Attacks must be witnessed and information must be available from a capable observer.
Clear-cut anterograde amnesia must be present during the attack.
Clouding of consciousness and loss of personal identity must be absent and cognitive impairment must be limited to amnesia.
There must be no accompanying focal neurological symptoms or signs, and epileptic features must be absent.
Attacks must resolve within 24 hours.
Patients with a recent head injury or known active epilepsy are excluded.
Patients with many other clinical �entities may present with amnesia and these may need to be ruled out before the diagnosis of TGA can be made. These conditions include alcoholic “blackouts,” TIA (transient ischemic attack), temporal lobe epilepsy, brain tumor, drug reactions, and intracerebral or subarachnoid hemorrhage.
- Transient ischemic attack (TIA, Mini-Stroke)
A neurological event with the signs and symptoms of a stroke, but which go away within a short period of time. Also called a mini-stroke, a TIA is due to a temporary lack of adequate blood and oxygen (ischemia) to the brain. This is often caused by the narrowing (or, less often, ulceration) of the […]
The passing of a strong beam of light through a part of the body for medical inspection. A method of examination by the passage of light through tissues or a body cavity. A common use of transillumination is in infancy. The infant’s skull should normally not transilluminate (let a beam of light pass through it). […]
- Transitional cell carcinoma
Cancer that develops in the lining of the renal pelvis, ureter, or bladder.
- Transjugular intrahepatic portosystemic shunt
A shunt that allows blood from the portal circulation (that supplies the liver) to flow into the systemic (general) circulation. Transjugular intrahepatic portosystemic shunt involves catheterization of a hepatic (liver) vein by the transjugular approach (through the jugular vein) followed by puncture of an intrahepatic portal vein and placement and expansion of a stent to […]
- Transjugular, intrahepatic, portosystemic shunt
A shunt (tube) placed between the portal vein which carries blood from the intestines to the liver and the hepatic vein which carries blood from the liver back to the heart. It is used primarily (but not exclusively) in patients with cirrhosis in which the scar tissue within the liver has blocked the flow of […]