
Dimon, 63, who is the longest-serving head of a major U.S. bank, experienced "an acute aortic dissection" and underwent surgery to repair it Thursday morning, a JPMorgan memo said.
(Image credit: Mark Lennihan/AP)

Dimon, 63, who is the longest-serving head of a major U.S. bank, experienced "an acute aortic dissection" and underwent surgery to repair it Thursday morning, a JPMorgan memo said.
(Image credit: Mark Lennihan/AP)