before having surgery.
  • If you are at risk of heart disease; Due to a family history of heart disease, or other risk factors, such as diabetes, hypertension, smoking, etc.




Whether you are suffering from a heart disease or experiencing any abnormal heart symptoms, visit the Emergency Department or the Cardiac Care Unit at Al-Ahli Hospital, a leading destination for cardiac care in Qatar and the Arab world.




What conditions does the ECG reveal?

The examination helps Diagnosis and follow-up of many heart problems, like: (2)

  • Arrhythmias.
  • Heart attack and angina pectoris.
  • Coronary artery disease.
  • Heart failure.
  • Cardiomyopathy.
  • Valve problems.
  • Congenital heart defects.


How is an ECG performed?

Examination Easy, simple, and painless the method for conducting it simply includes the following: (3)

  • The examination is usually performed while lying comfortably on your back.
  • Electrodes, usually 12 total, are placed on different areas of your body, including your chest, arms, and legs, and are attached with medical adhesives.
  • These electrodes contain sensors that monitor the electrical activity of your heart.
  • The results of the examination are recorded directly on chart paper, where the doctor or specialist technician interprets and reads them.
  • The scan takes only 5 to 10 minutes.



There are several Types of ECG Depending on your condition and symptoms, including: (4)

  • ECG at rest: This is the most common type, performed while you are at complete rest.
  • ECG with stress: This type used to assess how your heart functions during physical activity. You may be asked to walk on a treadmill while your heart's electrical activity is recorded.
  • 24-hour ECG: You are asked to wear a small portable device that records your heart's electrical activity over a 24-hour period.


If the results show an abnormal heartbeat, you may be asked for further tests; to discover the cause of the problem.


How does an ECG differ from a cardiac echo?

Echo is another common test that provides an animated image of the heart and its valves on an adjacent monitor through ultrasound it helps diagnose heart diseases, such as valve disease, cardiomyopathy, cardiomegaly, etc. (5)


References