IBHRE TEST BANK EXAM PREP QUESTIONS AND A
NEW UPDATED STUDY GUIDE WITH COMPLETE
ACTUAL QUESTIONS AND CORRECT VERIFIED
ANSWERS (LATEST UPDATED VERSIONS)
|GUARANTEED PASS. (FULL REVISED EXAM
Cardiology
AVRT (Atrioventricular reentrant tachycardia)
av conduction and accessory pathway create a reentrant circuit
causing tachycardia
AVNRT (AV nodal reentrant tachycardia)
This occurs when a reentrant circuit occurs in the AV node. A
premature beat reactivates the slow pathway and creates a loop
with the fast pathway after its refractory period. this rhythm
accounts for 60% of SVT and paroxysmal AT/AF. the rhythm will
have a narrow QRS and have a rate of about 150-200 bpm
AVNRT treatment
-Catheter ablation of the slow pathway
,AVNRT - symptoms
palpitations, neck throbbing, polyuria, syncope
Adenosine with AVNRT
this helps differentiate AVNRT from AT. If AV block is produced but A
rhythm remains its AT
Rheobase
the lowest threshold possible on the strength/duration curve
Chronoxie
the pulse width on the strength duration curve where the rheobase
x 2 is the point for the stimulus strength. This is the most efficient
pulse width
charge
current x time (mC)
energy
current x voltage x time (mJ)
,ANP/BNP (atrial natriuretic peptide) increases
Substance produced by atrium when its subjected to a higher
pressure, point to VVIR pacing and loss of capture as culprit
transient or 1 beat inhibition with device
-arc welding
-electronic article surveillance
-cellphones
-airport metal detectors
-nerve stimulators
-electric shavers
-blankets
-tv
-can opener
-CB/HAM radio
-power tools
-metal detector
can cause damage to device
MRI, Defibrillation, CV, Cautery, radiation therapy
Ohm's Law
V=IR
, insulation breach
resistance is in parallel (decreased resistance of a lead)
All permanent ppms are ___________
constant voltage devices
Constant current devices
Small load applied to a circuit (low impedance)
Constant Voltage Devices
Large load applied to a circuit (high impedance)
Indications for a pacemeker
-symptomatic patient
-heart rate less than 40 bpm
-asystole greater than 3 sec
Slew Rate
peak slope of an electrogram signal (voltage/time) (dV/dt)
NEW UPDATED STUDY GUIDE WITH COMPLETE
ACTUAL QUESTIONS AND CORRECT VERIFIED
ANSWERS (LATEST UPDATED VERSIONS)
|GUARANTEED PASS. (FULL REVISED EXAM
Cardiology
AVRT (Atrioventricular reentrant tachycardia)
av conduction and accessory pathway create a reentrant circuit
causing tachycardia
AVNRT (AV nodal reentrant tachycardia)
This occurs when a reentrant circuit occurs in the AV node. A
premature beat reactivates the slow pathway and creates a loop
with the fast pathway after its refractory period. this rhythm
accounts for 60% of SVT and paroxysmal AT/AF. the rhythm will
have a narrow QRS and have a rate of about 150-200 bpm
AVNRT treatment
-Catheter ablation of the slow pathway
,AVNRT - symptoms
palpitations, neck throbbing, polyuria, syncope
Adenosine with AVNRT
this helps differentiate AVNRT from AT. If AV block is produced but A
rhythm remains its AT
Rheobase
the lowest threshold possible on the strength/duration curve
Chronoxie
the pulse width on the strength duration curve where the rheobase
x 2 is the point for the stimulus strength. This is the most efficient
pulse width
charge
current x time (mC)
energy
current x voltage x time (mJ)
,ANP/BNP (atrial natriuretic peptide) increases
Substance produced by atrium when its subjected to a higher
pressure, point to VVIR pacing and loss of capture as culprit
transient or 1 beat inhibition with device
-arc welding
-electronic article surveillance
-cellphones
-airport metal detectors
-nerve stimulators
-electric shavers
-blankets
-tv
-can opener
-CB/HAM radio
-power tools
-metal detector
can cause damage to device
MRI, Defibrillation, CV, Cautery, radiation therapy
Ohm's Law
V=IR
, insulation breach
resistance is in parallel (decreased resistance of a lead)
All permanent ppms are ___________
constant voltage devices
Constant current devices
Small load applied to a circuit (low impedance)
Constant Voltage Devices
Large load applied to a circuit (high impedance)
Indications for a pacemeker
-symptomatic patient
-heart rate less than 40 bpm
-asystole greater than 3 sec
Slew Rate
peak slope of an electrogram signal (voltage/time) (dV/dt)
