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