Active clinical trials for "Heart and Blood Diseases"

Patients with chest pain on exertion need a reliable non-invasive test to identify if they have inducible myocardial ischaemia. This would reduce the use of diagnostic coronary arteriography, avoid its risks and costs, and guide clinical decisions. Conventional stress echocardiography has poor reproducibility because it relies on qualitative and subjective interpretation. Quantitative approaches based on precise and reliable measurements of myocardial velocity, strain, strain rate and global longitudinal strain have been shown to be able to accurately diagnose myocardial ischaemia. A more accurate test using myocardial velocity imaging was not implemented by ultrasound vendors although it provided an objective measurement of myocardial functional reserve on a continuous scale from normality to severe ischaemia. The investigators propose an original approach to create a diagnostic software tool that can be used in routine clinical practice. The investigators will extract and compare quantitative data obtained through myocardial velocity imaging and speckle tracking in subjects who undergo dobutamine stress echocardiography. The data will be analysed using advanced computational mathematics including multiple kernel learning and joint statistics applied to multivariate data across multiple dimensions (including velocity, strain and strain rate traces). This approach will be validated against quantitative coronary arteriography and fractional flow reserve. The results will be displayed as parametric images and placed into a reporting tool. The output will determine the presence and severity of myocardial ischaemia. These new tools will have the capacity for iterative learning so that the precision of the diagnostic conclusions can be continuously refined.

The diagnosis of chronic thromboembolic pulmonary hypertension (CTEPH) is difficult for numerous reasons and is related with a poor prognosis. In Taiwan, the incidence of CTEPH and its clinical features are unknown. This study aims at evaluating the prevalence, clinical characteristics, and management of CTEPH in a Taiwanese cohort. Primary objective: - To investigate the geodemographics of CTEPH in Taiwan Secondary objectives: To characterize the demographics and clinical presentation of patients with CTEPH To describe the real-world management and treatment outcome of patients with CTEPH To identify the risk factors of CTEPH To assess the relationship between risk factors/patients' characteristics and clinical outcomes for CTEPH To evaluate the prognosis of CTEPH in Taiwan using survival assessment

CardoCHUVI registry was aim to study ischemic and bleeding complication after an acute coronary syndrome (ACS), both in-hospital and follow-up events.

This registry started January 1,2018 to collect patients who diagnosed as De Winter Symdrome for the first time in Hainan General Hospital.All enrolled patients will receive 30 days followed-up.

The purpose of this study is to investigate the potential association of coronary artery geometry, based on coronary CT angiography (CCTA), with the complexity and the severity of coronary atherosclerosis.

Pulmonary vascular disease and cardiac performance in extreme preterm infants: A prospective cross-sectional study

The purpose of the study is to evaluate the value of biomarkers in the diagnosis and risk stratification of patients with suspected pulmonary embolism.

This is a 12 week, randomized controlled trial. There are 2 arms and 20 patients with non healing diabetic foot ulcer allocated in each arm. One arm receives i:X guided treatment and the other arm receives standard of care treatment. Our primary objective is to compare the wound area reduction in both arms.

Recovery of the left ventricular function is variable from one patient to another, thus assessment of cardiac function by measuring left ventricular ejection fraction using echocardiography is the most common in the daily clinical practice. However, this technique has limitation related with its intra- and interobserver variability. A recent technique, 2D speckle tracking for assessing global longitudinal strain, has been introduced to reduce the variability and potentially has a higher accuracy. Speckle tracking is a method which uses two dimensions recording for measuring quantity of movement of myocardium in several segments. Speckle-tracking echocardiography is a current noninvasive ultrasound imaging technique that allows for an objective and quantitative evaluation of global and regional myocardial function independently from the angle of insonation and from cardiac translational movements,

To identify biomarkers of common eye diseases based on single-cell sequencing technologies using PBMC samples. These diseases include uveitis, diabetic retinopathy, age-related macular degeneration and polypoid choroidal vasculopathy. Our study may provide new insight into the underlying mechanisms, and reveal novel predictors and intervention targets for the diagnosis, prognosis and treatment of these diseases.