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In acute coronary syndrome (ACS), potassium levels &lt;3.5 mEq/L are associated with ventricular arrhythmias. Current guidelines therefore recommend a potassium target &gt;4.0 mEq/L in ACS. Our study evaluated the association between potassium levels, cardiac arrhythmias, and cardiovascular death in patients with non-ST-segment elevation myocardial infarction or unstable angina.

european heart journal. acute cardiovascular care

Serum potassium levels, cardiac arrhythmias, and mortality following non-ST-elevation myocardial infarction or unstable angina: insights from MERLIN-TIMI 36