نتایج جستجو برای: myocardial mechanical parameters
تعداد نتایج: 944133 فیلتر نتایج به سال:
It is widely accepted that improved perfusion of viable myocardium preserves cardiac function and conveys longterm survival benefits after myocardial infarction (MI). Mechanical reperfusion for acute MI targets optimal revascularization of the epicardial artery but also aims at improved myocardial salvage. Intracoronary thrombus (especially large amounts) makes both of these goals difficult to ...
BACKGROUND/AIMS To evaluate the geographic and demographic variabilities of the quantitative parameters of computed tomography perfusion (CTP) of the left ventricular (LV) myocardium in patients with normal coronary artery on computed tomography angiography (CTA). METHODS From a multicenter CTP registry of stress and static computed tomography, we retrospectively recruited 113 patients (mean ...
Myocardial work and its metabolic cost are important parameters in the pathogenesis and management of cardiovascular diseases. Myocardial efficiency, unlike other commonly used measures of cardiac function, accounts for both parameters. It has been demonstrated that myocardial oxygen demand can be reliably quantified using positron-emitting radionuclide tracers of oxygen flux, whereas cardiac w...
UNLABELLED Although many patients with heart failure benefit from cardiac resynchronization therapy (CRT), predicting which patients will respond to CRT remains challenging. Recent evidence suggests that the analysis of mechanical dyssynchrony using gated myocardial perfusion SPECT (MPS) may be an effective tool. The aim of this study was to evaluate global and regional gated MPS dyssynchrony m...
in this thesis, we consider a mathematical model of cancer with completely unknown parameters. we study the stability of critical points which are biologically admissible. then we consider a control on the system and introduce situations at which solutions are attracted to critical points and so the cancer disease has auto healing. the lyapunov stability method is used for estimating the un...
Mechanical properties and burning rate are very important parameters for solid propellants. In this work, the effects of quality and quantity of stabilizers as AkarditeII, 2-NDPA and CentraliteI on the Mechanical properties and burning rate of double-based is investigated. The results showed that, by CentraliteI increased mechanical properties of propellant and for AkarditeII and 2-NDPA stabili...
Knowledge on physical and mechanical properties of fruits is necessary for designing and optimizing processing systems. In this study, several physical and mechanical properties of date fruit (Kabkab cultivar) and its seed were determined. The average of length, width, thickness, unit mass, 1000 fruit mass, geometric mean diameter, unit volume, surface and projected areas, sphericity, fruit tru...
OBJECTIVE It has been demonstrated that tumor necrosis factor-alpha (TNFalpha) induces cardiomyocyte apoptosis. Apoptosis has been elucidated as playing an important role as one of the mechanisms of myocardial disorders. However, it is not known whether mechanical support with a left ventricular assist device (LVAD) and percutaneous cardiopulmonary support (PCPS) influence cardiomyocyte apoptos...
We report an uncommon case of simultaneous cardio-cerebral infarction, due to Inferior – right ventricle ST Segment Elevation Myocardial Infarction (STEMI) with acute ischemic stroke. Incidence cardio cerebral infarction is exceptionally rare, incidence rate as low 0.009%. Hemodynamic compromise in patients myocardial may result the blood flow reduction that cause hemodynamic Due rarity this co...
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