This is the moment Kim Kardashian learned of Kanye West's breakdown.

News that Kanye West had been rushed to hospital after a breakdown at a Los Angeles home in November last year worried fans worldwide.

No one was hit harder than his wife Kim Kardashian, who, while sitting with her sister Kourtney and mum Kris in a New York building, received a call that made her feel sick.

As with almost everything in the reality star’s life, the moment was captured by cameras that follow the family and will be replayed during an upcoming episode of Keeping Up With The Kardashians.

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In a preview clip for the episode, which will air on E! this weekend, Kim can be heard having an intense conversation with one of Kayne’s friends.

“Why? What’s going on?” she asks, beginning to become distressed. “What’s wrong?”

“Don’t scare me please, what’s going on?”

As the phone call continues, the 36-year-old can be heard saying “I can’t” before she breaks down in tears.

Composing herself after the conversation, she tells her sister, “he’s like crying on the phone to me and he wouldn’t say what’s wrong.”

One of Kanye's friend called to tell Kim the news. (Image via E!)

Describing the moment, the mother-of-two says her "heart drops" when she receives the call from Kanye's friend.

"They're not telling me anything and I am so scared and I don't know what to do," she says to the camera.

Kanye was rushed to UCLA Medical Centre to be treated for exhaustion after he collapsed at the home of his personal trainer.

This came after the Life of Pablo creator had ended a performance just three songs in and cancelled 21 dates in the US for concerts as part of his Saint Pablo Tour.

It was later reported that the rapper had been triggered by the anniversary of his mother's funeral.

Are you watching this season of Keeping Up With The Kardashians?