IBHRE Study Guide: Medications
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Flecanide - CORRECT ANSWER - Used for AF. Can stop PVCs. Negative inotropic
effect. Increases DFT. Class Ic.
Adenosine - CORRECT ANSWER - Will not result in torsades and may be used to test if
you have AVNRT, as it slows AV conduction and should halt the SVT
Won't alter VT
Amiodarone - CORRECT ANSWER - Class III
does not have negative inotropic effects so it may be used safely with CHF patients, making it
the drug of choice for CHF individuals who need it to treat AF, VTs, or SVT
Toxicity due to this may cause Poly VT. Increases Beta Blocker effect (so may cause Brady)
May affect metabolism of Warfarin or Digoxin, so ease off those therapies of used with this drug.
Has properties of all other drug classes, making it the true Voltron (or Megazord or Captain
Planet) of drug therapies
Lidocaine - CORRECT ANSWER - Drugs that may increase DFT thresholds but decrease
action potential duration and refractory periods
Will not cause Torsades
, Sotalol - CORRECT ANSWER - This drug is known to increase chronic pacing
thresholds and decrease chronic defibrillation thresholds
Class III - CORRECT ANSWER -
Class Ia - CORRECT ANSWER -
Class Ib - CORRECT ANSWER -
Class Ic - CORRECT ANSWER -
Class II (Beta blockers) - CORRECT ANSWER -
Class IV (Calcium Channel Blockers) - CORRECT ANSWER -
Class Ia - CORRECT ANSWER - ○ Na+ Channel - Moderately prolongs refractoriness
and decreases conduction velocity (increases QRS and prolongs QT interval)
○ Examples: Procainamide, Disopyriamide (Norpace), Quinidine
○ CONSIDERATIONS:
• Can use for atrial and ventricular arrhythmias • Torsade de pointes - monitor QRS width and
prolongation of QT • May slow VT rates- ATP therapy and detection rates • Can enhance AV
conduction- may need to use with rate slowing drugs
Class Ib - CORRECT ANSWER - ○ Na+ ion channel - Mildly Decreases action potential
duration and shorten refractory period
○ Examples: Lidocaine, Mexilitine, Tocainide, Phenytoin (Dilantin)
○ CONSIDERATIONS:
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Flecanide - CORRECT ANSWER - Used for AF. Can stop PVCs. Negative inotropic
effect. Increases DFT. Class Ic.
Adenosine - CORRECT ANSWER - Will not result in torsades and may be used to test if
you have AVNRT, as it slows AV conduction and should halt the SVT
Won't alter VT
Amiodarone - CORRECT ANSWER - Class III
does not have negative inotropic effects so it may be used safely with CHF patients, making it
the drug of choice for CHF individuals who need it to treat AF, VTs, or SVT
Toxicity due to this may cause Poly VT. Increases Beta Blocker effect (so may cause Brady)
May affect metabolism of Warfarin or Digoxin, so ease off those therapies of used with this drug.
Has properties of all other drug classes, making it the true Voltron (or Megazord or Captain
Planet) of drug therapies
Lidocaine - CORRECT ANSWER - Drugs that may increase DFT thresholds but decrease
action potential duration and refractory periods
Will not cause Torsades
, Sotalol - CORRECT ANSWER - This drug is known to increase chronic pacing
thresholds and decrease chronic defibrillation thresholds
Class III - CORRECT ANSWER -
Class Ia - CORRECT ANSWER -
Class Ib - CORRECT ANSWER -
Class Ic - CORRECT ANSWER -
Class II (Beta blockers) - CORRECT ANSWER -
Class IV (Calcium Channel Blockers) - CORRECT ANSWER -
Class Ia - CORRECT ANSWER - ○ Na+ Channel - Moderately prolongs refractoriness
and decreases conduction velocity (increases QRS and prolongs QT interval)
○ Examples: Procainamide, Disopyriamide (Norpace), Quinidine
○ CONSIDERATIONS:
• Can use for atrial and ventricular arrhythmias • Torsade de pointes - monitor QRS width and
prolongation of QT • May slow VT rates- ATP therapy and detection rates • Can enhance AV
conduction- may need to use with rate slowing drugs
Class Ib - CORRECT ANSWER - ○ Na+ ion channel - Mildly Decreases action potential
duration and shorten refractory period
○ Examples: Lidocaine, Mexilitine, Tocainide, Phenytoin (Dilantin)
○ CONSIDERATIONS:
