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Complications of axillofemoral, femoral-femoral, and iliac-femoral grafts Diagnosis, Prevention, and Management
Published in Sachinder Singh Hans, Mark F. Conrad, Vascular and Endovascular Complications, 2021
Farah Mohammad, Mitchell Weaver
The diagnosis of graft occlusion is typically evident on physical exam by loss of graft pulse, as well as in the case of these inflow bypasses, a femoral pulse. Graft occlusion may be confirmed using imaging studies such as duplex ultrasound, CT angiography and catheter-based angiography. Duplex ultrasound has the advantage of being noninvasive but may not be able to fully evaluate inflow and outflow vessels for operative planning. CT angiography is usually readily available and allows for imaging of not only the graft but also inflow and out flow vessels. Down sides to CT angiography include the use of radiation and IV contrast. Conventional angiography may also be useful, as at the same time in appropriate candidates catheter-directed thrombolysis may be initiated if the graft thrombosis is believed to be relatively acute and the graft is configured in such a way that allows it to be crossed with an infusion catheter. Catheter-directed thrombolysis allows for possible salvage of the graft and possible exposure of an underlying lesion that led to graft thrombosis, which can then be treated in order to prevent recurrent thrombosis (i.e., common/deep femoral artery occlusive disease requiring endarterectomy). Other treatment options include an attempt at surgical graft thrombectomy and then assessing for an underlying culprit lesion that can be treated.
Medium vessel vasculitis
Published in Biju Vasudevan, Rajesh Verma, Dermatological Emergencies, 2019
Conventional angiography is the gold standard for visualization of the coronary vasculature; however, it is invasive and causes children to be exposed to radiation. CT angiography and cardiac MRI are alternatives [54]. These imaging techniques are not routinely used in the diagnosis and management of KD [62].
Management of Acute Intestinal Ischaemia
Published in Peter Sagar, Andrew G. Hill, Charles H. Knowles, Stefan Post, Willem A. Bemelman, Patricia L. Roberts, Susan Galandiuk, John R.T. Monson, Michael R.B. Keighley, Norman S. Williams, Keighley & Williams’ Surgery of the Anus, Rectum and Colon, 2019
Michael J. Stamos, John V. Gahagan
Conventional angiography is unique compared to the other studies in that it provides the ability for both diagnosis and therapy. It has long been and continues to be the gold standard for diagnosis of mesenteric ischaemia. Both anterior-posterior and lateral views should be obtained with aortography. The anterior views visualise disease within the distal mesenteric vessels. The lateral views allow for detection of proximal disease at the origins of the coeliac artery, SMA and IMA. In the setting of non-occlusive disease, angiography allows for the intra-arterial infusion of a vasodilator, such as papaverine, which can be both diagnostic and therapeutic.
Optical Coherence Tomography Angiography in Posner-Schlossman Syndrome – A Preliminary Study
Published in Ocular Immunology and Inflammation, 2023
Jinyuan Chen, Xiaoyong Chen, Yihua Yao, Yihua Zhu
The pathologic and etiology mechanisms of PSS have remained elusive. Current research suggested that cytomegalovirus (CMV) infection, vascular dysfunction, etc. may be the cause of PSS. The vascular theory considers glaucomatous optic neuropathy to be a consequence of insufficient ocular blood supply.6,7 Optical coherence tomography angiography (OCTA) is a relatively new, promising, non-invasive imaging modality for retinal vascular examination, which serves as a quick, reproducible, and objective way to qualitatively and quantitatively show areas of altered perfusion in the eye. Its advantages include increasing imaging range with improved detection efficiency, and no need for contrast agents than conventional angiography methods.8 To the best of our knowledge, there is no report about vessel density (VD) in PSS.
Comparative study between multi-detector computed tomography and echocardiography in evaluation of congenital vascular rings
Published in Alexandria Journal of Medicine, 2018
Manal Hamisa, Fatma Elsharawy, Wafaa Elsherbeny, Suzan Bayoumy
Echocardiography was the first imaging modality in diagnosis congenital aortic arch anomalies, but this modality is operator dependent and also limited by an acoustic shadow this leads to inadequate evaluation of great vessels.4,5 Conventional angiography is considered the golden standard in diagnosis of congenital heart disease however it has many disadvantages including it is invasive procedure, needs general anesthesia and also risk of radiation and side effect of contrast agent.6 Multi-detector computed tomography (MDCT) with increased z-axis coverage, higher spatial resolution (faster more than 360 rotation times) make the delineation of great vessels are excellent with less imaging times and less artifacts using fewer amount of contrast material.7
Concurrent pulmonary artery aneurysms and intracardiac thrombus in a Caucasian man with Behçet’s disease: case report and literature review
Published in Modern Rheumatology Case Reports, 2018
Jean Liew, Daniela Ghetie, Danielle Hosmer, Cailin Sibley
PAAs and associated findings may appear on conventional radiographs of the chest as rounded hilar or peripheral opacities. The diagnosis of PAAs is best performed with CT or MR angiogram. Conventional angiography should be avoided as venipuncture risks further aneurysm formation [3,46]. Tunaci et al. [4], demonstrated that the resolution of PAAs include the formation of thrombotic changes within the vessel lumen as seen during serial CT monitoring. In our patient, serial CT images demonstrated a similar progression (Figure 1). There is only limited data on screening for pulmonary manifestations in those who are asymptomatic, but these studies do not support routine pulmonary function tests or thoracic imaging due to the low probability of disease detection, and the poor correlation of findings with actual disease [7,8].