Abstract Background Spinal cord ischemia (SCI) is an uncommon but devastating complication of Veno-arterial extracorporeal membrane oxygenation (VA-ECMO). Peripheral femoral cannulation, while rapidly deployable, may compromise spinal cord perfusion. We report a case of thoracolumbar spinal cord ischemia presenting as paraplegia with cauda equina enhancement in a patient on femoral VA-ECMO. Case Presentation A 57-year-old man with nonischemic cardiomyopathy (EF 30%), atrial fibrillation on apixaban, and ICD (2023) suffered a witnessed out-of-hospital cardiac arrest requiring 45 minutes of CPR before return of spontaneous circulation. Peripheral femoral-femoral VA-ECMO was initiated, complicated by left femoral artery injury requiring repair. He was supported with the right axillary Impella 5.5 and listed UNOS Status 1 for heart transplantation. On ECMO day 5, the patient developed acute bilateral lower extremity weakness with preserved sensation and allodynia of the soles. Neurologic exam demonstrated flaccid paralysis below the quadriceps, consistent with a T12 motor level (ASIA C). Given his prolonged low-flow state and ECMO configuration, spinal cord ischemia was suspected. Hemodynamic augmentation and conversion of ECMO drainage from femoral to left subclavian were performed, along with corticosteroids. Following orthotopic heart transplantation on 8/8/2025, MRI of the thoracic and lumbar spine showed thickening, clumping, and enhancement of the cauda equina nerve roots without cord infarction. CSF analysis was negative for infection or inflammation, supporting an ischemic etiology. Despite rehabilitation and neuropathic pain management with pregabalin, lower extremity weakness persisted. He was discharged to inpatient rehabilitation with residual paraplegia. Discussion SCI is a rare neurological complication of femoral VA-ECMO, likely resulting from compromised spinal perfusion due to retrograde aortic flow, vascular injury, or systemic hypoperfusion during cardiac arrest. Post-ischemic cauda equina enhancement may reflect reperfusion-related breakdown of the blood-nerve barrier. Conclusion This case underscores the need for early recognition of spinal cord ischemia in ECMO-supported patients with new-onset paraplegia. Maintaining adequate mean arterial pressure, minimizing femoral arterial compromise, and early reevaluation of cannulation strategy may mitigate irreversible neurologic injury. This abstract is funded by: None
Gala et al. (Fri,) studied this question.