Which electrolyte abnormality increases the risk of Digoxin toxicity when using diuretics?

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Prepare for your NCLEX exam focusing on heart failure. Utilize questions with explanations and hints to ensure exam readiness. Empower your study sessions with effective strategies and guidance for success.

Multiple Choice

Which electrolyte abnormality increases the risk of Digoxin toxicity when using diuretics?

Explanation:
Low potassium levels raise the risk of digoxin toxicity when using diuretics. Digoxin works by inhibiting the Na+/K+-ATPase pump in heart cells. Potassium competes with digoxin for this binding site, so when potassium is low (hypokalemia), more digoxin binds to the pump. This strengthens digoxin’s effect, increasing intracellular calcium and the potential for dangerous arrhythmias and toxicity symptoms. Diuretics often cause potassium loss, creating a hypokalemic state that heightens toxicity risk. Monitor potassium and watch for signs like gastrointestinal symptoms, confusion, vision changes, or new arrhythmias.

Low potassium levels raise the risk of digoxin toxicity when using diuretics. Digoxin works by inhibiting the Na+/K+-ATPase pump in heart cells. Potassium competes with digoxin for this binding site, so when potassium is low (hypokalemia), more digoxin binds to the pump. This strengthens digoxin’s effect, increasing intracellular calcium and the potential for dangerous arrhythmias and toxicity symptoms. Diuretics often cause potassium loss, creating a hypokalemic state that heightens toxicity risk. Monitor potassium and watch for signs like gastrointestinal symptoms, confusion, vision changes, or new arrhythmias.

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