Contrast Extravasation Mimicking Subarachnoid Hemorrhage After Cardiac Catheterization.

Neurological complications after coronary angiography are rare but associated with significant mortality and morbidity. These include ischemic and hemorrhagic strokes, and transient ischemic attacks. Rarely, contrast media can cross the blood brain barrier causing transient neurological symptoms including confusion and seizures. On imaging, it can mimic a subarachnoid hemorrhage (SAH). Blood can be differentiated from contrast media using MRI. We present a patient who developed confusion after undergoing cardiac angiography and the initial CT of the brain showed SAH. However, MRI of the brain did not reveal any hemorrhage indicating contrast staining.