India, May 11 -- Veteran NASCAR driver Kyle Busch raised concerns during Sunday's Go Bowling at The Glen when he was heard asking for medical assistance over the team radio while still racing at full speed.

The No. 8 Chevrolet driver maintained a position within the top five during the NASCAR Cup Series event, but his calm and straightforward request for a doctor to be available immediately after the race quickly diverted attention from his performance on the track to his health condition.

"Can somebody try to find Bill Heisel? He's the Hendrick doctor, tell him I need him after the race," Busch instructed his team during the race. When the team inquired if he preferred Heisel to come to the car or the bus, Busch replied: "Uh, bus. I'm ...