Paul Manafort arrives in court, Thursday, June 27, 2019 in New York. President Trump's former campaign manager is to be arraigned on state mortgage fraud charges.

Former Trump presidential campaign chief Paul Manafort was hospitalized after experiencing a medical issue in the federal prison in Pennsylvania where he is serving a 7½-year sentence, and will not appear at a scheduled hearing Wednesday in New York state criminal court, his lawyer said Tuesday.

However, that hearing in Manhattan is still scheduled to take place.

At the hearing, a judge is expected to rule on Manafort's motion to dismiss state charges of mortgage fraud, conspiracy and falsifying business records.

ABC News reported earlier Tuesday that Manafort, 70, a longtime Republican lobbyist, had experienced a "cardiac event" and has been in a Pennsylvania hospital since last Thursday.

The news broke on the same day that Rick Gates, Manafort's former business associate and a fellow top Trump campaign official, was sentenced to 45 days in jail and three years probation for conspiracy and making a false statement, in a case related to Manafort.

Manafort's attorney, Todd Blanche, said in a prepared statement that, "Neither his family nor I were made aware of his medical condition until after a reporter called with information they had learned about his condition, notwithstanding repeated attempts on our part to obtain information over the past several days from the Bureau of Prisons."