Heart 2 (tachycardia) Flashcards
(5 cards)
1
Q
what are Class 1 anti-arrhythmic drugs?
A
sodium channel blockers for cardiomyocytes prolonging action potential and lowering HR
as more channels open with activity more channels become blocked
2
Q
what are the sub classes of Class 1 anti-arrhythmic drugs?
A
1a intermediate dissociation
1b fast dissociation
1c fast dissociation
3
Q
what are Class 2 anti-arrhythmic drugs?
A
beta blockers
4
Q
what are Class 3 anti-arrhythmic drugs?
A
inhibit K+ channels in cardiomyocytes prolong next action potential causing slow repolarisation and reducing heart rate
5
Q
what are Class 4 anti-arrhythmic drugs?
A
Ca2+ blockers
