Basic Principles Flashcards
The generation of pacemaking stimuli
Automaticity
SA node located
Upper posterior wall of the right atrium
Each depolarization wave emitted by the SA node spreads through both atria producing a …
P wave
The simultaneous contraction of the atria forces the blood they contain to pass through the …
Atria-Ventricular valves between the atria and the ventricles
The only conducting path between the atria and the ventricles is the…
AV node
Depolarization conducts slowly through the AV node, since it is carried by slow moving …
Ca ions
His Bundle and both bundle branches are bundles of rapidly conducting …
Purkinje fibers
Prukinje fibers use fast moving ions for the conduction. These are?
Na ions
Depolarization of the entire ventricular myocardium produces a …
QRS complex
The first downward wave of the QRS complex is the …
Q wave, is often absent on EKG
The downward Q wave is followed by an upward
R wave
Any downward wave preceded by an upward wave is an
S wave
Rapid phase of ventricular repolarization is represented by the
T wave
Begins with the QRS and persists until the end of the T wave
Ventricular systole (contraction)
As a simple rule of thumb, the QT interval is considered normal when it is less than of the R to R interval at normal rates.
Half
