Irregular heartbeats can heighten the risks for stroke and heart failure.
"Coach Harbaugh is not at the facility today under doctor's orders," the 49ers' statement said. "He is having a minor procedure done at Stanford Hospital today for an irregular heartbeat. We anticipate that he will be back at the facility tomorrow, but do not have any further information to share at this time." We do not know what form was afflicting Harbaugh, however.
Brad Seely, the 49ers' assistant head coach and special-teams coordinator, will run practice and meetings in Harbaugh's absence, the team said. There were no additional details. The specific nature of Harbaugh's condition was not revealed.
This 2010 report in the Los Angeles Times says doctors are increasingly recommending catheter ablation to treat some forms of the condition.
The 49ers face the Chicago Bears on "Monday Night Football" in Week 11.