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RCES EXAM QUESTIONS AND ANSWERS
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RCES EXAM QUESTIONS AND ANSWERS
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RCES EXAM QUESTIONS AND ANSWERS3rd degree AV block
atria and ventricles beat independently of each other
(P waves have no relation to QRS waves)
Adenosine is an example of a class ___ antiarrhythmic
Class V/ Non Classed
During phase 2 of the action potential, what ion is responsible for heart muscle contraction?
CA2+
If lead insulation is fractured, lead impedance will
Decrease
If VT originates in the LV, there will be a _____________________ morphology?
Right Bundle Branch Block (positive in lead V1)
The irregular bands of tissue projecting from the inner surfaces of the ventricles are called
Trabeculae carnea
Of the blocks listed below, which would be an indication for for a pacemaker? (Select all
that apply)
A: 1st degree heartblock
B: 2nd degree, type 1 heartblock
C: 2nd degree, type 2 heartblock
D: 3rd degree heartblock
E: Left bundle branch block more than 120ms
C, D, E
On which catheter would you first see PVCs
RV catheter Referring to equation V=IR, which relates voltage to current flow and resistance, reducing the voltage by half will do what to the resistance?
it will decrease by half
The resting membrane potential of the ventricular action potential is:
-90 to -100 mV
The second letter in the NBG Device code refers to:
chamber sensed
True of False: The AV node is located at the apex of the triangle of Koch?
True
True or False: administering adenosine will terminate Atrial Tachycardia
False
True or False: An HV interval of 120ms would be an indication for a pacemaker?
True
True or False:
A SNRT is used to evaluate the health of the AV node
False
True or False: Extra-stimulus pacing from the HRA catheter will allow you to find the patient's AERP and AVNERP
True
True or False: The absolute refractory period is the period of time when a stimulus of sufficient strength can initiate an Action Potential.
False
The two primary cardiac responses associated with a Sympatheticneural discharge are ________heart rate and _________ AV conduction
increased, increased
What 3 criteria are needed to sustain a reentry circuit?
1.) Parallel pathways that are connected proximally and distally, forming an electrical circuit 2.) One of the pathways needs a refractory period that's substantially longer than the refractory period of the other 3.) The pathway with the shorter refractory period must
conduct electrical impulse more slowly than the other pathway
What 3 structures make up the triangle of Koch?
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