PATENT FORAMEN OVALE AND INTERNAL JUGULAR VALVE INCOMPETENCE IN TRANSIENT GLOBAL AMNESIA: A CONTRAST TRANSCRANIAL DOPPLER SONOGRAPHY AND COLOR FLOW IMAGING OF INTERNAL JUGULAR VEIN: PERVIETA DEL FORAME OVALE ED INCONTINENZA DELLE VALVOLE GIUGULARI IN

摘要

Valsalvalike activities often precede the onset of transient global amnesia (TGA) (1). The pathogenesis of TGA is still unknown. Both paradoxical embolism due to a patent foramen ovale (2) and venous cerebral ischemia due to internal jugular valve incompetence (IJVI) (1) have been proposed as causative factors.