Objective To explore the change in cardiac function in patients with idiopathic frequent premature ventricular contraction(PVC) after radiofrequency catheter ablation(RFCA) and drug control by ultrasound Doppler and noninvasive hemodynamic detection technique.Methods Forty-eight patients with idiopathic frequent PVC were selected as the test group with a total of(16 391.03±10 873.01)beats per day.Another 55 healthy subjects were selected as the control group.Heart ultrasound Doppler and noninvasive hemodynamic detection technique were used in the two groups.Twenty-five patients were selected from the PVC group to receive RFCA,while noninvasive hemodynamic detection technique was adopted 3 days after operation.Results by ultrasound Doppler and noninvasive hemodynamic detection technique were compared between the two groups before and after operation.Results There was no significant difference in left ventricular ejection fraction(LVEF),left ventricular end-diastolic dimension(LVEDD),left ventricular end-systolic dimension (LVESD),left atrial diameter(LA)and the ratios of the peak mitral flow velocity in early diastole (E) to the peak atrial kick velocity (A) between the two groups.HI,SI,CI and C in PVC group were significantly lower than those in control group(P<0.01),but WA,O,WA/C and O/C were significantly higher than those in control group(P<0.01).HI,SI,CI and C obviously increased 3 days after operation(P<0.01),but WA,O,WA/C and O/C significantly decreased (P<0.01).Conclusion The cardiac functio of idiopathic PVC patients in the early stage may have been damaged,and RECA can reverse or delay the damaged cardiac function due to frequent PVC.

Objective To explore the effects of premature atrial contractions on hemodynamics combined with coronary heart disease and hypertension .Methods According to the advance rate ,62 patients with premature atrial contractions were invided into 3 groups :< 20% group(n= 18) ,20% - 40% group(n= 20) and > 40% group(n= 24) .All of the patients were performed imped‐ance cardiography .The hemodynamics indexes at different times were compared ,and the variation rates in hemodynamics of the three groups combined with basic diseases were analyzed .Results Stroke volume(SV) ,stroke index(SI) ,aortic compliance(AC) , stroke work(SW) ,stroke work index(SWI) ,and heather index(HI) were smallest when premature atrial contractions ,which were middle when the first sinus beats before premature atrial contractions ,and largest when the first sinus beats after premature atrial contractions(P< 0 .05) .The variation rates in hemodynamics were smallest in < 20% group ,which were middle in 20% - 40%group ,and largest in > 40% group(P< 0 .05) .The percentage of patients with basic heart diseases was lowest in < 20% group , which was middle in 20% - 40% group ,and highest in > 40% group(P< 0 .05) .Conclusion The advance rate is relatively large in patients with basic cardiovascular disease .Premature atrial contractions has certain effects on hemodynamics ,and the effects are positively correlated with advance rate .

Objective To investigate the relationship between coronary artery lesion and cardiac function in coronary atherosclerotic heart disease (CHD) patients.Methods Ninty cases of patients with CHD who were hospitalized for chest pain in Air Force PLA General Hospital and scheduled for coronary angiography were selected.Noninvasive hemodynamie testing was performed before coronary angiography.According to the results of coronary angiography,74 patients with coronary artery stenosis were selected as disease group,persons with an additional angiography showed no coronary artery stenosis and excluded from other systemic diseases in physical examination center(30 cases) were chosed as control group.According to the results of coronary angiography,the Gensini score system was used to quantify the degree of coronary artery disease,the patients were divided into two groups according to the score.:high score group (Gensini score＞ 20 points,40 cases) and low score group (Gensini score≤20).And the relationship between coronary artery stenosis and cardiac function was analyzed by comparing the two groups of noninvasive hemodynamics cardiac function indexes,BNP and LVEF values.Results The levels of C,SV,CO,CI,HI and LVEF in the disease group were significantly lower than those in the control group (P＜0.05),Q-B/B-X was significantly higher than that in the control group (P＜0.05);There were statistically significant of BNP and LVEF between Gensini high score and low score group (P＜0.05).The Pearson correlation analysis showed there was significantly negatively correlated between Gensini score and C,SV,CO,CI,HI,LVEF,and significantly positively correlated btween Gensini score and Q-B/B-X,BNP.Conclusion The degree of coronary artery lesion was negatively correlated with cardiac function,and the worse the disease,the worse the heart function.

Objective:To investigate the journals and research directions of SCI papers published by the first affiliated hospital of Sun Yat-sen university from 2007 to 2016. To further study the trend of published journals, as well as the relationship between the research directions and departments.Methods:According to the data from Institute of Scientific and Technical Information of China and the Web of Science, SCI papers of our hospital from 2007 to 2016 were searched and collected, detailed information on published journals and research directions of the papers were analyzed.Results:From 2007 to 2016, scientists of our hospital published 2 999 SCI papers in 897 kinds of journals in total, among which almost 60% papers were published in 166 kinds of journals. PLoS One published the largest number, counted as 125 papers. There were 16 kinds of journals with impact factor (IF)> 10, published 25 papers from 12 departments. A total number of 76 research directions were involved in all these papers, and the largest number of papers was in oncology, accounted for 10.3%. There were 1 647 papers in the top 10 research directions, accounted for 54.92%. Among the 76 research directions, 62 research directions involved more than 2 departments.Conclusions:The distribution of SCI journals published by the first affiliated hospital of Sun Yat-sen university is centralized, with few high-impact achievements. Interdisciplinary research is common and widespread, but the degree of concentration is not enough.

Objective:Through the analysis of the evaluation index system of the major rankings of universities and hospitals, this paper aims to provide a reference for the discipline construction of affiliated hospitals in universities.Methods:This paper comprehensively analyzes and compares the evaluation objectives and indicators of the five major rankings of universities and the three major rankings of hospitals in China and abroad.Results:Each main rankings have its own characteristics that both positive and with possible limitations.Conclusions:Hospital management departments can refer certain indicators in order to identify possible gaps of the hospital discipline development. Also, tailored corresponding measurements for discipline development can be developed in combination with real-needs.

Objective: To analyze the efficacy of recombinant activated factor Ⅶ a (rF Ⅶ a) on hematonosis with moderate or severe bleeding signs. Methods: Of total 16 cases with rF Ⅶ a treatment from May 2013 to May 2016, 8 cases received allogeneic hematopoietic stem cells transplantation (allo-HSCT) and the other were non-transplantation patients. In two groups, there was no significant difference on rF Ⅶ a usage and dosage. 15 patients with acute graft-versus-host disease (aGVHD) after allo-HSCT were control group (without rF Ⅶ a) . Results: ①The total response rate was 75.0% (6/8) in non-transplantation group and 37.5% (3/8) in transplantation group, respectively. Median interval for hemorrhage stop was 38.5 hours in non-transplantation group and 63.0 hours in transplantation group. The median overall survival (OS) was 201.0 and 29.0 days for non-transplantation group and transplantation group, respectively, and the OS rate was 50.0% (4/8) and 25.0% (2/8) , respectively. The bleeding-related mortality rate was 50.0% (2/4) and 83.3% (5/6) , respectively. ②Of the 16 cases, 9 showed response to rF Ⅶ a treatment and the other 7 cases’bleeding signs did not alleviate. The median OS was 268.0 in 9 cases with response and 24.0 days in 7 cases without response, respectively. ③In patients with intestinal aGVHD complicated with intestinal hemorrhage, the median OS of observation group (n=6) and control group (n=15) were 25.5 days and 20.0 days, respectively. Conclusion Patients with hematological diseases, especially patients after allo-HSCT, had high bleeding-related mortality, and rFⅦa therapy had a obvious hemostatic efficacy. The survival rate of patients with response was higher than that of cases without response. The causes of poor hemostasis efficacy of rF Ⅶ a therapy were associated with unsatisfactory control of complications in patients with intestinal bleeding after allo-HSCT.

Objective This paper aimed to discuss the construction strategy to promote research integrity in medical science from the perspective of hospital research administrators,and to provide theoretical basis for fulfilling the national strategic requirement of implementing "Scientific research integrity construction ".Methods Analyze and summarize the connotation,manifestations,causes and countermeasures of research integrity and research misconduct.Results The misconduct in medical scientific research occurred in various aspects,including scientific research projects,research papers,scientific achievements and other different stages.Behind reasons include weak sense of research integrity,lack of moral integrity education and training,improper academic evaluation system,lack of sound supervision,reward and punishment mechanism,etc.Conclusions A lot of strategies could adopted to promote the construction of research integrity and development of medical scientific research,for instance,strengthening scientific research integrity education,establishing a multi-dimensional evaluation system,improving the supervision,reward and punishment mechanism of scientific research integrity,as well as promote a better scientific research atmosphere.

Objective This article conducted the statistical analysis of SCI papers published during 2013-2017 at the first affiliated hospital of Sun Yat-sen university ,to understand the SCI paper outcomes as to provide reference for future policy making and research administration development .Methods We analyzed the SCI papers published by the First Affiliated Hos-pital of Sun Yat-sen University from 2013 to 2017 ."Article" and"Review" type SCI papers published by the hospital as the first completion unit were statistically analyzed from the aspects of quantity ,impact factors ,journals and discipline distribu-tion .Results A total of 2268 SCI papers were published in 5 years ,distributed in 1162 journals .The quantity and the average impact factor both increased year by year ,but mainly concentrated in traditional dominant disciplines .Conclusions The SCI papers were increasing annually since 2013 .However ,we still need to improve the quantity and quality of high-level articles ,to promote the development of disciplines ,to strengthen the construction of public experimental platforms ,to continue building talent teams ,to improve the reward and evaluation system ,and to further enhance the overall scientific research level of the hospital .

Chronic disease management is a challenging issue in China. To address the needs of talents and mature innovation ecosystem related to chronic disease management, The First Affiliated Hospital of Sun Yat-sen University(FAH-SYSU) actively responds to the national strategy to promote the high-quality development of the hospital through strengthening strategic planning, top-level design, and systematic consideration. Precise management of chronic diseases was taken as key measure for the construction of a national medical center. With continuous exploration in establishing talent pool, innovation center and application platform, and chronic disease management system that focuses on core elements of talent and innovation, the FAH-SYSU Model for the precise management of chronic diseases has been initially formed.

Objective:To explore the relationship between the long-term dynamic change in alanine aminotransferase(ALT) level and metabolic associated fatty liver disease(MAFLD).Methods:A retrospective study was conducted on 6 864 subjects who underwent four consecutive physical examinations from 2017 to 2020 in a cohort study of physical examination population in Henan Province. The relation between ALT level and the shift of MAFLD risk was analyzed using a multi-state Markov model, and the bidirectional relationship between ALT level and MAFLD was explored using a random intercept cross-lagged model.Results:Multi-state Markov model after adjusting for confounding factors showed that the risk of MAFLD in ALT Q2, Q3, Q4 group was gradually higher than that in Q1 group; Compared with health status, non-alcoholic fatty liver disease and MAFLD status gradually increased the risk of ALT shifting from normal to abnormal. The random intercept cross-lagged model after adjusting for confounding factors showed that there was a significant positive bidirectional relationship between MAFLD and ALT level. The cross-lag effect of MAFLD→ALT level was 0.083(95% CI 0.078-0.087), and the cross-lag effect of ALT→MAFLD was 0.044(95% CI 0.039-0.050). And with the extension of time, the cross-lag effect gradually decreased. Conclusions:There is a significant bidirectional relationship between the long-term dynamic change of ALT level and MAFLD. The occurrence of MAFLD is more likely to increase the risk of elevated ALT level, emphasizing the need for enhanced early prevention and treatment of MAFLD.