Cardiovascular & Lymphatic - Intrinsic Conduction System

autorythmic cardiac impulses
The intrinsic conduction system consists _______________ ____________ cells that initiate and distribute _______________ throughout the heart.
heart depolarization
The intrinsic conduction system coordinates heart activity by determining the direction and speed of ________________. This leads to a coordinated heart contraction.
sets the pace for the entire heart
List the functions for the SA Node
link between the SA and AV nodes
List the functions for the Internodal Pathway
delay occurs here while atria contracts
List the functions for the AV Node
link between atria and ventricle
List the functions for the AV Bundle (Bundle of His)
convey impulse down the interventricular septum
List the functions for the Bundle Branches
convey impulse throughout the ventricular walls
Purkinje Fibers
The action potentials spread from the autorhythmic cells of the intrinsic conduction system (electrical event) to the ______________ cells. The resulting mechanical events cause a heartbeat.
A tracing of the electrical activity of the heart is called a/an ________________.
Atrial depolarisation
What do P wave forms reflect?
ventricular depolarisation
What do QRS wave forms reflect?
ventricular repolarisation
What do T wave forms reflect?
QRS interval
In a normal ECG wave tracing, atrial repolarization is hidden by ___________________.
atrial contraction
Electrical events lead to mechanical events. For example, the P wave represents ____________ depolarization, which leads to atrial _____________.
QRS interval
A left bundle branch block would have a wider than normal wave for the ____________.
An abnormally fast heart rate (over 100 beats per minute) is called