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Journal of Cardiovascular Computed Tomography

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https://www.readbyqxmd.com/read/28528693/a-rare-case-of-aortic-arch-dysplasia-in-a-50-year-old-woman
#1
Jianlong Yan, Wenming Shao, Aidong Zhang
No abstract text is available yet for this article.
May 10, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28483581/prognostic-value-of-segment-involvement-score-compared-to-other-measures-of-coronary-atherosclerosis-by-computed-tomography-a-systematic-review-and-meta-analysis
#2
Chadi Ayoub, Fernanda Erthal, Mahmoud A Abdelsalam, M Hassan Murad, Zhen Wang, Patricia J Erwin, Graham S Hillis, Leonard Kritharides, Benjamin J W Chow
BACKGROUND: The segment involvement score (SIS) is a semiquantitative measure of the extent of atherosclerosis burden by coronary computed tomography angiography (CTA). We sought to evaluate by meta-analysis the prognostic value of SIS, and to compare it with other CTA measures of coronary artery disease (CAD). METHODS: Electronic databases from 1946 to January 2016 were searched. Studies reporting SIS, or an equivalent measure by coronary CTA, and clinical outcomes were included...
May 3, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28487137/clinical-risk-factors-alone-are-inadequate-for-predicting-significant-coronary-artery-disease
#3
Frederick K Korley, Constantine Gatsonis, Bradley S Snyder, Richard T George, Thura Abd, Stefan L Zimmerman, Harold I Litt, Judd E Hollander
OBJECTIVE: We sought to derive and validate a model for identifying suspected ACS patients harboring undiagnosed significant coronary artery disease (CAD). METHODS: This was a secondary analysis of data from a randomized control trial (RCT). Patients randomized to the CTA arm of an RCT examining a CTA-based strategy for ruling-out acute coronary syndrome (ACS) constitute the derivation cohort, which was randomly divided into a training dataset (2/3, used for model derivation) and a test dataset (1/3, used for internal validation (IV))...
April 27, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28476505/coronary-computed-tomography-angiography-derived-risk-score-in-predicting-cardiac-events
#4
Valtteri Uusitalo, Vasileios Kamperidis, Michiel A de Graaf, Teemu Maaniitty, Iida Stenström, Alexander Broersen, Jouke Dijkstra, Arthur J Scholte, Antti Saraste, Jeroen J Bax, Juhani Knuuti
BACKGROUND: We evaluated the prognostic value of an integrated atherosclerosis risk score combining the markers of coronary plaque burden, location and composition as assessed by computed tomography angiography (CTA). METHODS: 922 consecutive patients underwent CTA for suspected coronary artery disease (CAD). Patients without atherosclerosis (n = 261) and in whom quantitative CTA analysis was not feasible due to image quality, step-artefacts or technical factors related to image acquisition or data storage (n = 153) were excluded...
April 27, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28457950/practical-determination-of-aortic-valve-calcium-volume-score-on-contrast-enhanced-computed-tomography-prior-to-transcatheter-aortic-valve-replacement-and-impact-on-paravalvular-regurgitation-elucidating-optimal-threshold-cutoffs
#5
Nicolas Bettinger, Omar K Khalique, Joseph M Krepp, Nadira B Hamid, David J Bae, Todd C Pulerwitz, Ming Liao, Rebecca T Hahn, Torsten P Vahl, Tamim M Nazif, Isaac George, Martin B Leon, Andrew J Einstein, Susheel K Kodali
BACKGROUND: The threshold for the optimal computed tomography (CT) number in Hounsfield Units (HU) to quantify aortic valvular calcium on contrast-enhanced scans has not been standardized. Our aim was to find the most accurate threshold to predict paravalvular regurgitation (PVR) after transcatheter aortic valve replacement (TAVR). METHODS: 104 patients who underwent TAVR with the CoreValve prosthesis were studied retrospectively. Luminal attenuation (LA) in HU was measured at the level of the aortic annulus...
April 22, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28438441/topsy-turvy-heart-and-associated-imaging-findings
#6
Zuhal Bayramoglu, Ravza Yılmaz, Ali Aslan Demir, Ensar Yekeler, Memduh Dursun, Aygun Dindar, Kemal Nisli, Rukiye Omeroglu
No abstract text is available yet for this article.
April 20, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28442244/automatic-high-resolution-infarct-detection-using-volumetric-multiphase-dual-energy-ct
#7
Veit Sandfort, Alan C Kwan, Comfort Elumogo, Davis M Vigneault, Rolf Symons, Amir Pourmorteza, Kelly Rice, Cynthia Davies-Venn, Mark A Ahlman, Chia-Ying Liu, Stefan L Zimmerman, David A Bluemke
OBJECTIVES: Late contrast enhancement CT (LCE-CT) visualizes the presence of myocardial infarcts. Differentiation of the contrast-enhanced infarct from blood pool is challenging. We developed a novel method using data from first pass CT angiography (CTA) imaging to enable automatic infarct detection. MATERIALS AND METHODS: A canine model of myocardial infarction was produced in 11 animals. Two months later, first pass CTA (90 kVp) and LCE-CT (dual energy 90 kVp/150 kVp tin filtered) were performed...
April 18, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28431861/cardiac-computed-tomography-derived-myocardial-mass-at-risk-using-the-voronoi-based-segmentation-algorithm-a-histological-validation-study
#8
Seiko Ide, Satoru Sumitsuji, Osamu Yamaguchi, Yasushi Sakata
BACKGROUND: Myocardial mass at risk (MMAR) is an important predictor of adverse cardiac events in patients with ischemic heart disease. This study aims to validate the accuracy of MMAR calculated from cardiac computed tomography (CCT) data using the Voronoi-based segmentation algorithm in comparison with actual MMAR measured on ex-vivo swine hearts prepared by injecting a dye into the coronary arteries. METHODS: Fifteen extracted swine hearts had India ink injected into one of the major coronary arteries...
April 18, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28431860/predictive-value-of-perfusion-defects-on-dual-energy-cta-in-the-absence-of-thromboembolic-clots
#9
Richard A P Takx, Thomas Henzler, U Joseph Schoepf, Thomas Germann, Stefan O Schoenberg, Aysel Shirinova, Ralf W Bauer, Claudia Frellesen, Long Jiang Zhang, John W Nance, Christian Fink, Paul Apfaltrer
BACKGROUND: To determine the predictive value of volumetrically measured lung perfusion defects (PDvol) and right ventricular dysfunction on dual-energy computed tomography angiography (DE-CTA) for predicting all cause mortality in patients suspected of pulmonary embolism (PE) but without evident thromboembolic clot on CTA. METHODS: 448 patients underwent DE-CTA on a 64-channel DSCT system between January 2007 and December 2012 for suspected PE, of which 115 were without detectable thromboembolic clot on CTA...
April 18, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28416358/non-gated-high-pitch-computed-tomography-aortic-angiography-myocardial-perfusion-defects-in-patients-with-suspected-aortic-dissection
#10
Li-Ting Huang, Shih-Hung Chan, Chia-Chang Chuang, Yi-Shan Tsai
OBJECTIVES: To investigate the diagnostic value of first-pass myocardial perfusion defects visualised in non-gated high-pitch computed tomography angiography (CTA) in patients admitted to the emergency department (ED) for suspected aortic dissection. METHODS: We recruited 174 ED patients who underwent high-pitch CTA of the aorta because of suspected aortic dissection. We divided these patients into two groups (diseased and control groups) based on whether their clinical data fulfilled the third universal definition of acute myocardial infarction (AMI), specifically an increase in cardiac troponin (cTn) with at least one of the following: (a) symptoms of ischemia; (b) new ST-segment-T wave (ST-T) changes or new left bundle branch block (LBBB); (c) development of pathological Q wave; (d) new loss of viable myocardium or new regional wall motion abnormality; or (e) identification of an intracoronary thrombus by angiography or autopsy...
April 12, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28396198/left-ventricular-access-point-determination-for-a-coaxial-approach-to-the-mitral-annular-landing-zone-in-transcatheter-mitral-valve-replacement
#11
Philipp Blanke, Jong K Park, Paul Grayburn, Christopher Naoum, Kevin Ong, Keshav Kohli, Bjarne L Norgaard, John G Webb, Jeffrey Popma, David Boshell, Paul Sorajja, David Muller, Jonathon Leipsic
INTRODUCTION: To facilitate coaxial device deployment in transcatheter mitral valve replacement (TMVR), a coaxial approach to the mitral annular plane is needed. We sought to establish a method to determine an 'orthogonal' left ventricular (LV) access point for transapical TMVR and to quantitatively characterize its location in patients with severe mitral regurgitation using cardiac computed tomography. METHODS: Cardiac CT data sets of 54 patients with moderate-severe mitral regurgitation evaluated for potential TMVR were analyzed...
April 7, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28420590/volume-and-dimensions-of-angiographically-normal-coronary-arteries-assessed-by-multidetector-computed-tomography
#12
Samuel Kiil Sørensen, Jørgen Tobias Kühl, Andreas Fuchs, Jakob Boesgaard Norsk, Lars Valeur Køber, Børge Grønne Nordestgaard, Klaus Fuglsang Kofoed
BACKGROUND: The objective of this study was to determine normal values for coronary artery volume (CAV) and individual vasculature and segment dimensions. METHODS: We examined 200 healthy volunteers with an Agatston score of 0 and a normal, high quality coronary CTA. Using 320 slice multidetector row CT and designated vessel tracing software with border detection algorithm, the main coronary arteries and branches were delineated and total and segmental dimensions calculated...
April 4, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28411031/prognostic-value-of-visually-detected-coronary-artery-calcification-on-unenhanced-non-gated-thoracic-computed-tomography-for-prediction-of-non-fatal-myocardial-infarction-and-all-cause-mortality
#13
Lisa Shao, Andrew T Yan, Gerald Lebovic, Harvey H Wong, Anish Kirpalani, Djeven P Deva
PURPOSE: To determine the prognostic value of visually detected coronary artery calcification (CAC) on unenhanced non-gated thoracic computed tomography (CT) for non-fatal myocardial infarction (MI) and all-cause mortality. METHODS: This retrospective single-centre cohort study comprised of 410 consecutive patients aged 40-80 years without any known cardiovascular disease at baseline. CT images without electrocardiogram-gating were acquired for a variety of respiratory medicine indications...
March 28, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28506470/coronary-ct-angiography-in-the-emergency-department-utilizing-second-and-third-generation-dual-source-ct
#14
Nandini M Meyersohn, Balint Szilveszter, Pedro V Staziaki, Jan-Erik Scholtz, Richard A P Takx, Udo Hoffmann, Brian B Ghoshhajra
BACKGROUND: Coronary computed tomography angiography (coronary CTA) allows efficient triage of low to intermediate risk patients with suspected acute coronary syndrome (ACS) in the emergency department (ED). Techniques for coronary CTA acquisition in the ED continue to evolve with the establishment of standardized scan protocols and the introduction of newer generations of CT hardware. OBJECTIVES: To evaluate qualitative and quantitative image quality and radiation dose exposure of coronary CTA acquired on 2nd versus 3rd generation dual source CT (DSCT) scanners using a standardized institutional scan protocol designed for the ED...
March 22, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28342678/spontaneous-coronary-artery-intramural-hematoma-in-a-patient-with-vascular-ehlers-danlos-syndrome-serial-findings-in-coronary-computed-tomographic-angiography
#15
Takayoshi Toba, Shumpei Mori, Atsushi Yatani, Yoichiro Sugisaki, Tomomi Akita, Naoto Sasaki, Hiromasa Otake, Toshiro Shinke, Hiroyuki Mori, Tatsuya Nishii, Atsushi K Kono, Ken-Ichi Hirata
No abstract text is available yet for this article.
March 21, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28341196/the-use-of-intraosseous-needles-for-injection-of-contrast-media-for-computed-tomographic-angiography-of-the-thoracic-aorta
#16
Michael Winkler, Cynthia Talley, Connor Woodward, Alexander Kingsbury, Frank Appiah, Hossam Elbelasi, Kevin Landwher, Xingzhe Li, Dominik Fleischmann
BACKGROUND: The objective of this study is to evaluate the safety and quality of computed tomographic angiography of the thoracic aorta (CTA-TA) exams performed using intraosseous needle intravenous access (ION-IVA) for contrast media injection (CMI). METHODS: All CTA-TA exams at the study institution performed between 1/1/2013 and 8/14/2015 were reviewed retrospectively to identify those exams which had been performed using ION-IVA (ION-exams). ION-exams were then analyzed to determine aortic attenuation and contrast-to-noise ratio (CNR)...
March 16, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28283309/clinical-indications-for-coronary-artery-calcium-scoring-in-asymptomatic-patients-expert-consensus-statement-from-the-society-of-cardiovascular-computed-tomography
#17
Harvey Hecht, Michael J Blaha, Daniel S Berman, Khurram Nasir, Matthew Budoff, Jonathon Leipsic, Ron Blankstein, Jagat Narula, John Rumberger, Leslee J Shaw
This expert consensus statement summarizes the available data regarding the prognostic value of CAC in the asymptomatic population and its ability to refine individual risk prediction, addresses the limitations identified in the current traditional risk factor-based treatment strategies recommended by the 2013 ACC/AHA Prevention guidelines including use of the Pooled Cohort Equations (PCE), and the US Preventive Services Task Force (USPSTF) Recommendation Statement for Statin Use for the Primary Prevention of Cardiovascular Disease in Adults...
February 24, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28259630/large-saphenous-graft-aneurysm-that-compresses-the-right-heart
#18
Juana Ma Plasencia-Martínez, Manuel Gonzálvez-Ortega, Ana Sánchez-González, María Remedios Rodríguez-Mondéjar, Manuel Luis Rodríguez-Rodríguez, Ángel Antonio López-Cuenca
We present an illustrative case of a very rare complication of saphenous bypass: a huge aneurysm that severely compresses the right-heart cavities.
February 24, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28420591/scct-and-cta-the-future-is-now
#19
EDITORIAL
Leslee J Shaw
No abstract text is available yet for this article.
May 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28229910/optimized-energy-of-spectral-ct-for-infarct-imaging-experimental-validation-with-human-validation
#20
Veit Sandfort, Srikanth Palanisamy, Rolf Symons, Amir Pourmorteza, Mark A Ahlman, Kelly Rice, Tom Thomas, Cynthia Davies-Venn, Bernhard Krauss, Alan Kwan, Ankur Pandey, Stefan L Zimmerman, David A Bluemke
OBJECTIVES: Late contrast enhancement visualizes myocardial infarction, but the contrast to noise ratio (CNR) is low using conventional CT. The aim of this study was to determine if spectral CT can improve imaging of myocardial infarction. MATERIALS AND METHODS: A canine model of myocardial infarction was produced in 8 animals (90-min occlusion, reperfusion). Later, imaging was performed after contrast injection using CT at 90 kVp/150 kVpSn. The following reconstructions were evaluated: Single energy 90 kVp, mixed, iodine map, multiple monoenergetic conventional and monoenergetic noise optimized reconstructions...
May 2017: Journal of Cardiovascular Computed Tomography
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