The hearts electrical activity is traced on paper.
These tracings helps the doctor in determining the rhythm of the heart and hearts chambers whether they are strained.
Certain patterns of ECG shows congenital heart disease.
ECG is done at rest or during exercise. During the ECG small sticky patches (electrodes) are placed on different areas of the chest and body. Wires leading from the electrodes to computor carry a signal that traces hearts electrical activity on a paper or on a computer.
An ECG shows 3 waves:
- P wave– electrical impulse in the upper chambers of the heart.
- QRS wave– electrical impulse in the lower chambers of the heart.
- T wave– electrical return to the rest.
It helps the doctor in determining the size of heart chambers , heart muscle damage, identify abnormal levels of certain electrolytes eg Calcium, potassium
This procedure is completely safe with no involvement of any risk.