THE BRONX - A Bronx woman was reunited today with the emergency personnel who saved her life. Rosa Thomas, who went into cardiac arrest back in March, was resuscitated by EMS workers and firefighters, and then rushed to Lincoln Hospital. She wanted to celebrate their efforts, hosting a party in their honor. "It's the best thing in the world to see something like this," says Lt. Joe Reznick, of Engine 83. "This is what we get paid for."