Arrhythmia Research Technology Inc. announced that the company's board of directors appointed Mr. Derek T. Welch, the company's Corporate Controller, to act as principal financial officer and accounting officer of the company upon the resignation, effective September 12, 2013, of Mr. David A. Garrison, who served as the Company's Executive Vice President and Chief Financial Officer. Mr. Welch has over 20 years of accounting experience across a variety of industries including retail, management consulting, manufacturing and medical devices.