Highlights From the <i>Circulation</i> Family of Journals

In patients with atrial fibrillation, there is an increased risk of stroke associated with diabetes mellitus. There is little known about the association between elevated hemoglobin A1c and stroke risk in these patients. This analysis from Danish registries evaluated the effect of glycemic status measured by hemoglobin A1c on the risk of thromboembolism. Increasing levels of hemoglobin A1c were associated with a higher risk of thromboembolism, suggesting a more graded association of stroke risk and diabetes control; however, no association was found in patients with diabetes mellitus duration 10 years.