Prevalence and correlates of valvular heart diseases in the elderly population in Hubei, China

Primary regional disparities in clinical characteristics, treatments, and outcomes of a typically designed study of valvular heart disease at 46 tertiary hospitals in China: Insights from the China-VHD Study

BACKGROUND

Valvular heart disease (VHD) has become increasingly common with the aging in China. This study aimed to evaluate regional differences in the clinical features, management strategies, and outcomes of patients with VHD across different regions in China.

METHODS

Data were collected from the China-VHD Study. From April 2018 to June 2018, 12,347 patients who presented with moderate or severe native VHD with a median of 2 years of follow-up from 46 centers at certified tertiary hospitals across 31 provinces, autonomous regions, and municipalities in Chinese mainland were included in this study. According to the locations of the research centers, patients were divided into five regional groups: eastern, southern, western, northern, and central China. The clinical features of VHD patients were compared among the five geographical regions. The primary outcome was all-cause mortality or rehospitalization for heart failure. Kaplan-Meier survival analysis was used to compare the cumulative incidence rate.

RESULTS

Among the enrolled patients (mean age, 61.96 years; 6877 [55.70%] male), multiple VHD was the most frequent type (4042, 32.74%), which was mainly found in eastern China, followed by isolated mitral regurgitation (3044, 24.65%), which was mainly found in northern China. The etiology of VHD varied significantly across different regions of China. The overall rate of valve interventions was 32.67% (4008/12,268), with the highest rate in southern China at 48.46% (205/423). In terms of procedure, the proportion of transcatheter valve intervention was relatively low compared to that of surgical treatment. Patients with VHD in western China had the highest incidence of all-cause mortality or rehospitalization for heart failure. Valve intervention significantly improved the outcome of patients with VHD in all five regions (all P  <0.05).

CONCLUSIONS

This study revealed that patients with VHD in China are characterized by significant geographic disparities in clinical features, treatment, and clinical outcomes. Targeted efforts are needed to improve the management and prognosis of patients with VHD in China according to differences in geographical characteristics.

REGISTRATION

ClinicalTrials.gov , NCT03484806.

Transcatheter aortic valve implantation for severe aortic regurgitation using the J-Valve system: A midterm follow-up study

BACKGROUND

Transcatheter aortic valve implantation (TAVI) is a well-established intervention for severe aortic valve stenosis. However, its application for severe aortic regurgitation (AR) is still under evaluation. This study aims to present the 3-year follow-up outcomes of the J-Valve system in managing severe AR.

AIMS

The aim of this study was to evaluate the mid-term efficacy and durability of the J-Valve system in the treatment of severe AR and to provide new information on this intervention.

METHODS

In this retrospective, single-center study, we evaluated the prognostic outcomes of patients with AR, who underwent treatment with the J-Valve system at Nanjing Drum Tower Hospital. Consecutive patients who were treated with the J-Valve were included in the analysis. The study focused on the echocardiographic follow-up to assess the effectiveness and durability of the J-Valve system in managing AR.

RESULTS

From January 2018 to December 2022, 36 high-risk AR patients treated with the J-Valve system had a procedural success rate of 97.2%, with one case requiring open-heart surgery due to valve displacement. Significant improvements were observed in left ventricular diameter (from 63.50 [58.75-69.50] mm to 56.50 [53.00-60.50] mm, p < 0.001) and left atrial diameter (from 44.00 [40.00-45.25] mm to 39.00 [36.75-41.00] mm, p = 0.003) postsurgery. All patients completed the 1-year follow-up, with an overall mortality rate of 2 out of 36 (5.6%). Among the surviving patients, there was one case of III° atrioventricular block and one case of stroke, both occurring within 90 days postsurgery. After a 3-year follow-up, 15.0% of patients had mild or moderate valvular regurgitation, with no cases of moderate or severe paravalvular leak. Additionally, 89.5% of patients were classified as New York Heart Association class I or II, showing significantly enhanced cardiac function.

CONCLUSION

The J-Valve system has shown positive therapeutic outcomes in treating AR, with notable effectiveness in managing the condition and significant improvements in heart failure symptoms and cardiac remodeling. However, due to the limited sample size and partial follow-up data, it is important to emphasize the need for further research with comprehensive long-term follow-up, to fully validate these results.

Transcatheter aortic valve replacement in China - a review of the available evidence

This paper discusses aortic stenosis (AS) in China, emphasising the role of transcatheter aortic valve replacement (TAVR) in treating AS in an ageing population. AS characteristics, its treatment and the clinical outcomes of transfemoral TAVR in Chinese patients are described via a systematic review. AS affects >1% of the Chinese population aged ≥65 years, with degenerative AS predominating over rheumatic AS among this age group. Chinese patients often have high aortic valve (AV) calcification with bicuspid AV morphology. In 2021, 38,000 surgical aortic valve replacements (SAVR) were reported in China, while the number of TAVR increased from 293 in 2017 to 7,357 in 2021. There are four self-expanding valves and one balloon-expandable SAPIEN 3 valve available in China. Among them, the Venus A-Valve is the most studied and widely used, whereas limited data are available for VitaFlow, TaurusOne, and SAPIEN 3. Notably, 10.0-16.5% of Venus A-Valve recipients and 0.2% of SAPIEN 3 recipients required multiple valve implantations. The rates of 30-day paravalvular leakage were 0-11.7%/0% for Venus A-Valve, 2.0%/0% for VitaFlow, and 0%/0% for SAPIEN 3, for moderate and severe leakage, respectively. Thirty-day all-cause mortality rates were 3.7-10.0% for Venus A-Valve, 0.9% for VitaFlow, and 0-3.2% for SAPIEN 3. One-year all-cause mortality rates were 5.9-13.6% for Venus A-Valve, 0-4.5% for VitaFlow, 6.7% for TaurusOne, and 6.2% for SAPIEN 3. The Venus A-Valve indicated lower 30-day permanent pacemaker implantation (PPI) rates (7.4-20.5%) than VitaFlow and TaurusOne. Outcomes for patients with bicuspid or tricuspid aortic valves were similar. AS is rising among the elderly Chinese population; SAVR is common, and TAVR is increasing. Limited device comparisons exist, but the Venus A-Valve seems to have lower PPI rates, and SAPIEN 3 has low 30-day mortality in China.

New Approaches to Assessment and Management of Tricuspid Regurgitation Before Intervention

Severe tricuspid regurgitation (TR) is a progressive condition associated with substantial morbidity, poor quality of life, and increased mortality. Patients with TR commonly have coexisting conditions including congestive heart failure, pulmonary hypertension, chronic lung disease, atrial fibrillation, and cardiovascular implantable electronic devices, which can increase the complexity of medical and surgical TR management. As such, the optimal timing of referral for isolated tricuspid valve (TV) intervention is undefined, and TV surgery has been associated with elevated risk of morbidity and mortality. More recently, an unprecedented growth in TR treatment options, namely the development of a wide range of transcatheter TV interventions (TTVI) is stimulating increased interest and referral for TV intervention across the entire medical community. However, there are no stepwise algorithms for the optimal management of symptomatic severe TR before TTVI. This article reviews the contemporary assessment and management of TR with addition of a medical framework to optimize TR before referral for TTVI.

Hybrid approach in patients with aortic valve disease and concomitant coronary heart disease: retrospective study

OBJECTIVE

Aim: The aim of the study was to analyze the effectiveness of the hybrid approach, which involves the combination of aortic valve replacement (AVR) with percutaneous coronary intervention (PCI), in patients with CHD and aortic valve disease..

PATIENTS AND METHODS

Materials and Methods: For this study, analysis of medical records of adult patients (over 18 years old) who underwent AVR along with myocardial revascularization at the State Institution "Heart Institute Ministry of Health of Ukraine" in the period from 2018 to 2022 was carried out. Quality of life was assessed in 6 and 12 months after AVR with myocardial revascularization using Short Form 36 Survey (SF-36).

RESULTS

Results: We selected 130 patients who underwent AVR together with myocardial revascularization (first group (n=51) - a combination of AVR and percutaneous coronary interventions (PCI); second group (n=79) - a combination of AVR and coronary artery bypass grafting (CABG). The duration of cardiopulmonary bypass and aorta cross clamping in first group was recorded by 1.5 times and by 1.4 times significantly lower compared to the second group (p=0.0001). The pain index after 6 months according to the SF-36 questionnaire was found to be 13.5% (p=0.017) significantly higher in patients of the first group compared to the second group, while other indicators did not differ among groups.

CONCLUSION

Conclusions: Patients with the hybrid approach of treatment were characterized by a similar level of postoperative complications with the surgical group. At the same time, this cohort of patients had a better SF-36 pain index in 6 months after the hybrid intervention.

Prevalence and Risk Factors of Mitral, Tricuspid, and Aortic Regurgitation: A Population-Based Study from Rural Northeast China

The population-based studies on the epidemiologic features of valvular regurgitation in Northeast China are scarce. We aim to estimate the prevalence and risk factors of mitral regurgitation (MR), tricuspid regurgitation (TR), and aortic regurgitation (AR) in a general population from rural Northeast China. Valvular regurgitation was assessed by color flow Doppler echocardiography in a population-based survey of 11,278 participants aged ≥35 years in rural areas of Liaoning Province during 2012 to 2013. The prevalence of mild or greater MR and TR were 1.6% and 1.5%, respectively. Trace or greater AR was present in 4.1% of the participants. In the multivariable regression model, older age, left atrial dimension, low left ventricular (LV) ejection fraction, and fasting plasma glucose were associated with higher risk of MR in men, whereas only older age and left atrial dimension increased the risk in women. Body mass index was found to be a protective factor for MR in women (odds ratio 0.847, 95% confidence interval 0.741 to 0.969). TR was independently associated with age, heart rate, low LV ejection fraction, current drinking status, and high-density lipoprotein cholesterol. The risk for AR significantly increased with age in both genders. LV mass index and aortic dimension increased the risk of AR in males, and females with higher LV mass index and high-density lipoprotein cholesterol had an increased risk for AR. In both genders, systolic blood pressure presented as a risk factor for AR, while diastolic blood pressure as a protective factor. In this large Chinese population-based study, we found remarkably low prevalence of valvular regurgitation, adding evidence for estimating disease burden and making policy strategies in Northeast China.

Lifestyle patterns, genetic susceptibility, and risk of valvular heart disease: a prospective cohort study based on the UK Biobank

AIMS

Genetic and lifestyle factors are both major contributors to valvular heart disease (VHD). However, it is still uncertain whether genetic susceptibility alters the association between lifestyle and VHD. We aimed to investigate the association between lifestyle and VHD in different genetic risk backgrounds.

METHODS AND RESULTS

A prospective cohort study was carried out on 499 341 participants without VHD at baseline. The assessment of lifestyle included smoking, alcohol consumption, diet, activity, and sleep. Genetic susceptibility was separately measured by polygenic risk scores (PRSs) and family history of cardiovascular disease (CVD). Cox regression models were used to estimate hazard ratios (HRs) and 95% confidence intervals (95%CIs) between lifestyle and VHD, as well as aortic stenosis (AS). During a median follow-up of 10.8 years, 12 983 incident VHD cases were diagnosed (incidence rate 2.46 per 1000 person-years), including 3527 AS cases (incidence rate 0.66 per 1000 person-years). The risk of VHD and AS decreased with healthier lifestyles (P value for trend <0.001). Compared to individuals with a unhealthy lifestyle, the HRs of VHD in intermediate and healthy lifestyle groups were 0.81 (0.76-0.86) and 0.81 (0.76-0.87). The negative association between healthy lifestyle and VHD events was independent of genetic risk (P for interaction between healthy lifestyle scores and PRSs/family history of CVD was 0.723/0.763). Similar findings were obtained in analyses of AS, and a stronger negative association was found.

CONCLUSION

Our study reveals that adherence to a healthy lifestyle is significantly associated with a reduced risk of VHD especially AS, irrespective of genetic susceptibility.

SUMMARY

Based on a cohort of around 490 000 participants, the study investigated the association between lifestyle and VHD under different stratifications of genetic risk. The study found that a healthy lifestyle was associated with a lower risk of VHD, particularly AS, independent of genetic risk. Our findings suggest that advance interventions for lifestyle may be an effective way to reduce the global burden of VHD.

Development of a nomogram for predicting nosocomial infections among patients after cardiac valve replacement surgery

AIMS AND OBJECTIVES

To construct a predictive nomogram of the risk of nosocomial infections among patients after cardiac valve replacement surgery.

BACKGROUND

Nosocomial infections are a standout challenge that worsens the prognosis of patients after valve replacement surgery. However, studies on the nomogram of nosocomial infections in these patients have remained scarce.

DESIGN

A retrospective cohort study.

METHODS

Patients (n = 720) following valve replacement surgery from 2018 to 2019 were selected. LASSO regression and multivariate logistic regression were utilised to ascertain predictors of nosocomial infections. The predictive performance of the nomogram was appraised by calibration and discrimination. Decision and impact curves were used to assess the clinical utility. Internal validation was implemented via 1000 bootstrap samples to mitigate overfitting. TRIPOD guidelines were used in this study.

RESULTS

One hundred and fifty one patients (20.97%) experienced nosocomial infections following valve replacement surgery. Heart failure, preoperative anaemia, valve material, American Society of Anesthesiologists score ≥ IV, prolonged duration of surgery, duration of mechanical ventilation ≥ 24 h and indwelling nasogastric tube were predictors of nosocomial infections. Using these variables, we developed a predictive nomogram of the occurrence of nosocomial infections and the internal validation results demonstrated good discrimination and calibration of the nomogram. The clinical decision and impact curve revealed significant clinical utility.

CONCLUSIONS

The present study constructed a nomogram for predicting the risk of nosocomial infections in patients following cardiac valve replacement surgery. This nomogram may strengthen the effective screening of patients at high risk of nosocomial infections.

RELEVANCE TO CLINICAL PRACTICE

This risk warning tool can assist clinical staff in making decisions and providing individualised infection control measures for patients, which has a significant reference value for clinical practice.

NO PATIENT OR PUBLIC CONTRIBUTION

The data for this study were obtained from the hospital database, and the entire process of the study did not involve patient participation.

Global burden of calcific aortic valve disease and attributable risk factors from 1990 to 2019

Background

Calcific aortic valve disease (CAVD) was highly prevalent among developed countries and caused numerous deaths. Based on the Global Burden of Disease 2019, this study was designed to present comprehensive epidemiological information, attributable risks, and relevant factors.

Methods

All data were available online via the Global Health Data Exchange (GHDx). In this study, we analyzed the global incidence, prevalence, deaths, and disability-adjusted life years (DALYs) of CAVD across different regions from 1990 to 2019. We applied the estimated annual percentage changes (EAPCs) to evaluate the change trends and their attributable risks. In addition, we explored several relevant factors.

Results

From 1990 to 2019, the incidence cases, prevalence cases, CAVD-related deaths, and DALYs of CAVD gradually increased globally. However, the age-standardized death rate (ASDR) was relatively stable, and the age-standardized DALYs rate gradually declined during the past 30 years. Males and elderly individuals were more likely to suffer from CAVD. High systolic blood pressure (SBP) was the predominant attributable risk of disease burden that presented a global downward trend (death: EAPC = -0.68, 95% CI -0.77~-0.59, P < 0.001; DALYs: EAPC = -0.99, 95% CI -1.09 to -0.89, P < 0.001). Alcohol consumption (R = 0.79, P < 0.001), smoking prevalence (R = 0.75, P < 0.001), and calcium (R = 0.72, P < 0.001) showed a positive correlation with the age-standardized incidence rate (ASIR), whereas classic monsoon region (R = -0.68, P < 0.001) and mean temperature (R = -0.7, P < 0.001) showed a negative correlation with age-standardized incidence rate (ASIR). Besides, medical and healthcare resources presented a positive correlation with ASIR. Meanwhile, similar relationships were found in age-standardized prevalence rate (ASPR), ASDR, and age-standardized DALY rate (ASDALYR).

Conclusion

CAVD displays widely varied spatial distribution around the world, of which high SDI regions have the highest burdens. Age is a powerful factor and hypertension a predominant attributable risk factor. Moreover, controlling blood pressure, avoiding smoking, reducing alcohol consumption, and so on, could effectively reduce the burden of CAVD.

Valvular Heart Disease Epidemiology

Valvular heart disease is a rapidly growing cause of global cardiovascular morbidity and mortality with diverse and evolving geographic distribution. The prevalence of rheumatic heart disease, the most common valvular heart disease (affecting approximately 41 million people), has been rising in developing nations, likely due to the expansion of the young adult population and the decrease in premature mortality that has resulted from improved access to antibiotics, microbiological testing, and echocardiography. Rheumatic heart disease has also been rising among the impoverished and, often, indigenous populations of developed nations, spurring public health initiatives that are aimed at alleviating healthcare disparities. Aortic valve stenotic disease is the most commonly occurring valvular pathology in developed nations (afflicting 9 million people worldwide) and its prevalence has been increasing with population aging and the increased prevalence of atherosclerosis. Aortic regurgitation is associated with diastolic, but not systolic, hypertension and it has likewise seen a rise in the developed world. Mitral regurgitation affects 24 million people worldwide, with great variability between and among nations. Primary mitral regurgitation arises as a consequence of myxomatous degeneration and mitral valve prolapse, which is largely due to genetic predispositions, while secondary mitral regurgitation accounts for 65% of cases and arises secondary to dilation and heart failure. Tricuspid regurgitation has become more prevalent in developed nations due to the increased usage of intracardiac pacemakers. Infective endocarditis prevalence has also grown in developed nations, likely due to population aging and the increased utilization of transcatheter valve replacement and prosthetic valves as interventions against the previously discussed valvular pathologies.

Global epidemiology of valvular heart disease

Valvular heart disease (VHD) is a major contributor to loss of physical function, quality of life and longevity. The epidemiology of VHD varies substantially around the world, with a predominance of functional and degenerative disease in high-income countries, and a predominance of rheumatic heart disease in low-income and middle-income countries. Reflecting this distribution, rheumatic heart disease remains by far the most common manifestation of VHD worldwide and affects approximately 41 million people. By contrast, the prevalence of calcific aortic stenosis and degenerative mitral valve disease is 9 and 24 million people, respectively. Despite a reduction in global mortality related to rheumatic heart disease since 1900, the death rate has remained fairly static since 2000. Meanwhile, deaths from calcific aortic stenosis have continued to rise in the past 20 years. Epidemiological data on other important acquired and congenital forms of VHD are limited. An ageing population and advances in therapies make an examination of the changing global epidemiology of VHD crucial for advances in clinical practice and formulation of health policy. In this Review, we discuss the global burden of VHD, geographical variation in the presentation and clinical management, and temporal trends in disease burden.

Characteristics, interventions and outcomes of patients with valvular heart disease hospitalised in China: a cross-sectional study

OBJECTIVES

Little is known about contemporary characteristics and management of valvular heart disease (VHD) in China. This study aimed to examine the clinical characteristics, aetiology and type of VHD, interventions and in-hospital outcomes of patients with VHD hospitalised in China.

METHODS

We used a two-stage random sampling design to create a nationally representative sample of patients with VHD hospitalised in 2015 in China and included adult patients with mild, moderate or severe VHD. We abstracted data from medical records, including echocardiogram reports, on patient characteristics, aetiology, type and severity of VHD, interventions and in-hospital outcomes. We weighted our findings to estimate nationally representative hospitalisations. We performed multivariable logistic regression analysis to identify factors associated with valve intervention.

RESULTS

In 2015, 38 841 patients with VHD were hospitalised in 188 randomly sampled hospitals, representing 662 384 inpatients with VHD in China. We sampled 9363 patients, mean age 68.7 years (95% CI 42.2 to 95.2) and 46.8% (95% CI 45.8% to 47.8%) male, with an echocardiogram. Degenerative origin was the predominant aetiology overall (33.3%, 95% CI 32.3% to 34.3%), while rheumatic origin was the most frequent aetiology among patients with VHD as the primary diagnosis (37.4%, 95% CI 35.9% to 38.8%). Rheumatic origin was also the most common aetiology among patients with moderate or severe VHD (27.3%, 95% CI 25.6% to 29.0% and 33.6%, 95% CI 31.9% to 35.2%, respectively). The most common VHD was mitral regurgitation (79.1%, 95% CI 78.2% to 79.9%), followed by tricuspid regurgitation (77.4%, 95% CI 76.5% to 78.2%). Among patients with a primary diagnosis of severe VHD who were admitted to facilities capable of valve intervention, 35.6% (95% CI 33.1% to 38.1%) underwent valve intervention during the hospitalisation. The likelihood of intervention decreased significantly among patients with higher operative risk.

CONCLUSIONS

Among patients with VHD hospitalised in China, the predominant aetiology was degenerative in origin; among patients with moderate or severe VHD, rheumatic origin was the most common aetiology. Targeted strategies and policies should be promoted to address degenerative VHD. Patients with severe VHD may be undertreated, particularly those with high operative risk.

Associations between aortic regurgitation severity and risk of incident myocardial infarction and stroke among patients with degenerative aortic valve disease: insights from a large Chinese population-based cohort study

OBJECTIVES

Few studies have explored whether the risk of myocardial infarction (MI) or stroke varies among patients with degenerative aortic valve disease (DAVD) with different severity of aortic regurgitation (AR) or not. Thus, a prospective study was conducted to elucidate the causal relationship between AR severity and risk of incident MI and stroke among patients with DAVD recruited from a general population in Northeast China.

DESIGN

Prospective cohort study.

SETTING

Community-based study carried out in rural areas of Northeast China.

METHODS

There were 3675 patients with DAVD aged ≥45 years eligible for the prospective study. During a median follow-up time of 4.64 years, 99 participants lost to follow-up. Cox regression analyses were used to investigate the association between baseline AR severity and the risk of incident MI or stroke.

RESULTS

In the final cohort of 3576 patients with DAVD, there were 3153 patients without AR (88.2%), 386 patients with mild AR (10.8%) and 37 patients with moderate or severe AR (1.0%). Multivariate analyses showed that, compared with participants without AR, those with moderate/severe AR were associated with 8.33 and 6.22-fold increased risk of MI and MI mortality, respectively. However, no significant associations between AR and the risk of stroke or stroke mortality were observed.

CONCLUSIONS

As compared with no AR, moderate/severe AR but not mild AR was an independent predictor for the risk of MI and MI mortality. AR was not significantly associated with stroke or stroke mortality, irrespective of AR severity. Secondary prevention strategies should be taken to delay the progression of DAVD and thus reduce the incidence of MI.

Current status and etiology of valvular heart disease in China: a population-based survey

BACKGROUND

The epidemiology of valvular heart disease (VHD) has changed markedly over the last 50 years worldwide, and the prevalence and features of VHD in China are unknown. The objective of this study was to investigate the current status and etiology of VHD in China.

METHODS

We used a cross-sectional national survey with stratified multistage random sampling from the general Chinese population to estimate the VHD burden. Data on demographic characteristics, medical history, physical examination, blood tests, and potential etiology were collected. Echocardiography was used to detect VHD.

RESULTS

The national survey enrolled 34,994 people aged 35 years or older across China. Overall, 31,499 people were included in the final analysis, and 1309 participants were diagnosed with VHD. The weighted prevalence was 3.8%, with an estimated 25 million patients in China. The prevalence of VHD increased with age and was higher in participants with hypertension or chronic kidney disease than in their counterparts. Among participants with VHD, 55.1% were rheumatic and 21.3% were degenerative. The proportion of rheumatic decreased with age, and the proportion of degenerative rose with age. However, the prevalence of rheumatic disease was still higher in the elderly population than in the younger population. Logistic regression revealed that age and hypertension were correlated with VHD.

CONCLUSIONS

In China, rheumatic heart disease was still the major cause of the VHD, with a significant increase in degenerative heart disease. Age and hypertension are important and easily identifiable markers of VHD.

Development and trend in the field of valvular heart disease in China: an analysis based on the National Natural Science Foundation of China

Background

National Natural Science Foundation of China (NSFC) plays a vital role promoting advancement of science in China. The incidence and mortality rate of valvular heart disease (VHD) increase with aging population. Therefore, it is of significance to discuss the development and trend in the field of VHD and provide references for scholars to carry out further Foundations.

Methods

Internet-based Science Information System and other websites were used to search for projects supported by NSFC related to VHD in 2008–2019 and related information of applicants. Publications, citations and impact factors were queried by Google Scholar and InCites Journal Citation Reports 2.0 and analyzed by SPSS for Windows version 24.0. Key words extracted from these project titles were imported into Citespace for analysis.

Results

A total of 117 projects and related information were acquired. Although the annual amount of projects and funding has fluctuated in recent years, they still maintained an upward trend. Institutes were mainly distributed over Hubei Province, Shanghai and Jiangsu Province. Applicants characterized as senior title, male, cardiac surgeon have accounted for a larger proportion of projects, with a greater amount of funding. Through the analysis of keywords and subject distribution, molecular-biology-based mechanism study combined with tissue engineering has become the principal research hot spot and trend in recent years. Annual changes in output in scientific research were consistent with changes in the amount of funding.

Conclusions

This paper collated funding situation supported by NSFC in VHD, analyzed distribution of keywords and summarized the research trend, so as to supply guidance to researchers for advanced researches.

Coronary artery disease is associated with valvular heart disease, but could it Be a predictive factor?

OBJECTIVE

This study was conducted to evaluate the prevalence of significant coronary artery disease (CAD) in patients with severe valvular heart disease (VHD) and the association between these two cardiac entities. Our research aims to introduce the theory of a possible causal relationship.

METHODS

A retrospective study was conducted on 1308 consecutive patients who underwent surgery for severe VHD in the cardiovascular department of Notre-Dame de Secours University Hospital (NDSUH) between December 2000 and December 2016. According to transthoracic echocardiography, patients were divided into 4 groups: patients with severe aortic stenosis (AS), patients with severe aortic regurgitation (AR), patients with severe mitral stenosis (MS), and patients with severe mitral regurgitation (MR). Preoperative coronary angiographies were reviewed for the presence or the absence of significant CAD (≥50% luminal stenosis). Chi-square test and 2 × 2 tables were used.

RESULTS

Of the 1308 patients with severe VHD, 1002 patients had isolated aortic valve disease, 240 patients had isolated mitral valve disease, and 66 patients had combined aortomitral valve disease. CAD was detected in 27.75% of all patients with severe VHD, in 32% of patients with isolated aortic valve disease, and in 15% of patients with isolated mitral valve disease. Statistical analysis showed a higher prevalence in patients with severe aortic valve stenosis and a significant relationship between CAD and aortic valve disease, mainly severe AS (p < 0.0001).

CONCLUSION

The prevalence of CAD in patients with VHD is 27.75%, and it correlates significantly with aortic valve disease, in particular with severe AS. Future large studies are needed to evaluate the possible causal relationship.

Prevalence of valvular heart diseases and associated risk factors in Han, Uygur and Kazak population in Xinjiang, China

Background

Valvular heart diseases (VHD) is very common in clinical practice and has became the subject of growing attention in the field of cardiovascular medicine. Our aim was to assess the prevalence and correlates of VHD in the general population in Xinjiang, China.

Methods

Using a 4-stage stratified cluster random sampling method, a total of 14618 participants were recruited in the Cardiovascular Risk Survey (CRS) study. The participants’ personal information, medical history were assessed by questionnaire. VHD was diagnosed by transthoracic echocardiography. We carried out the statistical analysis utilizing SPSS Statistics version 19.0.

Results

In the total study group, VHD was observed in 1397 (9.65%) individuals. The prevalence rates of VHD in Han, Uygur and Kazak group are 13.51%, 2.71% and 12.29% respectively. The prevalence rates of VHD increased strikingly with age (all P < 0.001). The results of multinomial regression analysis indicated that VHD were related to age in Han group, to age smoking and hypertension in Uygur group, to age and hypertension in Kazak group.

Conclusion

Our research provides a unique prevalence rate of VHD in Xinjiang natural population. The result suggests that VHD are notably common in this population (9.65%) and increase with age. There exists significant difference of prevalence rate between ethnics. The main risk factors of VHD are age, hypertension and smoking. Valvular heart diseases should be regarded as a serious and growing public-health problem.