Transcript for Comedian Joan Rivers Sedated Since Arriving at Hospital
A lot more to come, Jeff Zeleny, thank you. Moving on this morning we're learning a lot more about the condition of Joan rivers, the Hollywood legend whose career has been equal parts, comedy, controversy and cosmetic surgery. She was rushed to Mt. Sinai hospital here in New York City and that is where we find ABC's Linzie Janis with the very latest. Linzie, good morning to you. Reporter: She was having a procedure on her throat when she went into cardiac arrest. She's been in a medically induced coma here ever since and this morning no word on her chances of making a full recovery. This morning sources tell ABC news that Joan rivers lay unconscious in a New York City hospital. Doctors keeping her sedated until they are more comfortable with her condition. The comedian has been under supervision for nearly 48 hours, since Thursday morning when she was rushed to the hospital after suffering cardiac arrest during a procedure at an endoscopy clinic. Her recovery likely hinges on how long she was without oxygen. Every minute that the brain goes without good oxygenated blood flow can cause serious damage. Reporter: Melissa rivers describing her mother's condition as serious and asking for prayers. Just hours before her procedure, rivers was on a New York City stage making people laugh in typical Joan fashion. I saw what's going on under my chin, I don't want to be the one the president has to pardon on Thanksgiving. In less than a week ago the funny woman and TV icon was dishing out red carpet jokes on e!'s "Fashion police." She's always been open about health discussing a scare on "Joan and melissa:joan knows bet." We have to go for a C.A.T. Scan and wait to see whether it's benign. I won't make jokes. Reporter: But also what gets her through life's tough times. Sorry. Oysters at lump. Just -- Reporter: The always entertaining often controversial rivers has received an outpouring of support from her celebrity friends from Ellen DeGeneres to Donald Trump, a lot of people speculating if it's possible to pull through this then she can do it. I think -- I would heartily endorse that speculation. There's a lot of people pulling for her. Thank you for your reporting.
This transcript has been automatically generated and may not be 100% accurate.