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74 Cards in this Set

  • Front
  • Back
what is the pathway of normal heart impulse
SA node (pacemaker) to atrium to AV node to ventricles
what are 2 different ways to get an arrhythmia
altered pacemaker
altered pathway
describe the typical action potential of heart muscle
resting potential of -90mv
Na+ influx
Ca++ influx (causes muscle contraction)
K+ efflux
what is the best treatment for arrhythmias
no treatment at all (if patient is otherwise healthy)
what are the 4 non-drug treatments for arrhythmias
pacemakers
cardioversion (electric shock)
implantation of automatic defibrillators
surgical removal of ectopic foci
describe the different classes of drugs for treating arrhythmias
class 1: local anesthetics that decrease Na+ influx; greater effect on ectopic foci
1A: lengthen AP and slow depolarization
1B: lidocaine
class 2: inhibit effect of epi on heart (slow HR); DOC for atrial fib
class 3: K+ channel blockers (for atrial fib)
class 4: Ca++ channel blockers (for supraventricular atrial fib; used for all except ventricular arrhythmias)
what are the class 1A anti-arrhythmia drugs
"PDQ" like "pretty damn quick"
procanamide
disopramide
quinidine
class 1B anti-arrhythmias
lidocaine
class 2 anti-arrhythmias
propanolol
metaprolol
class 3 anti-arrhythmias
sotalol
amiodarone
class 4 anti-arrhythmias
verapamil
dilteazan
nifedipine
adenosine
how do the class 1A anti-arr work
lengthen AP and slow depolarization
they decrease sodium influx
what is quinidine used for
all arrhytmias (atrial and ventricular)
side effects of quinidine
cns effects
tinnitus
altered color vision
what is procanamide used for
all tachycardias
what is the difference between procaine and procanamide
procanamide is an analog of procaine
procanamide lasts longer and does NOT enter the CNS
has lupus like side effects in slow acetylators
what is the drug of choice for ventricular tachycardia
lidocaine
what type of arrythmias is disopyramide used for
ventricular
which anti-arrhytmia drug is like atropine
disopyramide
how is lidocaine given
IV b/c of first pass effect
it is class 1B anti-arrhythmia drug
what is a general way to remember class 2 anti-arrhyth drugs
they are beta blockers
propanolol blocks beta 1 and beta 2
metaprolol blocks just beta 1
which anti-arrhytmia drug acts like all 4 classes of the drugs and thus has many side effects
amiodarone (class 3)...classified as a K+ channel blocker though
what are the many side effects of amiodarone
it is a class 3 anti-arrhythmia drug
blocks K+ channels
corneal deposits
optic nerve damage (optic neuritis)
pulmonary fibrosis
skin deposits (b/c it contains iodine and leaves blue/gray color)
altered thyroid gland fxn b/c it contains iodine
which anti-arrythmia drug contains iodine
amiodarone
corneal deposits
skin deposits
altered thyroid gland
which 3 anti-arrhythmia drugs cause vasodilation
verapamil
dilteazan
nifedipine

all are class 4 (calcium channel blockers)
which anti-arrhythmia drug is given IV and decreases firing rate of the AV node
adenosine
what does adenosine do
decreases firing rate of AV node
given IV
what clotting factors require Vitamin K
7,9,10, prothrombin, protein C

so all these are inhibited by coumadin
what does activated protein C do
degrades Va and VIIa and degrades clots
what does factor Xa do
catalyzes the reaction of prothrombin to thrombin
how do you pronounce luncheon
ask jonas.... its french
difference between white thrombi and red thrombi ?
arterial (white)
venous (red) origin
what is a thrombus
a clot that adheres to a vessel wall
what type of thrombi would most likely have fibrin and platelets, and is associated with atherosclerotic plaque
white thrombi
embolus
a piece of a thrombus that breaks off and can potentially plug a downstream vessel
where is heparin stored
mast cells
what enzyme does heparin activate
lipoprotein lipase
2 ways heparin works
either directly inhibiting thrombin
or
inhibiting Xa, which is needed to facilitate prothrombin --> thrombin
what do you treat a heparin overdose with
protamine sulfate
how does synthetic heparin (fondaparinux) work
ONLY on Xa
fodaparinux
synthetic heparin

only acts on Xa
decreases number of platelets
anagrelide
ADP receptor blockers anticoagulants
"clopid"/"grel"

ticlopidine
clopidogrel
prasugrel
mechanism of action of aspirin for anticoagulats
inhibits ENZYME (COX) which decreases amout of TXA2
fibrinogen receptor blockers (GP IIB/IIIA blockers) for anticoag.
abciximab
tirofiban
eptifibatide
phosphodiesterase inhibitors for anticoag. and mech of action
cilostazol
dipyridamole

inhibit ENZYME (PDE) which causes increased cAMP which inhibits platelet aggregation
which things dissolve fibrin clots
streptokinase/urokinase
TPA
drotrecogin alfa (activated protein C)
what are the hemostatic agents (cause platelet aggregation and possibly clotting)
"A.T.E. A."...."i ATE A clot"

aminocaproic acid
tranexamic acid
estrogen
astringents
which drugs are calcium chelators (inhibit calcium)
EDTA
citric acid
compare heparin, low molec. wt. heparins, and fondaparinux
heparin: inhibits thrombin and Xa by activating AT3 (also activates lipoprotein lipase)
low mol. wt. hep's (parins): inhibit Xa (also thromin a little)
fondaparinux: inhibits ONLY Xa
mechanism of action of heparin
activates AT3 which will inhibit thrombin and Xa
activates lipoprotein lipase which will break down FA's in blood
what do you take if you overdose on heparin
protamine sulfate
what are the leech drugs and how do they work
leeches are "rude" and say "arg"
"irudin"s
argatroban (used to treat HIT)
inhibit thrombin
which drugs can inhibit thrombin
heparin
low mol.wt. heparins (parins)
leech drugs (irudins and argatroban)
which drug is activated protein c
drotrecogin alfa
mechanism of action of drotrecogin alfa
(it is activated protein C) so protein C degrades Va and VIIIa and dissolves clots
coumadin is an analog of what
vitamin K (so it inhibits the action of real vitamin K which inhibits 7,9,10, PT)
mechanism of action of coumadin
it is an analog of vitamin K so it inhibits the action of real vitamin K which inhibits 7,9,10, PT
side effects of heparin
bleeding
osteoporosis with long term use
thrombocytopenia (HIT)
heparin is a ______ drug
natural drug...extracted from dead cow/pig
which drug is used to treat heparin induced thrombocytopenia (HIT)
argatroban (leech drug that inhibits thrombin)
which drug is used to treat disseminated intravascular coagulation (DIC)
drotrecogin alfa
which anticoagulant is pregnancy category X
coumadin
what do you do if you overdose on coumadin
take vitamin K
in what type of people will coumadin not work so well
vegans or people who eat a lot of food with vitamin K in it
side effects of ticlopidine, clopidogrel, and prasugrel
(the ADP receptor blockers)
decrease WBC's: neutropenia, agranulocytosis, thrombocytopenia
side effects of fibrinogen receptor blockers
thrombocytopenia
decrease platelet aggregation
white thrombi (arterial)
which drug is a monoclonal antibody
abciximab

any drug that has "mab" is a monoclonal antibody
Who's the world's greatest athlete?
The guy who finishes first and third in a masturbation contest.
What is the difference between a woman and a washing machine?
You can put your load in a washing machine and it won't call you a week later.
What is the cheapest meat?
Deer balls, they're under a buck.
What is the difference between a clever midget and a venereal disease?
One is a cunning runt, and the other is a running cunt
What do you do when your dishwasher stops working?
Yell at her.
What's the difference between a priest and pimples?
Pimples don't come on your face until you're 13.