Question

what is electrocardiogram

Answer 1

An electrocardiogram (EKG or ECG) is a test that checks for problems with the electrical activity of your heart. An EKG shows the heart's electrical activity as line tracings on paper. The spikes and dips in the tracings  are called waves.The heart is a muscular pump made up of four chambers . The two upper chambers are called atria. The two lower chambers are called ventricles. A natural eletrical system  causes the heart muscle to contract. This pumps blood through the heart to the lungs and the rest of the body.

Answer 2

Answer :-

In general terms, "Electrocardiogram" can be defined as the recording of the electrical charges that accompany the cardiac cycle.

Extra Information :-

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• "Electrocardiograph" is the instrument which is used to record potential differences of the muscles of the heart.

• The Electrocardiograph was developed from the string galvanometer invented by the Dutch physiologist - "Willem Eithoven".

• A normal ECG consists of a P wave, a QRS complex and a T wave.

• The first wave called the P wave is a upward deflection and represents "Atrial depolarization".

• The second wave called the QRS complex, begins as a downward deflection, continues as a large upright triangular wave and ends in a downward wave.

• The QRS complex represents "Rapid ventricular depolarization".

• The QRS complex is related to ventricular systole (contraction).

• The third wave called the T wave is a dome-shaped upward deflection which indicates ventricular repolarization.