A paradoxical cause of hypoxia and orthodeoxia in a stroke patient

1 Department of Physiology, School of Medicine, Faculty of Health Sciences, University of Pretoria, South Africa 2 Department of Internal Medicine, School of Medicine, Faculty of Health Sciences, University of Pretoria and Steve Biko Academic Hospital, Pretoria, South Africa 3 Department of Radiology, School of Medicine, Faculty of Health Sciences, University of Pretoria and Steve Biko Academic Hospital, Pretoria, South Africa