Doctors in Chicago have found the reason for Riccardo Muti's fall during a 3 February rehearsal in which his jaw was broken. The Chicago Symphony Orchestra have issued a press release which explains his fainting was caused by an irregular heartbeat. A pacemaker has now been fitted to correct it, but it's unlikely the maestro will be back on the podium any time soon, as (not surprisingly) he's been advised to rest. The long-term prognosis is good: "Patients with pacemakers live full and active lives," a doctor is quoted as saying.
Earlier press releases can be found here.