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https://www.readbyqxmd.com/read/28922543/in-vitro-and-in-vivo-degradation-of-microfiber-bioresorbable-coronary-scaffold
#1
Chi-Hung Huang, Sheng-Yang Lee, Sonida Horng, Louis-Georges Guy, Ting-Bin Yu
The degradation of Mirage Bioresorbable Microfiber Scaffold was evaluated in vitro and in vivo. The degradation in polymer molecular weight (MW), strut morphology, and integrity was accessed using gel permeation chromatography (GPC), X-ray micro-computed tomography (micro-CT) evaluation. To simulate the physiological degradation in vitro, scaffolds were deployed in silicone mock vessels connected to a peristaltic pumping system, which pumps 37°C phosphate-buffered saline (PBS, pH 7.4) at a constant rate. At various time points (30D, 60D, 90D, 180D, 270D, and 360D), the MW of microfibers decreased to 57...
September 18, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28922364/association-of-epicardial-adipose-tissue-with-serum-level-of-cystatin-c-in-type-2-diabetes
#2
Tomomi Murai, Noriko Takebe, Kan Nagasawa, Yusuke Todate, Riyuki Nakagawa, Rieko Nakano, Mari Hangai, Yutaka Hasegawa, Yoshihiko Takahashi, Kunihiro Yoshioka, Yasushi Ishigaki
OBJECTIVE: Accumulation of epicardial adipose tissue (EAT) is considered to be a cardiovascular risk factor independent from visceral adiposity, obesity, hypertension and diabetes. We explored the parameters related to EAT accumulation, aiming to clarify the novel pathophysiological roles of EAT in subjects with type 2 diabetes (T2DM). METHODS: We examined the laboratory values, including cystatinC, and surrogate markers used for evaluating atherosclerosis. EAT was measured as the sum of the adipose tissue area, obtained by plain computed tomography scans in 208 subjects with T2DM but no history of coronary artery disease...
2017: PloS One
https://www.readbyqxmd.com/read/28922191/acr-spr-str-practice-parameter-for-the-performance-of-cardiac-positron-emission-tomography-computed-tomography-pet-ct-imaging
#3
Rathan M Subramaniam, Warren R Janowitz, Geoffrey B Johnson, Martin A Lodge, Marguerite T Parisi, Mark R Ferguson, Jeffrey C Hellinger, Gregory W Gladish, Narainder K Gupta
This clinical practice parameter has been developed collaboratively by the American College of Radiology (ACR), the Society for Pediatric Radiology (SPR), and the Society of Thoracic Radiology (STR). This document is intended to act as a guide for physicians performing and interpreting positron emission tomography-computed tomography (PET/CT) of cardiac diseases in adults and children. The primary value of cardiac PET/CT imaging include evaluation of perfusion, function, viability, inflammation, anatomy, and risk stratification for cardiac-related events such as myocardial infarction and death...
September 15, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28919314/24-hour-alberta-stroke-program-early-ct-score-assessment-in-post-stroke-spasticity-development-in-patients-with-a-first-documented-anterior-circulation-ischemic-stroke
#4
Ondrej Volny, Maria Justanova, Petra Cimflova, Linda Kasickova, Ivana Svobodova, Jan Muzik, Martin Bares
BACKGROUND: Neuroanatomic substrates responsible for development of post-stroke spasticity are still poorly understood. The study is focused on identification of brain regions within the territory of the middle cerebral artery associated with spasticity development. METHODS: This is a single-center prospective cohort study of first documented anterior circulation ischemic strokes with a neurologic deficit lasting >7 days (from March 2014 to September 2016, all patients are involved in a registry)...
September 14, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28918858/coronary-ct-angiography-features-of-ruptured-and-high-risk-atherosclerotic-plaques-correlation-with-intra-vascular-ultrasound
#5
Daniel R Obaid, Patrick A Calvert, Adam Brown, Deepa Gopalan, Nick E J West, James H F Rudd, Martin R Bennett
BACKGROUND: Features of ruptured and high-risk plaque have been described on coronary computed tomography angiography (coronary CTA), but not systematically assessed against intravascular ultrasound (IVUS). We examined the ability of coronary CTA to identify IVUS defined ruptured plaque and Virtual Histology Intravascular Ultrasound (VH-IVUS) defined thin-cap fibroatheroma (TCFA). METHODS: Sixty-three patients (32 with acute coronary syndrome and 31 with stable angina) underwent coronary CTA, IVUS and VH-IVUS...
September 5, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28918837/diagnostic-value-of-noninvasive-computed-tomography-perfusion-imaging-and-coronary-computed-tomography-angiography-for-assessing-hemodynamically-significant-native-coronary-artery-lesions
#6
REVIEW
Pooja Sethi, Hemang B Panchal, Sreenivas P Veeranki, Zia Ur Rahman, Hadii Mamudu, Timir K Paul
BACKGROUND: The objective of this study is to determine the diagnostic performance of computed tomography perfusion (CTP) with and without computed tomography angiography (CTA) in assessment of hemodynamically significant coronary artery lesions in comparison to invasive fractional flow reserve (FFR). MATERIALS AND METHODS: PubMed and Cochrane Center Register of Controlled Trials from January 2010 searched through December 2014. Nine original studies were selected evaluating the diagnostic performance of CTP with and without CTA to invasive coronary angiography in evaluation of hemodynamic significance of coronary lesions (n = 951)...
September 2017: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/28917674/prognostic-value-of-risk-factors-calcium%C3%A2-score-coronary-cta-myocardial%C3%A2-perfusion-imaging-and-invasive%C3%A2-coronary-angiography-in-kidney%C3%A2-transplantation-candidates
#7
Simon Winther, My Svensson, Hanne Skou Jørgensen, Laust Dupont Rasmussen, Niels Ramsing Holm, Lars Christian Gormsen, Kirsten Bouchelouche, Hans Erik Bøtker, Per Ivarsen, Morten Bøttcher
OBJECTIVES: This study sought to perform a prospective head-to-head comparison of the predictive value of clinical risk factors and a variety of cardiac imaging modalities including coronary artery calcium score (CACS), coronary computed tomography angiography (CTA), single-photon emission computed tomography (SPECT), and invasive coronary angiography (ICA) on major adverse cardiac events (MACE) and all-cause mortality in kidney transplantation candidates. BACKGROUND: Current guidelines recommend screening for coronary artery disease in kidney transplantation candidates...
September 9, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28917157/density-of-calcium-in-the-ascending-thoracic-aorta-and-risk-of-incident-cardiovascular-disease-events
#8
Isac C Thomas, Robyn L McClelland, Erin D Michos, Matthew A Allison, Nketi I Forbang, W T Longstreth, Wendy S Post, Nathan D Wong, Matthew J Budoff, Michael H Criqui
BACKGROUND AND AIMS: The volume and density of coronary artery calcium (CAC) both independently predict cardiovascular disease (CVD) beyond standard risk factors, with CAC density inversely associated with incident CVD after accounting for CAC volume. We tested the hypothesis that ascending thoracic aorta calcium (ATAC) volume and density predict incident CVD events independently of CAC. METHODS: The Multi-Ethnic Study of Atherosclerosis (MESA) is a prospective cohort study of participants without clinical CVD at baseline...
September 7, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28916844/left-sided-breast-cancer-and-risks-of-secondary-lung-cancer-and-ischemic-heart-disease-effects-of-modern-radiotherapy-techniques
#9
Stefanie Corradini, Hendrik Ballhausen, Helmut Weingandt, Philipp Freislederer, Stephan Schönecker, Maximilian Niyazi, Cristoforo Simonetto, Markus Eidemüller, Ute Ganswindt, Claus Belka
PURPOSE: Modern breast cancer radiotherapy techniques, such as respiratory-gated radiotherapy in deep-inspiration breath-hold (DIBH) or volumetric-modulated arc radiotherapy (VMAT) have been shown to reduce the high dose exposure of the heart in left-sided breast cancer. The aim of the present study was to comparatively estimate the excess relative and absolute risks of radiation-induced secondary lung cancer and ischemic heart disease for different modern radiotherapy techniques. METHODS: Four different treatment plans were generated for ten computed tomography data sets of patients with left-sided breast cancer, using either three-dimensional conformal radiotherapy (3D-CRT) or VMAT, in free-breathing (FB) or DIBH...
September 15, 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/28916411/3d-fusion-of-coronary-ct-angiography-and-ct-myocardial-perfusion-imaging-intuitive-assessment-of-morphology-and-function
#10
Jochen von Spiczak, Robert Manka, Manoj Mannil, Sabrina Oebel, Sandra Hamada, Kai Higashigaito, Ernst Klotz, Frank Ruschitzka, Hatem Alkadhi
BACKGROUND: The objective of this work was to support three-dimensional fusion of coronary CT angiography (coronary CTA) and CT myocardial perfusion (CT-Perf) data visualizing coronary artery stenoses and corresponding stress-induced myocardial perfusion deficits for diagnostics of coronary artery disease. METHODS: Twelve patients undergoing coronary CTA/CT-Perf after heart transplantation were included (56 ± 12 years, all males). CT image quality was rated. Coronary diameter stenoses >50% were documented for coronary CTA...
September 5, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28916241/relationship-of-echocardiographic-epicardial-fat-thickness-and-epicardial-fat-volume-by-computed-tomography-with-coronary-artery-calcification-data-from-the-caesar-study
#11
Byung Jin Kim, Jung Gyu Kang, Sung Ho Lee, Jong Young Lee, Ki Chul Sung, Bum Soo Kim, Jin Ho Kang
BACKGROUND AND AIMS: No study has assessed the association between echocardiographic epicardial fat thickness (EFT) and computed tomography (CT)-based epicardial fat volume (EFV) and coronary artery calcification. The aim of this study is to evaluate the association between EFT and EFV and coronary artery calcification. METHODS: Among the 2,299 individuals enrolled in the CArdiometabolic risk, Epicardial fat, and Subclinical Atherosclerosis Registry (CAESAR) study, 2,276 (1,851 men; mean age 45 ± 8...
September 12, 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/28915208/appropriate-use-criteria-for-cardiac-computed-tomography-impact-on-diagnostic-utility
#12
Karan Bami, Manuja Premaratne, Jasmine Lamba, Yeung Yam, Alomgir Hossain, Marissa Keenan, Tony Haddad, Saipriya Anand, Ian G Burwash, Terrence D Ruddy, Girish Dwivedi, Benjamin J W Chow
BACKGROUND: Appropriate Use Criteria (AUC) guidelines for cardiac computed tomography (CCT) were developed to limit testing to reasonable clinical settings. However, significant testing is still done for inappropriate indications. This study investigates the impact of AUC on evaluability of CCT to determine if inappropriate tests result in a greater proportion of nondiagnostic results. METHODS: Investigators reviewed the medical records of 2417 consecutive patients who underwent CCT at the University of Ottawa Heart Institute...
September 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28914973/comparison-of-mid-to-long-term-clinical-outcomes-between-anatomical-testing-and-usual-care-in-patients-with-suspected-coronary-artery-disease-a-meta-analysis-of-randomized-trials
#13
In-Chang Hwang, Sol Ji Choi, Ji Eun Choi, Eun-Bi Ko, Jae Kyung Suh, Insun Choi, Hyun-Jae Kang, Yong-Jin Kim, Joo Youn Kim
BACKGROUND: Controversies remain regarding clinical outcomes following initial strategies of coronary computed tomography angiography (CCTA) vs usual care with functional testing in patients with suspected coronary artery disease (CAD). HYPOTHESIS: CCTA as initial diagnostic strategy results in better mid- to long-term outcomes than usual care in patients with suspected CAD. METHODS: We searched PubMed, Embase, and Cochrane Library for randomized controlled trials comparing clinical outcomes during ≥6 months' follow-up between initial anatomical testing by CCTA vs usual care with functional testing in patients with suspected CAD...
September 15, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28914752/ct-attenuation-of-pericoronary-adipose-tissue-in-normal-versus-atherosclerotic-coronary-segments-as-defined-by-intravascular-ultrasound
#14
Mohamed Marwan, Michaela Hell, Annika Schuhbäck, Sören Gauss, Daniel Bittner, Tobias Pflederer, Stephan Achenbach
BACKGROUND: The factors influencing genesis of atherosclerosis at specific regions within the coronary arterial system are currently uncertain. Local mechanical factors such as shear stress as well as metabolic factors, including inflammatory mediators released from epicardial fat, have been proposed. We analyzed computed tomographic (CT) attenuation of pericoronary adipose tissue in normal versus atherosclerotic coronary segments as defined by intravascular ultrasound (IVUS). PATIENTS AND METHODS: We evaluated the data sets of 29 patients who were referred for invasive coronary angiography and in whom IVUS of 1 coronary vessel was performed for clinical reasons...
September 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28914747/appropriate-use-criteria-for-cardiac-computed-tomography-does-computed-tomography-have-incremental-value-in-all-appropriate-use-criteria-categories
#15
Fernanda Erthal, Manuja Premaratne, Yeung Yam, Li Chen, Jasmine Lamba, Marissa Keenan, Tony Haddad, Kishu Pharasi, Saipriya Anand, Rob S Beanlands, Ian G Burwash, Girish Dwivedi, Terrence D Ruddy, Benjamin J W Chow
PURPOSE: Cardiac imaging expenditures have come under scrutiny, and a focus on appropriate use criteria (AUC) has arisen to ensure cost-effective resource utilization. Although AUC has been developed by clinical experts, it has not undergone rigorous quality assurance testing to ensure that inappropriate indications for testing yield little clinical benefit. The objective of the study was to evaluate the potential incremental prognostic value of coronary computed tomographic angiography (CCTA) in the different AUC categories...
September 13, 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28914744/cardiac-computed-tomography-before-and-after-cardiac-surgery
#16
Fernanda Erthal, Joao R Inacio, Samir Hazra, Vincent Chan, Benjamin J W Chow
Cardiac computed tomography angiography (CCTA) is a noninvasive imaging technique that has been rapidly adopted into clinical practice. Over the past decade, technological advances have improved CCTA accuracy, and there is an increasing amount of data supporting its prognostic value in the assessment of coronary artery disease. Recently, "appropriate use criteria" has been used as a tool to minimize inappropriate testing and reduce patient exposure to unnecessary risk and inconclusive studies. This review will summarize the appropriate uses of CCTA in patients before and after cardiac surgery...
September 13, 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28911512/cardioprotective-effects-of-hsp72%C3%A2-administration-on-ischemia-reperfusion-injury
#17
Takashi Tanimoto, Missag H Parseghian, Takehiro Nakahara, Hideki Kawai, Navneet Narula, Dongbin Kim, Robert Nishimura, Richard H Weisbart, Grace Chan, Richard A Richieri, Nezam Haider, Farhan Chaudhry, Glenn T Reynolds, John Billimek, Francis G Blankenberg, Partho P Sengupta, Artiom D Petrov, Takashi Akasaka, H William Strauss, Jagat Narula
BACKGROUND: Although early reperfusion is the most desirable intervention after ischemic myocardial insult, it may add to damage through oxidative stress. OBJECTIVES: This study investigated the cardioprotective effects of a single intravenous dose of heat shock protein-72 (HSP72) coupled to a single-chain variable fragment (Fv) of monoclonal antibody 3E10 (3E10Fv) in a rabbit ischemia-reperfusion model. The Fv facilitates rapid transport of HSP72 into cells, even with intact membranes...
September 19, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28910264/estimation-and-comparison-of-the-radiation-effective-dose-during-coronary-computed-tomography-angiography-examinations-on-single-source-64-mdct-and-dual-source-128-mdct
#18
Daryoush Khoramian, Soroush Sistani
GOAL: To estimate and compare the radiation dose associated with coronary computed tomography angiography (CCTA) examinations on two multi-detector CT scanners (MDCT), 64-MDCT and 128-MDCT, in daily practice. METHODS: Scan parameters of 90 patients undergoing retrospective electrocardiographic gating spiral CCTA exam were recorded during a period on a single-source 64-MDCT and a dual-source 128-MDCT, and average scan parameters were derived that were used for dosimetry...
September 14, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28906380/syntax-score-based-on-coronary-computed-tomography-angiography-may-have-a-prognostic-value-in-patients-with-complex-coronary-artery-disease-an-observational-study-from-a-retrospective-cohort
#19
Young Joo Suh, Kyunghwa Han, Suyon Chang, Jin Young Kim, Dong Jin Im, Yoo Jin Hong, Hye-Jeong Lee, Jin Hur, Young Jin Kim, Byoung Wook Choi
The SYNergy between percutaneous coronary intervention with TAXus and cardiac surgery (SYNTAX) score is an invasive coronary angiography (ICA)-based score for quantifying the complexity of coronary artery disease (CAD). Although the SYNTAX score was originally developed based on ICA, recent publications have reported that coronary computed tomography angiography (CCTA) is a feasible modality for the estimation of the SYNTAX score.The aim of our study was to investigate the prognostic value of the SYNTAX score, based on CCTA for the prediction of major adverse cardiac and cerebrovascular events (MACCEs) in patients with complex CAD...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28902766/future-cardiac-events-in-patients-with-ischemic-ecg-changes-during-adenosine-infusion-as-a-myocardial-stress-agent-and-normal-cardiac-scan
#20
Hamid Amer, Khalid Niaz, Jun Hatazawa, Ahmed Gasmelseed, Hussain Al Samiri, Maram Al Othman, Mai Al Hammad
BACKGROUND: We sought to determine the prognostic importance of adenosine-induced ischemic ECG changes in patients with normal single-photon emission computed tomography myocardial perfusion images (MPI). PATIENTS AND METHODS: We carried out a retrospective analysis of 765 patients undergoing adenosine MPI between January 2013 and January 2015. Patients with baseline ECG abnormalities and/or abnormal scan were excluded. RESULTS: Overall, 67 (8...
September 11, 2017: Nuclear Medicine Communications
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