Shock Duration after Resuscitation Is Associated with Occurrence of Post-Cardiac Arrest Acute Kidney Injury

This retrospective observational study investigated the clinical course and predisposing factors of acute kidney injury (AKI) developed after cardiac arrest and resuscitation. Eightytwo patients aged over 18 yr who survived more than 24 hr after cardiac arrest were divided into AKI and non-AKI groups according to the diagnostic criteria of the Kidney Disease/ Improving Global Outcomes (KDIGO) Clinical Practice Guidelines for AKI. Among 82 patients resuscitated from cardiac arrest, AKI was developed in 66 (80.5%) patients (AKI group) leaving 16 (19.5%) patients in the non-AKI group. Nineteen (28.8%) patients of the AKI group had stage 3 AKI and 7 (10.6%) patients received renal replacement therapy during admission. The duration of shock developed within 24 hr after resuscitation was shorter in the non-AKI group than in the AKI group (OR 1.02, 95% CI 1.01-1.04, P < 0.05). On Multiple logistic regression analysis, the only predisposing factor of postcardiac arrest AKI was the duration of shock. In conclusion, occurrence and severity of post-cardiac arrest AKI is associated with the duration of shock after resuscitation. Renal replacement therapy is required for patients with severe degree (stage 3) post-cardiac arrest AKI.