Cardiac electrophysiology is the science of
elucidating, diagnosing, and treating the electrical
activities of the heart.
What Is an Electrocardiogram (ECG, EKG)?
The electrocardiogram (ECG or EKG) is a diagnostic tool
that is routinely used to assess the electrical and muscular
functions of the heart. While it is a relatively simple test
to perform, the interpretation of the ECG tracing requires
significant amounts of training. Numerous textbooks are
devoted to the subject.
The heart is a two stage electrical pump and the heart's
electrical activity can be measured by electrodes placed on
the skin. The electrocardiogram can measure the rate and
rhythm of the heartbeat, as well as provide indirect
evidence of blood flow to the heart muscle.