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 revenue of $14.2 million for its second quarter of 2010 and a record low loss from operations and net loss per share. Revenue from product sales in the United States was $11.8 million. International revenue was $2.3 million, which included a one-time unfavorable impact of $0.4 million associated with transitioning a large international market from a distributor stocking model to a direct selling model.