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https://www.readbyqxmd.com/read/28212053/transthoracic-echocardiography-pitfalls-and-limitations-as-delineated-at-cardiac-ct-and-mr-imaging
#1
Sachin B Malik, Natalie Chen, Rex A Parker, Joe Y Hsu
Transthoracic echocardiography ( TTE transthoracic echocardiography ) is a critical tool in the field of clinical cardiology. It often serves as one of the first-line imaging modalities in the evaluation of cardiac disease owing to its low cost, portability, widespread availability, lack of ionizing radiation, and ability to evaluate both anatomy and function of the heart. Consequently, a large majority of patients undergoing a cardiac computed tomography (CT) or magnetic resonance (MR) imaging examination will have a TTE transthoracic echocardiography available for review...
February 17, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28210769/preprocedural-risk-assessment-prior-to-ppvi-with-cmr-and-cardiac-ct
#2
Ladonna Malone, Brian Fonseca, Thomas Fagan, Jane Gralla, Neil Wilson, Micheal DiMaria, Uyen Truong, Lorna P Browne
Percutaneous pulmonary valve intervention (PPVI) is a less invasive and less costly approach to pulmonary valve replacement compared with the surgical alternative. Potential complications of PPVI include coronary compression and pulmonary arterial injury/rupture. The purpose of this study was to characterize the morphological risk factors for PPVI complication with cardiac MRI and cardiac CTA. A retrospective review of 88 PPVI procedures was performed. 44 patients had preprocedural cardiac MRIs or CTAs available for review...
February 16, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28205119/use-of-three-dimensional-computed-tomography-overlay-for-real-time-cryoballoon-ablation-in-atrial-fibrillation-reduces-radiation-dose-and-contrast-dye
#3
B Oude Velthuis, M Molenaar, H G Reinhart Dorman, J Y Stevenhagen, M F Scholten, J van der Palen, J M van Opstal
AIMS: Cryoballoon pulmonary vein (PV) isolation in patients with atrial fibrillation has proven to be effective in short-term and long-term follow-up. To visualise the PV anatomy, pre-ablation contrast pulmonary venography is commonly performed. Three-dimensional (3D) computed tomography (CT) overlay is a new technique creating a live 3D image of the left atrium by integrating a previously obtained CT scan during fluoroscopy. To evaluate the benefits of 3D CT overlay during cryoballoon ablation, we studied the use of 3D CT overlay versus contrast pulmonary venography in a randomised fashion in patients with paroxysmal atrial fibrillation undergoing cryoballoon PV isolation...
February 15, 2017: Netherlands Heart Journal
https://www.readbyqxmd.com/read/28205113/cardiac-pet-ct-with-rb-82-optimization-of-image-acquisition-and-reconstruction-parameters
#4
P Chilra, S Gnesin, G Allenbach, M Monteiro, J O Prior, L Vieira, J A Pires Jorge
BACKGROUND: Our aim was to characterize the influence of time-of-flight (TOF) and point spread function (PSF) recovery corrections, as well as ordered subset expectation maximization (OSEM) reconstruction parameters, in (82)Rb PET/CT quantification of myocardial blood flow (MBF) and myocardial flow reserve (MFR). Rest and stress list-mode dynamic (82)Rb PET acquisition data from 10 patients without myocardial flow defects and 10 patients with myocardial blood flow defects were reconstructed retrospectively...
December 2017: EJNMMI Physics
https://www.readbyqxmd.com/read/28203163/is-the-deep-inspiration-breath-hold-technique-superior-to-the-free-breathing-technique-in-cardiac-and-lung-sparing-while-treating-both-left-sided-post-mastectomy-chest-wall-and-supraclavicular-regions
#5
Anupama Darapu, Rajesh Balakrishnan, Patricia Sebastian, Mohamathu Rafic Kather Hussain, Paul Ravindran, Subhashini John
AIMS: To evaluate the efficacy of the deep inspirational breath-hold (DIBH) technique and its dosimetric advantages over the free breathing (FB) technique in cardiac (heart and left anterior descending artery [LAD]) and ipsilateral lung sparing in left-sided post-mastectomy field-in-field conformal radiotherapy. DIBH is highly reproducible, and this study aims to find out its dosimetric benefits over FB. MATERIALS AND METHODS: Nineteen left-sided mastectomy patients were immobilized using breast boards with both arms positioned above the head...
January 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28193640/grk2-mediates-arginine-vasopressin-induced-il-6-production-via-nf-kb-signaling-in-neonatal-rat-cardiac-fibroblast
#6
Feifei Xu, Suzhen Sun, Xiaojun Wang, Eran Ni, Lingling Zhao, Weizhong Zhu
: Elevated interleukin 6(IL-6) levels in congestive heart failure are associated with myocardial damage during acute exacerbation and with chronic inflammation. Arginine vasopressin (AVP), a hormone released in response to cardiac stress, could be a factor of inflammation and fibrosis in the pathogenesis of heart failure. Recently, we have shown that AVP promotes the proliferation of neonatal rat cardiac fibroblasts (NRCFs) through a V1Avasopressin receptor-mediated G protein-coupled receptor kinase2 (GRK2) signaling...
February 13, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28191375/self-inflicted-cardiac-injury-with-nail-gun-without-hemodynamic-compromise-a-case-report
#7
Simon Ho, Bo Liu, Nicholas Feranec
Pneumatically powered nail guns have been used in construction since 1959. Penetrating injuries to the heart with nail guns have a wide range of presentations from asymptomatic to cardiac tamponade and exsanguination. Mortality related to cardiac nail gun injuries is similar to knife injuries, estimated at 25%. Surgical exploration is the treatment of choice. We describe a case of self-inflicted nail gun injury to the chest without hemodynamic compromise in a 51-year-old man. Computed tomography (CT) imaging confirmed nail penetrating the right ventricle, with the tip adjacent to but not violating the abdominal aorta...
January 10, 2017: Curēus
https://www.readbyqxmd.com/read/28186939/cardiac-diagnostic-work-up-for-atrial-fibrillation-after-transient-ischaemic-attacks-in-england-and-wales-results-from-a-cross-sectional-survey
#8
Olivia Geraghty, Eleni Korompoki, Filippos T Filippidis, Anthony Rudd, Roland Veltkamp
OBJECTIVES: Transient ischaemic attacks (TIAs) are an important precursor of stroke. Atrial fibrillation (AF) is among the most dangerous aetiologies shared between TIAs and strokes. Detection of AF after TIAs is essential for the initiation of oral anticoagulants. We aimed to identify variations in the use of cardiac investigations used to detect AF and cardiac pathology in patients with TIA in the UK. SETTING: All TIA clinical leads in England and Wales received an invitation by email to participate in an online survey in February 2015...
November 10, 2016: BMJ Open
https://www.readbyqxmd.com/read/28185680/recurrent-pericarditis
#9
M Imazio, A Battaglia, L Gaido, F Gaita
Recurrent pericarditis is the most troublesome complication of pericarditis occurring in 15 to 30% of cases. The pathogenesis is often presumed to be immune-mediated although a specific rheumatologic diagnosis is commonly difficult to find. The clinical diagnosis is based on recurrent pericarditis chest pain and additional objective evidence of disease activity (e.g. pericardial rub, ECG changes, pericardial effusion, elevation of markers of inflammation, and/or imaging evidence of pericardial inflammation by CT or cardiac MR)...
February 6, 2017: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/28185172/-18-f-fdg-pet-ct-angiography-for-the-diagnosis-of-infective-endocarditis
#10
REVIEW
A Roque, M N Pizzi, H Cuéllar-Calàbria, S Aguadé-Bruix
PURPOSE OF REVIEW: This article reviews the current imaging role of (18)F-fluordeoxyglucose positron emission computed tomography ((18)F-FDG-PET/CT) combined with cardiac CT angiography (CTA) in infective endocarditis and discusses the strengths and limitations of this technique. RECENT FINDINGS: The diagnosis of infective endocarditis affecting prosthetic valves and intracardiac devices is challenging because echocardiography and, therefore, the modified Duke criteria have well-recognized limitations in this clinical scenario...
February 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28185169/enhancing-cardiac-pet-by-motion-correction-techniques
#11
REVIEW
Mathieu Rubeaux, Mhairi K Doris, Adam Alessio, Piotr J Slomka
PURPOSE OF REVIEW: Cardiac positron emission tomography (PET) images often contain errors due to cardiac, respiratory, and patient motion during relatively long image acquisition. Advanced motion compensation techniques may improve PET spatial resolution, eliminate potential artifacts, and ultimately improve the research and clinical capabilities of PET. RECENT FINDINGS: Combined cardiac and respiratory gating has only recently been implemented in clinical PET systems...
February 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28183285/early-detection-of-myocardial-infarction-following-blunt-chest-trauma-by-computed-tomography-a-case-report
#12
Thung-Lip Lee, Chin-Feng Hsuan, Chen-Hsiang Shih, Huai-Wen Liang, Hsing-Shan Tsai, Wei-Kung Tseng, Kwan-Lih Hsu
BACKGROUND: Blunt cardiac trauma encompasses a wide range of clinical entities, including myocardial contusion, cardiac rupture, valve avulsion, pericardial injuries, arrhythmia, and even myocardial infarction. Acute myocardial infarction due to coronary artery dissection after blunt chest trauma is rare and may be life threatening. Differential diagnosis of acute myocardial infarction from cardiac contusion at this setting is not easy. CASE PRESENTATION: Here we demonstrated a case of blunt chest trauma, with computed tomography detected myocardium enhancement defect early at emergency department...
February 10, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28178293/%C3%AE-ct-of-ex-vivo-stained-mouse-hearts-and-embryos-enables-a-precise-match-between-3d-virtual-histology-classical-histology-and-immunochemistry
#13
Christian Dullin, Roser Ufartes, Emanuel Larsson, Sabine Martin, Marcio Lazzarini, Giuliana Tromba, Jeannine Missbach-Guentner, Diana Pinkert-Leetsch, Dörthe M Katschinski, Frauke Alves
The small size of the adult and developing mouse heart poses a great challenge for imaging in preclinical research. The aim of the study was to establish a phosphotungstic acid (PTA) ex-vivo staining approach that efficiently enhances the x-ray attenuation of soft-tissue to allow high resolution 3D visualization of mouse hearts by synchrotron radiation based μCT (SRμCT) and classical μCT. We demonstrate that SRμCT of PTA stained mouse hearts ex-vivo allows imaging of the cardiac atrium, ventricles, myocardium especially its fibre structure and vessel walls in great detail and furthermore enables the depiction of growth and anatomical changes during distinct developmental stages of hearts in mouse embryos...
2017: PloS One
https://www.readbyqxmd.com/read/28177653/prognostic-value-of-stress-dynamic-myocardial-perfusion-ct-in-a-multicenter-population-with-known-or-suspected-coronary-artery-disease
#14
Felix G Meinel, Francesca Pugliese, U Joseph Schoepf, Ullrich Ebersberger, Julian L Wichmann, Gladys G Lo, Yeon Hyeon Choe, Yining Wang, Sabrina Segreto, Fabian Bamberg, Carlo N De Cecco
OBJECTIVE: The purpose of this study was to determine the prognostic value of myocardial perfusion CT for major adverse cardiac events (MACE). MATERIALS AND METHODS: Data from six centers in Asia, Europe, and North America on 144 patients with known or suspected coronary artery disease who had undergone coronary CT angiography (CCTA) and dynamic myocardial perfusion CT with a dual-source CT system were analyzed. CCTA studies were acquired at rest. Dynamic myocardial perfusion CT was performed under vasodilator stress...
February 8, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28176968/decreased-left-ventricular-stroke-volume-is-associated-with-low-grade-exercise-tolerance-in-patients-with-chronic-obstructive-pulmonary-disease
#15
Sumito Inoue, Yoko Shibata, Hiroyuki Kishi, Joji Nitobe, Tadateru Iwayama, Yoshinori Yashiro, Takako Nemoto, Kento Sato, Masamichi Sato, Tomomi Kimura, Akira Igarashi, Yoshikane Tokairin, Isao Kubota
BACKGROUND: Low-grade exercise tolerance is associated with a poor prognosis in patients with chronic obstructive pulmonary disease (COPD). The 6 min walk test (6MWT) is commonly used to evaluate exercise tolerance in patients with COPD. However, little is known regarding the relationship between cardiac function and exercise tolerance in patients with COPD. The aim of this study was to identify predictive factors in cardiac function for low-grade exercise tolerance in patients with stable COPD...
2017: BMJ Open Respiratory Research
https://www.readbyqxmd.com/read/28176182/rb-82-pet-ct-left-ventricular-mass-to-volume-ratios
#16
Andrew Van Tosh, Nathaniel Reichek, C David Cooke, Christopher J Palestro, Kenneth J Nichols
Left ventricular (LV) mass:volume ratios indexed to body size (Mi/Vi) provide risk stratification for cardiac events. We sought to determine whether Rb-82 PET mass and volume indices are similar to MRI normal values for low likelihood subjects, and whether abnormal indices are related to abnormal myocardial blood flow (MBF). Data were analyzed retrospectively for 194 patients referred for rest/stress Rb-82 PET. LV EF, volume and mass values were calculated and mass:volume ratios were indexed to patients' height and weight...
February 7, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28174196/sex-differences-in-the-performance-of-cardiac-computed-tomography-compared-with-functional-testing-in-evaluating-stable-chest-pain-subanalysis-of-the-multicenter-randomized-crescent-trial-calcium-imaging-and-selective-ct-angiography-in-comparison-to-functional
#17
Marisa Lubbers, Adriaan Coenen, Tobias Bruning, Tjebbe Galema, Jurgen Akkerhuis, Boudewijn Krenning, Paul Musters, Mohamed Ouhlous, Ahno Liem, Andre Niezen, Admir Dedic, Ron van Domburg, Miriam Hunink, Koen Nieman
BACKGROUND: Cardiac computed tomography (CT) represents an alternative diagnostic strategy for women with suspected coronary artery disease, with potential benefits in terms of effectiveness and cost-efficiency. METHODS AND RESULTS: The CRESCENT trial (Calcium Imaging and Selective CT Angiography in Comparison to Functional Testing for Suspected Coronary Artery Disease) prospectively randomized 350 patients with stable angina (55% women; aged 55±10 years), mostly with an intermediate coronary artery disease probability, between cardiac CT and functional testing...
February 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28166144/retro-orbital-breast-cardiac-skin-and-subcutaneous-metastases-of-neuroendocrine-tumor-from-a-tail-gut-cyst-on-68ga-dotatate-pet-ct-imaging
#18
Emine Acar, Hatice Durak, Sare Kabukcuoğlu, Serap Işiksoy, Gamze Çapa Kaya
Tail gut cysts are rare congenital lesions developing from postanal primitive gut remnants. They are mostly benign but carry a potential of malignant transformation, such as adenocarcinoma, neuroendocrine tumor, adenosquamous carcinoma, and pseudomyxoma peritonei. We present a 39-year-old woman with a neuroendocrine tumor arising within a tail gut cyst. She underwent complete resection in 2011. After 4 years, she was admitted with breast nodules, left proptosis, and gaze difficulties. Ga-DOTATATE PET/CT demonstrated extensive metastases including pelvic, lymph node, adrenal gland, bone, retro-orbital, cardiac, breast, skin, and subcutaneous metastases...
February 3, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28162139/clinical-application-of-three-dimensional-printing-to-the-management-of-complex-univentricular-hearts-with-abnormal-systemic-or-pulmonary-venous-drainage
#19
Eimear McGovern, Eoin Kelleher, Aisling Snow, Kevin Walsh, Bassem Gadallah, Shelby Kutty, John M Redmond, Colin J McMahon
In recent years, three-dimensional printing has demonstrated reliable reproducibility of several organs including hearts with complex congenital cardiac anomalies. This represents the next step in advanced image processing and can be used to plan surgical repair. In this study, we describe three children with complex univentricular hearts and abnormal systemic or pulmonary venous drainage, in whom three-dimensional printed models based on CT data assisted with preoperative planning. For two children, after group discussion and examination of the models, a decision was made not to proceed with surgery...
February 6, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28160263/effect-of-prolonged-fasting-and-low-molecular-weight-heparin-or-warfarin-therapies-on-2-deoxy-2-18f-fluoro-d-glucose-pet-cardiac-uptake
#20
Assuero Giorgetti, Gavino Marras, Dario Genovesi, Elena Filidei, Antonio Bottoni, Maurizio Mangione, Michele Emdin, Paolo Marzullo
BACKGROUND: Whether anticoagulants other than unfractionated heparin are able to suppress cardiac PET uptake of 2-deoxy-2-[18F]-fluoro-D-glucose (18F-FDG) is unknown. METHODS: One-hundred-seventy-four patients without history and clinical evidence of cardiac dysfunction and/or coronary heart disease underwent a 18F-FDG PET/CT study. All patients were studied with a >12-hours fasting and divided into 2 groups: group-1 without anticoagulant therapy (n:75); group-2 patients on low molecular weight heparin (n:60) or warfarin therapy (n:39)...
February 3, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
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