• Department of Cardiovascular Surgery, Gansu Provincial Hospital, Lanzhou 730000, P. R. China;
YOUTao, Email: syxzwk@126.com
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Objective To determine teratogenicity of beta-blockers in early pregnancy. Methods We searched PubMed, EMbase, Cochrane Clinical Trials, clinicaltrials.gov, CBM, Wanfang database, and CNKI from establishment of each database to December 2014. We evaluated the quality of included literature. Statistical analysis was conducted in RevMan5.3 software. Results Fifteen population-based case-control or cohort studies were identified. The score of included studies changed from 5-7 points. Based on meta-analysis, first trimester oral beta-blocker use showed no increased odds of all or major congenital anomalies. While in analysis examining organ-specific malformations, statistically increased odds of cardiovascular (CV) defects with OR 2.21 and 95% CI 1.63 to 3.01, cleft lip/palate (CL/P) with OR 3.11 and 95% CI 1.78 to 9.89, and neural tube (NT) defects with OR 3.56 and 95% CI 1.19 to 10.67 were observed. Conclusion Causality is difficult to interpret given small number of heterogeneous studies and possibility of biases. Given the frequency of this exposure in pregnancy, further research is needed.

Citation: WANGXin-kuan, YOUTao, LIUXing-guang, HOUXiao-dong, DINGFan, YIKang. Risk of Congenital Malformations Associated with Exposure to Beta-blockers Early in Pregnancy: A Systematic Review and Meta-analysis. Chinese Journal of Clinical Thoracic and Cardiovascular Surgery, 2015, 22(7): 678-684. doi: 10.7507/1007-4848.20150173 Copy

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