Lindsay Lohan's estranged father was hospitalized on Thanksgiving Day and was set to undergo heart surgery on Friday, according to reports.
Michael Lohan fell ill on Thursday night and was taken to the hospital with high blood pressure.
After undergoing tests, Lohan needed a stint in his heart and scheduled surgery for yesterday, according to TMZ.com. Doctors also discovered a blood clot in one of his lungs.
Lohan last underwent heart surgery in February.
He is currently in a court-ordered treatment center in Florida after pleading no contest to domestic violence charges following an altercation with ex-girlfriend Kate Major. Lohan was formally charged with domestic violence, violation of a domestic injunction and resisting arrest earlier this month.