Can Posterior Fossa Lesions Be A Place For Preventive Patent Foramen Ovale Transcatheter Closure?
Case 1. A 40-year-old woman presented for elective posterior fossa craniectomy. She had a past history of headache, dizziness, diplopia, and transient ischaemic attacks. A diagnosis of Chiari type I malformation was made with magnetic resonance imaging study which revealed caudal displacement of the cerebellar tonsils, crowding of the foramen magnum, and a 3 x 2.5 cm lesion consistent with a meningioma in the right temporal lobe. The patient’s weight and height were 53 Kg and 162 cm, respectively; she had no history of cardiopulmonary, renal or liver diseases and she wasn’t receiving any type of drugs before operation. Her blood pressure was 110/70 mmHg supine with no postural hypotension. Her resting heart rate was 60 beats/min with normal heart rate variability in response to respiration and the Valsalva maneuver. Cervical spine mobility was normal and airway and neurological examinations were unremarkable. Standard preoperative evaluation included: 1) laboratory studies, i.e. comple
