I think Tim Russert died from blood clots in his legs after flying to and from Rome.
I could also be having a false memory.
Not a false memory - but you are suffering from the "Too-Lazy-to-Google-It" Syndrome!
Shortly after 1:30 pm on June 13, 2008, Russert collapsed at the offices of WRC-TV, which houses the Washington, D.C. bureau of NBC News where he was chief. He was recording voiceovers for the Sunday edition of Meet the Press. In a speech he gave at the Kennedy Center, Brian Williams said that Russert's last words were, "What's happening?" spoken as a greeting to NBC Washington bureau editing supervisor Candace Harrington as he passed her in the hallway. He then walked down the hallway to record voiceovers in the soundproof booth and collapsed. A co-worker began to perform CPR on him. The D.C. Fire and Rescue service received a call from NBC at 1:40 pm, and dispatched an EMS unit which arrived at 1:44 pm. Paramedics attempted to defibrillate Russert's heart three times, but he did not respond. Russert was then transported to Sibley Memorial Hospital, arriving at 2:23 pm, where he was pronounced dead. He was 58 years old.
Regards,