ECG Made Easy - Glossary (O-W)

Pacemaker malfunction that results from inappropriate sensing of extraneous electrical signals

First wave in the cardiac cycle; represents atrial depolarization and the spread of the electrical impulse throughout the right and left atria

Period between two consecutive paced events in the same cardiac chamber; also known as automatic interval

Batter-powered device that delivers an electrical current to the heart to stimulate depolarization

Of the heart's electrical conduction system, capable of spontaneously generating and conducting electrical impulses

2 consecutive complexes

Unpleasant awareness of one's heartbeat

AT that starts or ends suddenly

Regular, narrow-QRS tachycardia that starts OR ends suddenly; also called (PAT)

Double-walled sac that encloses the heart and helps protect it from trauma and infection

To the flow of blood determined by blood vessel diameter and the tone of the vascular musculature

Ability of a membrane channel to allow passage of electrolytes once it is open

Period after repolarization of a myocardial cell (also called the resting state) when the outside of the cell is positive and the interior of the cell is negative

Varying in shape

Describe rhythm that originate from above the ventricles but in which the impulse travels by a pathway other than the AV node and bundle of HIS; supraventricular impulse excites the ventricles earlier than normal