Neurogenic pulmonary edema following seizures: A retrospective computed tomography study.

Introduction: Data on the frequency and clinical relevance of neurogenic pulmonary edema (NPE) following epileptic seizures are limited. The aim of the present study was to analyze computed tomography (CT) examinations in patients with previous seizures.

Method: Incidence of NPE and related clinical factors were retrospectively assessed in patients admitted because of epileptic seizures who underwent thoracic CT imaging as part of emergency diagnostics.

Results: Between January 2010 and January 2016, we included all patients admitted with the International Classification of Diseases (ICD) diagnosis code of epileptic seizure or epilepsy and who underwent CT imaging, including visualization of the lungs, as part of emergency diagnostics. Of the 47 included patients, 26 patients had suffered from generalized convulsive seizures (GCS), 17 patients had focal seizures with impaired and 4 without impaired consciousness. Signs of NPE were present in 5 out of 47 patients; all 5 patients had GCS prior to thoracic CT scan (i.e., 19% of patients with GCS). In four out of five cases, a single seizure was described; in one case, the seizure was only partially witnessed, but the indirect clinical signs strongly suggested a GCS. Related factors such as the initial respiratory rate or the initial pCO2 value were not significantly different in patients with and without signs of NPE.

Conclusions: The highly selected and biased patient group warrants caution in the interpretation of the study results. Our data, however, confirm that signs of NPE appear to be rather frequent in patients with GCS. Its clinical significance as regards morbidity and sudden death in epilepsy is discussed.