IBHRE Exam Questions with complete
solutions(2024-2025)
Lithium jiodine jbattery jV? j- jANS✓✓-2.8V- jnot jused jfor jICDs jdue jto jlow jpeak
jpower. jQmr
Lithium jIodine/ jsilver jV? j- jANS✓✓-3.2V jQhr- jused jfor jICDS
Which jis jan jexample jof ja jclosed jloop jsensor? j- jANS✓✓-myocardial
jcontractility jand jO2 jstat
Primary jSensor j- jANS✓✓-detects jchanges jin jnormal jphysiologic jresponses
Secondary j- jANS✓✓-detects jinternal jchanges jfrom jexercise- jQT jMV jpH
Tertiary j- jANS✓✓-detects jchanges jas ja jresult jof jexercise- jpiezo jaccelerometer
The jsmaller jthe jcathode jsurface jthe- j- jANS✓✓-higher jthe jcurrent jdensity,
jlower jthe jthreshold, jand jhigher jthe jimpedance j(2-6mm jas jsmall jas j1.2)
Anode jshould jbe jhow jmuch jbigger jthan jthe jcathode? j- jANS✓✓-3xs j(4-20mm
jin jpacing jleads)
ICD jtip jelectrodes jtend jto jrun- j- jANS✓✓-2-10mm
Rv jcoil jsize? j- jANS✓✓-300-600mm
SVC jcoil jsize? j- jANS✓✓-400-860mm
OHMS jLAW j- jANS✓✓-V=I j* jR
ENERGY jEQUATION j(uJ) j- jANS✓✓-V j* jI* jPW
I jis jwhat? j- jANS✓✓-Current- jflow jof jelectrons jthrough ja jcircuit
What jcan jcause jincrease jin jthreshold, jwide jQRS, jlatency, jand jundersensing? j-
jANS✓✓-Hyperkalemia- jhigh jlevels jof jpotassium
, Hypercalcemia jcan jresult jin? j- jANS✓✓-Short jQT
Hypocalcemia jcan jresult jin? j- jANS✓✓-Long jQT
Normal jPotassium jlevel? j- jANS✓✓-3.7-5.2
estimated jbattery jlife? jTime= j- jANS✓✓-Time= jQ j(battery jcapacity jin jAh) j/ jI j(
jcurrent jdrain jin jamperes)
Which jof jthe jfollowing jis jnecessary jto jinitiate jreentry jtachy? j- jANS✓✓-
unidirectional jblock jof jone jpathway j(travels jdown jthe jslow jup jthe jfast) jcan jbe
jlarge j(WPW) jor jsmall j(AVNRT)
Slew jRate j- jANS✓✓-max jrate jof jchange jbetween jthe jsensing jelectrode jand
jfirst jderivative jon jECG j
change jin jV/ jChange jin jTIme
Frequency j- jANS✓✓-# jof jtimes ja jsignal jfluctuates jin j1 jsec jexpressed jin jhertz
The jBasic jUnit jof jCapacitance jis? j- jANS✓✓-Farad
Basic jUnit jof jEnergy? j- jANS✓✓-Joule
Unit jof jcharge? j- jANS✓✓-Coulomb= j1 jamp jper jsecond
Microvolt jT jwave jtesting j- jANS✓✓-measures jbeat jto jbeat jvariations jin jthe jT
jwave, jperformed jwith jexercise jideally jhr jbetween j105 jand j110
Heart jRate jturbulence j- jANS✓✓-looks jat j10 jto j20 jbeats jfollowing ja jPVC.
jabsence jof jit jis jthe jbest jnon jinvasive jprediction jof jcardiac jmortality jfollowing
ja jMI
Fluoroquinolone jantibiotic jis jknown jfor jwhat jcardiac jeffect? j- jANS✓✓-
prolonging jthe jQT
Zener jDiode j- jANS✓✓-protects jthe jpacemaker jcircuitry jfrom jhigh jexternal
jvoltages
rheobase j- jANS✓✓-lowest jpossible jvoltage jthat jwill jstimulate jthe jmyocardium
jat jany jpulse jduration
chronaxie j- jANS✓✓-twice jthe jrheobase jvoltage
solutions(2024-2025)
Lithium jiodine jbattery jV? j- jANS✓✓-2.8V- jnot jused jfor jICDs jdue jto jlow jpeak
jpower. jQmr
Lithium jIodine/ jsilver jV? j- jANS✓✓-3.2V jQhr- jused jfor jICDS
Which jis jan jexample jof ja jclosed jloop jsensor? j- jANS✓✓-myocardial
jcontractility jand jO2 jstat
Primary jSensor j- jANS✓✓-detects jchanges jin jnormal jphysiologic jresponses
Secondary j- jANS✓✓-detects jinternal jchanges jfrom jexercise- jQT jMV jpH
Tertiary j- jANS✓✓-detects jchanges jas ja jresult jof jexercise- jpiezo jaccelerometer
The jsmaller jthe jcathode jsurface jthe- j- jANS✓✓-higher jthe jcurrent jdensity,
jlower jthe jthreshold, jand jhigher jthe jimpedance j(2-6mm jas jsmall jas j1.2)
Anode jshould jbe jhow jmuch jbigger jthan jthe jcathode? j- jANS✓✓-3xs j(4-20mm
jin jpacing jleads)
ICD jtip jelectrodes jtend jto jrun- j- jANS✓✓-2-10mm
Rv jcoil jsize? j- jANS✓✓-300-600mm
SVC jcoil jsize? j- jANS✓✓-400-860mm
OHMS jLAW j- jANS✓✓-V=I j* jR
ENERGY jEQUATION j(uJ) j- jANS✓✓-V j* jI* jPW
I jis jwhat? j- jANS✓✓-Current- jflow jof jelectrons jthrough ja jcircuit
What jcan jcause jincrease jin jthreshold, jwide jQRS, jlatency, jand jundersensing? j-
jANS✓✓-Hyperkalemia- jhigh jlevels jof jpotassium
, Hypercalcemia jcan jresult jin? j- jANS✓✓-Short jQT
Hypocalcemia jcan jresult jin? j- jANS✓✓-Long jQT
Normal jPotassium jlevel? j- jANS✓✓-3.7-5.2
estimated jbattery jlife? jTime= j- jANS✓✓-Time= jQ j(battery jcapacity jin jAh) j/ jI j(
jcurrent jdrain jin jamperes)
Which jof jthe jfollowing jis jnecessary jto jinitiate jreentry jtachy? j- jANS✓✓-
unidirectional jblock jof jone jpathway j(travels jdown jthe jslow jup jthe jfast) jcan jbe
jlarge j(WPW) jor jsmall j(AVNRT)
Slew jRate j- jANS✓✓-max jrate jof jchange jbetween jthe jsensing jelectrode jand
jfirst jderivative jon jECG j
change jin jV/ jChange jin jTIme
Frequency j- jANS✓✓-# jof jtimes ja jsignal jfluctuates jin j1 jsec jexpressed jin jhertz
The jBasic jUnit jof jCapacitance jis? j- jANS✓✓-Farad
Basic jUnit jof jEnergy? j- jANS✓✓-Joule
Unit jof jcharge? j- jANS✓✓-Coulomb= j1 jamp jper jsecond
Microvolt jT jwave jtesting j- jANS✓✓-measures jbeat jto jbeat jvariations jin jthe jT
jwave, jperformed jwith jexercise jideally jhr jbetween j105 jand j110
Heart jRate jturbulence j- jANS✓✓-looks jat j10 jto j20 jbeats jfollowing ja jPVC.
jabsence jof jit jis jthe jbest jnon jinvasive jprediction jof jcardiac jmortality jfollowing
ja jMI
Fluoroquinolone jantibiotic jis jknown jfor jwhat jcardiac jeffect? j- jANS✓✓-
prolonging jthe jQT
Zener jDiode j- jANS✓✓-protects jthe jpacemaker jcircuitry jfrom jhigh jexternal
jvoltages
rheobase j- jANS✓✓-lowest jpossible jvoltage jthat jwill jstimulate jthe jmyocardium
jat jany jpulse jduration
chronaxie j- jANS✓✓-twice jthe jrheobase jvoltage
