![]() ![]() ![]() La asociación con una maniobra de Valsalva como desencadenante del episodio en las AGTcon SDI podría implicar un mecanismo etiopatogénico en este subgrupo. La prevalencia de SDI en los pacientes con AGTes similar a la descrita en la población general, pero significativamente inferior a su prevalencia en aquellos con AITde origen indeterminado. Se observó una mayor frecuencia de SDI en el grupo de AIT (el 55,9 frente al 21,2% p < 0,001). La presencia de SDI se asoció con el antecedente de migraña (el 40 frente al 13% p = 0,014) y una maniobra de Valsalva como factor desencadenante (el 50 frente al 14,5% p = 0,022). Background and Purpose The purpose of the present study was to make an attempt to ascertain the etiology of transient global amnesia (TGA), which is still disputed more than 30 years after the first description of this clinical entity. ResultadosĮn el grupo de AGT la prevalencia de SDI fue del 21,2%. 1 This definition usefully eliminates the 24-h time limit, but is highly dependent on timely access to diagnostic tes. Comparamos la prevalencia de SDI con la de una serie de 59 casos de AITde origen indeterminado. More recently, the American Heart Association recommended a ‘tissue-based’ definition of TIA: a transient episode of neurological dysfunction caused by a focal brain, spinal cord, or retinal ischaemia, without acute infarction. Comparamos las características clínicas del episodio, los factores de riesgo vascular, el antecedente de migraña, la recurrencia de AGTy la neuroimagen entre las AGTcon y sin SDI. Recogimos de forma consecutiva 66 pacientes con AGTen los que se realizó un estudio de SDI mediante Doppler transcraneal. Por ello estudiamos la presencia de SDI en una serie de pacientes con AGTde nuestra población y la comparamos con otra población de pacientes con ataque isquémico transitorio (AIT). En recientes estudios se cita la posible asociación entre la AGTy el shunt derecha-izquierda (SDI). La amnesia global transitoria (AGT) es una entidad de etiopatogenia incierta. The association with a Valsalva manoeuvre as a precipitating factor in the TGA patients with RLS could play a role in the aetiopathogenesis of the TGA. The RLS prevalence in TGA patients is similar to the general population but significantly lower than the prevalence in TIA patients. A greater prevalence of RLS was detected in patients with TIA (55.9% versus 21.2% p < 0.001). The RLS was associated with the migraine history (40% versus 13% p=0.014) and a Valsalva manoeuvre as a triggering factor (50% versus 14.5% p=0.022). The prevalence of RLS was 21.2% in patients with TGA. We compared the prevalence of the RLS in TGA series with 59 patients with TIA. ![]() We collected data on the TGA episode, vascular risk factors, migraine history, recurrence of TGA and neuroimaging in patients with and without RLS. In these patients a transcranial Doppler was performed to determine the presence of a RLS. We studied the presence of the RLS in patients with TGA and we compared this series with patients who had suffered a transient ischaemic attack (TIA). In recent studies, TGA was associated with a right to left shunt (RLS). Afterward, my son insisted that I get the cut stitched and walked me to the emergency room, where the intake doctor ruled out any medical explanation for my fall and told me to take it easy for the rest of the day.Transient global amnesia (TGA) is a disorder of unknown aetiology. I had not hit my head and had no headache or bruises, but probably cut my chin on the bike basket.ĭuring the intervening minutes, although I remember none of this, I had apparently walked the bike to my house, brought in my backpack and helmet and put a package of spinach into the refrigerator. In these patients, MRI of the brain often times reveal punctuate focal diffusion restriction lesion in mesiotemporal region that disappear without long term sequelae. I do recall feeling great as I started a slow uphill ride on my block, something I do daily, and then remember nothing else until about 30 minutes later, when I left my house to retrieve my bicycle while holding a wet paper towel under my bleeding chin. Transient global amnesia (TGA) is a relatively uncommon neurological condition that is characterized by reversible disruption of short-term memory. A person having an attack of TGA has almost no. I was not dizzy, there was no obstacle I might have hit, and I have no memory of almost falling. A patient with anterograde amnesia may not be able to form new memories indefinitely. I now wonder if what I thought was a mild concussion was really TGA when on a beautiful September morning in 2017 I seem to have fallen off my bike for no apparent reason after swimming laps. A total of 221 patients with TGA were identified and 221 age- and sex-matched controls were included in the analysis. ![]()
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