An electrical injury is defined as sequelae caused by accidental contact with human-made or generated electrical power. A high-voltage electrical burn can cause many complications of numerous body systems within an individual's body, including the cardiac, respiratory, musculoskeletal, and central nervous systems. The radiologic features of this rare and sometimes life-threatening injury have occasionally been described in the literature. However, to the best of our knowledge, there have been no reports in Korea on the arteriographic and MR imaging findings of high-voltage electrical burn involving the body's upper extremity. In this article, we describe the imaging findings of a case involving a high-voltage electrical burn in the upper extremity, with an emphasis on the arteriographic and MR imaging findings and a review of the literature.