Abstract T P405: Improvement in Midline Shift is Associated with Survival After Decompressive HemiCraniectomy in Large Hemispheric Infarctions
Background and Purpose: It remains uncertain which patients with malignant edema after large hemispheric infarction (LHI) remain at risk of death despite decompressive hemicraniectomy (DHC). We investigated factors associated with in-hospital mortality in a cohort of patients with LHI who underwent DHC.
Methodology: This retrospective cohort study conducted over a five-year period identified 24 LHI patients who underwent DHC. Patient demographics, pre- and post-DHC clinical and neuro-imaging data were recorded (including midline shift [MLS] at the level of lateral ventricles). These variables were then analyzed in relation to in-hospital mortality.
Results: Patients were predominantly male (17/24), with mean age of 55±15 years and baseline NIHSS score of 18.5± 4. Despite DHC, performed at a median of 52 hours, mortality still occurred in 9 patients (38%), with 11 (46%) going to acute rehabilitation and remainder to long-term care facility (LTC). Patients had a mean pre-operative MLS of 11 ± 3 mm. When compared with a head CT obtained 48 hours after DHC, MLS improved the most in patients going to rehabilitation (by 6 ± 4.2 mm), compared to those going to LTC (3.2 ± 5 mm), while the least improvement was seen in those who died (1 ± 5 mm). Survivors had significant improvement in MLS (5.3 ± 4.4 mm) compared to the non-survivors (1 ± 5 mm), p = 0.04. The survivors were also significantly younger (50 ± 17 years) compared to those who died (62 ± 7 years). Thirteen patients (54% of the cohort) received intracranial pressure (ICP) monitors ipsilateral to the infarct during DHC but measured ICPs were statistically similar in survivors vs non-survivors. Other variables (baseline NIHSS score, MLS and time to surgery) did not predict death in the cohort.
Conclusion: Mortality remains high in LHI patients even after DHC. Improvement in MLS after DHC appears to separate survivors from non-survivors while post-DHC ICPs do not. However, our sample size is small and additional studies with larger population sizes are required for validation of our findings.
Author Disclosures: J.I. Ramiro: None. R. Dhar: None. E. Feen: None. A. Kumar: None.
- © 2015 by American Heart Association, Inc.