HOAG ECG EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026
110-250 - Answers vtach rate
0.36-0.44 - Answers normal QT interval
500 - Answers QT high limit
QT interval - Answers represents the total duration of depolarization and depolarization of phases
HR - Answers the higher the (), the shorter the QT interval
Haldol, tikosyn, amiodarone - Answers three meds that increase QTI
atrial pacing - Answers spike appears just before p
ventricular pacing - Answers spike appears just before qrs
atrial and ventricular pacing - Answers spike appears before and after p
dual chamber pacing - Answers atrial and ventricular pacing is aka what
1st letter - Answers indicated which chamber will be paced
2nd letter - Answers indicates which chamber is sensed by the pacemaking
3rd letter - Answers pacemakers response to sensing the patients natural heart activity
AOO - Answers pacemaker mode paces in the atria 100% of the time. No sensing capability. (post-op
cardiac surgery or valvular surgery in presence of AV block)
AAI - Answers pacemaker mode paces the atria, sensing natural atrial activity, and inhibits pacing if
natural activity occurs. (Sinus node dysfunction with good AV function, SB, sinus arrest, SA block, afib)
VVI - Answers pacemaker mode paces ventricles, senses natural ventricular activity, and inhibitors
pacing if natural ventricular activity occurs. (Chronic afib, iatrogenic heart block with atrial
tacharrythmia, atrial paralysis, rare bradys)
DDI - Answers pacemaker mode paces both atria and ventricles, senses both, and inhibitors pacing
when not needed. (brady interrupted by PSVT, sick sinus syndrome with intact AV conduct)
DDD - Answers pacemaker can pace both A/V, sense both, and can trigger pacing when needed or
inhibited. (AV node disease, sinus node dysfunction, atrial arrhythmia)
50 - Answers for idioventricular escape rhythm the HR< (), no p waves, prolonged QRS interval
(ventricular/wide)
20 - Answers for idioventricular agonal rhythm the HR is < ()
left - Answers lay patient on () side is preferred for transverse pacing wire
hypotension, brady, fatigue - Answers symptoms of failure to capture
metabolic imbalance, physiologic issue changes, drug effects - Answers causes of failure to capture
oversensing - Answers results in underpacing. Pacemaker too sensitive to other signals and
inappropriately considers it to be the desired native wave it is looking for and does not pace. slower
rate. failure to pace.
undersensing - Answers results in overpacing. pacemaker not sensitive enough by not sensing patient
onw rhythm and continues to pace when not needed.
palpitations, skipped beats, may cause vtach - Answers symptoms of undersensing
110-250 - Answers vtach rate
0.36-0.44 - Answers normal QT interval
500 - Answers QT high limit
QT interval - Answers represents the total duration of depolarization and depolarization of phases
HR - Answers the higher the (), the shorter the QT interval
Haldol, tikosyn, amiodarone - Answers three meds that increase QTI
atrial pacing - Answers spike appears just before p
ventricular pacing - Answers spike appears just before qrs
atrial and ventricular pacing - Answers spike appears before and after p
dual chamber pacing - Answers atrial and ventricular pacing is aka what
1st letter - Answers indicated which chamber will be paced
2nd letter - Answers indicates which chamber is sensed by the pacemaking
3rd letter - Answers pacemakers response to sensing the patients natural heart activity
AOO - Answers pacemaker mode paces in the atria 100% of the time. No sensing capability. (post-op
cardiac surgery or valvular surgery in presence of AV block)
AAI - Answers pacemaker mode paces the atria, sensing natural atrial activity, and inhibits pacing if
natural activity occurs. (Sinus node dysfunction with good AV function, SB, sinus arrest, SA block, afib)
VVI - Answers pacemaker mode paces ventricles, senses natural ventricular activity, and inhibitors
pacing if natural ventricular activity occurs. (Chronic afib, iatrogenic heart block with atrial
tacharrythmia, atrial paralysis, rare bradys)
DDI - Answers pacemaker mode paces both atria and ventricles, senses both, and inhibitors pacing
when not needed. (brady interrupted by PSVT, sick sinus syndrome with intact AV conduct)
DDD - Answers pacemaker can pace both A/V, sense both, and can trigger pacing when needed or
inhibited. (AV node disease, sinus node dysfunction, atrial arrhythmia)
50 - Answers for idioventricular escape rhythm the HR< (), no p waves, prolonged QRS interval
(ventricular/wide)
20 - Answers for idioventricular agonal rhythm the HR is < ()
left - Answers lay patient on () side is preferred for transverse pacing wire
hypotension, brady, fatigue - Answers symptoms of failure to capture
metabolic imbalance, physiologic issue changes, drug effects - Answers causes of failure to capture
oversensing - Answers results in underpacing. Pacemaker too sensitive to other signals and
inappropriately considers it to be the desired native wave it is looking for and does not pace. slower
rate. failure to pace.
undersensing - Answers results in overpacing. pacemaker not sensitive enough by not sensing patient
onw rhythm and continues to pace when not needed.
palpitations, skipped beats, may cause vtach - Answers symptoms of undersensing
