Medications Flashcards
class 1
blocks Na channels
what do class 1 blocks Ns channels do
prolongs absolute refractory peroid and decreases risk of premature impulses, decreases automaticity
class 2
beta blocks
what do class 2 blocks beta blockers
inhibits dysrythmias mediated by SNS
competes with endogenous catecholamines for receptor sites
class 3 name and action
prolongs repoloarization and action potential
Class IV
blocks calcium channels
how do class IV calcium channels work
atria, sinus, and AV node
depress sinus AV condition and terminates TACHYS
proarrythmic drugs
*all of the ones I’m unfamiliar with
- quindine
procaniamide
dofetilide
ibutilide
example of class 1
lidocaine
example of class 2
metaprolol
example of class 3
amiodarone
example of class 4
diltiazem
torsades cause
long QT
1A and III
electrolytes
subarachnoid hemorrhage
adenosine
* action
slows condition through the AV node causing transient AV block
half life of adenosine
short
how treat torsades
magnesium
chrono affects
rate
ino affects
contractility
epi chromo and ino
increase both
dig chromo and ino
increase ino
decrease chrono
dopamine chrono and ino
increase
beta blocker chromo and ino
- ino
+ chrono
dig range
very narrow
what electrolyte to monitor for dig
K
(hypokalemia)
vision sign for dig toxicity
hallo vision
dopamine low dose
under 5mcg
- dilate renal and mesentery arteries
dopamine high dose
over 5mcg
- vasoconstriction, positive isotrope, positive chrono trope
dobutamine used for
improve contractility in heart failure and cariogenic shock
epi is give in what rythms
pulseless
- Vtach
- vfib
- PEA
- asytole
norepineprhrine should be infused how
central line
- extravasation
phosphodiesterase inhibiors
positive inotrope and vasodilation
what is the best vasopressor
norepinephrine
sodium nitroprusside (nipride)
afterload
- vasodilator
nitroglycerine
reduces cardiac filling pressures
relieves pulmonary congestion
decreased cardiac workload and oxygen consumption
atropine works how
temporaliy increase heart rate or decrease AV block until definitive intervention can take place
what is atropine an antidote for
overdose of cholinergic
(doxepine)
DHP CCB
amlodapine
NDHP CCB
verapamil and diltiazem
angiotensin 2 does what
vasoconstrict
what are ACEI good for
hypertension
diabetic nephropathy
CHF
side effects of ACEI
cough
angioedema
hyperkalemia
ARB ending
sartan
a adrenergic blockers
labetalol
phentolamine
dopamine