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34 Cards in this Set

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Drugs that influence th rate of the heartbeat
chronotropic drugs
drugs that influence the conduction of electrical impulses.
dromotropic drugs
the proportion of blood that is ejected during each ventricular contraction compared with the total ventricular filling volume.
Ejection fraction
An abnormal condition in which cardiac pumping is impaired as a result of myocardial infarction,ischemic heart disease, or cardiomyopathy
heart failure
drugs that influence the force or energy of muscular contractions.
inotropic drugs
a common cardiac dysrhythmia involving atrial contractions that are so rapid that they prevent full repolarization of myocardial fibers between heartbeats.
Atrial fibrillation
increase in the heart rate
positive chronotropic
enhance the conduction of electrical impulses in the heart
positive dromotropic
the toltal amount of blood in the ventricle immediately before it contracts, or the preload
left ventricular end-diastolic volume
this is the period during which the cardiac cell is readjusting its sodium and potassium levels and cannot be depolarized again
refractory period
65% of the total volume in the ventricle is:
ejection fraction
reduced heart rate
negative chronotropic
digoxin decreases automaticity at the SA node causing a:
negative dromotropic effect
if the apical pulse is less than 60 digoxin should be:
given
Promotion of ____ improves blood circulation
diuresis
digoxin _____ stroke volume
increases
used in the treatment of heart failure and supraventricular dysrhythmias
cardiac glycosides
diuresis through the kidney relieves:
SOB
pulmonary edema
most pronounced adverse effect of digoxin is:
green yellow visual halos
obstruction in the left ventricle below the aortic valve
subaortic stenosis
what needs to be monitored during digoxin therapy:
dig level
potassium level
apicial pulse
a potassium level that is 6.0 indicates:
digitoxicity
treatment of digitoxicity
discontinue digoxin administration
monitor v/s and labs
administer digoxin immune Fab
the antidote for digoxin is
digoxin immune Fab
loop diuretics and laxatives concurrently given with digoxin can:
increase digoxin
produce hypokalemia
low potassium in blood
hypokalemia
food contraindicated with digoxin is
bran
food that decreases the absorption of digoxin
bran
a loading dose of digoxin is
1 to 1.5
loading dose of digoxin is called
digitalizing
hypokalemia indicates
digoxin toxicity
digoxin level should be between:
0.5 to 2.0
Low potassium level indicates
digoxin toxicity
Potassium level should be between:
3.5 to 5.0