The Outcome and Predictors of Mortality in Patients Therapeutically Cooled Postcardiac Arrest

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Purpose:To review the outcomes of patients postcardiac arrest admitted to a metropolitan intensive care unit (ICU) where therapeutic hypothermia is practiced.Materials and Methods:Patients admitted from 2004 to 2012 were reviewed. The management protocol included cooling to 33°C for 24 hours. The primary outcome assessed was hospital mortality. Secondary outcome measures included mortality in patients admitted to ICU after in-hospital cardiac arrest (IHCA) when compared to those with out-of-hospital cardiac arrest (OHCA) and to review initial cardiac rhythm as an indicator of mortality.Results:A total of 330 patients were included. The overall hospital mortality was 58.1%. Hospital mortality was significantly higher in patients who had OHCA when compared to IHCA (62.5% vs 51%; P = .04). Patients who had asystole and pulseless electrical activity (PEA) had a higher mortality when compared to ventricular tachycardia/ventricular fibrillation (VT/VF) arrest (81.7% vs 67.8% vs 41.9%, respectively; P < .01).Conclusion:Patients admitted to ICU postcardiac arrest after therapeutic cooling have a high mortality. An initial rhythm of VT/VF confers a mortality benefit when compared to asystole and PEA.

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