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Coronary computed tomography angiography

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https://www.readbyqxmd.com/read/29454266/simplified-bernoulli-formula-to-predict-flow-limiting-stenosis-at-coronary-computed-tomography-angiography
#1
Nobuo Tomizawa, Kodai Yamamoto, Shinichi Inoh, Takeshi Nojo, Sunao Nakamura
OBJECTIVE: To compare the diagnostic performance of estimated energy loss (EEL) with diameter stenosis (DS) to estimate significant stenosis by fractional flow reserve (FFR). MATERIALS AND METHODS: One hundred twenty-five patients were included. EEL was calculated using DS, lesion length, minimal lumen area and left ventricular volume. FFR ≤ 0.80 was determined significant. RESULTS: EEL improved the accuracy from 63% (95% confidence interval (CI): 55-72%) to 83% (95% CI: 75-89%, p < 0...
February 6, 2018: Clinical Imaging
https://www.readbyqxmd.com/read/29452689/measurements-of-lumen-areas-and-diameters-of-proximal-and-middle-coronary-artery-segments-in-subjects-without-coronary-atherosclerosis
#2
Jaroslaw Skowronski, Jerzy Pregowski, Gary S Mintz, Mariusz Kruk, Cezary Kepka, Pawel Tyczynski, Ilona Michalowska, Lukasz Kalinczuk, Maksymilian P Opolski, Michal Ciszewski, Rafal Wolny, Zbigniew Chmielak, Adam Witkowski
There are plenty of data on morphology and lumen dimensions of diseased coronary arteries. However, information on normal coronary vessel anatomy is scarce. We provided computed tomography angiography-derived reference values of lumen dimensions in proximal and middle coronary segments in a healthy population with respect to gender and vessel dominance. Consecutive 2,849 computed tomography angiography examinations were reviewed to identify 201 subjects (77 men, patient age 50 ± 13 years) whose coronary arteries were free from any sign of atherosclerosis (calcium score 0, no detectable plaque)...
February 2, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29450741/utility-of-cardiac-computed-tomography-scanning-in-the-diagnosis-and-pre-operative-evaluation-of-patients-with-infective-endocarditis
#3
Jason R Sims, Nandan S Anavekar, Krishnaswamy Chandrasekaran, James M Steckelberg, Walter R Wilson, Bernard J Gersh, Larry M Baddour, Daniel C DeSimone
Transesophageal echocardiography (TEE) is the gold standard imaging study used in the diagnosis of infective endocarditis (IE). Computed tomography angiography (CTA) has undergone rapid advancement as a cardiac imaging technique and has previously shown promise in small non-randomized studies for evaluation of IE. We hypothesized that cardiac CTA would perform similarly to TEE in the detection of endocarditic lesions and that there would be no difference in clinical outcomes whether the coronary arteries were evaluated by CTA or invasive coronary angiography (ICA)...
February 15, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29447342/diagnosing-coronary-artery-disease-after-a-positive-coronary-computed-tomography-angiography-the-dan-nicad-open-label-parallel-head-to-head-randomized-controlled-diagnostic-accuracy-trial-of-cardiovascular-magnetic-resonance-and-myocardial-perfusion-scintigraphy
#4
L Nissen, S Winther, J Westra, J A Ejlersen, C Isaksen, A Rossi, N R Holm, G Urbonaviciene, L C Gormsen, L H Madsen, E H Christiansen, M Maeng, L L Knudsen, L Frost, L Brix, H E Bøtker, S E Petersen, M Bøttcher
Aims: Perfusion scans after coronary computed tomography angiography (CCTA) in patients with suspected coronary artery disease (CAD) may reduce unnecessary invasive coronary angiographies (ICAs). However, the diagnostic accuracy of perfusion scans after primary CCTA is unknown. The aim of this study was to determine the diagnostic accuracy of cardiac magnetic resonance (CMR) and myocardial perfusion scintigraphy (MPS) against ICA with fractional flow reserve (FFR) in patients suspected of CAD by CCTA...
February 13, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29447331/evaluation-of-coronary-artery-disease-after-computed-tomography-angiography
#5
Antti Saraste, Juhani Knuuti
No abstract text is available yet for this article.
February 13, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29446126/layer-specific-global-longitudinal-strain-reveals-impaired-cardiac-function-in-patients-with-reversible-ischemia
#6
Christoffer E Hagemann, Søren Hoffmann, Flemming J Olsen, Peter G Jørgensen, Thomas Fritz-Hansen, Jan S Jensen, Tor Biering-Sørensen
AIMS: Two-dimensional speckle tracking echocardiography (2DSTE) detects early signs of left ventricular dysfunction; however, it is unknown whether layer-specific global longitudinal strain (GLS) has incremental value in diagnosis of patients with reversible ischemia assessed by single photon emission computed tomography (SPECT). METHODS AND RESULTS: Eighty patients with stable angina pectoris (SAP), normal left ventricular ejection fraction (LVEF), and no history of ischemic heart disease were retrospectively identified to have been examined by 2DSTE, SPECT, and coronary angiography (CAG)...
February 15, 2018: Echocardiography
https://www.readbyqxmd.com/read/29444926/high-sensitivity-cardiac-troponin-i-and-the-diagnosis-of-coronary-artery-disease-in-patients-with-suspected-angina-pectoris
#7
Philip D Adamson, Amanda Hunter, Debbie M Madsen, Anoop S V Shah, David A McAllister, Tania A Pawade, Michelle C Williams, Colin Berry, Nicholas A Boon, Marcus Flather, John Forbes, Scott McLean, Giles Roditi, Adam D Timmis, Edwin J R van Beek, Marc R Dweck, Hans Mickley, Nicholas L Mills, David E Newby
BACKGROUND: We determined whether high-sensitivity cardiac troponin I can improve the estimation of the pretest probability for obstructive coronary artery disease (CAD) in patients with suspected stable angina. METHODS AND RESULTS: In a prespecified substudy of the SCOT-HEART trial (Scottish Computed Tomography of the Heart), plasma cardiac troponin was measured using a high-sensitivity single-molecule counting assay in 943 adults with suspected stable angina who had undergone coronary computed tomographic angiography...
February 2018: Circulation. Cardiovascular Quality and Outcomes
https://www.readbyqxmd.com/read/29441745/evaluation-of-atherosclerotic-plaque-in-non-invasive-coronary-imaging
#8
REVIEW
Aeshita Dwivedi, Subhi J Al'Aref, Fay Y Lin, James K Min
Coronary artery disease (CAD) is the leading cause of morbidity and mortality worldwide. Over the last decade coronary computed tomography angiography (CCTA) has gained wide acceptance as a reliable, cost-effective and non-invasive modality for diagnosis and prognostication of CAD. Use of CCTA is now expanding to characterization of plaque morphology and identification of vulnerable plaque. Additionally, CCTA is developing as a non-invasive modality to monitor plaque progression, which holds future potential in individualizing treatment...
February 2018: Korean Circulation Journal
https://www.readbyqxmd.com/read/29439144/coronary-computed-tomography-angiography-detection-of-short-and-long-term-outcomes-after-heart-valve-surgery-with-high-risk-cardiovascular-patients
#9
Zhi Zhu, Shuofeng Li
Coronary computed tomography angiography (CCTA) is a promising alternative technique to detect significant coronary artery lesions in high-risk cardiovascular patients with left ventricular dysfunction (left ventricular ejection fractions < 40%) referred for elective valve surgery, while little research about the use of CCTA to detect the outcomes of heart valve surgery was performed. Forty-six consecutive high-risk cardiovascular patients with the New York Heart Association (NYHA) classification were retrospectively studied...
February 8, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29430423/mid-term-results-of-minimally-invasive-direct-coronary-artery-bypass-grafting
#10
Dong Hyun Seo, Jun Sung Kim, Kay-Hyun Park, Cheong Lim, Su Ryeun Chung, Dong Jung Kim
Background: Minimally invasive direct coronary artery bypass grafting (MIDCAB) has the advantage of allowing arterial grafting on the left anterior descending artery without a sternotomy incision. We present our single-center clinical experience of 66 consecutive patients. Methods: All patients underwent MIDCAB through a left anterior small thoracotomy between August 2007 and July 2015. Preoperative, intraoperative, postoperative and follow-up data-including major adverse cardiovascular and cerebrovascular events (MACCE), graft patency, and the need for re-intervention-were collected...
February 2018: Korean Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29426687/coronary-manifestations-of-kawasaki-disease-in-computed-tomography-coronary-angiography
#11
Yong Geng Goh, Ching Ching Ong, Grace Tan, Chong Ri Liang, Sanah Merchant Soomar, Chee Wen Terence Lim, Swee Chye Quek, Li San Lynette Teo
Coronary arteritis in Kawasaki disease can lead to serious complications such myocardial infarction and sudden death. The identification of coronary manifestations with a method that is minimally invasive and of low radiation exposure is therefore important in paediatric patients with Kawasaki disease. Coronary CT angiography can be an attractive alternative to invasive coronary angiography. This paper describes imaging techniques for coronary CT angiography in pediatric patients and demonstrates the spectrum of cardiovascular manifestations in patients with Kawasaki disease...
December 11, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29422416/incidence-and-predictors-of-lesion-specific-ischemia-by-ffrct-learnings-from-the-international-advance-registry
#12
Hironori Kitabata, Jonathon Leipsic, Manesh R Patel, Koen Nieman, Bernard De Bruyne, Campbell Rogers, Gianluca Pontone, Bjarne L Nørgaard, Jeroen J Bax, Gilbert Raff, Kavitha M Chinnaiyan, Mark Rabbat, Niels Peter Rønnow Sand, Philipp Blanke, Timothy A Fairbairn, Hitoshi Matsuo, Tetsuya Amano, Tomohiro Kawasaki, Yoshihiro Morino, Takashi Akasaka
BACKGROUND: To date, the clinical utility of coronary computed tomography angiography (CTA)-derived fractional flow reserve (FFRCT) has been limited to trials and single center experiences. We herein report the incidence of abnormal FFRCT (≤0.80) and the relationship of lesion-specific ischemia to subject demographics, symptoms, and degree of stenosis in the multicenter, prospective ADVANCE registry. METHODS: One thousand patients with suspected angina having documented coronary artery disease on coronary CTA and clinically referred for FFRCT were prospectively enrolled in the registry...
February 2, 2018: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29414521/association-between-epicardial-fat-volume-and-fractional-flow-reserve-an-analysis-of-the-determination-of-fractional-flow-reserve-defacto-study
#13
Ashley Beecy, Bríain Ó Hartaigh, Joshua Schulman-Marcus, Khalil Anchouche, Heidi Gransar, Subhi Al'Aref, Kimberly Elmore, Fay Y Lin, James K Min, Jessica M Peña
BACKGROUND: This study examines the relationship between epicardial fat volume (EFV) and lesion-specific ischemia by fractional flow reserve (FFR). METHODS: In a study of 173 patients (63.0 ± 8.3 years) undergoing FFR, EFV was determined using cardiac computed tomography. Relationships between EFV and FFR were assessed using multivariable linear and logistic regression. RESULTS: Using multivariable linear and logistic regression, no association between EFV and FFR was observed (β [SE] = -0...
February 2, 2018: Clinical Imaging
https://www.readbyqxmd.com/read/29409057/endothelial-shear-stress-5-years-after-implantation-of-a-coronary-bioresorbable-scaffold
#14
Vikas Thondapu, Erhan Tenekecioglu, Eric K W Poon, Carlos Collet, Ryo Torii, Christos V Bourantas, Cheng Chin, Yohei Sotomi, Hans Jonker, Jouke Dijkstra, Eve Revalor, Frank Gijsen, Yoshinobu Onuma, Andrew Ooi, Peter Barlis, Patrick W Serruys
Aims: As a sine qua non for arterial wall physiology, local hemodynamic forces such as endothelial shear stress (ESS) may influence long-term vessel changes as bioabsorbable scaffolds dissolve. The aim of this study was to perform serial computational fluid dynamic (CFD) simulations to examine immediate and long-term haemodynamic and vascular changes following bioresorbable scaffold placement. Methods and results: Coronary arterial models with long-term serial assessment (baseline and 5 years) were reconstructed through fusion of intravascular optical coherence tomography and angiography...
February 2, 2018: European Heart Journal
https://www.readbyqxmd.com/read/29406941/cardiac-imaging-modalities-and-appropriate-use
#15
REVIEW
Paul Gabriel Peterson, Michael Berge, John P Lichtenberger, Maureen N Hood, Vincent B Ho
Cardiovascular imaging with calcium scoring computed tomography (CT), coronary CT angiography (CCTA), and cardiac MRI (CMR) have advanced rapidly over recent years. These imaging modalities have increased in availability, accessibility, and clinical practicality due to technological advances allowing for significant radiation dose reduction for high-quality CCTA and for rapid and reliable imaging techniques in CMR. Hardware and software developments are continually increasing efficiency and accuracy of postprocessing...
March 2018: Primary Care
https://www.readbyqxmd.com/read/29406855/effect-of-plaque-burden-and-morphology%C3%A2-on-myocardial-blood-flow-and%C3%A2-fractional-flow%C3%A2-reserve
#16
Roel S Driessen, Wijnand J Stuijfzand, Pieter G Raijmakers, Ibrahim Danad, James K Min, Jonathon A Leipsic, Amir Ahmadi, Jagat Narula, Peter M van de Ven, Marc C Huisman, Adriaan A Lammertsma, Albert C van Rossum, Niels van Royen, Paul Knaapen
BACKGROUND: Atherosclerotic plaque characteristics may affect downstream myocardial perfusion, as well as coronary lesion severity. OBJECTIVES: This study sought to evaluate the association between quantitative plaque burden and plaque morphology obtained using coronary computed tomography angiography (CTA) and quantitative myocardial perfusion obtained using [15O]H2O positron emission tomography (PET), as well as fractional flow reserve (FFR) derived invasively...
February 6, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29401041/perivascular-epicardial-fat-stranding-at-coronary-ct-angiography-a-marker-of-acute-plaque-rupture-and-spontaneous-coronary-artery-dissection
#17
Sandeep Hedgire, Vinit Baliyan, Evan J Zucker, Daniel O Bittner, Pedro Staziaki, Richard A P Takx, Jan-Erik Scholtz, Nandini Meyersohn, Udo Hoffmann, Brian Ghoshhajra
Purpose To evaluate the frequency and implications of perivascular fat stranding on coronary computed tomography (CT) angiograms obtained for suspected acute coronary syndrome (ACS). Materials and Methods This retrospective registry study was approved by the institutional review board. The authors reviewed the medical records and images of 1403 consecutive patients (796 men, 607 women; mean age, 52.8 years) who underwent coronary CT angiography at the emergency department from February 2012 to March 2016. Fat attenuation, length and number of circumferential quadrants of the affected segment, and attenuation values in the unaffected epicardial and subcutaneous fat were measured...
February 5, 2018: Radiology
https://www.readbyqxmd.com/read/29399085/correlations-of-chemokine-cxcl16-and-tnf-%C3%AE-with-coronary-atherosclerotic-heart-disease
#18
Jieyong Xing, Yanshao Liu, Tao Chen
This study determined the correlations of CXC ligand 16 (CXCL16) and tumor necrosis factor-α (TNF-α) levels with coronary atherosclerotic heart disease (CAHD) and screened for new clinical markers for the prognosis and treatment of the disease. Eighty patients with coronary heart disease and 50 healthy subjects were enrolled into a CAHD or healthy control group, respectively. Computed tomography (CT) coronary angiography and Gensini integral were used to classify plaques and evaluate patients with coronary heart disease...
January 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29398384/ultra-short-acting-%C3%AE-blockers-esmolol-and-landiolol-in-the-perioperative-period-and-in-critically-ill-patients
#19
REVIEW
Ricardo Poveda-Jaramillo, Fabrizio Monaco, Alberto Zangrillo, Giovanni Landoni
β-Blockers are useful drugs in several clinical cardiologic scenarios. Their use in the perioperative period and in critically ill patients is increasing, but their effect on clinically relevant outcomes remains controversial. Long-acting β-blockers can have detrimental effects that are difficult to be counteracted in these settings. The authors describe the possible clinical uses of ultra-short-acting β-blockers (esmolol and landiolol) in the perioperative period and in critically ill patients because these drugs have the beneficial effects of β-blockers, but do not have the detrimental effects of long-acting agents...
November 23, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29397334/optimized-energy-of-spectral-coronary-ct-angiography-for-coronary-plaque-detection-and-quantification
#20
Rolf Symons, Younhee Choi, Tyler E Cork, Mark A Ahlman, Marissa Mallek, David A Bluemke, Veit Sandfort
BACKGROUND: To optimize spectral coronary computed tomography angiography (CTA) for quantification of coronary artery plaque components. MATERIALS AND METHODS: Fifty-one subjects were prospectively enrolled (88.2% male) (NCT02740699). Dual energy coronary CTA was performed at 90/Sn150 kVp using a 3rd generation dual-source CT scanner (SOMATOM Force, Siemens Healthcare). Dual energy images were reconstructed with a) linear mixed blending of 90 and Sn150 kVp data, b) virtual monoenergetic algorithm from 40 to 150 keV (at 10- keV intervals), and c) noise-optimized virtual monoenergetic algorithm from 40 to 150 keV...
February 1, 2018: Journal of Cardiovascular Computed Tomography
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