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Veteran journalist Katie Couric is sharing details of a frightening health scare that left her unable to remember several hours of her day, including appearances she made at a major public event.

In a recent Substack essay, Couric, 69, recounted suffering a sudden episode of memory loss while attending the Aspen Ideas Festival in Colorado on June 27. 

She said the experience began after what had seemed like an ordinary morning, but by midday she could no longer answer basic questions, including what month or year it was or who was serving as president. 

Couric wrote that she remembers events up until about noon but has no recollection of the next several hours, despite moderating and participating in two panel discussions during the festival.

Her husband, John Molner, noticed something was wrong and took her to Aspen Valley Hospital, where physicians initially evaluated her for a possible stroke. An MRI ruled out a stroke, and doctors instead diagnosed her with transient global amnesia (TGA), a rare neurological syndrome that causes a temporary inability to form new memories.

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Sudden onset of confusion

According to the Mayo Clinic, transient global amnesia is characterized by the sudden onset of confusion and memory loss in someone who is otherwise awake and alert. During an episode, people often repeatedly ask the same questions because they cannot retain new information, even though they remain conscious and generally recognize family members. The condition usually lasts only a few hours and almost always resolves within 24 hours. 

Couric said she was unable to remember several personal details while at the hospital, including the names of some loved ones, and repeatedly introduced herself to medical staff. By the following day, her memory had largely returned, although she says several hours from that Saturday remain permanently missing. 

While transient global amnesia is considered benign and is not believed to cause permanent brain damage, physicians stress that sudden memory loss should always be treated as a medical emergency until more serious conditions have been ruled out.

Symptoms of a stroke and transient global amnesia can overlap, making immediate medical evaluation essential. Brain imaging and other neurological tests are often needed to distinguish between the two conditions.

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Exact cause unknown

The exact cause of transient global amnesia remains unknown. It most commonly affects people over age 50, and while recurrence is uncommon, researchers believe emotional stress, strenuous physical activity, sudden temperature changes, or migraines may play a role in some cases. 

Reflecting on the experience, Couric described it as “freaky” but said she feels fortunate that it was not something more serious.

Her story has drawn attention to a little-known condition and serves as a reminder that sudden confusion, disorientation, or memory loss should never be ignored, even if symptoms ultimately prove to be temporary.