Association of benign joint hypermobility syndrome with mitral valve prolapse in Iranian children
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Aim and purpose: The aim of this study was to determine the association of benign joint hypermobility syndrome (BJHS) with mitral valve prolapse. Subjects and methods: This is a case-control study. Sixtythree children with benign joint hypermobility syndrome were included in case group and 63 without any rheumatologic disease were placed in control group. We used Carter-Wilkinson and Beighton criteria for diagnosing of benign joint hypermobility syndrome. Mitral valve prolapse was evaluated by echocardiography in both groups. The mitral leaflet displacement > 2 mm considered as cut off for diagnosis of mitral valve prolapse. Cardiologist did not have any information about patients group during echocardiography. Data was analysed using SPSS ver. 13.0. Chi-square used for comparison. Results: In this study, 32 girls and 31 boys were included. Mean of age in case group was 7.1±2.67 and for control was 6.9±3.25 years. Mitral valve prolapse was discovered in 54% of cases and 12.7% of control groups (P=0.001). Mitral valve prolapse was significantly higher among cases with BJHS aged > 7 (58.8%) year compared to 3-7 (41.2%) year of age (P=0.027). Heart murmur and palpitation was more common among children with benign joint hypermobility syndrome with mitral valve prolapse compared to children without mitral valve prolapse (P < 0.05). Conclusion: The incidence of mitral valve prolapse among children with benign joint hypermobility was significantly higher than control group.