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Coronary tomography

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https://www.readbyqxmd.com/read/27926579/the-influence-of-coronary-plaque-morphology-assessed-by-optical-coherence-tomography-on-final-microvascular-function-after-stenting-in-patients-with-st-elevation-myocardial-infarction
#1
Giovanni L De Maria, Niket Patel, Mathias Wolfrum, Gregor Fahrni, George Kassimis, Italo Porto, Sam Dawkins, Robin P Choudhury, John C Forfar, Bernard D Prendergast, Keith M Channon, Rajesh K Kharbanda, Hector M Garcia-Garcia, Adrian P Banning
OBJECTIVES: The index of microcirculatory resistance (IMR) provides a reproducible assessment of the status of coronary microvasculature in patients with ST-elevation myocardial infarction (STEMI). Frequency-domain optical coherence tomography (FD-OCT) enables detailed assessment of the morphology of coronary plaque.We sought to determine the influence of the initial culprit coronary plaque anatomy within the infarct-related artery on IMR after stenting in STEMI. PATIENTS AND METHODS: In 25 STEMI patients IMR was measured immediately before and after stent implantation...
December 6, 2016: Coronary Artery Disease
https://www.readbyqxmd.com/read/27924174/feasibility-study-of-computational-fluid-dynamics-simulation-of-coronary-computed-tomography-angiography-based-on-dual-source-computed-tomography
#2
Jing Lu, Jie Yu, Heshui Shi
BACKGROUND: Adding functional features to morphological features offers a new method for non-invasive assessment of myocardial perfusion. This study aimed to explore technical routes of assessing the left coronary artery pressure gradient, wall shear stress distribution and blood flow velocity distribution, combining three-dimensional coronary model which was based on high resolution dual-source computed tomography (CT) with computational fluid dynamics (CFD) simulation. METHODS: Three cases of no obvious stenosis, mild stenosis and severe stenosis in left anterior descending (LAD) were enrolled...
January 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/27923390/the-rapid-ctca-trial-rapid-assessment-of-potential-ischaemic-heart-disease-with-ctca-a-multicentre-parallel-group-randomised-trial-to-compare-early-computerised-tomography-coronary-angiography-versus-standard-care-in-patients-presenting-with-suspected-or-confirmed
#3
Alasdair J Gray, Carl Roobottom, Jason E Smith, Steve Goodacre, Katherine Oatey, Rachel O'Brien, Robert F Storey, Lumine Na, Steff C Lewis, Praveen Thokala, David E Newby
BACKGROUND: Emergency department attendances with chest pain requiring assessment for acute coronary syndrome (ACS) are a major global health issue. Standard assessment includes history, examination, electrocardiogram (ECG) and serial troponin testing. Computerised tomography coronary angiography (CTCA) enables additional anatomical assessment of patients for coronary artery disease (CAD) but has only been studied in very low-risk patients. This trial aims to investigate the effect of early CTCA upon interventions, event rates and health care costs in patients with suspected/confirmed ACS who are at intermediate risk...
December 7, 2016: Trials
https://www.readbyqxmd.com/read/27922808/vascular-assessment-for-transcatheter-aortic-valve-replacement-intravascular-ultrasound-compared-with-computed-tomography
#4
Essa Essa, Nader Makki, Peter Bittenbender, Quinn Capers, Barry George, Gregory Rushing, Juan Crestanello, Konstantinos Dean Boudoulas, Scott M Lilly
BACKGROUND: Assessment of the femoral and iliac arteries is essential prior to transcatheter aortic valve replacement (TAVR). It is critical for establishing candidacy for a femoral approach, and can help predict vascular complications. Although computed tomography angiography (CTA) is the standard imaging modality, it has limitations. OBJECTIVE: This study compared CTA with intravascular ultrasound (IVUS) in patients undergoing TAVR evaluation. METHODS: Fifteen patients undergoing pre-TAVR coronary angiography and hemodynamic assessment were recruited...
December 2016: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/27922522/chronic-kidney-disease-predicts-coronary-plaque-vulnerability-an-optical-coherence-tomography-study
#5
Jiannan Dai, Lei Xing, Jingbo Hou, Haibo Jia, Sining Hu, Jinwei Tian, Lin Lin, Lulu Li, Yinchun Zhu, Gonghui Zheng, Shaosong Zhang, Bo Yu, Ik-Kyung Jang
OBJECTIVE: The addition of cystatin C to creatinine in calculating the estimated glomerular filtration rate (eGFR) is known to improve the risk prediction for cardiovascular events. We sought to investigate the associations between eGFRs calculated by three Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations and coronary plaque phenotype by optical coherence tomography. PATIENTS AND METHODS: We analyzed 181 nonculprit plaques from 116 coronary artery disease patients...
December 2, 2016: Coronary Artery Disease
https://www.readbyqxmd.com/read/27920858/beware-of-positive-pressure-coronary-artery-air-embolism-following-percutaneous-lung-biopsy
#6
Dmitriy N Kazimirko, William B Beam, Khalid Saleh, Akash M Patel
Patients undergoing percutaneous lung biopsy are at risk of developing a systemic air embolism. Air embolism may manifest as a catastrophic iatrogenic event with ischemic insult to the end organs, with sites of least resistance such as coronary and cerebral circulation the most susceptible. We review the available literature and present a case of iatrogenic air embolism during computed tomography guided percutaenous lung biopsy under general anesthesia. Management, outcome, and periprocedural factors that may have contributed to the complication are discussed...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27919158/maximal-pericoronary-adipose-tissue-thickness-is-associated-with-hypertension-in-nonobese-patients-with-acute-or-chronic-illness
#7
Shinhae Chang, Wangjin Lee, Byounggyu Kwag, Yun Hee Chung, In Sook Kang
Background/Aims: Recent studies have shown an association of epicardial fat thickness with diabetes and hypertension (HTN) in asymptomatic populations. However, there is lack of information as to whether there is similar association between pericoronary adipose tissue (PAT) and HTN in the patients who have acute or chronic illness. Methods: This study included 214 nonobese patients hospitalized with acute or chronic noncardiogenic illness. PAT thicknesses were measured from fat tissues surrounding left and right coronary arteries in enhanced, chest computed tomography scans, yielding the maximal PAT value from left and right coronary arteries was used for analysis...
December 6, 2016: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/27919091/cardiovascular-magnetic-resonance-and-single-photon-emission-computed-tomography-in-suspected-coronary-heart-disease
#8
John P Greenwood, Bernhard A Herzog, Julia M Brown, Colin C Everett, Sven Plein
No abstract text is available yet for this article.
December 6, 2016: Annals of Internal Medicine
https://www.readbyqxmd.com/read/27919090/cardiovascular-magnetic-resonance-and-single-photon-emission-computed-tomography-in-suspected-coronary-heart-disease
#9
Adetola Ladejobi, Erik B Schelbert
No abstract text is available yet for this article.
December 6, 2016: Annals of Internal Medicine
https://www.readbyqxmd.com/read/27916431/2016-scct-str-guidelines-for-coronary-artery-calcium-scoring-of-noncontrast-noncardiac-chest-ct-scans-a-report-of-the-society-of-cardiovascular-computed-tomography-and-society-of-thoracic-radiology
#10
Harvey S Hecht, Paul Cronin, Michael J Blaha, Matthew J Budoff, Ella A Kazerooni, Jagat Narula, David Yankelevitz, Suhny Abbara
The Society of Cardiovascular Computed Tomography (SCCT) and the Society of Thoracic Radiology (STR) have jointly produced this document. Experts in this subject have been selected from both organizations to examine subject-specific data and write this guideline in partnership. A formal literature review, weighing the strength of evidence has been performed. When available, information from studies on cost was considered. Computed tomography (CT) acquisition, CAC scoring methodologies and clinical outcomes are the primary basis for the recommendations in this guideline...
November 10, 2016: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/27916243/safe-reentry-for-false-aneurysm-operations-in-high-risk-patients
#11
Gian Luca Martinelli, Attilio Cotroneo, Philippe Primo Caimmi, Gabriele Musica, David Barillà, Edmond Stelian, Angelo Romano, Eugenio Novelli, Luca Renzi, Marco Diena
BACKGROUND: In the absence of a standardized safe surgical reentry strategy for high-risk patients with large or anterior postoperative aortic false aneurysm (PAFA), we aimed to describe an effective and safe approach for such patients. METHODS: We prospectively analyzed patients treated for PAFA between 2006 and 2015. According to the preoperative computed tomography scan examination, patients were divided into two groups according to the anatomy and extension of PAFA: in group A, high-risk PAFA (diameter ≥3 cm) developed in the anterior mediastinum; in group B, low-risk PAFA (diameter <3 cm) was situated posteriorly...
December 1, 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27914496/computed-tomography-derived-skeletal-muscle-index-a-novel-predictor-of-frailty-and-hospital-length-of-stay-after-transcatheter-aortic-valve-replacement
#12
Vishal Dahya, Jingjie Xiao, Carla M Prado, Penny Burroughs, Dan McGee, Aline C Silva, Julian E Hurt, Shafi G Mohamed, Thomas Noel, Wayne Batchelor
: To determine the prevalence of low skeletal muscle mass in patients undergoing transcatheter aortic valve replacement (TAVR) and whether skeletal muscle mass measured from preoperative computed tomography (CT) images provides value in predicting postoperative length of stay (LOS). BACKGROUND: There are limited data on the use of body composition as a frailty measure in TAVR patients and no studies have determined if this measure predicts LOS. METHODS: We studied 104 consecutive patients who underwent TAVR at Tallahassee Memorial Hospital from 2012 to 2016...
December 2016: American Heart Journal
https://www.readbyqxmd.com/read/27914007/evaluation-of-68-ga-labeled-peptide-tracer-for-detection-of-gelatinase-expression-after-myocardial-infarction-in-rat
#13
Max Kiugel, Ville Kytö, Tiina Saanijoki, Heidi Liljenbäck, Olli Metsälä, Mia Ståhle, Johanna Tuomela, Xiang-Guo Li, Pekka Saukko, Juhani Knuuti, Anne Roivainen, Antti Saraste
BACKGROUND: Matrix metalloproteinases 2 and 9 (MMP-2/9) play a role in extracellular matrix remodeling after an ischemic myocardial injury. We evaluated (68)Ga-DOTA-peptide targeting MMP-2/9 for the detection of gelatinase expression after myocardial infarction (MI) in rat. METHODS: Rats were injected with 43 ± 7.7 MBq of (68)Ga-DOTA-peptide targeting MMP-2/9 at 7 days (n = 7) or 4 weeks (n = 8) after permanent coronary ligation or sham operation (n = 5 at both time points) followed by positron emission tomography (PET)...
December 2, 2016: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/27913900/bone-mineral-density-of-extremities-is-associated-with-coronary-calcification-and-biopsy-verified-vascular-calcification-in-living-donor-renal-transplant-recipients
#14
Zhimin Chen, Jia Sun, Mathias Haarhaus, Peter Barany, Lars Wennberg, Jonaz Ripsweden, Torkel B Brismar, Bengt Lindholm, Annika Wernerson, Magnus Söderberg, Peter Stenvinkel, Abdul Rashid Qureshi
Chronic kidney disease (CKD) mineral and bone disorders (CKD-MBD) may lead to low bone mineral density (BMD) and vascular calcification (VC), but links to the latter are unclear. Here we investigated associations between BMD, coronary artery calcium (CAC) scores, and histological signs of VC in end-stage renal disease (ESRD) patients undergoing living-donor kidney transplantation (LD-Rtx). In 66 ESRD patients (median age 45 years, 68% males), BMD (by dual-energy X-ray absorptiometry, DXA), CAC score (by computed tomography, CT; n = 54), and degree of VC score (graded by histological examination of epigastric artery specimens collected at LD-Rtx; n = 55) were assessed at the time of LD-Rtx...
December 2, 2016: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/27910111/cystatin-c-and-epicardial-adipose-tissue-as-noninvasive-predictors-of-cardiovascular-risk-in-acromegaly
#15
Anna Aulinas, Iris Crespo, David Viladés, Ruben Leta, Eulàlia Urgell, Betina Biagetti, Susan M Webb, Elena Valassi
BACKGROUND: Acromegaly (ACRO) is associated with elevated cardiovascular risk, although the prevalence of coronary artery disease (CAD) is unclear. Increased epicardial adipose tissue (EAT) and elevated cystatin-C (Cys-C) levels are cardiovascular risk factors, also related to the progression of CAD in several populations. AIMS: To measure the severity and extent of CAD in patients with ACRO and to determine whether either EAT or Cys-C reflect higher cardiovascular risk in patients with ACRO than in healthy controls...
November 7, 2016: Clinical Endocrinology
https://www.readbyqxmd.com/read/27909513/assessment-of-sinoatrial-node-function-in-patients-with-persistent-and-long-standing-persistent-forms-of-atrial-fibrillation-after-maze-iii-procedure-combined-with-mitral-valve-operation
#16
Kulikov Aleksei A, Bokeria Leo A
RESEARCH OBJECTIVE: Assessment of sinoatrial node function after Maze III procedure combined with a mitral valve operation. METHODS: 100 patients were included in the research with persistent and long-standing persistent forms of atrial fibrillation (AF) and need of operative treatment concerning valve disease. The following preoperative preparation methods were executed to all patients: Electrocardiogram in 12 standard assignments;Two-dimensional echocardiographic with assessment of systolic and diastolic functions of the left ventricle, size of the left atrium and grade of valve disease;Transesophageal echocardiography for exclusion of blood clots in the left atrium and left atrial appendage;Coronary angiography for exclusion of coronary heart disease;Computer tomography for examination of cardiac chambers and anatomic characteristics of pulmonary veins...
June 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27909290/highly-sensitive-detection-of-minimal-cardiac-ischemia-using-positron-emission-tomography-imaging-of-activated-platelets
#17
Melanie Ziegler, Karen Alt, Brett M Paterson, Peter Kanellakis, Alex Bobik, Paul S Donnelly, Christoph E Hagemeyer, Karlheinz Peter
A reliable method for the diagnosis of minimal cardiac ischemia would meet a strong demand for the sensitive diagnosis of coronary artery disease in cardiac stress testing and risk stratification in patients with chest pain but unremarkable ECGs and biomarkers. We hypothesized that platelets accumulate early on in ischemic myocardium and a newly developed technology of non-invasive molecular PET imaging of activated platelets can thus detect minimal degrees of myocardial ischemia. To induce different degrees of minimal cardiac ischemia, the left anterior descending artery (LAD) was ligated for 10, 20 or 60 min...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27909282/-coronary-artery-revascularization-with-v-composite-saphenous-veins-graft-in-a-bad-ascending-aorta-report-of-a-case
#18
Makoto Shirakawa, Yosuke Ishii, Yasuhiro Kawase, Shunichiro Sakamoto, Yasuo Miyagi, Tetsuro Morota, Takashi Nitta
A 77-year-old male with many comorbidities underwent off pump coronary artery bypass grafting. A severely atherosclerotic ascending aorta was revealed by preoperative computed tomography(CT) and epiaortic echography during operation. Therefore, V-composite saphenous vein grafting was adopted for non left anterior descending artery (LAD) coronary lesions in addition to left internal thoracic artery-left anterior descending artery bypass grafting. He was discharged with no complications and all grafts were confirmed to be patent by postoperative CT...
December 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/27909280/-cardiac-failure-developing-eleven-years-after-coronary-artery-bypass-grafting-report-of-a-case
#19
Shingo Taguchi, Takashi Hachiya, Katsuhisa Onoguchi, Makoto Hanai, Makoto Sumi, Masataka Yamazaki, Masahito Yamashiro
We report a rare case of cardiac failure for intrapericardial hematoma 11 years after coronary artery bypass grafting. A 59-year-old man was admitted to our hospital with cardiac tamponade. Echocardiography and computed tomography scan showed severe compression of the left ventricle(LV) by a large mass sized about 5×8 cm. Coronary angiography showed total occlusion at circumflex branch (Cx) #11. The mass was diagnosed with intrapericardial hematoma. We performed removal of hematoma in the pericardial cavity, and removed hematoma had 126 g...
December 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/27909273/-minimally-invasive-coronary-artery-bypass-grafting-using-bilateral-in-situ-internal-thoracic-arteries
#20
Akihiko Yamauchi, Masaki Tabuchi, Shinya Terada, Keita Kikuchi
A 73-year-old male with diabetes mellitius was referred to our hospital for coronary artery bypass grafting (CABG). Preoperative coronary angiography revealed three-vessel coronary disease. Minimally invasive coronary artery grafting (MICS CABG) via left thoracotomy was selected to decrease surgical site infection due to severe diabetes. In situ bilateral internal thoracic arteries (BITA) were harvested using a long type Harmonic scalpel. In situ right internal thorac artery( RITA)-left anterior descending artery (LAD), in situ left internal thorac artery( LITA)-high lateral branch (HL), and aorta-saphenous vein graft (SVG)-#4 posterior descending artery were performed...
December 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
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