ObjectiveTo investigate the value of Color Doppler Flowing Imaging in the diagnosis of female breast diseases,analysis of the clinical characteristics of breast disease.Methods The data of 451 patients with breast disease which diagnosed by Color Doppler Flowing Imaging were retrospectively analyzed,the statistical results and clinical treatment were analyzed finally.Results In all cases,the top three were breast hyperplasia,breast fibroids,and breast cancer,accounting for 56.1％,10.6％ and 5.3％ ;breast hyperplasia was the highest incidence in all ages,and it showed an increasing trend before the age of 50,gradually decreased after 50 years old; the breast adenofibroma was the highest incidence in the 30 years of age and gradually decreased with increasing age;breast cancer frequently occurring in women after the age of 60,but the deterioration tendency often appears in the age 40 to 50.ConclusionTo diagnose the breast disease by Color Doppler Flowing Imaging,the doctor should combine with breast disease characteristics of the disease,as well as patient age,medical history and other factors on the results of a comprehensive diagnosis.

Objective    To investigate effectiveness and safety of transcatheter aortic valve replacement in the treatment of aortic regurgitation. Methods     PubMed, EMbase, The Cochrane Library, Web of Science, CNKI, Wanfang Data and VIP were searched from inception to August 2021. According to the criteria of inclusion and exclusion, two reviewers independently screened the literature, extracted the data and evaluated the quality of the included studies. Then, Stata 16.0 software was used for meta-analysis. Subgroup meta-analysis of valve type used and study type was performed. Results    Twenty-five studies (12 cohort studies and 13 single-arm studies) were included with 4 370 patients. Meta-analysis results showed that an incidence of device success was 87% (95%CI 0.81-0.92). The success rate of the new generation valve subgroup was 93% (95%CI 0.89-0.96), and the early generation valve subgroup was 66% (95%CI 0.56-0.75). In addition, the 30-day all-cause mortality was 7% (95%CI 0.05-0.10), the 30-day cardiac mortality was 4% (95%CI 0.01-0.07), the incidence of pacemaker implantation was 10% (95%CI 0.08-0.13), and the incidence of conversion to thoraco-tomy was 2% (95%CI 0.01-0.04). The incidence of moderate or higher paravalvular aortic regurgitation was 6% (95%CI  0.03-0.09). Conclusion     Transcatheter aortic valve replacement for aortic regurgitation is safe and yields good results, but some limitations can not be overcome. Therefore, multicenter randomized controlled trials are needed to confirm our results.