Type 2A von Willebrand syndrome is common in patients with severe aortic stenosis. Von Willebrand factor abnormalities are directly related to the severity of aortic stenosis and are improved by valve replacement in the absence of mismatch between patient and prosthesis.
PPVart and PPVfina predict fluid responsiveness during major hepatic surgery. This suggests that intraoperative monitoring of fluid responsiveness may be implemented simply and non-invasively.
Tissue-engineered heart valves created from mesenchymal stem cells, injected directly in a decellularized xenograft scaffold, exhibited satisfactory hemodynamic and histologic aspects after 4 months. Further long-term studies are needed to demonstrate the potential of mesenchymal stem cells for clinical application in heart valve surgery.
A single endotoxin injection in the rabbit was responsible for prolonged aortic endothelial cell dysfunction, as well as a prolonged procoagulant state. The latter is a potential trigger for disseminated intravascular coagulation. Importantly, these features are associated with normalization of conventional biological evidence of septic shock.
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