Electrocardiogram
An electrocardiogram (ECG or EKG) is a record of the electrical activity of the heart over a period of time. The instrument that makes the record is the ECG machine or Electrocardiograph. Willem Einthoven invented it. It works by attaching electrodes to the outer surface of the skin.
An electrocardiogram monitors the heart. Each beat of the heart is triggered by an electrical impulse, normally generated from special cells in the upper right chamber of the heart. An electrocardiogram records these electrical signals as they travel through the heart. Doctors can use an electrocardiogram to look for patterns among these heartbeats and rhythms to diagnose various heart conditions.
ECG is used to measure the rate and regularity of heartbeats, the size and position of the chambers, the presence of any damage to the heart, and the effects of drugs or devices used to regulate the heart, such as an artificial pacemaker.
An electrocardiogram is a painless test. The results of your electrocardiogram will likely be reported immediately after it is done.
Electrocardiogram Media
Use of real time monitoring of the heart in an intensive care unit in a German hospital (2015), the monitoring screen above the patient displaying an electrocardiogram and various values of parameters of the heart like heart rate and blood pressure
Normal 12-lead electrocardiogram (ECG)*Device: Nihon Kohden Corporation
A 12-lead ECG of a 26-year-old male with an incomplete right bundle branch block (RBBB)
A patient undergoing an ECG
A sensor for an EKG
The limb leads and augmented limb leads (Wilson's central terminal is used as the negative pole for the latter in this representation)
Spatial orientation of EKG leads
Diagram showing the contiguous leads in the same color in the standard 12-lead layout
