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Coronary ct angiography

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https://www.readbyqxmd.com/read/28346530/quantification-of-left-coronary-bifurcation-angles-and-plaques-by-coronary-computed-tomography-angiography-for-prediction-of-significant-coronary-stenosis-a-preliminary-study-with-dual-source-ct
#1
Yue Cui, Wenjuan Zeng, Jie Yu, Jing Lu, Yuannan Hu, Nan Diao, Bo Liang, Ping Han, Heshui Shi
PURPOSE: To evaluate the diagnostic performance of left coronary bifurcation angles and plaque characteristics for prediction of coronary stenosis by dual-source CT. METHODS: 106 patients suspected of coronary artery disease undergoing both coronary computed tomography angiography (CCTA) and invasive coronary angiography (CAG) within three months were included. Left coronary bifurcation angles including the angles between the left anterior descending artery and left circumflex artery (LAD-LCx), left main coronary artery and left anterior descending artery (LM-LAD), left main coronary artery and left circumflex artery (LM-LCx) were measured on CT images...
2017: PloS One
https://www.readbyqxmd.com/read/28343599/presence-characteristics-and-volumes-of-coronary-plaque-determined-by-computed-tomography-angiography-in-young-type-2-diabetes-mellitus
#2
Negin Nezarat, Matthew J Budoff, Yanting Luo, Sirous Darabian, Rine Nakanishi, Dong Li, Nasim Sheidaee, Michael Kim, Anas Alani, Suguru Matsumoto, Sina Rahmani, Mitsuru Kanisawa, Indre Ceponiene, Kazuhiro Osawa, Hong Qi, Sajad Hamal, Pieter Kitslaar, Alexander Broersen, Ferdinand Flores, Eli Ipp, Bahram Khazai
Prevention and management of coronary artery disease (CAD) is of great concern in patients with diabetes mellitus. Although the impact of coronary atherosclerosis is described well for subjects older than 40 years, the prevalence and types of coronary atherosclerosis in young patients are not well known. The aim of this study was to evaluate the prevalence, extent, severity, and volumes of coronary plaque in type 2 diabetes mellitus (T2DM) population younger than of 40 years. This prospective study enrolled 181 subjects (25-40 year old) undergoing coronary computed tomography angiography, with 86 T2DM and 95 nondiabetic age/gender-matched subjects...
March 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28342101/myocardial-segmentation-based-on-coronary-anatomy-using-coronary-computed-tomography-angiography-development-and-validation-in-a-pig-model
#3
Mi Sun Chung, Dong Hyun Yang, Young-Hak Kim, Soo-Jin Kang, Joonho Jung, Namkug Kim, Seung-Ho Heo, Seunghee Baek, Joon Beom Seo, Byoung Wook Choi, Joon-Won Kang, Tae-Hwan Lim
OBJECTIVES: To validate a method for performing myocardial segmentation based on coronary anatomy using coronary CT angiography (CCTA). METHODS: Coronary artery-based myocardial segmentation (CAMS) was developed for use with CCTA. To validate and compare this method with the conventional American Heart Association (AHA) classification, a single coronary occlusion model was prepared and validated using six pigs. The unstained occluded coronary territories of the specimens and corresponding arterial territories from CAMS and AHA segmentations were compared using slice-by-slice matching and 100 virtual myocardial columns...
March 24, 2017: European Radiology
https://www.readbyqxmd.com/read/28338554/eligibility-for-minimally-invasive-coronary-artery-bypass-examination-of-epicardial-adipose-tissue-using-computed-tomography
#4
Kate E M Dillon, Marjorie Johnson, Ian L Chan, Bob Kiaii
OBJECTIVE: A variable that necessitates conversion to a conventional full-sternotomy coronary artery bypass procedure from a robotic-assisted endoscopic single-vessel small thoracotomy is the inability to visualize the left anterior descending coronary artery within the surrounding epicardial adipose tissue using the endoscopic camera. The purpose of this study was to determine whether anatomical properties of the epicardial adipose tissue examined using preoperative computed tomography (CT) images are able to predict and thus reduce the need for intraoperative conversion based on effective preoperative exclusion criteria...
March 23, 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/28335983/ideal-guiding-catheter-position-during-bilaterally-engaged-percutaneous-coronary-intervention
#5
Kensuke Yokoi, Masahiko Hara, Yasunori Ueda, Satoru Sumitsuji, Masaki Awata, Youssef K Salah, Daijiro Kabata, Ayumi Shintani, Yasushi Sakata
Using a novel combined angiography computed tomography (CT) system, we evaluated the impact of the intra-aortic root position of a right coronary artery (RCA) catheter on its coaxiality. We retrospectively enrolled 19 patients who underwent CT scans during bilaterally engaged percutaneous coronary intervention. Coaxiality was defined as the angle between the RCA and the RCA catheter. The coaxiality was better when the RCA catheter was placed anterior to the left main coronary artery catheter (median 27.0° vs 53...
March 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28330658/nonobstructive-coronary-artery-disease-by-coronary-ct-angiography-improves%C3%A2-risk-stratification-and-allocation%C3%A2-of-statin%C3%A2-therapy
#6
Hamed Emami, Richard A P Takx, Thomas Mayrhofer, Sumbal Janjua, Jakob Park, Amit Pursnani, Ahmed Tawakol, Michael T Lu, Maros Ferencik, Udo Hoffmann
OBJECTIVES: This study sought to determine prognostic value of nonobstructive coronary artery disease (CAD) for atherosclerotic cardiovascular disease (ASCVD) events and to determine whether incorporation of this information into the pooled cohort equation reclassifies recommendations for statin therapy as defined by the 2013 guidelines for cholesterol management of the American College of Cardiology and American Heart Association (ACC/AHA). BACKGROUND: Detection of nonobstructive CAD by coronary computed tomography angiography may improve risk stratification and permit individualized and more appropriate allocation of statin therapy...
March 10, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28329198/long-term-serial-non-invasive-multislice-computed-tomography-angiography-with-functional-evaluation-after-coronary-implantation-of-a-bioresorbable-everolimus-eluting-scaffold-the-absorb-cohort-b-msct-substudy
#7
Yoshinobu Onuma, Carlos Collet, Robert-Jan van Geuns, Bernard de Bruyne, Evald Christiansen, Jacques Koolen, Pieter Smits, Bernard Chevalier, Dougal McClean, Dariusz Dudek, Stephan Windecker, Ian Meredith, Koen Nieman, Susan Veldhof, John Ormiston, Patrick W Serruys
Aims: Multimodality invasive imaging of the first-in-man cohort demonstrated at 5 years stable lumen dimensions and a low rate of major adverse cardiac events (MACE). However, the long-term non-invasive assessment of this device remains to be documented. The objective was to describe the 72-month multislice computed tomography (MSCT) angiographic and functional findings after the implantation of the second iteration of the fully resorbable everolimus-eluting polymeric scaffold. Methods and results: In the ABSORB Cohort B trial patients with non-complex de novo lesions were treated with second iteration bioresobable vascular scaffold (BVS)...
March 16, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28329166/outcome-in-middle-aged-individuals-with-anomalous-origin-of-the-coronary-artery-from-the-opposite-sinus-a-matched-cohort-study
#8
Christoph Gräni, Dominik C Benz, Dominik A Steffen, Olivier F Clerc, Christian Schmied, Mathias Possner, Jan Vontobel, Fran Mikulicic, Cathérine Gebhard, Aju P Pazhenkottil, Oliver Gaemperli, Shelley Hurwitz, Philipp A Kaufmann, Ronny R Buechel
Aims: Anomalous origin of a coronary artery from the opposite sinus (ACAOS) has been associated with adverse cardiac events in the young. It remains unknown whether this holds true for middle-aged patients with uncorrected ACAOS as well. We assessed the outcome in middle-aged patients with newly diagnosed ACAOS by coronary computed tomography angiography (CCTA) compared with a matched cohort. Methods and results: We retrospectively identified 68 consecutive patients with ACAOS documented by CCTA...
March 16, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28325613/head-to-head-comparison-of-the-diagnostic-performance-of-coronary-computed-tomography-angiography-and-dobutamine-stress-echocardiography-in-the-evaluation-of-acute-chest-pain-with-normal-ecg-findings-and-negative-troponin-tests-a-prospective-multicenter-study
#9
Eric Durand, Fabrice Bauer, Nicolas Mansencal, Arshid Azarine, Benoit Diebold, Albert Hagege, Ludivine Perdrix, Martine Gilard, Yannick Jobic, Hélène Eltchaninoff, Mourad Bensalah, Benjamin Dubourg, Jérôme Caudron, Ralph Niarra, Gilles Chatellier, Jean-Nicolas Dacher, Elie Mousseaux
OBJECTIVE: To perform a head-to-head comparison of coronary CT angiography (CCTA) and dobutamine-stress echocardiography (DSE) in patients presenting recent chest pain when troponin and ECG are negative. METHODS: Two hundred seventeen patients with recent chest pain, normal ECG findings, and negative troponin were prospectively included in this multicenter study and were scheduled for CCTA and DSE. Invasive coronary angiography (ICA), was performed in patients when either DSE or CCTA was considered positive or when both were non-contributive or in case of recurrent chest pain during 6month follow-up...
March 2, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28321775/presence-and-extent-of-cardiac-computed-tomography-angiography-defined-coronary-artery-disease-in-patients-presenting-with-syncope
#10
S Altintas, T Dinh, N G H M Marcks, M Kok, A J J Aerts, B Weijs, Y Blaauw, J E Wildberger, M Das, B L J H Kietselaer, H J G M Crijns
BACKGROUND: In syncope patients, presence of coronary artery disease (CAD) is associated with poor prognosis. However, data concerning CAD prevalence in syncope patients without known cardiovascular disease are lacking. Therefore, the aim of this study was to investigate presence and extent of CAD in syncope patients. METHODS: We included 142 consecutive patients presenting with syncope at the outpatient cardiology clinic who underwent coronary computed tomography (CT) angiography...
March 20, 2017: Netherlands Heart Journal
https://www.readbyqxmd.com/read/28320636/the-significance-of-equivocal-exercise-treadmill-ecg-for-intermediate-risk-chest-pain-assessment-insight-from-coronary-ct-angiography-data
#11
Gary T E Lau, Henry Wei, Jo Wickham, Andrew C Y To
BACKGROUND: Exercise treadmill test (ETT) is commonly the first-line investigation in troponin-negative chest pain patients. Inconclusive results are common and often lead to repeated functional testings. Coronary computed tomographic angiography (CCTA) has excellent negative predictive value for coronary artery disease detection and may play an important role in their diagnostic workup. We aim to analyse ETT and CCTA findings to understand their modern roles in intermediate risk chest pain population with inconclusive ETT...
March 1, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28319503/myocardial-infarction-in-a-patient-with-hypertrophic-cardiomyopathy-but-normal-coronary-arteries
#12
Shuheng Li, Xiaoxin Sun, Zongyao Zhang, Zuo-Xiang He
A 57-year-old man with a history of hypertrophic cardiomyopathy diagnosed by echocardiography experienced atypical chest pain and dyspnea for 6 months. A rest Tc-MIBI myocardial SPECT imaging and a F-FDG myocardial PET/CT imaging were performed, which showed multiple matched myocardial perfusion/metabolism defects in the left ventricle, indicating scar tissue. Surprisingly, subsequent contrast coronary angiography revealed no significant coronary artery stenosis.
March 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28314613/improved-image-quality-with-simultaneously-reduced-radiation-exposure-knowledge-based-iterative-model-reconstruction-algorithms-for-coronary-ct-angiography-in-a-clinical-setting
#13
Florian André, Philipp Fortner, Mani Vembar, Dirk Mueller, Wolfram Stiller, Sebastian J Buss, Hans-Ulrich Kauczor, Hugo A Katus, Grigorios Korosoglou
BACKGROUND: The aim of this study was to assess the potential for radiation dose reduction using knowledge-based iterative model reconstruction (K-IMR) algorithms in combination with ultra-low dose body mass index (BMI)-adapted protocols in coronary CT angiography (coronary CTA). METHODS: Forty patients undergoing clinically indicated coronary CTA were randomly assigned to two groups with BMI-adapted (I: <25.0 kg/m(2), II: <28.0 kg/m(2), III: <30.0 kg/m(2), IV: ≥30...
February 23, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28306544/acute-ischemic-stroke-mimicking-subarachnoid-hemorrhage-after-coronary-angioplasty
#14
Ana Pršić, Tomislav Šipić, Krešimr Štambuk, Hrvoje Budinčević
Use of non-ionic contrast media (CM) in coronary arteriography has been reported to cause transient cortical blindness, confusion, amnesia and very rare focal deficits. We report a 69-year old patient with stabile angina pectoris who underwent coronary angioplasty with stent placement due to in-stent thrombosis of the right coronary artery who developed stroke symptoms with radiological suspicion of subarachnoid hemorrhage. No vascular malformations were detected on CT cerebral angiography. Dual antiplatelet treatment was continued...
March 16, 2017: Romanian Journal of Internal Medicine, Revue Roumaine de Médecine Interne
https://www.readbyqxmd.com/read/28303473/incremental-role-of-resting-myocardial-computed-tomography-perfusion-for-predicting-physiologically-significant-coronary-artery-disease-a-machine-learning-approach
#15
Donghee Han, Ji Hyun Lee, Asim Rizvi, Heidi Gransar, Lohendran Baskaran, Joshua Schulman-Marcus, Bríain Ó Hartaigh, Fay Y Lin, James K Min
BACKGROUND: Evaluation of resting myocardial computed tomography perfusion (CTP) by coronary CT angiography (CCTA) might serve as a useful addition for determining coronary artery disease. We aimed to evaluate the incremental benefit of resting CTP over coronary stenosis for predicting ischemia using a computational algorithm trained by machine learning methods. METHODS: 252 patients underwent CCTA and invasive fractional flow reserve (FFR). CT stenosis was classified as 0%, 1-30%, 31-49%, 50-70%, and >70% maximal stenosis...
March 16, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28296294/electrocardiogram-gated-coronary-ct-angiography-dose-estimates-using-impact
#16
Masanao Kobayashi, Yasuki Asada, Kosuke Matsubara, Shouichi Suzuki, Kichiro Koshida, Yuta Matsunaga, Tomonobu Haba, Ai Kawaguchi, Hiroshi Toyama, Ryoichi Kato
The primary study objective was to assess radiation doses using a modified form of the Imaging Performance Assessment of Computed Tomography (CT) scanner (ImPACT) patient dosimetry for cardiac applications on an Aquilion ONE ViSION Edition scanner, including the Ca score, target computed tomography angiography (CTA), prospective CTA, continuous CTA/cardiac function analysis (CFA), and CTA/CFA modulation. Accordingly, we clarified the CT dose index (CTDI) to determine the relationship between heart rate (HR) and X-ray exposure...
July 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28293007/-dual-left-anterior-descending-coronary-artery-report-of-a-case
#17
Soujiro Amamoto, Masaru Yoshikai, Takahiro Miho, Kiyokazu Koga
A 77-year-old male presented with angina pectoris. On coronary angiography, the left anterior descending artery(LAD) was obstructed after branching the second septal branch. Three-dimensional (3D) images constructed with 64-slice computed tomography (CT) showed type I dual LAD. The short LAD, which had been erroneously recognized as a septal branch on coronary angiography, ran on the anterior interventricular sulcus (AIVS) where it then terminated. The long LAD, which was obstructed at its origin, ran on the left ventricular side of the AIVS, and entered the distal part of the AIVS...
March 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28293003/-surgical-repair-of-coronary-pulmonary-artery-fistulae-with-giant-coronary-aneurysm
#18
Naoki Hashiyama, Yusuke Katayama, Makoto Mo, Munetaka Masuda
A 69-year-old woman was referred to our hospital due to dyspnea on exertion and a heart murmur. A chest X-ray showed a bulge at the left 3rd arch and chest computed tomography( CT) revealed a giant mass adjacent to the right ventricular outflow. Multidetector-row CT and coronary angiography showed a giant coronary aneurysm (55×45 mm) and fistulae arising from the left main coronary trunk and entering into the main pulmonary artery (PA). The pulmonary to systemic flow ratio was 1.84. She was diagnosed with coronary-pulmonary artery fistulae with giant coronary aneurysm...
March 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28292858/predictive-value-of-age-and-sex-specific-nomograms-of-global-plaque-burden-on-coronary-computed-tomography-angiography-for-major-cardiac-events
#19
Christopher Naoum, Daniel S Berman, Amir Ahmadi, Philipp Blanke, Heidi Gransar, Jagat Narula, Leslee J Shaw, Leonard Kritharides, Stephan Achenbach, Mouaz H Al-Mallah, Daniele Andreini, Matthew J Budoff, Filippo Cademartiri, Tracy Q Callister, Hyuk-Jae Chang, Kavitha Chinnaiyan, Benjamin Chow, Ricardo C Cury, Augustin DeLago, Allison Dunning, Gudrun Feuchtner, Martin Hadamitzky, Joerg Hausleiter, Philipp A Kaufmann, Yong-Jin Kim, Erica Maffei, Hugo Marquez, Gianluca Pontone, Gilbert Raff, Ronen Rubinshtein, Todd C Villines, James Min, Jonathon Leipsic
BACKGROUND: Age-adjusted coronary artery disease (CAD) burden identified on coronary computed tomography angiography predicts major adverse cardiovascular event (MACE) risk; however, it seldom contributes to clinical decision making because of a lack of nomographic data. We aimed to develop clinically pragmatic age- and sex-specific nomograms of CAD burden using coronary computed tomography angiography and to validate their prognostic use. METHODS AND RESULTS: Patients prospectively enrolled in phase I of the CONFIRM registry (Coronary CT Angiography Evaluation for Clinical Outcomes) were included (derivation cohort: n=21,132; 46% female) to develop CAD nomograms based on age-sex percentiles of segment involvement score (SIS) at each year of life (40-79 years)...
March 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28291663/acc-aats-aha-ase-asnc-scai-scct-sts-2017-appropriate-use-criteria-for-coronary-revascularization-in-patients-with%C3%A2-stable-ischemic-heart%C3%A2-disease-a-report-of-the-american-college-of-cardiology-appropriate-use-criteria-task-force-american-association-for-thoracic
#20
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