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