ECG Test

What is ECG?

Electrocardiography (ECG) is a tool for diagnosing and assessing the muscular and electrical functions of the heart. In this process, electrodes are placed on the skin so as to record the normal working conditions of the heart. Alternatively, it is alsos abbreviated as EKG.

These type of electrodes usually detects the tiny form of changes in the electrical path that arises from heart muscles in the electrophysiologic patterns of the depolarizing during each heartbeat.

ECG Test

The ECG records the electrical impulse of the heart using special sensors that placed on the skin. It takes into account the strength and regularity of the electrical impulse. It is a painless and non invasive test, where the patient can get their results almost immediately. Doctors can read, as well as interpret the dips and the peaks on the paper or on the screen.

Types of ECG Test


There are three main kinds of ECG’s

Resting ECG: This type of ECG is used to examine the electrical activity of the heart at the rest position. While performing this test, the patient is asked to relax and then, their heartbeat is recorded.

Exercise ECG: This type of ECG is used to examine the electrical activity of the heart during stress or exercise. In this test, a patient is asked to run or walk on the treadmill or a cycle while the heartbeat is recorded.

24-hour ECG: As the name suggests, this type of ECG is conducted for 24 hours. The heart’s electrical impulses are measured by a device called as the Holter Monitor.

Medical Uses of ECG

The main goal of electrocardiography is to obtain information regarding about the heart’s electrical impulses. This means it can find evidence of past heart attacks or even any undiagnosed heart disease. The medical uses of such information are very valuable and grants a deeper insight into conditions like :

  • Seizures
  • Fainting
  • Pulmonary embolism
  • Cardiac dysrhythmias
  • Myocardial infarction or heart attack
  • Arrhythmia
  • Deep vein thrombosis
  • Ventricular hypertrophy

It also proves itself useful in applications such as:

  • Biotelemetry of the patient
  • The testing of Cardiac stress
  • Diagnosis of structural heart diseases
  • Monitoring the effects of heart medication
  • Assessing the severity of the abnormalities in the electrolyte
  • The monitoring of the form of anesthesia that is involved
  • CTA- Computed tomography angiography and also the MRA- Magnetic resonance angiography of heart
  • The screening of Hypertrophic cardiomyopathy in the adolescents as a part of the sports-related deaths, such as sudden cardiac death.

To know more about ECG and heart disease, visit Byju’s.

Further Reading

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