This issue of Neurosurgery Clinics of North America is Guest Edited by Drs. Paul Nyquist, Marek Mirski, and Rafael Tamargo, all from The Johns Hopkins Hospital in Baltimore, Maryland. This issue will cover important topics for the neurosurgeon in the Neurocritical Care Unit, including issues in ventilation in the patient with brain injury, ultrasound, seizures, subarachnoid hemorrhage, microdialysis, and management of brain trauma, acute spinal cord injury, and intracranial hemorrhages.

Guest Edited by experts Paul Nyquist, Neeraj Naval, and Rafael Tamargo of Johns Hopkins, this issue covers a wide range of topics related to Aneurysmal Subarachnoid Hemorrhage, including epidemiology, surgical management, endovascular treatment, non-invasive imaging techniques, risk factors and medical management of vasospasm, cerebral salt wasting, outcomes and costs, medical complications, and more.

Guest Editors Rafael J. Tamargo and Judy Huang have focused on "Cranial Arteriovenous Malformations (AVMs) and Dural Arteriovenous Fistulas (DAVFs) in this issue of Neurosurgery Clinics of North America.? Articles in this issue include: ? Arteriovenous Malformations: Epidemiology and Clinical Presentation; Dural Arteriovenous Fistulas: Epidemiology and Clinical Presentation; Historical Perspective of Treatments of Arteriovenous Malformations and Dural Arteriovenous Fistulas; Imaging of Arteriovenous Malformations and Dural Arteriovenous Fistulas; Classification Schemes for Arteriovenous Malformations; Classification Schemes for Dural Arteriovenous Fistulas; Acute Management of Ruptured Arteriovenous Malformations and Dural Arteriovenous Fistulas; Selection of Treatment Modalities or Observation of Arteriovenous Malformations; Selection of Treatment Modalities or Observation of Dural Arteriovenous Malformations; Surgical Treatment of Cranial Arteriovenous Malformations and Dural Arteriovenous Fistulas; Anesthesia Considerations and Intraoperative Monitoring During Surgery for Arteriovenous Malformations and Dural Arteriovenous Fistulas; Stereotactic Radiosurgery of Cranial Arteriovenous Malformations and Dural Arteriovenous Fistulas; Endovascular Treatment of Cranial Arteriovenous Malformations and Dural Arteriovenous Malformations; Occlusive Hyperemia Versus Normal Perfusion Pressure Breakthrough after Treatment of Cranial Arteriovenous Malformations; Vein of Galen Malformations: Epidemiology, Clinical Presentation, and Management; Carotid Cavernous Fistulas: Epidemiology, Clinical Presentation, and Management