The effect of heart rate, vessel angulation and acquisition protocol on the estimation accuracy of calcified artery stenosis in dual energy cardiac CT: A phantom study
Coronary Computed Tomography Angiography (CCTA) has been a well established non-invasive technique for the assessment of coronary artery disease (CAD). Despite the advances in CT technology, the artifacts caused by cardiac motion at high heart rates still remain a major issue in the interpretation of cardiac CT images since they affect delineation of coronary anatomy and reduce the ability of physicians to accurately assess stenotic coronary lesions [1,2]. Another deficiency of CCTA is the difficulty in evaluating vessel segments with extensive calcified plaque.
We present a case of a 52-year-old woman accessed to the emergency department for chest and right upper limb pain that increased in the last days. She underwent a computed tomography angiogram showing interruption of the aortic arch, distal to left subclavian artery origin, large bilateral collateral vessels connecting subclavian arteries to descending aorta with multiple voluminous aneurysms, a bicuspid aortic valve, dilatated tubular segment of ascending thoracic aorta, and a suspected atrial septal defect. A nonsystematic literature review regarding these conditions has been performed.
Long-term data relating coronary computed tomography angiography (CTA) to coronary artery disease (CAD) prognosis including novel CTA-biomarkers ( “high–risk plaque criteria”) is scarce. The aim of this study was to define predictors of long-term outcomes.
AbstractAfter the introduction and the quick improvement of multidetector computed tomography technology, computed tomographic angiography (CTA) has become the imaging examination of choice for the first assessment of patients affected by lower extremities acute disorders. The widespread availability of CT equipment, the high temporal and spatial resolution with post-processing reformation possibilities represent the main advantages of this technique, which can reliably identify different findings related to arterial vessel pathology, such as occlusion, dissection, active bleeding, and pseudoaneurysm. Radiologists should k...
Purpose: Many patients with ischemic stroke have concomitant coronary artery disease (CAD). However, it remains unclear which stroke patients should undergo evaluation for asymptomatic CAD, and which screening tools are appropriate. We investigated the role of coronary artery calcium (CAC) score as a screening tool for asymptomatic but severe CAD in acute stroke patients. We determined the selection criteria for CAC screening based on risk factors and cerebral atherosclerosis.Materials and Methods: The present study included consecutive patients with acute stroke who had undergone cerebral angiography and multi-detector co...
By STEPHEN BORSTELMANN, MD Occasionally, you get handed a question you know little about, but it’s clear you need to know more. Like most of us these days, I was chatting with my colleagues about the novel coronavirus. It goes by several names: SARS-CoV-2, 2019-nCoV or COVID-19 but I’ll just call it COVID. Declared a pandemic on March 12, 2020 by the World Health Organization (WHO), COVID is diagnosed by laboratory test – PCR. The early PCR test used in Wuhan was apparently low sensitivity (30-60%), lengthy to run (days), and in short supply. As CT scanning was relatively availa...
CONCLUSIONS: CTA in FFBR can have a wider impact than facilitating surgical planning and reducing operative times. Incidental findings can influence the surgical plan, and in some instances, avoid doomed-to-fail and unsafe surgery. It is therefore important that these scans are reported by an experienced radiologist. PMID: 32203991 [PubMed]
CONCLUSION: The double microcatheter technique for the treatment of wide-necked VRAAs appears to be relatively safe and useful. However, complex renal artery aneurysm should be carefully managed in order to prevent infarction. PMID: 32209509 [PubMed - as supplied by publisher]
In patients with non-valvular atrial fibrillation (AF) and increased stroke risk, the left atrial appendage (LAA) is a primary source of thrombus . Percutaneous left atrial appendage closure (LAAC), a minimally invasive procedure, is increasingly performed to reduce AF stroke risk . For successful clinical outcomes, it is therefore imperative that the Watchman implant —one such LAA closure device—maintains long-term efficacy. The PROTECT-AF trial, for instance, reported peridevice leak in 32% of patients post-LAAC.
We administered intravenous thrombolytic therapy to a 51-year-old female patient with a 101-min stroke onset. The patient was unconscious during the manifestation of symptoms. Computed tomography angiography examination of the intracranial artery at the time of admission suggested that the left middle cerebral artery was occluded. The patient regained consciousness after the intravenous thrombolytic treatment was administered. On an urgent cerebral angiography, it was revealed that the recanalization of the left middle cerebral artery was successful.
Publication date: Available online 21 March 2020Source: Academic RadiologyAuthor(s): Liang Jin, Yiyi Gao, An'qi Jiang, Zhenlin Li, Peijun Wang, Ming Li