Thoracic aortic pseudoaneurysm caused by Brucella melitensis is extremely rare with extremely few cases reported to date. Herein, we present the case of a 65 year-old man with a huge pseudoaneurysm of the proxima… Read More
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Left atrial dissection after a supra-annular mitral valve replacement for endocarditis
Left atrial dissection is a rare and a potentially fatal complication of cardiac surgery. Multi-modal imagery is helpful for the diagnosis and to guide the treatment.
Surgical treatment of thoracic aortic pseudoaneurysm caused by Brucella melitensis
Thoracic aortic pseudoaneurysm caused by Brucella melitensis is extremely rare with extremely few cases reported to date. Herein, we present the case of a 65 year-old man with a huge pseudoaneurysm of the proxima… Read More
Resection of a schwannoma originating from vagus nerve in the right superior mediastinum
Schwannoma is the most common mediastinal neurogenic tumor, while schwannoma originating from mediastinal vagus nerve is rare.
Combining aortic arch dissection stent implantation and root surgery for aortic dissection type A
Acute aortic dissection type A (AADA) is associated with high perioperative morbidity and mortality. A novel non-covered hybrid prosthesis (AMDS, CryoLife, Kennesaw, USA) can be easily implanted to stabilize t… Read More
Managing blunt cardiac injury
Blunt cardiac injury (BCI) encompasses a spectrum of pathologies ranging from clinically silent, transient arrhythmias to deadly cardiac wall rupture. Of diagnosed BCIs, cardiac contusion is most common. Sugge… Read More
Prevalence and clustering of cardiovascular risk factors among resident of coastal areas in Qinzhou, Guangxi, China
We aimed to estimate the prevalence of CRFs and investigate its associated social-economic factors among adults in coastal areas of Qinzhou, Guangxi.
Resection of a schwannoma originating from vagus nerve in the right superior mediastinum
Schwannoma is the most common mediastinal neurogenic tumor, while schwannoma originating from mediastinal vagus nerve is rare.
Anisotropic Mechanical Response of Bovine Pericardium Membrane Through Bulge Test and In-Situ Confocal-Laser Scanning
J Biomech Eng. 2023 Mar 1;145(3):031009. doi: 10.1115/1.4056398.
ABSTRACT
In this work, we present a new experimental setup for the assessment of the anisotropic properties of Bovine Pericardium (BP) membranes. The chemically fixed BP samples have been subjected to a bulge test with in situ confocal laser scanning at increasing applied pressure. The high resolution topography provided by the confocal laser scanning has allowed to obtain a quantitative measure of the bulge displacement; after polynomial fitting, principal curvatures have been obtained and a degree of anisotropy (DA) has been defined as the normalized difference between the maximum and minimum principal curvatures. The experiments performed on the BP membranes have allowed us to obtain pressure-displacement data which clearly exhibit distinct principal curvatures indicating an anisotropic response. A comparison with curvatures data obtained on isotropic Nitrile Buthadiene Rubber (NBR) samples has confirmed the effectiveness of the experimental setup for this specific purpose. Numerical simulations of the bulge tests have been performed with the purpose of identifying a range of constitutive parameters which well describes the obtained range of DA on the BP membranes. The DA values have been partially validated with biaxial tests available in literature and with suitably performed uni-axial tensile tests.
PMID:36472464 | DOI:10.1115/1.4056398
Infective endocarditis of quadricuspid aortic valve
Infective endocarditis of the aortic valve is a relatively common disease presentation, with surgical intervention a mainstay of treatment in severe cases. Quadricuspid aortic valves are a rare spontaneous dev… Read More