نتایج جستجو برای: pulmonary artery hypertension
تعداد نتایج: 527701 فیلتر نتایج به سال:
Pulmonary hypertension has been associated with poor outcome after liver transplantation. We assessed the diagnostic accuracy of Doppler echocardiography in detecting significant pulmonary hypertension. Seventy-four potential liver transplant candidates underwent Doppler echocardiography in which the systolic right ventricular pressure (RVsys) was used to estimate the systolic pulmonary artery ...
Three patients with primary pulmonary hypertension and one man with suspected thromboembolic pulmonary hypertension were given up to 300 mg diazoxide by injection into the pulmonary artery. The three patients with primary pulmonary hypertension responded with a fall in total pulmonary resistance and a rise in cardiac output. The patient with suspected thromboembolic pulmonary hypertension did n...
Chronic pulmonary hypertension in humans is characterized by shortening of the pulmonary artery acceleration time as measured by Doppler echocardiography, such that the higher the pulmonary artery pressure, the shorter the pulmonary acceleration time. Increases in heart rate are also known to produce decreases in the pulmonary artery acceleration time. To explore the relationship between mean p...
BACKGROUND Single lung transplantation, bilateral lung transplantation and combined heart-lung transplantation are the procedures currently being performed in patients with arterial pulmonary hypertension and pulmonary hypertension as a result of end-stage lung disease. In patients with severe pulmonary hypertension, regardless of its aetiology, general anaesthesia and mechanical ventilation co...
The hemodynamic evaluation of the pulmonary circulation normally includes the measurements of mean pulmonary artery pressure and a calculation of pulmonary vascular resistance (PVR). The definition of PVR can be improved by the measurements of pulmonary vascular pressures at several levels of flow to derive a pressure-flow line, and the site of PVR can be identified by the analysis of pulmonary...
A 34-year-old woman was admitted to the hospital because of recently aggravated right heart failure without angina for 5 months. When she was 25 years old, patch repair with Polytetrafluoroethylene (PTFE) was performed for the secondum type of atrial septal defect (ASD) with moderate pulmonary hypertension. The chest PA, echocardiography and cardiac catheterization at current admission revealed...
This report describes a patient who developed pulmonary hypertension 6 years after lung transplantation for primary pulmonary hypertension (PPH). Evaluation with right heart catheterization followed by pulmonary angiography, however, demonstrated that the pulmonary hypertension was secondary to an anastomotic narrowing of the pulmonary artery, rather than a recurrence of her PPH. Vascular compl...
BACKGROUND The pulmonary vasoreactivity rate of Schistosomal Pulmonary Artery Hypertension (SPAH) is not known. Hemodynamic data obtained by cardiac catheterization are associated with the most commonly used clinical criteria of severity. OBJECTIVE To estimate the percentage of positive vasoreactivity to nitric oxide in schistosomal pulmonary arterial hypertension and verify the association o...
RATIONALE Pulmonary arterial hypertension is characterized by endothelial dysfunction, impaired bone morphogenetic protein receptor 2 (BMPR2) signaling, and increased elastase activity. Synthetic elastase inhibitors reverse experimental pulmonary hypertension but cause hepatotoxicity in clinical studies. The endogenous elastase inhibitor elafin attenuates hypoxic pulmonary hypertension in mice,...
Mitral stenosis is associated with increased pulmonary artery pressure and resistance. Adrenomedullin, discovered in human pheochromocytoma tissue in 1993, has shown to dilate the pulmonary vessels and so may participate in the control of pulmonary circulation. In this study, we assessed the plasma concentration of adrenomedullin in patients complaining of rheumatic mitral stenosis, with and wi...
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