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The gold standard in determination of cardiac output is highly invasive and expensive in use. An accurate and reliable method, non-invasively and affordable, would improve hemodynamic management. This study is for validation of a new module in impedance cardiography to improve the accuracy in cardiac patients. Heart rate, Cardiac output/ index, and stroke volume have been determined simultaneously...
Coarctation of the Aorta (CoA) is one of the most serious congenital heart defects in newborns. Approximately 30% of cases of CoA associated with aortic arch hypoplasia (AAH). The end-to-side aortic anastomosis (ESAA) is an effective surgical procedure to be performed for correction of CoA with AAH. In this study, the approach of computational fluid dynamics (CFD) was used to investigate the hemodynamics...
Pulmonary artery banding (PAB) is a commonly used palliative procedure to restrict excess pulmonary blood in certain congenital heart diseases. However, many associated long-term hemodynamic problems still remain unsolved over the years. In this study, we utilized the method of computational fluid dynamics (CFD) to investigate the hemodynamic effects of PAB on patient-specific pulmonary flow before,...
Conduits available for right ventricular outflow tract (RVOT) reconstruction eventually become stenotic and/or insufficient due to calcification. To reduce the incidence of reoperations, using a bicuspid-valved polytetrafluoroethylene (PTFE) conduit for the RVOT reconstruction can be a viable alternative. The previous designs of this PTFE conduit performed well both in vitro and in clinical evaluations,...
To examine the effects of heart failure on beat-to beat arterial blood pressure (ABP) variability, four adult mongrel dogs (20-25 kg) were chronically instrumented for ventricular pacing and continuous measurements of central ABP and cardiac output (CO). Five minutes recordings with the dogs conscious and at rest took place after recovery from surgery (control) and after a 30 days long period of pacing...
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