WEST CHESTER, Ohio--(BUSINESS WIRE)--AtriCure, Inc. (Nasdaq: ATRC), a medical device company and a leader in cardiac surgical ablation systems and systems for the exclusion of the left atrial appendage, today announced financial results for the third quarter of 2011. Revenue was $15.2 million, reflecting 5.2 percent growth over the third quarter of 2010. Revenue from product sales in the United States was $11.8 million, reflecting growth of 1.8 percent, and international revenue was $3.5 million, reflecting 18.7 percent growth on a GAAP basis and 14.3 percent growth on a constant currency basis.