Clinical evaluation of 625 lacunar syndrome patients

Abstract

Aim: Lacunar syndromes consist of a group of characteristic clinical presentations that are usually compatible with a small deep infarct. Validation of these syndromes could help neurologists predict the prognosis and type of cerebrovascular disease. Materials and Methods: Consecutive stroke patients on 2 Iranian stroke registries compiled between 2001 and 2007 were enrolled in this prospective validation study. Lacunar syndromes were defined as pure motor, pure sensory, mixed sensory motor, ataxic hemiparesis, dysarthria clumsy hand, and atypical subtypes. All of the patients with ischemic stroke had at least one brain CT scan performed 48 h after stroke. Patients whose CT scan showed a corresponding lacuna and patients with no visible new lacuna or other new lesion were assumed as appropriate to the lacunar infarction. Results: Lacunar syndrome was observed in 625 patients (286 female, 339 male; mean age: 68.05 ± 8.9 years), accounting for 21.3% of the patients on our stroke registry. Lacunar syndromes were detected with a sensitivity of 83.7%, specificity of 96.5%, PPV of 87.8%, and NPV of 95.4% (CI: 95%). Brain CTs of 546 patients (87.4%) were appropriate to lacunar infarct. All subtypes of lacunar syndrome had more than 97% specificity. Pure motor and mixed sensory motor syndromes were associated with a PPV of 82.9% and 81.5%, respectively. Pure sensory syndrome, ataxic hemiparesis, dysarthria clumsy hand, and atypical lacunar syndromes had a PPV of 96.6%, 97.5%, 100%, and 95.4%, respectively. Conclusions: Lacunar syndromes have moderate to high sensitivity and high specificity for the detection of lacunar brain infarction. Brain CTs in 12.6% of patients with lacunar syndrome did not correspond with lacunar stroke.