MUTTI AINDA HOSPITALIZADO

February 11, 2011 7:02 PM ET

Cause of Muti Collapse Determined

In a joint statement with Mr. Muti and officials of the orchestra, two cardiologists at the Northwestern University Feinberg School of Medicine, Donald Lloyd-Jones and Bradley P. Knight, reported on Friday that Mr. Muti had fainted because of "a common heart rhythm disturbance."

NYTIMES