Eddy Curry officially became a member of the Knicks about 6 p.m. Eastern time Tuesday, bringing with him all of the uncertainty and the medical issues that caused the Chicago Bulls to let him go.

Curry is one of the most talented young big men in the N.B.A. and, at 22, has his best years ahead of him. He also has an irregular heartbeat and may be predisposed to a heart condition that has proved fatal in other athletes. It was that fear, and Curry's reluctance to take a genetic test to clarify matters, that prompted Chicago to trade him to the Knicks for a package of lesser players and draft picks.

Two hours after the trade was approved by the league, Knicks officials insisted they were doing everything they could to clarify Curry's health issues. But they will not ask Curry to take the DNA test, a step recommended by a prominent expert in the field. The Knicks will rely on other tests, said Isiah Thomas, the Knicks' president, who disagreed that acquiring Curry was a risk.

"We've followed this for a while, and the research that we've done from afar led us to the point where we thought we could make a trade for him," Thomas said after the Knicks' first day of training camp at the College of Charleston. "We've talked to all of our doctors, and now the second phase of it is to get our hands on and get an eyeball on him."

Curry had a physical examination in New York on Tuesday and was scheduled for more tests Wednesday morning. He could join the Knicks in time for practice Wednesday evening.

If Curry fails a physical examination, the Knicks could rescind the trade.

The Knicks previously reviewed Curry's medical records, including those related to his heart condition, and Thomas said team doctors consulted with the heart specialists who examined Curry the last few months.

"I feel very confident in our medical staff, that if he passes the physical, we'll be real lucky to have gotten a guy such as this," Thomas said. "They don't come along that often."