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Coronary tomography

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https://www.readbyqxmd.com/read/28820653/fibrous-skeleton-of-the-heart-anatomic-overview-and-evaluation-of-pathologic-conditions-with-ct-and-mr-imaging
#1
Farhood Saremi, Damián Sánchez-Quintana, Shumpei Mori, Horia Muresian, Diane E Spicer, Cameron Hassani, Robert H Anderson
The fibrous skeleton is concentrated at the base of the ventricular mass. It provides electrical insulation at the atrioventricular level and fibrous continuity for the leaflets of the mitral, aortic, and tricuspid valves. Its components include the fibrous trigones, the fibrous area of aortic-mitral continuity, the subvalvar collar of the mitral valve, the membranous septum, the interleaflet triangles, the tendon of Todaro, and likely the conus ligament. The majority of the mitral annulus is fibrous, but the only true fibrous part of the tricuspid annulus is where the valvar leaflets are attached to the central fibrous body...
August 18, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28818410/optical-coherence-tomography-guided-percutaneous-coronary-intervention
#2
REVIEW
Francis J Ha, Joel P Giblett, Nitesh Nerlekar, James D Cameron, Ian T Meredith, Nick E J West, Adam J Brown
Optical coherence tomography (OCT) is an increasingly available intracoronary imaging modality that provides high-resolution imaging of coronary arteries. Its fundamental reliance on the emission and reflection of light enables rapid data acquisition without compromise of image resolution. As such, OCT can inform operators planning percutaneous coronary intervention (PCI) by accurately defining luminal geometry and detailing plaque composition. Following PCI, OCT imaging delivers a thorough assessment of the treated arterial segment and can identify specific features not always visible on alternate imaging modalities, including stent edge-related dissection, plaque tissue prolapse, incomplete stent apposition and the presence of intra-coronary thrombus...
August 4, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28817814/cardiac-computed-tomography-angiographic-findings-as-predictors-of-late-heart-failure-in-an-asymptomatic-diabetic-cohort-an-8-year-prospective-follow-up-study
#3
David A Halon, Jubran Ayman, Ronen Rubinshtein, Barak Zafrir, Mali Azencot, Basil S Lewis
OBJECTIVES: Predictive models for heart failure (HF) in heterogeneous populations have had limited success. We examined cardiac computed tomography angiography (CTA) predictors of HF or cardiovascular death (HF-CVD) in a prospective study of asymptomatic diabetics undergoing baseline assessment by CTA. METHODS: The subjects (n = 735, aged 55-74 years, 51.2% women) had no clinical history of cardiovascular disease at study entry. Coronary artery calcium (CAC) score, CTA-defined coronary atherosclerosis, cardiac chamber volumes, and clinical data were collected and late outcome events recorded over 8...
August 18, 2017: Cardiology
https://www.readbyqxmd.com/read/28817662/single-scan-rest-stress-imaging-with-99mtc-sestamibi-and-cadmium-zinc-telluride-based-spect-for-hyperemic-flow-quantification-a-feasibility-study-evaluated-with-cardiac-magnetic-resonance-imaging
#4
Yu-Hua Dean Fang, Yuan-Chang Liu, Kung-Chu Ho, Feng-Cheng Kuo, Ching-Fang Yang, Tzu-Chen Yen, I-Chang Hsieh
INTRODUCTION: We aimed to evaluate whether the hyperemic myocardial blood flow (MBF) can be estimated using cadmium zinc telluride (CZT)-based single-photon emission computed tomography (SPECT) cameras with a single, rapid rest/stress dynamic scan. Dynamic contrast-enhanced (DCE) cardiac magnetic resonance imaging (MRI) was used as a reference modality for flow measurement. MATERIALS AND METHODS: The proposed protocol included both the rest and stress acquisitions within a 24-min scan...
2017: PloS One
https://www.readbyqxmd.com/read/28817459/relation-between-epicardial-fat-and-subclinical-atherosclerosis-in-asymptomatic-individuals
#5
Rami M Abazid, Osama A Smettei, Mohammad Obadah Kattea, Sawsan Sayed, Hanaa Saqqah, Adel M Widyan, Maksymilian P Opolski
PURPOSE: Excessive quantity of epicardial adipose tissue (EAT) is considered a risk factor for coronary artery disease (CAD). There are limited data, however, on the relationship between the quality of EAT and CAD. We investigated the association between the density and volume of EAT and subclinical CAD defined by positive coronary artery calcification (CAC), using computed tomography (CT). MATERIALS AND METHODS: We reviewed 609 consecutive CT scans of patients with a mild to moderate risk for CAD to assess the EAT volume, which was measured manually by tracing the parietal pericardial sac on axial images...
August 16, 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28815291/prognostic-value-of-atherosclerotic-burden-and-coronary-vascular-function-in-patients-with-suspected-coronary-artery-disease
#6
Roberta Assante, Wanda Acampa, Emilia Zampella, Parthiban Arumugam, Carmela Nappi, Valeria Gaudieri, Ciro Gabriele Mainolfi, Mariarosaria Panico, Mario Magliulo, Christine M Tonge, Mario Petretta, Alberto Cuocolo
PURPOSE: To evaluate the prognostic value of coronary atherosclerotic burden, assessed by coronary artery calcium (CAC) score, and coronary vascular function, assessed by coronary flow reserve (CFR) in patients with suspected coronary artery disease (CAD). METHODS: We studied 436 patients undergoing hybrid (82)Rb positron emission tomography/computed tomography imaging. CAC score was measured according to the Agatston method, and patients were categorized into three groups (0, <400, and ≥400)...
August 16, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28814447/acute-myocarditis-secondary-to-cardiac-tuberculosis
#7
Alice Cowley, Laura Dobson, John Kurian, Christopher Saunderson
Isolated myocardial involvement in tuberculosis is exceedingly rare but there are reports it can present with sudden cardiac death, atrioventricular block, ventricular arrhythmias or congestive cardiac failure. We report the case of a 33 year-old male, of South Asian descent, who presented with chest pain, shortness of breath and an abnormal ECG. The patient had no significant past medical history and coronary angiogram showed no evidence of coronary artery disease. Of note the patient had recently been discharged from a local district hospital with an episode of myocarditis...
August 16, 2017: Echo Research and Practice
https://www.readbyqxmd.com/read/28814172/novel-endovascular-management-of-proximal-type-a-debakey-ii-aortic-dissection-with-a-patent-foramen-ovale-occluder
#8
Xun Yuan, Andreas Mitsis, David Mozalbat, Christoph A Nienaber
PURPOSE: To present a novel endovascular management option that avoids open surgery in selected patients with subacute type A aortic dissection (DeBakey II). CASE REPORT: A 75-year-old woman with previous infrarenal abdominal aortic aneurysm repaired in 2006 and multiple comorbidities (EURO score II 20.5%) was admitted with chest pain; computed tomography angiography (CTA) showed a new dissection in the ascending aorta just above the right coronary ostium. As the patient was considered unfit to undergo surgery, an endovascular solution was suggested after multidisciplinary team discussion...
August 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28813764/incidental-finding-of-giant-left-ventricular-aneurysm-case-report-and-literature-review
#9
Muhammad Omar, Shenjing Li, Amornpol Anuwatworn
Left ventricular aneurysms and pseudoaneurysms are complications of myocardial infarction. With advances in percutaneous coronary intervention, development of thrombolytic agents, and early initiation of treatment with angiotensin-converting enzyme inhibitors to decrease afterload and inhibit left ventricular remodeling, these complications have become much less common. Here, we report an incidental finding of a giant aneurysm of the left ventricle with associated thrombus and mural calcifications in an elderly male patient who presented to his primary care physician for abdominal pain and denied any prior coronary artery disease...
June 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28813561/comparison-of-coronary-ct-angiography-spect-pet-and-hybrid-imaging-for-diagnosis-of-ischemic-heart-disease-determined-by-fractional-flow-reserve
#10
Ibrahim Danad, Pieter G Raijmakers, Roel S Driessen, Jonathon Leipsic, Rekha Raju, Chris Naoum, Juhani Knuuti, Maija Mäki, Richard S Underwood, James K Min, Kimberly Elmore, Wynand J Stuijfzand, Niels van Royen, Igor I Tulevski, Aernout G Somsen, Marc C Huisman, Arthur A van Lingen, Martijn W Heymans, Peter M van de Ven, Cornelis van Kuijk, Adriaan A Lammertsma, Albert C van Rossum, Paul Knaapen
Importance: At present, the choice of noninvasive testing for a diagnosis of significant coronary artery disease (CAD) is ambiguous, but nuclear myocardial perfusion imaging with single-photon emission tomography (SPECT) or positron emission tomography (PET) and coronary computed tomography angiography (CCTA) is predominantly used for this purpose. However, to date, prospective head-to-head studies are lacking regarding the diagnostic accuracy of these imaging modalities. Furthermore, the combination of anatomical and functional assessments configuring a hybrid approach may yield improved accuracy...
August 16, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/28812383/evaluation-of-relationship-between-coronary-artery-status-evaluated-by-coronary-computed-tomography-angiography-and-development-of-cardiomyopathy-in-carbon-monoxide-poisoned-patients-with-myocardial-injury-a-prospective-observational-study
#11
Yong Sung Cha, Hyun Kim, Yoonsuk Lee, Woocheol Kwon, Jung-Woo Son, Hyun Youk, Hyung Il Kim, Oh Hyun Kim, Kyung Hye Park, Kyoung-Chul Cha, Kang Hyun Lee, Sung Oh Hwang
OBJECTIVES: Whether coronary artery changes are a main mechanism in the development of carbon monoxide (CO)-induced cardiomyopathy remains unknown. We investigated the effects of coronary artery stenosis on the presence or patterns of cardiomyopathy in CO-poisoned patients with myocardial injury defined as elevation of troponin I. MATERIALS AND METHODS: This prospective observational study collected data from consecutive patients who were diagnosed with CO poisoning and myocardial injury during the 24-month study period...
August 16, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28808939/comparison-of-left-ventricular-shape-by-gated-spect-imaging-in-diabetic-and-nondiabetic-patients-with-normal-myocardial-perfusion-a-propensity-score-analysis
#12
Carmela Nappi, Valeria Gaudieri, Wanda Acampa, Roberta Assante, Emilia Zampella, Ciro Gabriele Mainolfi, Mario Petretta, Guido Germano, Alberto Cuocolo
BACKGROUND: Diabetes mellitus induces structural and functional cardiac alterations that can result in heart failure. Left ventricular (LV) shape is a dynamic component of cardiac geometry influencing its contractile function. However, few data are available comparing LV shape index in diabetic and nondiabetic patients without overt coronary artery disease after balancing for coronary risk factors. METHODS: We studied 1168 patients with normal myocardial perfusion and normal LV ejection fraction on stress gated single-photon emission computed tomography (SPECT) imaging...
August 14, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28805032/improving-outcomes-after-cabg-and-pci
#13
EDITORIAL
Robert D Safian
Within 1 year of coronary artery bypass surgery , 64% of percutaneous coronary interventions were performed for graft failure and 36% for native vessel disease. Predictors of graft failure were small diameter of the graft and native vessel, poor distal run-off, and disease distal to the graft. In the near future, cardiac computed tomography angiography (CCTA) and fractional flow reserve by CT (FFRct) will incorporate accurate determination of coronary anatomy and the presence and extent of myocardial ischemia...
August 1, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28804238/percutaneous-closure-of-the-aorto-ostial-origin-of-a-coronary-artery-saphenous-bypass-graft-with-a-large-pseudoaneurysm-using-the-amplatzer-muscular-ventricular-septal-defect-occluder
#14
Nicolas W Shammas, Majid Z Chammas, Jon Robken, Dale Geiss
We report the case of a 76-year-old male patient with a history of coronary artery bypass graft surgery presented with a large pseudoaneurysm emerging from a previously occluded saphenous bypass graft (SVG). A largely contained hematoma is seen in the mediastinum on computed tomography angiography (CTA) of the chest. Flow was seen from the ascending aorta into the pseudoaneurysm through the aorto-ostial opening of the bypass graft. Closure of the aorto-ostial origin of the graft was performed using the AMPLATZER muscular ventricular septal defect (VSD) occluder (St Jude's Medical, St...
September 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/28803421/quantitative-coronary-plaque-analysis-predicts-high-risk-plaque-morphology-on-coronary-computed-tomography-angiography-results-from-the-romicat-ii-trial
#15
Ting Liu, Pál Maurovich-Horvat, Thomas Mayrhofer, Stefan B Puchner, Michael T Lu, Khristine Ghemigian, Pieter H Kitslaar, Alexander Broersen, Amit Pursnani, Udo Hoffmann, Maros Ferencik
Semi-automated software can provide quantitative assessment of atherosclerotic plaques on coronary CT angiography (CTA). The relationship between established qualitative high-risk plaque features and quantitative plaque measurements has not been studied. We analyzed the association between quantitative plaque measurements and qualitative high-risk plaque features on coronary CTA. We included 260 patients with plaque who underwent coronary CTA in the Rule Out Myocardial Infarction/Ischemia Using Computer Assisted Tomography (ROMICAT) II trial...
August 12, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28802566/alcohol-use-and-cardiovascular-disease-risk-in-patients-with-nonalcoholic-fatty-liver-disease
#16
Lisa B VanWagner, Hongyan Ning, Norrina B Allen, Veeral Ajmera, Cora E Lewis, John Jeffrey Carr, Donald M Lloyd-Jones, Norah A Terrault, Juned Siddique
BACKGROUND & AIMS: Cardiovascular disease (CVD) is the leading cause of death among patients with non-alcoholic fatty liver disease (NAFLD). Moderate drinking (vs abstinence) is associated with lower risk of CVD in the general population. We assessed whether alcohol use is associated with CVD risk in patients with NAFLD. METHODS: We analyzed data from participants in the Coronary Artery Risk Development in Young Adults longitudinal cohort study of 5115 black and white young adults, 18-30 years old, recruited from 4 cities in the United States from 1985 through 1986...
August 9, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28801799/double-versus-single-source-left-sided-coronary-revascularization-using-bilateral-internal-thoracic-artery-graft-alone
#17
Giuseppe Gatti, Gianluca Castaldi, Marco Morosin, Irena Tavcar, Manuel Belgrano, Bernardo Benussi, Gianfranco Sinagra, Aniello Pappalardo
Left-sided coronary revascularization with bilateral internal thoracic artery (BITA) graft is performed usually either with an in situ (double source) or Y-graft configuration (single source). Two hundred fifty-three (mean age, 67.1 ± 9.5 years) patients underwent isolated left-sided coronary revascularization with BITA graft alone at the present authors' institution (2000-2015). Skeletonized BITA grafts were used either in an in situ (n = 199) or Y-graft configuration (n = 54). Forty pairs were identified with the propensity score-matching...
August 11, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28800951/evaluation-of-a-high-concentrated-contrast-media-injection-protocol-in-combination-with-low-tube-current-for-dose-reduction-in-coronary-computed-tomography-angiography-a-randomized-two-center-prospective-study
#18
Yibo Sun, Yanqing Hua, Mingpeng Wang, Dingbiao Mao, Xiu Jin, Cheng Li, Kailei Shi, Jianrong Xu
RATIONALE AND OBJECTIVES: The study aimed to prospectively evaluate the radiation dose reduction potential and image quality (IQ) of a high-concentration contrast media (HCCM) injection protocol in combination with a low tube current (mAs) in coronary computed tomography angiography. MATERIALS AND METHODS: Eighty-one consecutive patients (mean age: 62 years; 34 females; body mass index: 18-31) were included and randomized-assigned into two groups. All computed tomography (CT) examinations were performed in two groups with the same tube voltage (100 kV), flow rate of contrast medium (5...
August 8, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28797768/ct-coronary-angiography-findings-in-non-atherosclerotic-coronary-artery-diseases
#19
REVIEW
Z Zhou, L Xu, N Zhang, H Wang, W Liu, Z Sun, Z Fan
Non-atherosclerotic coronary artery diseases are being increasingly recognised as causes of acute coronary events. Invasive coronary angiography frequently fails to identify the abnormalities in the proximal course of coronary arteries and coronary wall, while computed tomography coronary angiography (CTCA) allows for acquisition of more detailed information. CTCA serves as a reliable method for evaluating patients with non-atherosclerotic coronary artery diseases. The purpose of this article is to provide an overview of non-atherosclerotic abnormalities that may be demonstrated on CTCA...
August 7, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28797740/framework-for-detection-and-localization-of-coronary-non-calcified-plaques-in-cardiac-cta-using-mean-radial-profiles
#20
Muhammad Moazzam Jawaid, Atif Riaz, Ronak Rajani, Constantino Carlos Reyes-Aldasoro, Greg Slabaugh
BACKGROUND AND OBJECTIVE: The high mortality rate associated with coronary heart disease (CHD) has driven intensive research in cardiac imaging and image analysis. The advent of computed tomography angiography (CTA) has turned non-invasive diagnosis of cardiovascular anomalies into reality as calcified coronary plaques can be easily identified due to their high intensity values. However, the detection of non-calcified plaques in CTA is still a challenging problem because of lower intensity values, which are often similar to the nearby blood and muscle tissues...
August 1, 2017: Computers in Biology and Medicine
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