European Heart Journal Open
Heart rate changes had sex-specific links to irregular heartbeat
Women whose resting heart rate rose by more than 12 beats per minute had a 33% higher relative risk of atrial fibrillation than those whose rates stayed stable.Women whose resting heart rate rose by more than 12 beats per minute had a 33% higher relative risk of atrial fibrillation than those whose rates stayed stable.

Cohort · 47,234 peoplePopulations
Who was studied47,234 Norwegian adults, against people with maintained resting heart rate
What changedAtrial fibrillation risk was higher with resting heart-rate increases >12 bpm versus stable rates: 33% in women, 17% in men
The catchUnderlying health changes could contribute to both resting heart rate changes and atrial fibrillation risk