Body temperature changes are associated with outcomes following in-hospital cardiac arrest and return of spontaneous circulation.
BACKGROUND
Spontaneous changes in body temperature after return of circulation (ROSC) from cardiac arrest are common, but the association of these changes with outcomes in hospitalized patients who survive to 24h post-ROSC is not known. We tested the hypothesis that adults who experience temperature lability in the first 24h have worse outcomes compared with those who maintain normothermia.


METHODS
A prospective observational study from a multicenter registry of cardiac arrests (National Registry of Cardiopulmonary Resuscitation) from 355 US and Canadian hospitals. 14,729 adults with return of circulation from a pulseless cardiac arrest. We excluded those who died or were discharged before 24h post-event, those made Do-Not-Resuscitate (DNR) within 24h of event, those that had a preceding trauma, and those with multiple cardiac arrests. Finally, we included only subjects that had both a lowest (T(min)) and highest (T(max)) body temperature value recorded during the first 24-h after ROSC, resulting in a study sample of 3426 patients.


RESULTS
After adjustment for potential covariates, there was a lower odds of survival in those having an episode of hypothermia (adjusted odds ratio [OR], 0.62; 95% confidence interval [CI], 0.48-0.80), those having an episode of hyperthermia (OR, 0.67; 95% CI, 0.48-0.80), and those having an episode of both (OR, 0.59; 95% CI, 0.39-0.91). Among those who survived to discharge, there was also a lower odds of favorable neurologic performance in those who had an episode of hyperthermia (OR, 0.71; 95% CI, 0.51-0.98).


CONCLUSIONS
Episodes of temperature lability following in-hospital resuscitation from cardiac arrest are associated with lower odds of surviving to discharge. Hyperthermia is also associated with fewer patients leaving the hospital with favorable neurologic performance. Further studies should identify whether therapeutic control over changes in body temperature after in-hospital cardiac arrest improves outcomes.
Suffoletto
Brian
B
University of Pittsburgh, Pittsburgh, PA, United States. suffbp@upmc.edu
Peberdy
Mary Anne
MA
van der Hoek
Terry
T
Callaway
Clifton
C
D000368:Aged; D000704:Analysis of Variance; D001831:Body Temperature / Q000502:physiology*; D002170:Canada / Q000453:epidemiology; D016001:Confidence Intervals; D005260:Female; D006323:Heart Arrest / Q000401:mortality* / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D017063:Outcome Assessment, Health Care; D011446:Prospective Studies; D012042:Registries; D016019:Survival Analysis; D014481:United States / Q000453:epidemiology