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25 Cards in this Set

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  • Back
What is the normal (bmp)range for a the SA node, AV Junction and Ventricle?
60 - 100 bmp
40 -60 bmp
20 - 40 bmp
Which cells start the electrical activity and conduct thru the heart?
Electrical Cells
What cells respond by contracting & pumping blood?
Mechanical
Name the 5 waves in a single cardiac cycle?
P, Q, R, S, AND T
What does Arrythmia mean?
"The absence of Rythm and or "abnormal heart rythm."
To evaluate a patient's cardiac function, you must assess the mechanical function by examining the _________ and ______________?
Pulse and blood pressure.
To evaluate the electrical function of the patient's heart you must do a ________?
EKG
How does the AV node function?
AV node holds the electrical impulses until the ventricles are ready to rec'v the impulse.
Arrythmias are manifestations of what activity in the heart?
Electrical activity of the heart.
When the cells are balanced resting and no electrical activity is going on. This is called?
Polarized state and for action phase.
This is refers to the process of electrical discharge and flow of electrical activity and when the cells (Na/K) trade places?
Depolarization which is called the "discharge" state.
The return of electrical charges to their original state and also called the "recovery" state means?
Repolarization.
This means when cells can discharge an electrical current without an external stimulus?
automaticity.
A rule regarding the pacemaker function of the heart is that the site that initiates impulses the fastest rate will?
Will usually become the pacemaker.
If these 2 branches of the nervous system are not balanced can cause an increase in the heart rate & increase irratability?
Sympathetic and parasympathetic branches.
What process is responsible for a site speeding up and overriding a higher site, thus taking over a pacemaker?
irritability.
How does the electrical and mechanical cells work together to produce cardiac activity?
The stimulate the muscles cells to contract.
What happens when the positive & negative electrical electrical cells exchange places across the cell membrane of a cardiac cell?
It initiates the flow of electrical flow.
List the areas of the conduction system in the order in which the impulses travel thru the heart?
1. SA node
2. interatrial/internodal pathways
3. AV node
4. Bundle of his
5. Left/right bundle branches
6. Purkinje fibers
What mechanism is in play if a lower site takes over for the pace-making function following failure of a higher site?
escape.
Which nervous system has two branches that control the activities of the heart?
autonomic.
What part of the heart does the sympathetic branch innervate?
atria & ventricles.
What part of the heart does the parasympathetic branch innervate?
only the atria.
What happens of one branch is blocked- sympathetic or parasympathetic branches?
The opposing branch will control the heart.
Is depolarization the same as contraction?
No. depolarization is electrical current and contraction is mechanical and follows depolarization.