Primary Intraventricular Hemorrhage: Clinical Characteristics and Outcomes.

BACKGROUND: Primary intraventricular hemorrhage (IVH) in adults is a rare neurologic disorder. The typical course, etiology, complications, and outcomes have not been well established.

MATERIALS AND METHODS: Consecutive patient records with a diagnosis of intracerebral hemorrhage admitted between May 2009 and June 2014 at a tertiary care center were retrospectively reviewed. Subjects were included in the study cohort if all neurologists and the radiology report agreed that the subject had an isolated IVH. Patients with intraparenchymal hemorrhage, subarachnoid hemorrhage, malignancy with hemorrhagic components, and hemorrhagic transformation of ischemic stroke were excluded. The electronic medical record, imaging report, and imaging studies were reviewed.

FINDINGS: Of 1692 cases reviewed, 33 (1.9%) had primary IVH. The most common presenting symptoms included altered mental status (48.5%), headache, (39.4%), and nausea (24.2%). In 36.3%, hypertension was found to be a contributing factor; 27.2% were attributed solely to hypertension. Vascular abnormalities were the primary etiology in 21.3% of patients. When observing outcomes, 61.8% were discharged home or to rehab, whereas 20.5% died or were placed in hospice care. A higher Graeb score was associated with an increased likelihood of death or hospice (8 versus 5, P = .02) CONCLUSION: This study is one of few to describe the etiology, contributing factors, and outcomes of primary IVH. As in prior studies, hypertension was a contributing factor, and vascular lesions were less common than expected. More research is necessary to further define the course and characteristics of this rare type of intracerebral hemorrhage.