he nurse is preparing to administer digoxin (Lanoxin) to a client experiencing atrial fibrillation. Which of the following electrolyte imbalances would the nurse assess to reduce the incidence of toxicity with digoxin (Lanoxin)?
hypokalemia
hyperkalemia
hypocalcemia
hypernatremia
The Correct Answer is A
A) Hypokalemia: Hypokalemia, or low potassium levels, significantly increases the risk of digoxin toxicity. Since digoxin competes with potassium for binding at the sodium-potassium ATPase site in the heart, low potassium levels can lead to increased digoxin effects and toxicity. Therefore, it is crucial to monitor potassium levels and correct any deficiencies before administering digoxin.
B) Hyperkalemia: While hyperkalemia is a serious concern and can also affect digoxin therapy, it usually results in decreased effectiveness of digoxin rather than increasing toxicity. Elevated potassium levels can diminish the drug's positive inotropic effect.
C) Hypocalcemia: Although calcium levels can influence cardiac function, hypocalcemia is not directly related to digoxin toxicity. Monitoring calcium is important for overall cardiac health, but it is not the primary focus when assessing the risk for digoxin toxicity.
D) Hypernatremia: Elevated sodium levels do not have a direct impact on the efficacy or toxicity of digoxin. While sodium levels are essential to monitor for overall health, they are not critical in the context of digoxin administration and toxicity risk.
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Correct Answer is D
Explanation
A) Atenolol: This is a beta-blocker that can be used for various cardiac conditions, including hypertension and certain arrhythmias, but it is not typically the first-line treatment for acute life-threatening ventricular dysrhythmias in the emergency setting.
B) Lisinopril: This medication is an ACE inhibitor primarily used to manage hypertension and heart failure. It does not address acute ventricular dysrhythmias and would not be appropriate for immediate use in this scenario.
C) Adenosine: While adenosine is effective for certain types of supraventricular tachycardia, it is not indicated for life-threatening ventricular dysrhythmias. It has a very short duration of action and is not the drug of choice in this context.
D) Procainamide: This antiarrhythmic medication is specifically used to treat life-threatening ventricular dysrhythmias. It works by stabilizing the cardiac membrane and is indicated in emergency situations to manage these types of arrhythmias. Therefore, preparing procainamide is the most appropriate action for the nurse in this scenario.
Correct Answer is C
Explanation
A) Migraine headache: While migraines can be uncomfortable and distressing, they are not a known serious side effect of atorvastatin. Clients may experience headaches, but this symptom does not typically require immediate reporting unless accompanied by other concerning signs.
B) Bradycardia: Bradycardia, or a slow heart rate, is not a common side effect of atorvastatin. While monitoring heart rate is important, bradycardia alone does not necessitate immediate reporting unless it leads to significant symptoms or complications.
C) Dark-red urine: Dark-red urine is a concerning finding that could indicate serious conditions, such as hematuria or rhabdomyolysis, particularly when associated with statin use. This symptom requires immediate reporting to the healthcare provider, as it may signify potential muscle breakdown or kidney issues, which are serious complications of atorvastatin therapy.
D) Elevated HDL cholesterol: Increased levels of HDL (high-density lipoprotein) cholesterol are generally considered beneficial and a positive outcome of treatment. Therefore, this finding would not necessitate immediate reporting to the healthcare provider.