step 2CK: digoxin hyperkalemia

This is a question i found on MTB step 2 ck, it said: You have a patient with dilated cardiomyopathy secondary to MI in the past, that comes for routine evaluation, is asymptomatic, but with hyperkalemia. He is on lisinopril, furosemide, metoprolol, aspirin and digoxin. What is the best management? The answer was to change lisinopril (a IECA, so a possible cause of hyperKalemia) for hydralazine + nitroglycerin. This also lowers mortality, like IECAs, in CHF. My question is... I remember... step 2CK: digoxin hyperkalemia
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