Title of article :
Aetiology of transient global amnesia
Author/Authors :
Steven M. Lewis، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1998
Pages :
1
From page :
397
To page :
397
Abstract :
The pathophysiology of transient global amnesia (TGA) has been obscure since the definition of this syndrome more than 30 years ago. Current hypotheses include migraine, seizure, or transient cerebral arterial ischaemia. However, none of these potential mechanisms explain both the absence of other neurological signs or symptoms during TGA, and its frequent precipitating activities: many of which would be expected to result in marked increases in venous return from the arms to the superior vena cava. Patients with TGA also commonly have a Valsalva manoeuvre at the onset of attacks. I suggest that a Valsalva manoeuvre, blocking venous return through the superior vena cava, may allow brief retrograde transmission of high venous pressure from the arms to the cerebral venous system, resulting in venous ischaemia to the diencephalon or mesial temporal lobes and to TGA.
Journal title :
The Lancet
Serial Year :
1998
Journal title :
The Lancet
Record number :
577954
Link To Document :
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