A graphical representation of the heart's electrical activity.
Every heart beat has PQRST wave:
P wave represents the impulses passing from the SAN to the AVN through the walls of the atria.
QRS shows the electrical impulses travelling down the Bundle of His and Purkinje fibres.
T waves occur as the ventricles recover.
Normal ECG trace
Tachycardia traces show abnormally elevated heart rates, usually higher than…