What is ECG?
An electrocardiogram (ECG) is a simple test that can be used to check your heart’s rhythm and electrical activity. Sensors attached to the skin are used to detect the electrical signals produced by your heart each time it beats.
What can an ECG tell you?
An ECG can help your doctor identify an unusually fast heart rate (tachycardia) or an unusually slow heart rate (bradycardia). Heart rhythm. An ECG can show heart rhythm irregularities (arrhythmias). These conditions may occur when any part of the heart’s electrical system malfunctions.
What are the 3 types of ECG?
There are three main components to an ECG:
The P wave, which represents depolarization of the atria;
The QRS complex, which represents depolarization of the ventricles;
The T wave, which represents repolarization of the ventricles.