CJCP     2013 15 (9):  771-774    ISSN: 1008-8830  CN: 43-1301/R Clinical significance of changes in T wave and ST segment amplitudes on electrocar-diogram from supine to standing position among children with unexplained chest tightness or pain in resting stage LI Yun-Li, WANG Cheng, LI Fang, LIN Ping, KANG Mei-Hua, CHU Wei-Hong, RAN Jing, WU Li-Jia Department of Pediatric Cardiovasology, Children's Medical Center, Second Xiangya Hospital of Central South University/Institute of Pediatrics of Central South University, Changsha 410011, China Received: 2013-03-22  Revised: 2013-05-13  Online: null Supporting info