RCES Exam Questions All 100% Solved
solutions
What ionic flows occur across the cardiac muscle cell membrane during the
plateau (phase 2) of the action potential? - ANSWER>>Ca++ enters, K+ exits
What is the response of cardiac tissues paced during the relative refractory period
(RRP)? Compared to fully depolarized cells, stimulation in the RRP ______ -
ANSWER>>require higher mA but creates a weaker contraction
What is required to sustain a reentry circuit? - ANSWER>>- two parallel pathways
connected proximally and distally
- one pathway conducts slower than the other
-one pathway has a longer refractory period
Overdrive suppression - ANSWER>>The pause after rapid atrial pacing ceases
(The pause induced in an automatic focus by a temporarily overdriving pacemaker
The "triggered" mechanism may cause... - ANSWER>>an arrhythmia
What mechanism causes triggered arrhythmias? - ANSWER>>After depolarization
Triggered arrhythmias are often associated with... - ANSWER>>digitalis toxicity or
elevated inter ventricular Ca++ levels
Which arrhythmia most closely resembles an "itch of the heart" in acutely ill
patients? - ANSWER>>Automatic arrhythmias
What information does the "stem" channel contain? - ANSWER>>A pacing output
, What french size is a catheter with an outer diameter of 2.66 mm? - ANSWER>>8
French
The outside diameter of a 5.5 fr catheter is... - ANSWER>>1.83 mm
Closely spaced bipolar cardiac electrodes record local... -
ANSWER>>depolarization only (phase 0)
Surface ECG leads are usually filtered at - ANSWER>>0.1 to 100 Hz
Normal EGM filter settings for bipolar EP catheters are... - ANSWER>>30-300 Hz
If large T waves in an electro gram interfere with A or V wave recognition you
should... - ANSWER>>raise the high-pass filter
A porous tip steroid-emitting tip on a pacemaker lead is beneficial because they
reduce the acute... - ANSWER>>-Stimulation threshold
-inflammation reaction
Compared to the permanent pacemaker, the temporary pacer has... -
ANSWER>>constant current and generated up to 20 volts
When connecting a bipolar pacing lead to the PSA or pulse generator, the distal
electrode should be connected to the ________ terminal. - ANSWER>>black
active negative terminal
During typical AFL ablation it is best to use_______ RF catheters to prevent
_______ - ANSWER>>- cooled,
- pulmonary embolism
The most anterior heart valve is the - ANSWER>>pulmonary valve
The CS os is located - ANSWER>>posterior to the tricuspid valve
solutions
What ionic flows occur across the cardiac muscle cell membrane during the
plateau (phase 2) of the action potential? - ANSWER>>Ca++ enters, K+ exits
What is the response of cardiac tissues paced during the relative refractory period
(RRP)? Compared to fully depolarized cells, stimulation in the RRP ______ -
ANSWER>>require higher mA but creates a weaker contraction
What is required to sustain a reentry circuit? - ANSWER>>- two parallel pathways
connected proximally and distally
- one pathway conducts slower than the other
-one pathway has a longer refractory period
Overdrive suppression - ANSWER>>The pause after rapid atrial pacing ceases
(The pause induced in an automatic focus by a temporarily overdriving pacemaker
The "triggered" mechanism may cause... - ANSWER>>an arrhythmia
What mechanism causes triggered arrhythmias? - ANSWER>>After depolarization
Triggered arrhythmias are often associated with... - ANSWER>>digitalis toxicity or
elevated inter ventricular Ca++ levels
Which arrhythmia most closely resembles an "itch of the heart" in acutely ill
patients? - ANSWER>>Automatic arrhythmias
What information does the "stem" channel contain? - ANSWER>>A pacing output
, What french size is a catheter with an outer diameter of 2.66 mm? - ANSWER>>8
French
The outside diameter of a 5.5 fr catheter is... - ANSWER>>1.83 mm
Closely spaced bipolar cardiac electrodes record local... -
ANSWER>>depolarization only (phase 0)
Surface ECG leads are usually filtered at - ANSWER>>0.1 to 100 Hz
Normal EGM filter settings for bipolar EP catheters are... - ANSWER>>30-300 Hz
If large T waves in an electro gram interfere with A or V wave recognition you
should... - ANSWER>>raise the high-pass filter
A porous tip steroid-emitting tip on a pacemaker lead is beneficial because they
reduce the acute... - ANSWER>>-Stimulation threshold
-inflammation reaction
Compared to the permanent pacemaker, the temporary pacer has... -
ANSWER>>constant current and generated up to 20 volts
When connecting a bipolar pacing lead to the PSA or pulse generator, the distal
electrode should be connected to the ________ terminal. - ANSWER>>black
active negative terminal
During typical AFL ablation it is best to use_______ RF catheters to prevent
_______ - ANSWER>>- cooled,
- pulmonary embolism
The most anterior heart valve is the - ANSWER>>pulmonary valve
The CS os is located - ANSWER>>posterior to the tricuspid valve
