Effective July 24, 2019, Scott Bartos resigned from the Board of Directors of Cardiovascular Systems, Inc. Mr. Bartos' resignation was not due to a disagreement with the Company. On July 25, 2019, the Board of Directors of the Company elected Erik Paulsen as a Class I director to fill the vacancy created by Mr. Bartos' resignation. The Board of Directors also appointed Mr. Paulsen as a member of the Governance/Nominating Committee. Paulsen was not elected to the Board of Directors pursuant to any arrangement or understanding between him and any other person. From 2009 to 2019, Paulsen represented Minnesota's Third Congressional District in the United States House of Representatives. During his tenure, Paulsen was a leading member on the House Ways and Means Committee. He also served as Chairman of Congress' Joint Economic Committee.