Correcting Hypokalemia in Hospitalized Patients Does Not Decrease Risk of Cardiac Arrhythmias.

Area of Science:

• Cardiology
• Internal Medicine
• Clinical Practice

Background:

• Standard practice involves correcting hypokalemia to prevent cardiac arrhythmias in hospitalized patients.
• The clinical efficacy of this intervention has not been previously evaluated.

Purpose of the Study:

• To assess the risk of cardiac arrhythmias in patients with hypokalemia whose potassium levels were not corrected to ≥3.5 mEq/L.
• To evaluate this risk specifically in patients without acute coronary syndrome or a history of arrhythmias.

Main Methods:

• Retrospective case-control study conducted at a community hospital.
• Inclusion of patients with hypokalemia monitored via telemetry.
• Grouping patients based on serum potassium correction to ≥3.5 mEq/L within 24 hours.

Main Results:

• A total of 1338 hypokalemic patient-days were analyzed, with 22 arrhythmia events (1.6%).
• No statistically significant relationship was found between potassium correction and the incidence of arrhythmias (p=0.037, OR=2.38).
• Logistic regression indicated correction of potassium is not significantly related to arrhythmias (p=0.0517).

Conclusions:

• In acute care settings, uncorrected hypokalemia (not reaching ≥3.5 mEq/L) was not associated with an increased risk of arrhythmias.
• The routine practice of checking and replacing potassium may be inconsequential for arrhythmia prevention in many patients.