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An abdominal aortic aneurysm (AAA) is typically defined as aortic enlargement with a diameter of 3.0 cm or larger. The prevalence of AAA has declined over the past 2 decades among screened men 65 years or older in various European countries. The current prevalence of AAA in the United States is unclear because of the low uptake of screening. Most AAAs are asymptomatic until they rupture. Although the risk for rupture varies greatly by aneurysm size, the associated risk for death with rupture is as high as 8...
Abdominal aortic aneurysm (AAA) is a life-threatening vascular disease when aortic rupture occurs, especially for elders. There is an urgent need to understand the mechanisms of AAA formation and development at molecular level. Our previous study showed that disintegrin and metalloprotease 10 (ADAM10) played an important role in abdominal aortic aneurysm formation. In this study, we investigated the effects of another ADAM protein (ADMA9) in AAA formation.
Abdominal aortic aneurysm has become increasingly important owing to demographic changes. Some other diseases, for example, cholecystolithiasis, chronic obstructive pulmonary disease, and hernias, seem to co-occur with abdominal aortic aneurysm. The aim of this retrospective analysis was to identify new comorbidities associated with abdominal aortic aneurysm.
Vasculitidies are rare manifestations of human immunodeficiency virus (HIV) infection. They encompass a wide range of different pathologies, both infectious and noninfectious. We present the case of a 68-year-old female with HIV, being treated with antiretrovirals, who presented with a symptomatic abdominal aortic aneurysm (AAA). The aneurysm developed within one week. The patient underwent endovascular aneurysm repair and her aneurysm completely resolved on follow up CT imaging 16 months later. We also pre...
Idiopathic rupture of aortic valve commissure is an extremely rare cause of acute aortic regurgitation. Here, we reported one case of commissural rupture in the presence of a giant root aneurysm and a history of chronic aortic regurgitation, which emphasized the diagnostic value of high-quality 3-dimensional reconstructions of multimodality imaging in assessing the cause of abruptly deteriorating valve regurgitation.
This study quantifies the prevalence of thoracic aortic aneurysm (TAA) in patients with known abdominal aortic aneurysm (AAA).
Abdominal aortic aneurysm (AAA) is a permanent and irreversible dilation of the lower region of the aorta. It is typically an asymptomatic condition that if left untreated can expand to the point of rupture. In simple mechanical terms, rupture of an artery occurs when the local wall stress exceeds the local wall strength. It is therefore understandable that numerous studies have attempted to estimate the AAA wall stress and investigate the relationship between the AAA wall stress and AAA symptoms.
Aneurysm sac regression following endovascular repair (EVAR) of an abdominal aortic aneurysm (AAA) is an established indicator of surgical success. However, even with a completely excluded aneurysm, the degree of aortic sac regression may vary. This study evaluates the relationship between aneurysm sac regression after EVAR and the presence of morphological features in the thoracic aorta that can be associated with a subclinical aortic dissection, termed dissection morphology in this study.
Aortic aneurysm is a permanent focal dilation of the aorta. It is usually an asymptomatic disease, but can lead to sudden death due to aortic rupture. Aortic aneurysm-related mortalities are estimated at approximately 200,000 deaths per year worldwide. Since no pharmacological treatment has been found to be effective so far, surgical repair remains the only treatment for aortic aneurysm. Aortic aneurysm results from changes in the aortic wall structure due to loss of smooth muscle cells and degradation of t...
Chronic thrombosis of an abdominal aortic aneurysm (AAA) is a rare entity and the ideal management is debatable.
determine whether patient transfer adversely affects the survival of ruptured abdominal aortic aneurysm (rAAA) patients after conventional surgery.
Abdominal aortic aneurysm (AAA) is a potentially life-threatening disease, and until today there is no other treatment available than surgical intervention. Dipeptidyl peptidase-4 (DPP4)-inhibitors, used clinically to treat type 2 diabetes, have in murine models been shown to attenuate aneurysm formation and decrease aortic wall matrix degradation, inflammation and apoptosis. Our aim was to investigate if DPP4 is present, active and differentially expressed in human AAA.
Differences between the regions of the same country regarding the management of abdominal aortic aneurysm (AAA) have rarely been published. The aim of the study was to analyze the absolute and relative number of unruptured AAA repairs, utilizing endovascular aneurysm repair (EVAR) vs. open aneurysm repairs (OAR) and compare the AAA patients population from all 16 administrative districts in Poland.
Few series of Ruptured abdominal aortic aneurysm (RAAA) from Latin America have been published.
An abdominal aortic aneurysm (AAA) is defined as a localized dilation of the abdominal aorta that exceeds the maximal intraluminal diameter (MILD) by 1.5 times of its original size. Clinical and experimental studies have shown that small aneurysms may rupture, while a subpopulation of large aneurysms may remain stable. Thus, in addition to the measurement of intraluminal diameter of the aorta, knowledge of structural traits of the vessel wall may provide important information to assess the stability of the ...
Although endovascular repair (EVAR) is the first-line treatment for abdominal aortic aneurysm, type 2 endoleak (EL), which is associated with late sac enlargement or rupture, remains a concern. The present study aimed to assess the influence of type 2 EL on long-term outcomes after EVAR.
The durability of endovascular aneurysm repair (EVAR) when compared to open surgical repair (OSR) in younger patients for elective, infrarenal abdominal aortic aneurysms (AAA) remains unclear due to limited follow up.
Type II endoleaks from a patent inferior mesenteric artery (IMA) occur in up to one-third of patients undergoing endovascular repair of abdominal aortic aneurysms. In the majority of patients, retrograde flow in the aneurysmal sac outside the endograft will seal over time and is rarely associated with sac enlargement or aortic rupture. Intervention is generally recommended in patients with progressively enlarging endoleaks, especially when the sac diameter increases >10 mm during the follow-up, and endova...
Compared to mitral valve aneurysms, aortic valve (AV) aneurysm is a more rare and serious complication of infective endocarditis (IE). Early surgical intervention and valve replacement are required in order to prevent further complications such as embolization and rupture of aneurysm. We described a case of severe aortic regurgitation (AR) as a result of an aortic valve aneurysm in a patient with history of end-stage renal disease (ESRD) in whom the hemodialysis catheter had not been changed for a year.
Matrix metalloproteinases (MMPs) activation contributes to abdominal aortic aneurysm (AAA) growth and rupture. The study was to evaluate the ability of a novel activatable magnetic resonance imaging (MRI) nanoprobe, to target MMPs in an Angiotensin II (ANG II)-induced AAA model. The activatable nanoprobe is composed by a hydrophilic polyethylene glycol coating layer immobilized on the external surface of core/shell Fe/iron oxide nanoparticles, between them, there was grafted the MMP peptide substrate. In th...
Abdominal aortic aneurysm (AAA) is an asymptomatic condition due to the dilation of abdominal aorta along with progressive wall degeneration, where rupture of AAA is life-threatening. Failures of AAA endovascular repair (EVAR) reflect our inadequate knowledge about the complex interaction between the aortic wall and medical devices. In this regard, we are presenting a hydrogel-based anthropomorphic mockup (AMM) to better understand the biomechanical constraints during EVAR. By adjusting the cryogenic treatm...
This report describes the rapid expansion of a previously excluded abdominal aortic aneurysm (AAA) following type A aortic dissection repair in a 74-year-old male. Following successful hemi-arch replacement, CT angiography (CTA) showed residual dissection throughout the thoracoabdominal aorta which had created a proximal endoleak at the prior endovascular stentgraft resulting in rapid growth of the residual AAA sac. Urgent thoracic endovascular aortic repair (TEVAR) did not fully obliterate false lumen flow...
Ruptured abdominal aortic aneurysms (AAAs) have mortality estimated at 81%.
Abdominal aortic aneurysm (AAA) is a pathological enlargement of infrarenal aorta close to the aortic bifurcation, and it is an important cause of mortality in the elderly. Therefore, the biomarker identification for early diagnosis is of great interest for clinical benefit. It is known that microRNAs (miRNAs) have important roles via target genes regulation in many diseases. This study aimed to identify miRNAs and their target genes involved in the pathogenesis of AAA.