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Published on: January 30, 2020
Strict versus moderate glucose control after resuscitation from ventricular fibrillation
Tuomas Oksanen1, Markus B Skrifvars, Tero Varpula
1Helsinki University Hospital, Intensive Care Units, Jorvi Hospital, Turuntie 150, 02740 Espoo, Finland. tuomas.oksanen@hus.fi
Insights
Strict glucose control in out-of-hospital cardiac arrest (OHCA) patients did not improve survival compared to moderate control. This study found no additional survival benefit, with similar mortality rates between groups.
Area of Science:
- Cardiology
- Intensive Care Medicine
- Metabolic Disorders
Background:
- Elevated blood glucose levels post-resuscitation are linked to poorer outcomes in out-of-hospital cardiac arrest (OHCA) patients.
- Therapeutic hypothermia is a standard treatment for OHCA survivors.
Purpose of the Study:
- To investigate whether strict glucose control using intensive insulin therapy improves outcomes in OHCA patients.
- To compare the efficacy and safety of strict versus moderate glucose control in OHCA survivors.
Main Methods:
- A randomized controlled trial was conducted in two university hospital intensive care units.
- Ninety OHCA patients with ventricular fibrillation were randomized into strict (4-6 mmol/l) or moderate (6-8 mmol/l) glucose control groups.
- Both groups received insulin infusion for 48 hours, with therapeutic hypothermia applied.
Main Results:
- The strict glucose control group achieved better glycemic targets (71% vs 41%) with a median glucose of 5.0 mmol/l versus 6.4 mmol/l.
- Moderate hypoglycemia occurred more frequently in the strict control group (18% vs 2%).
- Thirty-day mortality rates were similar: 33% in the strict group and 35% in the moderate group (p=0.846).
Conclusions:
- Strict glucose control (4-6 mmol/l) offers no additional survival benefit compared to moderate control (6-8 mmol/l) in OHCA patients treated with therapeutic hypothermia.
- The study did not find improved survival with tighter glycemic management in this patient population.
- Further research may be needed to define optimal glucose targets in OHCA patients.
Objective:
Elevated blood glucose is associated with poor outcome in patients resuscitated from out-of-hospital cardiac arrest (OHCA). Our aim was to determine whether strict glucose control with intensive insulin treatment improves outcome of OHCA patients.
Design:
A randomized, controlled trial.
Setting:
Two university hospital intensive care units.
Patients:
Ninety patients resuscitated from OHCA with ventricular fibrillation detected as the initial rhythm were treated with therapeutic hypothermia.
Interventions:
Patients were randomized into two treatment groups: a strict glucose control group (SGC group), with a blood glucose target of 4-6 mmol/l, or a moderate glucose control group (MGC group), with a blood glucose target of 6-8 mmol/l. Both groups were treated with insulin infusion for 48 h, because a control group with no treatment was considered unethical.
Measurements And Results:
Baseline data were similar in both groups. In the SGC group 71% of the glucose measurements were within the target range compared with 41% in the MGC group. Median glucose was 5.0 mmol/l in the SGC group and 6.4 mmol/l in the MGC group. The occurrence of moderate hypoglycemic episodes was 18% in the SGC group and 2% in the MGC group (p = 0.008). No episodes of severe hypoglycemia occurred. Mortality by day 30 was 33% in the SGC group and 35% in the MGC group (p = 0.846); the difference was 2% (95% CI -18% to +22%).
Conclusions:
We found no additional survival benefit from strict glucose control compared with moderate glucose control with a target between 6 and 8 mmol/l in OHCA patients.
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