| A | B |
|---|
| cardiac | pertaining to the heart |
| cardiology | medical study of the structure, function and disorders of the heart |
| electrocardiograph | an instrument for recording the electrical activity of the heart |
| electrocardiogram | a tracing of the electric currents that initiate the heartbeat |
| electrode | a conductor through which an electric current enters or leaves a substance |
| precordial | situated in front of the heart |
| holter monitor | device used to obtain a 24-hr EKG tracing |
| arrhythmia | an irregularity in the force or rhythm of the heartbeat |
| artifact | signal interference on an EKG/ECG |
| systole | period during contraction of chambers of the heart, blood pressure is the highest |
| diastole | period of cardiac muscle relaxation, blood is filling the chambers |
| depolarization | electrical change in cells in which the inside becomes positive in relation to the outside |
