Search results for " aorta"

The role of interventional radiology in the management of abnormally invasive placenta: a systematic review of current evidences

2020

Abnormally invasive placenta (AIP) is a potentially severe condition. To date, arterial embolization in women with postpartum hemorrhage due to AIP is the treatment option for which highest degrees of evidence are available. However, other techniques have been tested, including prophylactic catheter placement, balloon occlusion of the iliac arteries and abdominal aorta balloon occlusion. In this systematic review, we provide an overview of the currently reported interventional radiology procedures that are used for the treatment of postpartum hemorrhage due to AIP and suggest recommendations based on current evidences. Owing to a high rate of adverse events, prophylactic occlusion of intern…

Surgical anatomy applied to transperitoneal approaches of the abdominal aorta and visceral trunks. Dynamic article.

2020

Access to the abdominal aorta and its visceral trunks is possible through several approaches. Dissections of five cadavers performed during three National Surgical Anatomy courses applied to Aorta, Hepatobiliopancreatic and Digestive Surgery. Videos and pictures were taken throughout the dissections and showed different abdominal aorta approaches. Abdominal aorta and visceral trunks approaches: longitudinal inframesocolic access, supraceliac clamping, celiac trunk dissection, superior mesenteric artery approaches (retroperitoneal after Kocher menoeuvre, supramesocolic or inframesocolic), Cattell-Braasch manoeuvre and mattox manoeuvre: retrorenal and prerenal. Correct knowledge of the intraa…

A late diagnosis of aortic coarctation began as an acute coronary syndrome

2014

Abstract Aortic coarctation accounts the 5%–10% of congenital heart disease. It is usually diagnosed during childhood but the postductal form is most common in adults and may be diagnosed incidentally in the context of investigation for hypertension. The age of correction is the most important factor for the relief of hypertension and long-term survival. We describe a case of a 63-year-old man, came to our emergency room for acute coronary syndrome. Cardiac catheterization with right femoral artery access was performed but for many difficulties during the introduction of catheters was therefore performed aortography that showed an interruption "a cul de sac" at the level of the descending t…

Endovaskuläre Therapie aortaler Aneurysmen: erste klinische Ergebnisse

1996

PURPOSE A clinical study aiming at examining the implantation technique and the clinical results of a new vascular prosthesis in endovascular therapy of aneurysms of the aorta. MATERIAL AND METHODS In 21 patients (20 men of 55 to 87 years of age, average age 70 years) with aneurysms of the infrarenal abdominal aorta (AAA n = 19) and the thoracic aorta (n = 2), a self-expanding nitinol stent with outer Dacron sheath (tubular prosthesis n = 4; bifurcation prosthesis n = 17) was implanted by means of an F-18 introductory set after surgical opening of the inguinal artery. RESULTS By means of the 4 tubular prostheses and 13 of the 17 bifurcation prostheses the aneurysm was bypassed completely. I…

Coarctation of the Aorta: Quantitative Analysis by Transesophageal Echocardiography

1987

Summary Transesophageal echocardiography and standard two-dimensional echocardiography were performed in 15 patients with suspected coarctation of the aorta. Aortic diameters and crosssectional areas were determined by means of TEE and compared with clinical findings and catheterization data. The isthmus of the aorta could be imaged in all patients using TEE, but in only seven patients using standard suprasternal echocardiography. Compared with controls, aortic diameters were narrowed in 9 of 15 patients, and cross-sectional areas were reduced in 13 of 15. There was a satisfactory correlation between TEE data and angiographic and hemodynamic data. TEE is a promising method of a diagnosing a…

Flußquantifizierung von intrakardialen Shuntvolumina unter Verwendung der MR-Phasenkontrast-Technik in Atemanhaltephase

1998

PURPOSE Comparison of a breath-hold, velocity-encoded, phase-difference magnetic resonance (MR) sequence for intracardiac shunt flow measurement with the invasive shunt size determination by oximetry. PATIENTS AND METHODS 10 patients with different cardiac shunts (6 ASD/3 VSD/1 PDA) and four healthy individuals were investigated using a 1.5 Tesla Siemens Vision system. For flow measurements a breath-hold, velocity-encoded, phase-difference magnetic resonance (MR) sequence was used ('through plane', FLASH 2D-sequence, TR/TE 110/5 ms, 'velocity encoding' 250 cm/s). Mean flow (ml/R-R interval) in the ascending aorta, the pulmonary trunk, and the right and left pulmonary arteries was determined…

016: Evidence of systemic plaque vulnerability in acute coronary syndromes with FDG-positron emission tomography and computed tomographic angiography…

2013

PurposeAtherosclerotic plaque vulnerability is a systemic phenomenon and is often associated with severe plaque infiltration with inflammatory cells. 18-Fluoro-deoxyglucose (FDG) accumulates in inflammatory cells of atherosclerotic plaques. The aim of this study was to assess whether 1) FDG uptake in the aorta and carotid arteries measured by positron emission tomography (PET) is higher in patients with acute coronary syndromes (ACS) than in patients with stable coronary artery disease (CAD) and; 2) associated with morphological markers of plaque instability detected with computed tomography angiography (CTA).MethodsPatients with ACS (n=50) or stable CAD (n=28) underwent a PET 90 minutes af…

Computational fluid dynamics simulation to evaluate aortic coarctation gradient with contrast-enhanced CT

2014

Coarctation of aorta (CoA) is a narrowing of the aorta leading to a pressure gradient (Delta P) across the coarctation, increased afterload and reduced peripheral perfusion pressures. Indication to invasive treatment is based on values of maximal (systolic) trans-coarctation Delta P. A computational fluid dynamic (CFD) approach is herein presented for the non-invasive haemodynamic assessment of Delta P across CoA. Patient-specific CFD simulations were created from contrast-enhanced computed tomography (CT) and appropriate flow boundary conditions. Computed Delta P was validated with invasive intravascular trans-CoA pressure measurements. Haemodynamic indices, including pressure loss coeffic…

Fístula aortoentérica secundaria a infección de prótesis aortobifemoral

2002

Presentamos el caso de un hombre de 76 años, intervenido de una obstrucción iliaca bilateral mediante colocación de una prótesis aortobifemoral, que cinco años después presentó dolor en la fosa iliaca izquierda y fiebre en agujas de 39º C. En la exploración física destacaba un abdomen doloroso en la fosa iliaca izquierda con signos de irritación peritoneal. En las pruebas de laboratorio se detectó una leucocitosis con neutrofilia y hemocultivos negativos. La tomografía computadorizada (TC) objetivó la presencia de burbujas de gas alrededor de la prótesis, así como una colección líquida con áreas necróticas en su interior que afectaba a los músculos psoas e iliaco. En la misma exploración, l…

2018

Background The aim of our study was to evaluate the feasibility of exercise cardiac magnetic resonance (CMR) in patients with repaired tetralogy of Fallot (RTOF) and to assess right and left ventricular adaptation and aortic wall response to exercise in comparison with volunteers. Methods 11 RTOF and 11 volunteers underwent prospective CMR at rest and during exercise. A supine bicycle ergometer was employed to reach twice the resting heart rate during continuous exercise, blood pressure and heart rate were recorded. Bi-ventricular parameters and aortic stiffness were assessed using accelerated cine sequences and flow-encoding CMR. A t-test was used to compare values between groups. A Mann W…