IBHRE EXAM,PRACTICE EXAM AND STUDYGUIDE 2025 WITH
ACTUAL QUESTIONS AND CORRECT VERIFIED ANSWERS
ALREADY GRADED A+ 100% GUARANTEED PASS!
ICD Battery Types- CORRECT ANSWER-1. Li/SVO: Lithium/Silver-Vanadium
Oxide (1st gen.)
2. Lithium/Manganese Dioxide (2 manufacturers)
3. Lithium/Silver-Vanadium Oxide-Carbon Monofluoride (2 manufacturers -
MDT)
Capacitor Types- CORRECT ANSWER--Aluminum Electrolytic
-Tantalum
5 Phases of Cardiac Action Potential- CORRECT ANSWER-*Phase 0: influx of
Na+ (depolarization - conduction velocity)
*Phase 1: transient efflux of K+ (how quickly the cell can be depolarized again)
*Phase 2: influx of Ca 2+ & Na+ (")
*Phase 3: efflux of K+ > influx of Ca2+ & Na+ (")
*Phase 4: Na+ -K+ pump (resting phase, ion leakage determines when next
spontaneous depolarization will happen)
Excitable Periods of Cardiac Action Potential- CORRECT ANSWER-Phase 0,
Phase 1, Phase 2
, Refractory Periods of Cardiac Action Potential- CORRECT ANSWER-Phase 3 &
Phase 4
Drugs That Increase DFTs- CORRECT ANSWER-Lidocaine, Mexiletine,
Flecainide, Quinidine, Disopyramide, Moricizine, Propranolol, Verapamil,
Amiodarone, Sildenafil Citrate
Drugs That Decrease DFTs- CORRECT ANSWER-Sotalol, Dofetilide, Ibutilide
Drugs With Conflicting Data on DFTs- CORRECT ANSWER-Procainamide,
Propafenone, Bretylium
Drugs That Increase Pacing Thresholds- CORRECT ANSWER-Flecainide,
Propafenone, Encainide, Sotalol, Beta Blockers, Lidocaine, Verapamil,
Procainamide
Drugs That Decrease Thresholds- CORRECT ANSWER-Atropine,
Catecholamines, Glucocoticoids
Drugs That Have No Proven Effect on Thresholds- CORRECT ANSWER-
Amiodarone, Anesthetic Drugs
Name of Class 1 Antiarrhythmic Drugs- CORRECT ANSWER-* 1a:
disopyramide, procainamide, quinidine
*1b: lidocaine, mexiletine
*1c: flecainide, propafenone
Class 1 Antiarrhythmic Drugs- CORRECT ANSWER-Sodium Channel Blockers
ACTUAL QUESTIONS AND CORRECT VERIFIED ANSWERS
ALREADY GRADED A+ 100% GUARANTEED PASS!
ICD Battery Types- CORRECT ANSWER-1. Li/SVO: Lithium/Silver-Vanadium
Oxide (1st gen.)
2. Lithium/Manganese Dioxide (2 manufacturers)
3. Lithium/Silver-Vanadium Oxide-Carbon Monofluoride (2 manufacturers -
MDT)
Capacitor Types- CORRECT ANSWER--Aluminum Electrolytic
-Tantalum
5 Phases of Cardiac Action Potential- CORRECT ANSWER-*Phase 0: influx of
Na+ (depolarization - conduction velocity)
*Phase 1: transient efflux of K+ (how quickly the cell can be depolarized again)
*Phase 2: influx of Ca 2+ & Na+ (")
*Phase 3: efflux of K+ > influx of Ca2+ & Na+ (")
*Phase 4: Na+ -K+ pump (resting phase, ion leakage determines when next
spontaneous depolarization will happen)
Excitable Periods of Cardiac Action Potential- CORRECT ANSWER-Phase 0,
Phase 1, Phase 2
, Refractory Periods of Cardiac Action Potential- CORRECT ANSWER-Phase 3 &
Phase 4
Drugs That Increase DFTs- CORRECT ANSWER-Lidocaine, Mexiletine,
Flecainide, Quinidine, Disopyramide, Moricizine, Propranolol, Verapamil,
Amiodarone, Sildenafil Citrate
Drugs That Decrease DFTs- CORRECT ANSWER-Sotalol, Dofetilide, Ibutilide
Drugs With Conflicting Data on DFTs- CORRECT ANSWER-Procainamide,
Propafenone, Bretylium
Drugs That Increase Pacing Thresholds- CORRECT ANSWER-Flecainide,
Propafenone, Encainide, Sotalol, Beta Blockers, Lidocaine, Verapamil,
Procainamide
Drugs That Decrease Thresholds- CORRECT ANSWER-Atropine,
Catecholamines, Glucocoticoids
Drugs That Have No Proven Effect on Thresholds- CORRECT ANSWER-
Amiodarone, Anesthetic Drugs
Name of Class 1 Antiarrhythmic Drugs- CORRECT ANSWER-* 1a:
disopyramide, procainamide, quinidine
*1b: lidocaine, mexiletine
*1c: flecainide, propafenone
Class 1 Antiarrhythmic Drugs- CORRECT ANSWER-Sodium Channel Blockers
