The antagonistic agent to digoxin toxicity is what?
Protamine sulfate.
Acetylcysteine.
Antidigoxin.
Activated charcoal.
The Correct Answer is C
Antidigoxin is an antidote for digoxin toxicity that binds and inactivates digoxin, a cardiac glycoside that can cause life-threatening arrhythmias, hyperkalemia, and other symptoms when overdosed. Antidigoxin is also known as digoxin immune Fab or DIGIFab.
Choice A, protamine sulfate, is wrong because it is an antidote for heparin, an anticoagulant that can cause bleeding when overdosed.
Choice B, acetylcysteine, is wrong because it is an antidote for acetaminophen, a painkiller that can cause liver damage when overdosed.
Choice D, activated charcoal, is wrong because it is a nonspecific adsorbent that can reduce the absorption of some drugs or poisons from the gastrointestinal tract, but it is not effective for digoxin toxicity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Intermittent claudication is a condition in which leg pain is produced upon increased activity and ischemia to tissues, but then the pain is reduced with rest. This is because the blood flow to the leg muscles is insufficient to meet the increased demand during exercise, but adequate at rest.Intermittent claudication is a common symptom of peripheral artery disease (PAD), which is a narrowing of the arteries that supply blood to the legs.
Choice B, sporadic ischemia, is wrong because it is not a specific medical term for a condition that causes leg pain.
Ischemia means reduced blood flow to a part of the body, which can cause pain, but it can be caused by various factors and affect different organs.
Choice C, angina, is wrong because it is a term for chest pain caused by reduced blood flow to the heart, not the legs.
Angina can also be triggered by physical activity and relieved by rest, but it is not related to PAD or leg ischemia.
Choice D, restless leg syndrome, is wrong because it is a condition that causes an uncomfortable urge to move the legs, usually at night or when lying down.
Restless leg syndrome does not cause pain or ischemia in the legs, and it is not improved by rest.It is thought to be related to a problem with the nervous system or iron deficiency.
Correct Answer is B
Explanation
Class IV antidysrhythmics or calcium channel blockers decrease the flow of calcium ions into cardiac and vascular smooth muscle cells, thus decreasing heart rate and contractions.By reducing the calcium influx, they also decrease the slope of phase 0 and 4 and prolong phase 2 of the cardiac action potential.This results in vasodilation, reduced myocardial oxygen demand, and decreased conduction through the AV node.
Choice A is wrong because calcium channel blockers do not increase blood vessel spasm, but rather cause vasodilation.
Choice C is wrong because calcium channel blockers do not decrease refractory period, but rather prolong it by extending phase 2 of the cardiac action potential.
Choice D is wrong because calcium channel blockers do not increase heart rate, but rather decrease it by slowing down the pacemaker activity and AV nodal conduction.
Normal ranges for heart rate are 60 to 100 beats per minute, and for blood pressure are 120/80 mmHg or lower.
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