Outcomes of Seizures in Patients with Systemic Lupus Erythematosus in a Tertiary Government Hospital in the Philippines

Abstract

Background. Seizures in patients with systemic lupus erythematosus (SLE) are uncommon but life-threatening; mortality rate is 25-29%. Seizure in a person with lupus may be due to lupus itself or other conditions. There are no published studies describing the causes and outcomes of seizures in Filipino patients with lupus.
 Objective. To describe the causes and outcomes of seizure in a cohort of patients with lupus seen at Philippine General Hospital.
 Methodology. We reviewed the medical records of patients with SLE) with a documented seizure and admitted between January 2016 and April 2019. History, physical examination and laboratory findings, and clinical course were obtained.
 Results. We included 29 patients with 31 seizure events. They were all women, mostly single, of low socio-economic status, and had poor functional capacity. Lupus was active in 77.4% (24/31), commonly with mucocutaneous or hematologic manifestations. Seizures were generalized in 87 % (27/31). Prior to seizure, one-third had headache, fever, and vomiting. There were no neurologic localizing signs. Twenty-four seizure events (77%) occurred among patients with active lupus; 16 (67%) was attributed to neuropsychiatric systemic lupus erythematosus (NPSLE) and eight (33%) to other causes: infection (tuberculous meningitis and septic encephalopathy), posterior reversible encephalopathy syndrome (PRES), uremia, arrhythmia, and eclampsia. Seven seizures in inactive lupus were not SLE-related. Mortality rate was 28%; infection was the most common cause. Seizure resolved in 97%. Mean duration of hospitalization was 26.7 days. Patients were discharged improved from 19 seizure events (18 patients); 14 had follow-up consultations, three were readmitted. There was no seizure recurrence within 30 days of discharge. There was improvement in functional capacity.
 Conclusion. The most common cause of seizure was NPSLE, followed by infection. Despite high rates of complete seizure resolution, poor outcomes were noted in almost half of the patients. Prolonged hospitalization was common. A high rate of mortality was observed. Infection was the most common cause of mortality.