Pulmonary artery sarcoma (PAS) is a sporadic malignant tumor that mainly originates from the pulmonary arteries. However, PAS may also involve the right ventricular outflow tract (RVOT) and lead to obstruction… Read More
Category: General
Pulmonary artery sarcoma: an unexpected settler in the right ventricular outflow tract
Pulmonary artery sarcoma (PAS) is a sporadic malignant tumor that mainly originates from the pulmonary arteries. However, PAS may also involve the right ventricular outflow tract (RVOT) and lead to obstruction… Read More
Recurrent embolic strokes due to antiphospholipid syndrome and non-bacterial thrombotic endocarditis in a patient with basal cell carcinoma
Non-Bacterial Thrombotic Endocarditis (NBTE) is a common form of aseptic thrombotic endocarditis that primarily affects mitral valves and less frequently aortic valves. NBTE is caused by systemic inflammatory … Read More
Flaw-insensitive fatigue resistance of chemically fixed collagenous soft tissues
Sci Adv. 2023 Mar 3;9(9):eade7375. doi: 10.1126/sciadv.ade7375. Epub 2023 Mar 3.
ABSTRACT
Bovine pericardium (BP) has been used as leaflets of prosthetic heart valves. The leaflets are sutured on metallic stents and can survive 400 million flaps (~10-year life span), unaffected by the suture holes. This flaw-insensitive fatigue resistance is unmatched by synthetic leaflets. We show that the endurance strength of BP under cyclic stretch is insensitive to cuts as long as 1 centimeter, about two orders of magnitude longer than that of a thermoplastic polyurethane (TPU). The flaw-insensitive fatigue resistance of BP results from the high strength of collagen fibers and soft matrix between them. When BP is stretched, the soft matrix enables a collagen fiber to transmit tension over a long length. The energy in the long length dissipates when the fiber breaks. We demonstrate that a BP leaflet greatly outperforms a TPU leaflet. It is hoped that these findings will aid the development of soft materials for flaw-insensitive fatigue resistance.
PMID:36867693 | PMC:PMC9984180 | DOI:10.1126/sciadv.ade7375
Retraction Note: Predictors of sternal wound infection post cardiac surgery in a saudi centre: a case control study
Comparison of population characteristics and clinical outcomes of patients with type B aortic dissection or aortic intramural hematoma underwent thoracic endovascular aortic repair: a propensity score-matched analysis
Survival and aortic-related adverse events after thoracic endovascular aortic repair (TEVAR) for aortic intramural hematoma (IMH) and aortic dissection (AD) are controversial. We aimed to assess the preoperati… Read More
Monophasic pericardial synovial sarcoma in a turkish female patient: a very rare case with cyto-histopathological findings
The aim was to present a 35-year-old female patient with diagnosis of monophasic primary pericardial synovial sarcoma (PSS) with cytopathological findings.
Pulmonary artery sarcoma: an unexpected settler in the right ventricular outflow tract
Pulmonary artery sarcoma (PAS) is a sporadic malignant tumor that mainly originates from the pulmonary arteries. However, PAS may also involve the right ventricular outflow tract (RVOT) and lead to obstruction… Read More
Retraction Note: Predictors of sternal wound infection post cardiac surgery in a saudi centre: a case control study
Using WeChat to guide preparation before transthoracic echocardiography reduces anxiety and improves satisfaction of parents of infants with congenital heart disease
To explore the effect of using WeChat to guide preparation before transthoracic echocardiography (TTE) on reducing anxiety and improving the satisfaction of parents of infants with congenital heart disease (CHD).