Active clinical trials for "Heart Valve Diseases"

With the aging of Chinese population, degenerative valvular disease is becoming more and more frequent, which has brought a heavy burden to our society. Taking aortic stenosis (AS) as an example, the incidence of AS in population over the age of 65 are about 2%, and in population above the age of 85 can be amounted to 4-8%, in the Western country. Since the invention of transcatheter aortic valve replacement (TAVR),aortic valve disease (AVD),including AS and aortic regurgitation (AR), has attracted more and more attention. To date, there are few data about the prevalence of AVD in China. The characteristics and prognosis of AVD in China are still unknown. Therefore, the investigators design a prospective, observational cohort study to investigate characteristics, treatments and prognosis of AVD in Chinese elderly population. The results of the study will provide a basis for the future national health policy for prevention and treatment of AVD in the elderly.

Prospective Cohort Study aims at elaborating the outcomes of the Tricuspid Reconstruction of Aortic valve leaflets using autologous pericardium (Ozaki procedure) in the adult and paediatric patients. A very promising technique with the potential benefits of dodging oral anticoagulation, foreign material, and suitable for patients with small aortic annuli and in infectious endocarditis. Performing hemodynamic evaluation, assess the clinical implementation and report preliminary results at follow up .

Sleep-disordered breathing has a prevalence of 30~80% in patients with heart diseases. Various studies have revealed a correlation between the incidence and various diseases such as heart failure, hypertension, diabetes, and cerebral infarction. Postoperative acute kidney injury after heart surgery is one of the major complications with incidence with 40~50%, however, there has been no preventive method or treatment yet. Recently, several studies have been published that have shown a correlation between sleep-disordered breathing and renal impairment. In general, sleep-disordered breathing can be regulated easily with continues positive expiratory pressure, which means that early diagnosis and treatment of sleep-disordered breathing might help to reduce the incidence of postoperative acute kidney injury and improve patients' prognosis. In this study, the investigators investigate the impact of sleep-disordered breathing (diagnosed by oxygen desaturation index ≥5) on the incidence of postoperative acute kidney injury in patients undergoing valvular heart surgery.

Following the high feasibility of analyses by core laboratory with videodensitometry determined in the ASSESS-REGURGE Registry, this is an early clinical feasibility study of online videodensitometric assessment of aortograms to quantitate aortic regurgitation (AR) in the cath lab, specifically in the setting of transcatheter aortic valve replacement (TAVR)

Patient with coronary artery disease (CAD), heart failure and abnormal heart function undergoing major vascular surgery have a high associated high morbidity and mortality with myocardial infarction accounting for 33-50% of perioperative deaths. The prevalence of CAD in vascular surgery patients approaches 50%. Proper pre-procedure protocols to accurately assess patients and determine who may require further medical optimization prior to undergoing surgery help mitigate risk and improve outcomes. The investigators designed this study as a single center, retrospective cohort analysis to explore the association between ventricular (LV and RV function) and valvular (Aortic / Mitral / Tricuspid) function and expanded major adverse cardiac events (X-MACE).

Currently there is an increase in the use of bioprosthesis worldwide (> 70% according to national data of the Spanish Society of Thoracic and Cardiovascular Surgery). There is conflicting evidence regarding the long-term survival of patients aged 50-65 years with mechanical (M) or biological (B) aortic prostheses. General consensus of greater complications associated with the use of long-life anticoagulation in M and of reoperation in B. Similar survival with lower MACCE complications in bioprosthesis could reconsider their choice in patients aged 50-65 years, specially in the current TAVI era. The investigators are going to perform a multicentric retrospective observational study (Registry) about 15 year-outcomes Following Bioprosthetic vs Mechanical Isolated Aortic Valve Replacement for Aortic Stenosis in Patients Aged 50 to 65 Years in 30 Cardiovascular Surgery Centers in Spain

Title: Clinical study of the relationship between Pharmacogenomics and warfarin dose in Chinese patients Drug: Warfarin Design: To value the accuracy of warfarin Pharmacogenomics algorithm by the algorithm calculated dose and actual dose in the Chinese patients. Hypothesis:Pharmacogenomic algorithm guided dose can help to predict warfarin dose in Chinese patients.

Our main hypothesis on the present study is that new parameters such as risk-taking behavior, patients motivation, health related quality of life, new biomarkers and more precise echocardiography measures in addition to traditional parameters will improve pre-operative risk assessment in patients with AS and better guide patients and doctors in decision whether to operate or not.

The purpose of this observational, exploratory study in patients undergoing any cardiac valve replacement or repair is to assess the rate of bacterial colonization over native degenerative calcified cardiac valves.

It is unclear to what extent systemic fluid overload has an impact on T1-mapping results by cardiovascular mangetic resonance imaging. In this study, patients will undergo body composition monitoring assessing systemic fluid overload and T1-mapping using MOLLI by cardiovacular magnetic resonance imaging in order to investigate a possible association with each other.