Cardio pharm

Question 1

what antiarrhythmic

inc AP duration

inc (ERP) effective refractory period

inc QT interval (blcoking some K channels)

Answer 1

Class IA

Quinidine

Procainamide

Disopyramide

“Double Quarter Pounder

Question 2

which Class 1 drugs

dec/shorten AP duration

perferentailly affect ischemic and purkinje tissue

Answer 2

Class 1B

Lidocaine,

Mexiletine

Tocainide

Question 3

indications for class IB antiarrhythmics?

Lidocaine, Mexiletine

Answer 3

post MI!!!!!!!!!!!!!!!

Digi induced arrhythmias

Question 4

what antiarrythmic class

Prolongs ERP in AV nodes and bypass tract

no effect on ERP in urkinje or Ventricles.

what are they used for?

Answer 4

class 1C

Flecainide, Propafenone.

these are hardly used anymore bc SE

indications: SVTs, including (A-fib) ,

last resort regractory VT

Question 5

when are Class 1C CI?

Answer 5

Post -MI

Question 6

what class of drugs

Inc APD

inc ERP

inc QT interval

Answer 6

Class III​

“AIDS”

Amiodarone

Ibutilide

Dofetilide

Sotalol

Question 7

what antiarrhythmic causes

dec conduction velocity

INC ERP

INC PR interval (period in which inpulse is delayed through AV node)

Answer 7

Class IV ca channel blockers

the prolong phase 4 depolarization

dec slope of phase 0 in pace maker cells