|            AtriCure            Reports First Quarter 2015 Financial Results and Updates 2015 Outlook          |                           -- Revenue of        $29.9 million -- up 20.3% as reported, 24% constant currency -- U.S.        sales of $22.9 million -- up 26.3% -- International sales of $7.0        million -- up 3.9% as reported, 17.6% constant currency WEST CHESTER,        Ohio--(BUSINESS WIRE)--April 29, 2015--
  AtriCure, Inc. (Nasdaq:        ATRC), a leading innovator in technologies for the surgical treatment of        atrial fibrillation and left atrial appendage management, today        announced first quarter 2015 financial results.
  "We had a strong        start to the year and remain well positioned to help treat patients        suffering from atrial fibrillation through our continued investment in        education, training and growth initiatives," said Mike Carrel, President        and Chief Executive Officer of AtriCure.
  "We are particularly        excited about partnering with the American Association for Thoracic        Surgery (AATS) Graham Foundation to initiate the inaugural Dr. James Cox        Fellowship in Atrial Fibrillation Surgery. Educational efforts such as        this will increase awareness and the ability of physicians to treat        atrial fibrillation and manage the left atrial appendage. We continue to        work toward penetrating the multi-billion dollar market opportunity        ahead of us, which is increasingly being validated by leading        physicians," continued Mr. Carrel.
  First Quarter 2015        Financial Results
  Revenue for the first quarter of 2015 was $29.9        million, an increase of $5.0 million or 20.3% (24.0% on a constant        currency basis), compared to first quarter 2014 revenue. Domestic        revenue increased 26.3% to $22.9 million, driven by strong sales of        ablation-related open-heart products, ablation-related minimally        invasive products, and AtriClip products. International revenue was $7.0        million, an increase of $0.3 million or 3.9% (17.6% on a constant        currency basis) compared to $6.7 million for the first quarter of 2014.        International revenue growth was driven primarily by increases in        product sales in Europe.
  Gross profit for the first quarter of        2015 was $21.7 million compared to $17.7 million for the first quarter        of 2014. Gross margin for the first quarter of 2015 and 2014 was 72.7%        and 71.1%, respectively. The increase in gross margin was primarily due        to the heavier U.S. sales mix, favorable product costs and the        elimination of certain acquisition transition costs included in the        three months ended March 31, 2014.
  Operating expenses for the        first quarter of 2015 increased 5.1%, or $1.3 million, compared to the        first quarter of 2014. The increase in operating expenses was driven        primarily by an increase in selling, clinical, product development, and        training expenses partially offset by certain acquisition transition        costs included in the three months ended March 31, 2014.
  Loss        from operations for the first quarter of 2015 was $5.1 million, compared        to $7.9 million for the first quarter of 2014. Adjusted EBITDA, a        non-GAAP measure, was a loss of $2.1 million for the first quarter of        2015, compared to a $4.7 million loss for the first quarter of 2014. Net        loss per share was $0.19 for the first quarter of 2015 and $0.31 for the        first quarter of 2014.
  2015 Guidance
  Management projects        that 2015 revenue will be in the range of $123.5 million to $125.5        million, which represents an increase of 15% to 17% over 2014 (17% to        19% on a constant currency basis). This compares to previous        expectations of 2015 revenue in the range of $122.5 million to $124.5        million.
  Management continues to project Adjusted EBITDA, a        non-GAAP measure, to be a loss in the range of $7 million to $9 million        for 2015 in order to continue making strategic investments to drive the        long-term growth plan.
  Conference Call
  AtriCure will host        a conference call at 4:30 p.m. Eastern Time on Wednesday, April 29, 2015        to discuss its first quarter 2015 financial results. A live webcast of        the conference call will be available online on the Investors page of        AtriCure's corporate website at www.atricure.com. You may also access        this call through an operator by calling (866) 515-2911 for domestic        callers and (617) 399-5125 for international callers at least 15 minutes        prior to the call start time using participant passcode 15114945.
  The        webcast will be available on AtriCure's website and a telephonic replay        of the call will be available through May 6, 2015. The replay dial-in        numbers are (888) 286-8010 for domestic callers and (617) 801-6888 for        international callers. The participant passcode is 62321731.
  About        AtriCure, Inc.
  AtriCure, Inc. is a medical device company        providing innovative atrial fibrillation (Afib) solutions designed to        produce superior outcomes that reduce the economic and social burden of        atrial fibrillation. AtriCure's Synergy(TM) Ablation System is the first        and only surgical device approved for the treatment of persistent and        longstanding persistent forms of Afib in patients undergoing certain        open concomitant procedures. AtriCure's AtriClip left atrial appendage        management (LAAM) exclusion device is the most widely sold device        worldwide that's indicated for the occlusion of the left atrial        appendage. The company believes cardiothoracic surgeons are adopting its        ablation and LAAM devices for the treatment of Afib and reduction of        Afib related complications such as stroke. Afib affects more than 33        million people worldwide.
  Forward-Looking Statements      |