Terms in this set (12)
sinoatrial (SA) node (pacemaker)
Electrical impulses occur at a rate of 60 to 100 beats per minute
atrioventricular (AV) node
Delays the electrical impulse to allow for the atria to complete their contraction and ventricles to fill before the next contraction; also serves as a secondary pacemaker if the SA node fails
bundle of His (AV bundle)
Conducts electrical impulses from the atria to the ventricles
Conduct impulses down both sides of the interventricular septum
Purkinje fibers (network)
Distribute the electrical impulses through the right and left ventricles.
atrial depolarization with resulting contraction
Ventricular depolarization and resulting ventriclular contraction.
repolarization of the bundle of His and Purkinje fibers (not always seen) may be seen in instances of electrolyte imbalance.
beginning of atrial depolarization to the beginning of ventricular depolarization
Period of time from the start of ventricular depolarization to the end of ventricular repolarization
Time between ventricular depolarization and the beginning of ventricular repolarization.