Active clinical trials for "Heart and Blood Diseases"

This study investigated clinical parameters, laboratory data, imaging studies to evaluate patients with suspected pulmonary hypertension.

Multicentric, observational, retrospective registry including patients underwent ICD implantation for any indication. The primary aim of the registry is to evaluate the long-term outcome of patients receiving an ICD.

30 patients suffering from Heart Failure with Ejection Fraction less than 40% start Cardiac Rehabilitation Programme, serum KLOTHO Hormone level and other labs and Echo measurements will be taken on the first visit. After completion of 3-month Rehabilitation Programme the second set of labs and Echo measurements will be taken. Than participants will be divided for 2 groups: the patients who wish to continue Rehabilitation programme for additional 3-month period and the second group that prefer to stop Rehabilitation programme after completion of the first 3 month period. For both groups additional set of labs will be taken this time and at the end of the study. The Aim of the study: to investigate association between serum KLOTHO level, physical activity and possible correlation with laboratory and echocardiographic parameters in cohort of Heart Failure patients.

Intracranial atherosclerotic disease (ICAD) is an important cause of ischemic stroke. The occurrence of stroke caused by symptomatic ICAD is significantly different compared with asymptomatic ICAD (19% vs 3.5%), suggesting that plaque vulnerability may be responsible for the difference. Based on the previous high-resolution magnetic resonance vessel wall imaging (HR-MRI) results, the investigators hypothesis that the feature of intracranial plaque enhancement is an important imaging biomarker of plaque instability, which is closely related to stroke. The investigators will establish the ICAD cohort and use HR-MRI to investigate the composition, morphology and the enhancement pattern of symptomatic ICAD plaques. These findings will correlate with biochemical markers, and stroke recurrence, in order to explore: plaque characteristics and the enhancement features between symptomatic ICAD and asymptomatic ICAD the relationship between plaque enhancement and the composition of plaques; relationship among enhancement features of symptomatic ICAD plaques, biomarkers with different clinical significance, evolution of enhancement features of symptomatic ICAD plaques under intensive medical therapy. The investigators aim to explore the correlation between vulnerable plaque stratification and clinical outcomes, to explore the value of vascular responses in the pathogenicity of ICAD vulnerable plaques, as well as to provide objective basis for the establishment of the evaluation criteria of intracranial atherosclerotic vulnerable plaques.

Retrospective analysis of all patients receiving TAVI in the United Kingdom (UK). Stroke rates following TAVI are roughly 3%. There are several device and procedure related characteristics which may increase the risk of stroke. We will examine if there is a signal in the UK registry. This will be important is TAVI is to be extended down to lower risk patient cohorts.

STROKESTOP II will study if the biomarker NT-proBNP together with single-lead ECG can be used as a primary population screening tool for silent atrial fibrillation, and builds on previous results from the STROKESTOP study.

Human adipose tissue is now recognized as an acceptable, highly abundant source of adipose-derived regenerative cells (ADRCs). ADRCs are a heterogeneous or mixed population of cells found in adipose tissue including adult stem cells, leukocytes, connective tissue and vessel-associated cells. Autologous adult regenerative cells are thought to promote healing of scarred or injured tissue. While the investigators are learning more about the exact mechanisms every day, it is believed that this heterogeneous population of cells influences the local environment via cell-to-cell signaling, immune modulation, and differentiation into other cell types. The use of ADRCs in the treatment of many different medical conditions (including cardiovascular disease, soft tissue defects, wound healing, and many more) is being evaluated in numerous clinical and preclinical studies around the world. While there is a considerable amount of information regarding the cellular composition of ADRCs isolated from healthy donors, basically there is no much data regarding the ADRC composition from cardiac patients. In this study, adipose tissue or cells from chronic heart ischemia patients, that would otherwise be thrown away in waste, will be provided to researchers who will study these cells with the objective to characterize ADRCs derived from patients with a heart disease and to compare if a heart disease state does impact ADRC cell composition.

TAVI induced LBBB is a complication that occurs between 7 and 65 % of the cases, numbers that differ considerably between devices. There is an increased risk of progression to total AV-block at follow-up, with the risk of brady-arrhythmic death. The aim of the study is to elucidate the anatomical location of the conduction pathology of a TAVI induced LBBB. This could impact valve design and placement and thereby reduce the number of new LBBB induced by TAVI in the future. Furthermore, finding predictors for progression to a high degree AV block in the follow-up (and thus an indication for permanent pacemaker) could improve management of post-operative conduction abnormalities and prevent the risk of brady-arrhythmic death.

Atherosclerotic intracranial arterial（ICA） stenosis and intracranial aneurysms are the common causes of ischemic stroke and hemorrhagic stroke, respectively. Investigators aimed to assess the prevalence of cerebral aneurysms in patients with atherosclerotic intracranial arterial stenosis.

Turner syndrome is a congenital complete or partial lack one of the female sex chromosomes affecting 1 of 2000 live born girls. The syndrome is characterized by an increased prevalence of ischemic heart disease, aortic dilation and dissection, hypertension, stroke and autoimmune diseases in general. Our study aim is: Using MRI to further characterize and find risk factors leading to aortic dilation. Using MRI to assess the degree of aortic distensibility. Using Computed tomography x-ray scanning of the heart and coronary arteries to characterize the prevalence and degree of ischemic heart disease and coronary anomalies. Using pressure sensitive ultrasound (applanation tonometry) to assess the degree of aortic stiffness when compared to controls using end points as Pulse Wave Velocity, Augmentation Index and Central Pulse Pressure.