CJCP     2006 8 (2):  162-163    ISSN: 1008-8830  CN: 43-1301/R Value of the P/PR segment ratio in the evaluation of the left cardiac function of children with rheumatic heart disease YUE Ding-Yuan Department of Pediatrics, People's Hospital of Lengshuijiang, Lengshuijiang, Hunan 417500, China Received: null  Revised: null  Online: null Supporting info