Subcortical atrophy and motor outcomes in pallidal deep brain stimulation for Parkinson's disease.
BACKGROUND: Appropriate patient selection is critical for successful deep brain stimulation (DBS) for Parkinson's disease (PD). Subcortical atrophy is a possible determinant of postoperative DBS outcomes in patients with idiopathic PD, but it has not been well evaluated for DBS of the globus pallidus interna (GPi). We investigated perioperative subcortical atrophy measures in PD patients and their relationship to postoperative motor response in bilateral GPi-targeted DBS.
METHODS: A retrospective cohort study examined correlations among indices of subcortical volumetry, disease duration, and age with postoperative outcomes at 6 months (Unified Parkinson's Disease Rating Scale-Part III motor score quotient [dUPDRS], levodopa equivalent daily dosing [LEDD], and Parkinson's Disease Questionnaire 39 [PDQ-39] mobility subscore). Subcortical volumetry was assessed by bicaudate ratio, Evans index, and third ventricular width on perioperative imaging. Linear regression models established correlations between preoperative variables and postoperative outcomes.
RESULTS: Data from 34 patients with PD who were treated with GPi-targeted DBS were evaluated. Age was found to exhibit statistically significant positive correlations with all three measures of subcortical atrophy (P ≤ 0.002). None of the measures correlated with disease duration. Only Evans index and third ventricular width correlated with preoperative medication response (P < 0.05). Age and all three measures of atrophy exhibited statistically significant correlations with dUPDRS (P ≤ 0.01), but not with LEDD or PDQ-39 motor subscores (P > 0.05).
CONCLUSION: Perioperative age and subcortical atrophy as measured in this study correlated with motor responsiveness at 6 months postoperatively among patients receiving bilateral GPi-targeted DBS stimulation for PD.
Digital Object Identifier (DOI)
Hamed, Moath A; Ponce, Francisco A; Lambert, Margaret; and Moguel-Cobos, Guillermo, "Subcortical atrophy and motor outcomes in pallidal deep brain stimulation for Parkinson's disease." (2020). Neurosurgery. 654.