Pharmacology- Antidysrhythmics Exam Solution Manual Fully Solved Latest Update 2025
Sodium channel blockers names - Answers The CAINs
Lidocaine and procainamide
What do sodium channel blockers do? - Answers Slow depolarization, reduce cell excitability
Sodium is responsible for cell depolarization, sodium flows in and prepares the heart for contraction.
Why would we give a sodium channels blocker to extend this period? - Answers If cells are wayyyy too
excited and need to calm down
VTach, VFib, ATach, AFib
Why do you give sodium channel blockers - Answers V tach and V fib
Slower activity down the bundle of his
Sodium and potassium directly effect the ventricles
Calcium drives muscle contraction for atria and ventricle muscles but calcium also drives the
____________ of the AV/SA nodes - Answers Depolarization/firing
Think of the nodes as their own thing, they don't have muscles, so their "contraction" is still caused by
calcium, but it's just a firing of electrical signals
Ventricular problems cause what - Answers Low cardiac output, so low oxygen
class two antidysrhythmics - Answers Beta blockers
End in -lol
When would you give beta blockers - Answers To extend the hearts resting phase, delay action
potentials, hold the firing
A Tach and AFib, slows the AV node
Good for atrial problems
Main Potassium channel blocker, what does it lower - Answers Amiodarone
Lowers HR and BP
Why would you give a potassium channel blocker - Answers V tach and V fib
Extend the hearts resting phase (phase 3) allows the heart to fully relax before contracting again
Potassium and sodium directly effect the ventricles
Sodium channel blockers names - Answers The CAINs
Lidocaine and procainamide
What do sodium channel blockers do? - Answers Slow depolarization, reduce cell excitability
Sodium is responsible for cell depolarization, sodium flows in and prepares the heart for contraction.
Why would we give a sodium channels blocker to extend this period? - Answers If cells are wayyyy too
excited and need to calm down
VTach, VFib, ATach, AFib
Why do you give sodium channel blockers - Answers V tach and V fib
Slower activity down the bundle of his
Sodium and potassium directly effect the ventricles
Calcium drives muscle contraction for atria and ventricle muscles but calcium also drives the
____________ of the AV/SA nodes - Answers Depolarization/firing
Think of the nodes as their own thing, they don't have muscles, so their "contraction" is still caused by
calcium, but it's just a firing of electrical signals
Ventricular problems cause what - Answers Low cardiac output, so low oxygen
class two antidysrhythmics - Answers Beta blockers
End in -lol
When would you give beta blockers - Answers To extend the hearts resting phase, delay action
potentials, hold the firing
A Tach and AFib, slows the AV node
Good for atrial problems
Main Potassium channel blocker, what does it lower - Answers Amiodarone
Lowers HR and BP
Why would you give a potassium channel blocker - Answers V tach and V fib
Extend the hearts resting phase (phase 3) allows the heart to fully relax before contracting again
Potassium and sodium directly effect the ventricles
