Kim Kardashian is revealing a major health scare on season 7 of The Kardashians.

In a trailer that played at the beginning of the Thursday, October 23, episode, Kim, 45, lying in an MRI machine. She’s later seen talking to sister Kourtney Kardashian, explaining that the scan found “a little aneurysm.” Kourtney, 46, was taken aback and put her hand over her heart, saying, “Whoa.”

Kim added that the doctors suspect the aneurysm — which is marked by swelling in a blood vessel in your brain — is likely related to “stress.” (Brain aneurysms are common, and most don’t rupture or cause serious health issues. However, a rupture can become life-threatening.)

Elsewhere in the episode, Kim opened up about the fallout from her divorce with Kanye West, with whom she shares kids North, 11, Saint, 8,

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