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Computed coronary angiography

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https://www.readbyqxmd.com/read/28433355/the-no-touch-saphenous-vein-graft-in-elderly-coronary-bypass-patients-with-multiple-comorbidities-is-a-promising-conduit-to-substitute-the-left-internal-thoracic-artery
#1
Ninos Samano, Håkan Geijer, Lennart Bodin, Mikael Arbeus, John D Mannion, Michael Dashwood, Domingos Souza
OBJECTIVES: We investigated the patency rates of no-touch saphenous vein grafts anastomosed to the left anterior descending artery compared with the left internal thoracic artery. Further, we compared the patency of no-touch vein grafts to the left anterior descending artery with the patency of no-touch vein grafts to other coronary arteries. METHODS: Of 2635 consecutive patients undergoing coronary artery bypass grafting between 2003 and 2008, 168 (6.3%) were given at least a saphenous vein graft to the left anterior descending artery to avoid harvesting complications in high-risk patients or in response to a left internal thoracic artery injury...
March 24, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28432820/the-impact-of-small-motion-on-the-visualization-of-coronary-vessels-and-lesions-in-cardiac-ct-a-simulation-study
#2
Francisco Contijoch, J Webster Stayman, Elliot R McVeigh
PURPOSE: Coronary x-ray computed tomography angiography (CCTA) is used to non-invasively assess coronary artery geometry and has, combined with computational modeling, demonstrated the potential to identify physiologically significant lesions. These measurements require robust and accurate coronary imaging and delineation of vessels in the presence of small motion. This simulation study characterizes the impact of small, uncorrected vessel drifts during data acquisition on the assessment of vessel intensity, diameter, and shape...
April 22, 2017: Medical Physics
https://www.readbyqxmd.com/read/28430739/downstream-indication-to-revascularization-following-hybrid-cardiac-pet-mri-preliminary-results
#3
Julien Priamo, Dionysos Adamopoulos, Oliver Rager, Angela Frei, Stephane Noble, David Carballo, Osman Ratib, René Nkoulou
BACKGROUND: Hybrid PET/MRI allows the acquisition of both fluorine-18-fluorodeoxyglucose (F-FDG) PET and cardiac magnetic resonance (CMR) during one session. Whether this will result in different referral to coronary revascularization (CR) is unknown. We compared this new hybrid method with all-nuclear/all-CMR methods in the assessment of viable myocardium and in downstream referral to CR. PATIENTS AND METHODS: Overall, 12 patients with rest perfusion defects on a single photon emission computed tomography (SPECT) were recruited for cardiac viability assessment using a PET/MRI device...
April 20, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28427736/interactions-between-reciprocal-st-segment-downsloping-during-st-elevated-myocardial-infarction-and-global-cardiac-perfusion-and-functional-abnormalities
#4
Riccardo Liga, Enrico Orsini, Paolo Caravelli, Marco De Carlo, Anna Sonia Petronio, Mario Marzilli
Reciprocal ST-segment downsloping on electrocardiogram is a frequent finding during ST-elevated myocardial infarction (STEMI), but its etiology is still disputed. We sought to evaluate the relation between reciprocal ST-segment downsloping during STEMI and major cardiac perfusion and functional parameters. One hundred eighty-five patients with STEMI underwent emergency coronary angiography. The presence of reciprocal ST-segment downsloping was assessed. At coronary angiography, the corrected TIMI frame count (cTFC) was computed both on culprit and remote vessels and the occurrence of "no/slow reflow" phenomenon after percutaneous coronary intervention (PCI) identified...
March 29, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28413187/noninvasive-fractional-flow-reserve-derived-from-coronary-computed-tomography-angiography%C3%A3-is-this-just-another-new-diagnostic-test-or-the-long-awaited-game-changer
#5
Hiromasa Otake, Charles A Taylor, Hitoshi Matsuo, Nobuhiro Tanaka, Takashi Akasaka
Despite the clinical importance of ischemia evaluation, obtaining fractional flow reserve (FFR) value has, heretofore, only been available during invasive cardiac catheterization. Although there is a clear linkage between morphology and physiology, a significant gap still exists. FFR derived from coronary computed tomography angiography (FFRCT) is a novel method of quantifying the hemodynamic significance of coronary artery stenoses by translating morphological information into hemodynamic data. Improved diagnostic performance of FFRCThas been repeatedly demonstrated in comparison with coronary computed tomography angiography alone with an invasive FFR reference standard...
April 11, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28413071/performance-of-ultra-low-dose-ct-for-the-evaluation-of-coronary-calcification-a-direct-comparison-with-coronary-calcium-score
#6
V V Silveira de Souza, F Soares Torres, B Hochhegger, G Watte, G Sartori, F Lucchese, B Azambuja Gonçalves
AIM: To evaluate the diagnostic performance of ultra-low-dose computed tomography (ULDCT) in comparison to standard coronary calcium score (CCS) acquisition for the evaluation of coronary artery calcification (CAC). MATERIALS AND METHODS: Standard CCS acquisition and ULDCT were performed in patients referred for coronary CT angiography for the evaluation of coronary artery disease. CAC in ULDCT was graded subjectively using a four-point scale (from 0, no calcification, to 3, severe calcification) for the complete study and for each individual coronary segment...
April 13, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28412436/noninvasive-ffr-derived-from-coronary-ct-angiography-management-and-outcomes-in-the-promise-trial
#7
Michael T Lu, Maros Ferencik, Rhonda S Roberts, Kerry L Lee, Alexander Ivanov, Elizabeth Adami, Daniel B Mark, Farouc A Jaffer, Jonathon A Leipsic, Pamela S Douglas, Udo Hoffmann
OBJECTIVES: The purpose of this study was to determine whether noninvasive fractional flow reserve derived from computed tomography (FFRCT) predicts coronary revascularization and outcomes and whether its addition improves efficiency of referral to invasive coronary angiography (ICA) after coronary computed tomography angiography (CTA). BACKGROUND: FFRCT may improve the efficiency of an anatomic CTA strategy for stable chest pain. METHODS: This observational cohort study included patients with stable chest pain in the PROMISE trial (PROspective Multicenter Imaging Study for Evaluation of Chest Pain) referred to ICA within 90 days after CTA...
April 7, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28409258/impact-of-knowledge-based-iterative-model-reconstruction-on-myocardial-late-iodine-enhancement-in-computed-tomography-and-comparison-with-cardiac-magnetic-resonance
#8
Yuki Tanabe, Teruhito Kido, Akira Kurata, Naoki Fukuyama, Takahiro Yokoi, Tomoyuki Kido, Teruyoshi Uetani, Mani Vembar, Amar Dhanantwari, Shinichi Tokuyasu, Natsumi Yamashita, Teruhito Mochizuki
We evaluated the image quality and diagnostic performance of late iodine enhancement computed tomography (LIE-CT) with knowledge-based iterative model reconstruction (IMR) for the detection of myocardial infarction (MI) in comparison with late gadolinium enhancement magnetic resonance imaging (LGE-MRI). The study investigated 35 patients who underwent a comprehensive cardiac CT protocol and LGE-MRI for the assessment of coronary artery disease. The CT protocol consisted of stress dynamic myocardial CT perfusion, coronary CT angiography (CTA) and LIE-CT using 256-slice CT...
April 13, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28407768/a-study-of-noninvasive-fractional-flow-reserve-derived-from-a-simplified-method-based-on-coronary-computed-tomography-angiography-in-suspected-coronary-artery-disease
#9
Changzheng Shi, Dong Zhang, Kunlin Cao, Tao Zhang, Liangping Luo, Xin Liu, Heye Zhang
BACKGROUND: The invasive fractional flow reserve has been considered the gold standard for identifying ischaemia-related stenosis in patients with suspected coronary artery disease. Determining non-invasive FFR based on coronary computed tomographic angiography datasets using computational fluid dynamics tends to be a demanding process. Therefore, the diagnostic performance of a simplified method for the calculation of FFRCTA requires further evaluation. OBJECTIVES: The aim of this study was to investigate the diagnostic performance of FFRCTA calculated based on a simplified method by referring to the invasive FFR in patient-specific coronary arteries and clinical decision-making...
April 14, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28406318/a-low-dose-and-an-ultra-low-dose-contrast-agent-protocol-for-coronary-ct-angiography-in-a-clinical-setting-quantitative-and-qualitative-comparison-to-a-standard-dose-protocol
#10
Dominik C Benz, Christoph Gräni, Beatrice Hirt Moch, Fran Mikulicic, Jan Vontobel, Tobias A Fuchs, Julia Stehli, Olivier F Clerc, Mathias Possner, Aju P Pazhenkottil, Oliver Gaemperli, Ronny R Buechel, Philipp A Kaufmann
OBJECTIVES: To evaluate the impact of a low-dose (LD) and an ultra-low-dose (ULD) contrast protocol for coronary computed tomography angiography (CCTA) on qualitative and quantitative image parameters in a clinical setting. METHODS: We scanned 120 consecutive patients with a 256-slice CT scanner applying a LD (60 patients, 35-55mL) or ULD (60 patients, 25-45mL) contrast protocol adapted to body mass index (BMI). Visually assessed image quality as well as attenuation measured in each coronary segment were retrospectively compared to 20 consecutive patients scanned with a normal-dose (ND, 40-105mL) contrast protocol...
April 13, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28406279/update-on-the-clinical-utility-of-coronary-computed-tomographic-angiography-in-stable-angina-pectoris
#11
Shaw H Kueh, Christopher Naoum
Over the last decade, coronary computed tomographic angiography (CCTA) has emerged as a valuable non-invasive imaging modality with excellent diagnostic performance compared to invasive coronary angiography (ICA) for identifying patients with coronary artery disease (CAD). Beyond the diagnosis of CAD, CCTA also provides valuable prognostic information. While patients with normal CCTA have excellent long-term prognosis, among those with CAD, increasing CAD extent and severity is associated with increased cardiovascular event risk over both medium- and long-term follow-up in both men and women...
June 2017: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/28405477/influence-of-adaptive-statistical-iterative-reconstruction-algorithm-on-image-quality-in-coronary-computed-tomography-angiography
#12
Helle Precht, Jesper Thygesen, Oke Gerke, Kenneth Egstrup, Dag Waaler, Jess Lambrechtsen
BACKGROUND: Coronary computed tomography angiography (CCTA) requires high spatial and temporal resolution, increased low contrast resolution for the assessment of coronary artery stenosis, plaque detection, and/or non-coronary pathology. Therefore, new reconstruction algorithms, particularly iterative reconstruction (IR) techniques, have been developed in an attempt to improve image quality with no cost in radiation exposure. PURPOSE: To evaluate whether adaptive statistical iterative reconstruction (ASIR) enhances perceived image quality in CCTA compared to filtered back projection (FBP)...
December 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/28403869/debulking-surgery-for-venous-hemangioma-arising-from-the-epicardium-report-of-a-case
#13
Daichi Shikata, Takahiro Nakagomi, Yujiro Yokoyama, Yukiko Yamada, Masato Nakajima, Toshio Oyama, Taichiro Goto
BACKGROUND: Cardiac hemangiomas are rare benign vascular tumors that can occur in any cardiac layer: endocardium, myocardium, or epicardium. Histologically, cardiac hemangiomas may be classified as capillary, cavernous, or arteriovenous; venous hemangiomas are extremely rare. CASE PRESENTATION: A 46-year-old man reported experiencing precordial discomfort. Computed tomography revealed a massive tumor adjacent to the right ventricle. The right coronary artery was found to be located at the center of the tumor...
April 12, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28400923/significance-of-inferior-wall-ischemia-in-non-dominant-right-coronary-artery-anatomy
#14
Ali Osama Malik, Oliver Abela, Subodh Devabhaktuni, Arhama Aftab Malik, Gayle Allenback, Chowdhury H Ahsan, Sanjay Malhotra, Jimmy Diep
AIM: To investigate the relationship of inferior wall ischemia on myocardial perfusion imaging in patients with non-dominant right coronary artery anatomy. METHODS: This was a retrospective observational analysis of consecutive patients who presented to the emergency department with primary complaint of chest pain. Only patients who underwent single photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) were included. Patients who showed a reversible defect on SPECT MPI and had coronary angiography during the same hospitalization was analyzed...
March 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28400918/patient-selection-for-transcatheter-aortic-valve-replacement-a-combined-clinical-and-multimodality-imaging-approach
#15
REVIEW
Rosangela Cocchia, Antonello D'Andrea, Marianna Conte, Massimo Cavallaro, Lucia Riegler, Rodolfo Citro, Cesare Sirignano, Massimo Imbriaco, Maurizio Cappelli, Giovanni Gregorio, Raffaele Calabrò, Eduardo Bossone
Transcatheter aortic valve replacement (TAVR) has been validated as a new therapy for patients affected by severe symptomatic aortic stenosis who are not eligible for surgical intervention because of major contraindication or high operative risk. Patient selection for TAVR should be based not only on accurate assessment of aortic stenosis morphology, but also on several clinical and functional data. Multi-Imaging modalities should be preferred for assessing the anatomy and the dimensions of the aortic valve and annulus before TAVR...
March 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28397961/the-association-between-wedging-of-the-aorta-and-cardiac-structural-anatomy-as-revealed-using-multidetector-row-computed-tomography
#16
Shumpei Mori, Robert H Anderson, Tomofumi Takaya, Takayoshi Toba, Tatsuro Ito, Sei Fujiwara, Yoshiaki Watanabe, Tatsuya Nishii, Atsushi K Kono, Ken-Ichi Hirata
The aortic root is wedged within the cardiac base. The precise extent of aortic wedging, however, and its influence on the surrounding cardiac structures, has not been systematically investigated. We analysed 100 consecutive patients, who underwent coronary arterial computed tomographic angiography. We assessed the extent of aortic wedging by measuring the vertical distance between the non-adjacent aortic sinus and the inferior epicardium. A shorter distance indicates deeper aortic wedging. We assessed the tilt angle and diameter of the ascending aorta, the relative heights of the left atrial roof and the oval fossa, the shape of the proximal right coronary artery, the angle of the aorta relative to the left ventricular axis, and the lung volume...
April 11, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28396960/association-of-b-type-natriuretic-peptide-with-coronary-plaque-subtypes-detected-by-coronary-computed-tomography-angiography-in-patients-with-stable-chest-pain
#17
Yuhai Yang, Caiqin Li, Lei Zhao
Increased B-type natriuretic peptide (BNP) level has been suggested to improve clinical predictions of coronary events and all-cause mortality. We aimed to analyze the relationship between BNP levels and coronary plaque subtypes as detected by coronary computed tomography angiography (CCTA). 402 subjects undergoing CCTA were enrolled. The relationship between increased levels of BNP and plaque subtypes was tested using multivariable linear and logistic regression analysis. Plaques were categorized into subtypes of calcified, mixed and non-calcified...
April 10, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28396126/improved-estimation-of-coronary-plaque-and-luminal-attenuation-using-a-vendor-specific-model-based-iterative-reconstruction-algorithm-in-contrast-enhanced-ct-coronary-angiography
#18
Yoshinori Funama, Daisuke Utsunomiya, Kenichiro Hirata, Katsuyuki Taguchi, Takeshi Nakaura, Seitaro Oda, Masafumi Kidoh, Hideaki Yuki, Yasuyuki Yamashita
RATIONALE AND OBJECTIVES: To investigate the stabilities of plaque attenuation and coronary lumen for different plaque types, stenotic degrees, lumen densities, and reconstruction methods using coronary vessel phantoms and the visualization of coronary plaques in clinical patients through coronary computed tomography (CT) angiography. MATERIALS AND METHODS: We performed 320-detector volume scanning of vessel tubes with stenosis and a tube without stenosis using three types of plaque CT numbers...
April 7, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28396082/pregnancy-related-spontaneous-coronary-artery-dissection-a%C3%A2-case-series-and-literature-review
#19
Emily Rose, Maheedhar Gedela, Nathan Miller, Paul L Carpenter
BACKGROUND: Cardiac emergencies during pregnancy are rare but have significant associated morbidity and mortality when they do occur. The emergency physician must not only be aware of potentially life-threatening conditions in the pregnant woman, but also know the emergent management and treatment of these conditions to avoid worsening of the underlying condition. Pregnancy-related spontaneous coronary artery dissection has been described in the cardiology literature, but is not well-known in emergency medicine literature...
April 7, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28395916/strengths-and-limitations-of-coronary-angiography-with-turbo-high-pitch-third-generation-dual-source-ct
#20
M M Ochs, F Andre, G Korosoglou, T Fritz, S Seitz, Y Bogomazov, C L Schlett, R Sokiranski, A Sommer, F Gückel, M Brado, H-U Kauczor, J Görich, H A Katus, S J Buss
AIM: To define practical limitations of diagnostic image quality for recently introduced turbo high-pitch scan mode (THP) in third-generation dual-source computed tomography (CT). MATERIALS AND METHODS: Two hundred and twenty-nine consecutive patients undergoing CT coronary angiography were included in this retrospective single-centre analysis. A contrast-enhanced volume dataset was acquired in THP. Image quality of coronary segments was classified as diagnostic or non-diagnostic by three blinded readers...
April 8, 2017: Clinical Radiology
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