JPMorgan CEO Jamie Dimon had emergency heart surgery as markets were crashing and coronavirus was spreading. Insiders told us exactly what happened in the 48 hours after he rushed to the hospital.

· JPMorgan CEO Jamie Dimon felt chest pains early on Thursday morning and took himself to the hospital, according to a person with knowledge of his actions. 
· When Dimon was forced to undergo emergency heart surgery, the bank kicked off a contingency plan. The health scare came as global markets were being roiled by the...