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https://www.readbyqxmd.com/read/28238250/atrial-septostomy-as-a-bridge-to-replace-a-thrombosed-mechanical-aortic-valve-requiring-extracorporeal-membrane-oxygenation
#1
Adarsh Katamreddy, David F Snipelisky, Mackram F Eleid
Atrial septostomy is an infrequently used percutaneous technique to decompress either side of the heart. Here, a case is reported of atrial septostomy performed as an emergency 'bridge' procedure in a hemodynamically unstable 62-year-old man with acute mechanical prosthetic aortic valve thrombosis requiring peripheral venoarterial (VA) extracorporeal membrane oxygenation (ECMO). ECMO was placed emergently as the patient suffered cardiac arrest during anesthesia induction for surgical replacement of the thrombosed prosthetic aortic valve...
September 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28237318/strokes-are-possible-complications-of-cannabinoids-use
#2
REVIEW
Valérie Wolff, Emilie Jouanjus
It is critically important to identify all factors that may play a role in the recent increase of the incidence of stroke among the young population. Considering the worldwide use of cannabinoids (cannabis and synthetic cannabinoids), the recent legalization of their consumption in some countries, and their supposed involvement in cardiovascular events, we evaluated their role in the occurrence of neurovascular complications among the young. Ninety-eight patients were described in the literature as having a cannabinoids-related stroke (85 after cannabis use and 13 after synthetic cannabinoids)...
February 23, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28237004/nuclear-medicine-in-pediatric-cardiology
#3
REVIEW
Ornella Milanesi, Giovanni Stellin, Pietro Zucchetta
Accurate cardiovascular imaging is essential for the successful management of patients with congenital heart disease (CHD). Echocardiography and angiography have been for long time the most important imaging modalities in pediatric cardiology, but nuclear medicine has contributed in many situations to the comprehension of physiological consequences of CHD, quantifying pulmonary blood flow symmetry or right-to-left shunting. In recent times, remarkable improvements in imaging equipments, particularly in multidetector computed tomography and magnetic resonance imaging, have led to the progressive integration of high resolution modalities in the clinical workup of children affected by CHD, reducing the role of diagnostic angiography...
March 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28236133/subjective-and-objective-image-differences-in-pediatric-computed-tomography-cardiac-angiography-using-lower-iodine-concentration
#4
Jae-Yeon Hwang, Ki Seok Choo, Yoon Young Choi, Jin Hyeok Kim, Hwaseong Ryu, Junhee Han, Yong-Woo Kim, Ung Bae Jeon, Kyung Jin Nam
BACKGROUND: Several recent studies showed the optimal contrast enhancement with a low-concentration and iso-osmolar contrast media in both adult and pediatric patients. However, low contrast media concentrations are not routinely used due to concerns of suboptimal enhancement of cardiac structures and small vessels. OBJECTIVE: To evaluate the feasibility of using iso-osmolar contrast media containing a low iodine dose for CT cardiac angiography at 80 kilovolts (kVp) in neonates and infants...
February 24, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28236047/value-of-blood-flow-velocity-on-color-doppler-ultrasonography-for-optimization-of-delay-in-scanning-time-on-computed-tomography-venography-in-patients-with-budd-chiari-syndrome-and-inferior-vena-cava-obstruction
#5
Peng-Li Zhou, Lei Yan, Gang Wu, Xin-Wei Han, Wen-Guang Zhang
PURPOSE: To prospectively determine the value of blood flow velocity in the inferior vena cava (IVC) on color Doppler ultrasonography for the optimization of the delay in scanning time after contrast injection during computed tomography (CT) venography in patients with Budd-Chiari syndrome (BCS) with IVC obstruction. METHODS: We enrolled 122 consecutive BCS patients with IVC obstruction. All patients underwent color Doppler ultrasonography, CT venography, and digital subtraction angiography (DSA) in that order prior to treatment...
February 24, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28236025/incremental-diagnostic-quality-gain-of-cta-over-v-q-scan-in-the-assessment-of-pulmonary-embolism-by-means-of-a-wells-score-bayesian-model-results-from-the-acdc-collaboration
#6
Laila Cochon, Kaitlin McIntyre, José M Nicolás, Amado Alejandro Baez
OBJECTIVE: Our objective was to evaluate the diagnostic value of computed tomography angiography (CTA) and ventilation perfusion (V/Q) scan in the assessment of pulmonary embolism (PE) by means of a Bayesian statistical model. METHODS: Wells criteria defined pretest probability. Sensitivity and specificity of CTA and V/Q scan for PE were derived from pooled meta-analysis data. Likelihood ratios calculated for CTA and V/Q were inserted in the nomogram. Absolute (ADG) and relative diagnostic gains (RDG) were analyzed comparing post- and pretest probability...
February 24, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28235952/rete-mirabile-associated-with-pial-arteriovenous-fistula-imaging-features-with-literature-review
#7
Prabath Kumar Mondel, Rashmi Saraf, Uday S Limaye
A rete mirabile is a vascular network of intercommunicating small arteries or arterioles that replace the definitive adult artery supplying the brain. It supplies the brain in lower mammals but is not seen in normal human embryological development. A 26-year-old man presented with worsening tinnitus that was interfering with his sleep. On CT and digital subtraction angiography he was found to have a temporal lobe pial arteriovenous fistula with bilateral carotid and vertebral rete mirabile. The patient was offered open surgical and endovascular treatment options for pial arteriovenous fistula but he refused both and opted for conservative medical management...
February 24, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28231322/clinical-evaluation-of-new-automatic-coronary-specific-best-cardiac-phase-selection-algorithm-for-single-beat-coronary-ct-angiography
#8
Hui Wang, Lei Xu, Zhanming Fan, Junfu Liang, Zixu Yan, Zhonghua Sun
The aim of this study was to evaluate the workflow efficiency of a new automatic coronary-specific reconstruction technique (Smart Phase, GE Healthcare-SP) for selection of the best cardiac phase with least coronary motion when compared with expert manual selection (MS) of best phase in patients with high heart rate. A total of 46 patients with heart rates above 75 bpm who underwent single beat coronary computed tomography angiography (CCTA) were enrolled in this study. CCTA of all subjects were performed on a 256-detector row CT scanner (Revolution CT, GE Healthcare, Waukesha, Wisconsin, US)...
2017: PloS One
https://www.readbyqxmd.com/read/28228431/right-upper-quadrant-abdominal-pain-as-the-initial-presentation-of-polyarteritis-nodosa
#9
Ricardo Gago, Lee Ming Shum, Luis M Vilá
Polyarteritis nodosa (PAN) is a necrotising vasculitis that involves medium and small vessels. PAN generally presents with constitutional, cutaneous, neurological, renal and gastrointestinal manifestations. However, PAN initially involving a single organ/system is uncommon. Here, we present a 42-year-old man who was hospitalised because of severe right upper quadrant abdominal pain that started 2 months before. Physical examination was remarkable for right upper quadrant abdominal tenderness. Abdominopelvic CT showed lymphadenopathy but no hepatic, gallbladder, pancreatic, intestinal or renal abnormalities...
February 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28228312/a-study-of-coronary-artery-variants-and-anomalies-observed-at-a-tertiary-care-armed-forces-hospital-using-64-slice-mdct
#10
Akhilesh Rao, Yayati Pimpalwar, Neha Yadu, R K Yadav
BACKGROUND: Isolated coronary artery anomalies are usually clinically silent and mostly detected incidentally during angiography or autopsy. However, few of them may be implicated in cases of sudden cardiac death even in the absence of additional heart abnormalities. Prior knowledge of such variants and anomalies is necessary for planning various interventional procedures. Multiple detector computed tomography coronary angiography has proved a very useful non-invasive modality in this field given its superiority over conventional coronary angiography in providing detailed coronary artery anatomy...
January 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28225687/reducing-iodine-contrast-volume-in-ct-angiography-of-the-abdominal-aorta-using-integrated-tube-potential-selection-and-weight-based-method-without-compromising-image-quality
#11
Rogerio Vasconcelos, Terri J Vrtiska, Thomas A Foley, Thanila A Macedo, Juan C Montoya Cardona, Eric E Williamson, Cynthia H McCollough, Joel G Fletcher
OBJECTIVE: The purpose of this study is to determine whether image quality was maintained when a weight-based protocol incorporating tube potential selection was used to select lower iodine contrast volumes for aortic CT angiography (CTA). MATERIALS AND METHODS: Patients with potentially decreased renal function underwent CTA performed with the iodinated contrast volume determined using a table incorporating different tube potentials and patient weights. The image quality of CTA examinations performed with a reduced iodine volume (hereafter known as "low-iodine CTA examinations"), internal control CTA examinations (i...
March 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28224927/an-age-and-sex-specific-gene-expression-score-is-associated-with-revascularization-and-coronary-artery-disease-insights-from-the-prospective-multicenter-imaging-study-for-evaluation-of-chest-pain-promise-trial
#12
Deepak Voora, Adrian Coles, Kerry L Lee, Udo Hoffmann, James A Wingrove, Brian Rhees, Lin Huang, Susan E Daniels, Mark Monane, Steven Rosenberg, Svati H Shah, William E Kraus, Geoffrey S Ginsburg, Pamela S Douglas
BACKGROUND: Identifying predictors of coronary artery disease (CAD)-related procedures and events remains a priority. METHODS: We measured an age- and sex-specific gene expression score (ASGES) previously validated to detect obstructive CAD (oCAD) in symptomatic nondiabetic patients in the PROMISE trial. The outcomes were oCAD (≥70% stenosis in ≥1 vessel or ≥50% left main stenosis on CT angiography [CTA]) and a composite endpoint of death, myocardial infarction, revascularization, or unstable angina...
February 2017: American Heart Journal
https://www.readbyqxmd.com/read/28221263/use-of-model-based-iterative-reconstruction-to-improve-detection-of-congenital-cardiovascular-anomalies-in-infants-undergoing-free-breathing-computed-tomographic-angiography
#13
Seth Kligerman, Ferdia Bolster, Jason Mitchell, Travis Henry, Jean Jeudy, Charles S White
PURPOSE: The aim of the study was to assess the detection of congenital cardiovascular anomalies (congenital heart disease) in neonates and infants using model-based iterative reconstruction (MBIR) algorithm compared with hybrid iterative reconstruction (HIR) and filtered back projection (FBP) reconstructions on axial computed tomography (CT) performed at minimum scanner dose. MATERIALS AND METHODS: Over 1 year, all CT angiographies performed in infants below 3 months of age with congenital heart disease were assessed retrospectively...
March 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28221262/recent-advances-in-computed-tomographic-technology-cardiopulmonary-imaging-applications
#14
Azadeh Tabari, Roberto Lo Gullo, Venkatesh Murugan, Alexi Otrakji, Subba Digumarthy, Mannudeep Kalra
Cardiothoracic diseases result in substantial morbidity and mortality. Chest computed tomography (CT) has been an imaging modality of choice for assessing a host of chest diseases, and technologic advances have enabled the emergence of coronary CT angiography as a robust noninvasive test for cardiac imaging. Technologic developments in CT have also enabled the application of dual-energy CT scanning for assessing pulmonary vascular and neoplastic processes. Concerns over increasing radiation dose from CT scanning are being addressed with introduction of more dose-efficient wide-area detector arrays and iterative reconstruction techniques...
March 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28220936/type-3-takayasu-arteritis-diagnosed-by-parvus-tardus-renal-doppler-signal-modulation
#15
Ural Koc
Takayasu's arteritis is known to cover the youngest age group in the etiology of secondary hypertension. The type 3 pattern is rare and involves the thoraco-abdominal aorta and its main abdominal branches. Here, we present the imaging results of a patient who had been followed up for systemic arterial hypertension and was diagnosed with Takayasu's arteritis type 3 by CT and MR angiography following bilateral detection of a parvus-tardus Doppler signal modulation in the renal arteries. We discuss the differential diagnoses that should be considered when observing a tardus-parvus Doppler signal...
February 21, 2017: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/28219370/myopericytoma-occurrence-in-the-liver-and-stomach-space-imaging-performance
#16
Zhihua Chen, Wenjie Liang
BACKGROUND: Myopericytoma is a rare and usually benign tumor, which is even rarer if it occurs in the liver and stomach space. Previous reports of myopericytoma were mostly related to its pathological manifestations, while imaging reports were rare. Here, we report the computed tomography (CT), computed tomography angiography (CTA) and magnetic resonance imaging (MRI) performance for one deep myopericytoma. CASE PRESENTATION: In this study, one deep myopericytoma in the liver and stomach space is reported...
February 20, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28218614/first-i-in-vivo-i-magnetic-particle-imaging-of-lung-perfusion-in-rats
#17
Xinyi Yedda Zhou, Kenneth Jeffris, Elaine Yu, Bo Zheng, Patrick Goodwill, Payam Nahid, Steven Conolly
Pulmonary embolism (PE), along with the closely related condition of deep vein thrombosis, affect an estimated 600,000 patients in the US per year. Untreated, PE carries a mortality rate of 30%. Because many patients experience mild or non-specific symptoms, imaging studies are necessary for definitive diagnosis of PE. Iodinated CT pulmonary angiography (CTPA) is recommended for most patients, while nuclear medicine-based ventilation/perfusion (V/Q) scans are reserved for patients in whom the use of iodine is contraindicated...
February 20, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28217390/management-of-aneurysmal-subarachnoid-hemorrhage-state-of-the-art-and-future-perspectives
#18
REVIEW
Giovanni Grasso, Concetta Alafaci, R Loch Macdonald
BACKGROUND: Aneurysmal subarachnoid hemorrhage (SAH) accounts for 5% of strokes and carries a poor prognosis. It affects around 6 cases per 100,000 patient years occurring at a relatively young age. METHODS: Common risk factors are the same as for stroke, and only in a minority of the cases, genetic factors can be found. The overall mortality ranges from 32% to 67%, with 10-20% of patients with long-term dependence due to brain damage. An explosive headache is the most common reported symptom, although a wide spectrum of clinical disturbances can be the presenting symptoms...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28216519/study-of-preoperative-3d-ct-angiography-of-uterine-artery-in-patients-with-uterine-cervical-cancer
#19
Hitoshi Fujioka, Tomoyasu Kato, Miyuki Sone, Tatsuya Horita, Shunsuke Sugawara, Shinsuke Tsukagoshi
Depiction of the fine vessel can provide useful preoperative information for patients with uterine cervical cancer. Although angiography can visualize vessels in detail, it is invasive. MR-angiography is a minimally invasive method to depict vessels, but the resolution of images is insufficient for preoperative evaluation. In this study, we used less invasive three-dimensional CT angiography (3D-CTA) and reconstructed images of adaptive iterative dose resolution 3D (AIDR 3D) with display field of view (D-FOV), which are suitable for arteries with large and small diameters, and created the fusion images...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28216343/treatment-strategy-based-on-the-natural-course-for-patients-with-spontaneous-isolated-superior-mesenteric-artery-dissection
#20
Seon-Hee Heo, Young-Wook Kim, Shin-Young Woo, Yang-Jin Park, Kwang-Bo Park, Duk-Kyung Kim
OBJECTIVE: The optimal treatment of spontaneous isolated superior mesenteric artery dissection (SISMAD) is still not known, and we sought to determine an optimal treatment strategy for patients with SISMAD based on its natural clinical course. METHODS: We retrospectively reviewed consecutive patients with SISMAD treated from 2001 through 2016. Diagnosis and angiographic type of SISMAD were determined with contrast-enhanced computed tomography (CT) scan, and the clinical features were obtained using a fixed form questionnaire...
February 16, 2017: Journal of Vascular Surgery
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