The Vienna General Hospital said the procedure was needed due to a "serious lung illness" that The Österreich reported came after an infection the Austrian picked up while on vacation in Ibiza, Spain.
Lauda is expected to remain in hospital for many weeks with an expected recovery period of between three and four weeks for someone of his age.
At it prepared to head off into the summer break, Mercedes took to social media last night, as Toto Wolff sent a series of "get well soon" tweets to Niki Lauda, who is recovering from surgery after undergoing a lung transplant. For all of us at Mercedes he is our chairman, our mentor and our friend. "But knowing Niki, I'm sure he will soon be telling every nurse and doctor that he has had enough of the hospital", Wolff said.
The recovery he now faces is not a race.
Resuelven un gran misterio: qué pasa en el Triángulo de las Bermudas
Cientos de barcos , aviones y personas han desaparecido a lo largo de los años en el área entre Bermudas , Puerto Rico y Florida . Un equipo de científicos británicos cree que ha podido hallar el verdadero problema de esta zona tan misteriosa.
"Considering the not very easy circumstances we are very, very happy with the developments", Klepetko said, adding the hospital would release a comprehensive update about Lauda's condition at a later time.
"We wish him a safe and speedy recovery - in that order - and send all our positive energy to him and his family".
"Everything is now going very well and we are very satisfied [with his recovery so far]", Dr Klepetko told Austria's ORF broadcaster, before adding: "One can definitely assume that [the need for] lung transplantation is not a late effect of the accident". "I miss you my friend".