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Cardiac computed tomography angiography

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https://www.readbyqxmd.com/read/29237046/exposure-to-contrast-media-in-the-perioperative-period-confers-no-additional-risk-of-acute-kidney-injury-in-surgical-patients
#1
Ian Zealley, Huan Wang, Peter T Donnan, Samira Bell
Background: Iodinated contrast media (CM) used in angiography and computed tomography (CT) scans is an important cause of acute kidney injury (AKI) in hospitalized patients undergoing surgery. Contrast-induced nephropathy leads to AKI soon after CM administration. The aim of the study was to determine whether the timing of contrast media exposure related to diagnostic imaging during the immediate perioperative period influences the risk of post-operative AKI. Methods: All patients aged 18 years or above who underwent diagnostic imaging within 7 days of non-cardiac surgery between 1 January 2003 and 31 December 2013 in the Tayside region of Scotland, UK were included in the analysis...
December 9, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29233632/rationale-and-design-of-the-worldwide-prospective-multicenter-registry-on-radiation-dose-estimates-of-cardiac-ct-angiography-in-daily-practice-in-2017-protection-vi
#2
Thomas J Stocker, Simon Deseive, Marcus Chen, Jonathon Leipsic, Martin Hadamitzky, Ronen Rubinshtein, Erik L Grove, Xiang-Ming Fang, John Lesser, Pál Maurovich-Horvat, Hugo Marques, Daniele Andreini, Ramzi Tabbalat, Joon-Won Kang, Joachim Eckert, Patricia Dickson, Signe H Forsdahl, Jess Lambrechtsen, Roberto C Cury, Jörg Hausleiter
BACKGROUND: Cardiac computed tomography angiography (cardiac CTA) is an increasingly used versatile imaging method to evaluate coronary and cardiac morphology. Owing to improvements in technology, image quality has continuously improved over the last 10-20 years. At the same time, numerous non-randomized and randomized studies have been performed to reduce the associated radiation exposure. Currently, it is unclear if the advances in technology and knowledge about radiation reduction translated into reduced levels of cardiac CTA radiation dose in daily clinical practice as well as a wide utilization of dose-saving strategies...
December 5, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29231013/-diagnostic-value-of-postmortem-ct-angiography-in-coronary-atherosclerosis
#3
H Qian, Y Shao, Z D Li, D H Zou, Z Q Qin, L Wan, Y J Chen
OBJECTIVES: To explore the application value of postmortem computed tomography (CT) angiography on diagnosis of coronary atherosclerotic stenosis degree. METHODS: Based on the previous experimental results, the postmortem CT angiography device of human isolated heart was improved. Different coronary atherosclerotic stenosis degree of sudden death cases was selected. Before the cardiac anatomy, hearts were removed out completely and CT angiography was performed immediately...
April 2017: Fa Yi Xue za Zhi
https://www.readbyqxmd.com/read/29222954/evaluation-of-motion-artifact-metrics-for-coronary-ct-angiography
#4
Hongfeng Ma, Eric Gros, Aniko Szabo, Scott G Baginski, Zachary R Laste, Naveen M Kulkarni, Darin Okerlund, Taly G Schmidt
PURPOSE: This study quantified the performance of coronary artery motion artifact metrics relative to human observer ratings. Motion artifact metrics have been used as part of motion correction and best-phase selection algorithms for Coronary Computed Tomography Angiography (CCTA). However, the lack of ground truth makes it difficult to validate how well the metrics quantify the level of motion artifact. This study investigated five motion artifact metrics, including two novel metrics, using a dynamic phantom, clinical CCTA images, and an observer study that provided ground truth motion artifact scores from a series of pairwise comparisons...
December 9, 2017: Medical Physics
https://www.readbyqxmd.com/read/29218817/impact-of-a-shared-decision-making-intervention-on-healthcare-utilization-a-secondary-analysis-of-the-chest-pain-choice-multicenter-randomized-trial
#5
Jason T Schaffer, Erik P Hess, Judd E Hollander, Jeffrey A Kline, Carlos A Torres, Deborah B Diercks, Russell Jones, Kelly P Owen, Zachary F Meisel, Michel Demers, Annie Leblanc, Jonathan Inselman, Jeph Herrin, Victor M Montori, Nilay D Shah
BACKGROUND: Patients at low risk for acute coronary syndrome (ACS) are frequently admitted for observation and cardiac testing, resulting in substantial burden and cost to the patient and the healthcare system. OBJECTIVES: The purpose of this investigation was to measure the effect of the Chest Pain Choice decision aid (CPC) on overall healthcare utilization as well as utilization of specific services both during the index emergency department visit and in the subsequent 45 days...
December 8, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/29216309/coronary-to-pulmonary-artery-fistula-in-adults-evaluation-with-thallium-201-myocardial-perfusion-spect
#6
Seul Ki Lee, Jung Im Jung, Joo Hyun O, Hwan Wook Kim, Ho Joong Youn
OBJECTIVES: With the increasing use of multi-detector CT, the number of detected cases with coronary-to-pulmonary artery fistula (CPAF) has increased. Several previous studies reported severe cases of angina, but no appropriate tests to evaluate myocardial perfusion for patients with CPAF have been established. We evaluated the hemodynamic characteristics of CPAF using thallium-201 (Tl-201) single photon emission computed tomography (SPECT). MATERIALS AND METHODS: Tl-201 SPECT was performed in 17 patients with CPAF, but without evidence of coronary artery disease on coronary computed tomography angiography (CCTA) (age, 58...
2017: PloS One
https://www.readbyqxmd.com/read/29215469/multimodality-coronary-imaging-to-predict-periprocedural-myocardial-necrosis-after-an-elective-percutaneous-coronary-intervention
#7
Masahiro Hoshino, Taishi Yonetsu, Tadashi Murai, Yoshihisa Kanaji, Eisuke Usui, Masao Yamaguchi, Masahiro Hada, Rikuta Hamaya, Yoshinori Kanno, Tetsumin Lee, Tsunekazu Kakuta
BACKGROUND: Although multiple imaging modalities have been tested to predict periprocedural myocardial necrosis (PMN), the superior predictive efficacy of these imaging findings has not been established fully. We sought to evaluate which findings of the coronary imaging tools would best provide predictive efficacy of PMN among optical coherence tomography (OCT), intravascular ultrasound (IVUS), and coronary computed tomography (CCT) angiography. PATIENTS AND METHODS: A total of 130 patients with stable angina pectoris who underwent OCT, IVUS, and CCT examinations for a single de-novo preprocedural lesion were investigated...
December 5, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/29197025/german-cardiac-ct-registry-indications-procedural-data-and-clinical-consequences-in-7061-patients-undergoing-cardiac-computed-tomography
#8
Mohamed Marwan, Stephan Achenbach, Grigorios Korosoglou, Axel Schmermund, Steffen Schneider, Oliver Bruder, Jörg Hausleiter, Stephen Schroeder, Sebastian Barth, Sebastian Kerber, Alexander Leber, Werner Moshage, Jochen Senges
Cardiac computed tomography permits quantification of coronary calcification as well as detection of coronary artery stenoses after contrast enhancement. Moreover, cardiac CT offers high-resolution morphologic and functional imaging of cardiac structures which is valuable for various structural heart disease interventions and electrophysiology procedures. So far, only limited data exist regarding the spectrum of indications, image acquisition parameters as well as results and clinical consequences of cardiac CT examinations using state-of-the-art CT systems in experienced centers...
December 1, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29195843/influence-of-irregular-heart-rhythm-on-radiation-exposure-image-quality-and-diagnostic-impact-of-cardiac-computed-tomography-angiography-in-4-339-patients-data-from-the-german-cardiac-computed-tomography-registry
#9
Grigorios Korosoglou, Mohamed Marwan, Sorin Giusca, Axel Schmermund, Steffen Schneider, Oliver Bruder, Jörg Hausleiter, Stephen Schroeder, Alexander Leber, Tobias Limbourg, Gitsios Gitsioudis, Johannes Rixe, Ralf Zahn, Hugo A Katus, Stephan Achenbach, Jochen Senges
BACKGROUND: Coronary computed tomography angiography (coronary CTA) provides non-invasive evaluation of the coronary arteries with high precision for the detection of significant coronary artery disease (CAD). AIM: To investigate whether irregular heart rhythm including atrial fibrillation and premature beats during data acquisition influences (i) radiation and contrast media exposure, (ii) number of non-evaluable coronary segments and (iii) diagnostic impact of coronary CTA...
November 21, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29194961/computational-simulation-of-postoperative-pulmonary-flow-distribution-in-alagille-patients-with-peripheral-pulmonary-artery-stenosis
#10
Weiguang Yang, Frank L Hanley, Frandics P Chan, Alison L Marsden, Irene E Vignon-Clementel, Jeffrey A Feinstein
BACKGROUND: Up to 90% of individuals with Alagille syndrome have congenital heart diseases. Peripheral pulmonary artery stenosis (PPS), resulting in right ventricular hypertension and pulmonary flow disparity, is one of the most common abnormalities, yet the hemodynamic effects are ill-defined, and optimal patient management and treatment strategies are not well established. The purpose of this pilot study is to use recently refined computational simulation in the setting of multiple surgical strategies, to examine the influence of pulmonary artery reconstruction on hemodynamics in this population...
December 1, 2017: Congenital Heart Disease
https://www.readbyqxmd.com/read/29181046/role-of-dual-source-multidetector-row-cardiac-computed-tomography-angiography-in-diagnosis-and-management-of-congenital-heart-disease-patients
#11
Narumol Chaosuwannakit
Introduction: Primary evaluation of patients with congenital heart disease (CHD) traditionally relies on echocardiography and conventional cardiac angiography (CCA), both of which have potential limitations. Aim: To test the hypothesis that cardiac computed tomography angiography (CCTA) is useful in the diagnosis and management of these patients. Material and methods: The 3-year observational, analytical, retrospective, cohort study included a total of 111 tomographic studies of patients with congenital heart disease...
September 2017: Kardiochirurgia i Torakochirurgia Polska, Polish Journal of Cardio-Thoracic Surgery
https://www.readbyqxmd.com/read/29174452/diagnosing-centrally-located-pulmonary-embolisms-in-the-emergency-department-using-point-of-care-ultrasound
#12
Kristin H Dwyer, Joshua S Rempell, Michael B Stone
OBJECTIVE: The study objective was to investigate the combined accuracy of right heart strain on focused cardiac ultrasound (FOCUS) and deep vein thrombosis (DVT) on compression ultrasound (CUS) for identification of centrally located pulmonary embolism (PE) diagnosed on computed tomography pulmonary angiography (CTPA). METHODS: This was a prospective observational study using a convenience sample of patients undergoing CTPA in the emergency department (ED) for evaluation of PE...
November 14, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29174197/comparison-of-cardiac-measurements-by-multi-detector-computed-tomography-angiography-and-transthoracic-echocardiography-in-english-bulldogs
#13
E T Hostnik, B A Scansen, A M Habing, G A Chiappone, R R Layman, R D White
INTRODUCTION: Transthoracic echocardiography (TTE) is the primary tool for the assessment of cardiac structure and function in dogs but is challenging in English bulldogs due to dorsoventral compression of the thorax, obesity, and narrow intercostal spaces. Multi-detector computed tomography angiography (CTA) may overcome the conformational obstacles of cardiac imaging in this breed. ANIMALS: Eleven client-owned English bulldogs. MATERIALS AND METHODS: Prospective clinical trial with paired analysis of TTE and CTA studies...
November 22, 2017: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/29173759/early-detection-of-lung-cancer-using-ultra-low-dose-computed-tomography-in-coronary-ct-angiography-scans-among-patients-with-suspected-coronary-heart-disease
#14
Matheus Zanon, Gabriel Sartori Pacini, Vinicius Valério Silveiro de Souza, Edson Marchiori, Gustavo Souza Portes Meirelles, Gilberto Szarf, Felipe Soares Torres, Bruno Hochhegger
OBJECTIVES: To assess whether an additional chest ultra-low-dose CT scan to the coronary CT angiography protocol can be used for lung cancer screening among patients with suspected coronary artery disease. METHODS: 175 patients underwent coronary CT angiography for assessment of coronary artery disease, additionally undergoing ultra-low-dose CT screening to early diagnosis of lung cancer in the same scanner (80kVp and 15mAs). Patients presenting pulmonary nodules were followed-up for two years, repeating low-dose CTs in intervals of 3, 6, or 12 months based on nodule size and growth rate in accordance with National Comprehensive Cancer Network guidelines...
December 2017: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/29173670/evaluation-of-chest-pain-and-acute-coronary-syndromes
#15
REVIEW
Anna Marie Chang, David L Fischman, Judd E Hollander
Chest pain is a common complaint in the emergency department, and it is the job of clinicians to rule out life-threatening diagnoses such as acute coronary syndrome. The history, physical examination, cardiac risk factors, electrocardiogram findings, and clinician judgment are often not enough to distinguish between causes of chest pain syndromes and to reliably rule out acute myocardial ischemia. New cardiac troponin assays, especially in conjunction with clinical decision algorithms, help clinicians rapidly exclude acute myocardial infarction...
February 2018: Cardiology Clinics
https://www.readbyqxmd.com/read/29151328/evaluation-of-pulmonary-vein-anatomy-using-256-slice-computed-tomography
#16
Yinghong Shi, Shaohua Mi, Yunxia Shi, Hongbo Wang, Jian Li, Benxia Yu, Fengli Liu, Heng Ma, Bin Wang
Background/aim: This study aimed to evaluate pulmonary vein (PV) anatomy using 256-slice computed tomography (CT), which may be necessary for electrophysiologists to know before radiofrequency catheter ablation (RFCA) therapy.Materials and methods: A total of 102 patients with paroxysmal and persistent atrial fibrillation underwent 256-slice cardiac CT angiography prior to catheter ablation. PV morphology, ostial diameter, ostial orientation, and distance from ostium to first bifurcation were evaluated using three-dimensional volume-rendering and multiplanar-reformatting technology...
November 13, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29151308/unknown-vascular-compression-of-the-airway-in-patients-with-congenitalheart-disease-and-persistent-lower-respiratory-symptoms
#17
Tuğba Şişmanlar Eyüboğlu, Ayşe Tana Aslan, Çiğdem Öztunalı, Sedef Tunaoğlu, Ayşe Deniz Oğuz, Serdar Kula, Betül Derinkuyu, Öznur Boyunağa
Background/aim: Airway compression (AC) by vascular structures is an important complication of congenital heart disease (CHD) that often goes unrecognized. It is not easy to identify whether CHD patients require additional invasive examinations or not. Therefore, the present study aims to develop an AC diagnostic algorithm for CHD patients. Materials and methods: CHD patients with persistent respiratory symptoms that were treated between January 2007 and December 2015 were retrospectively reviewed. The following data were recorded for all CHD patients with AC: age, cardiac anomalies, the compressed structure, the airway diameter ratio (ADR), the compressing structure(s), treatment, and follow-up...
November 13, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29148628/clinical-significance-of-st-depression-at-exercise-stress-testing-in-competitive-athletes-usefulness-of-coronary-ct-during-screening
#18
Fabio Sperandii, Emanuele Guerra, Eliana Tranchita, Carlo Minganti, Chiara Lanzillo, Antonia Nigro, Federico Quaranta, Attilio Parisi, Mauro DI Roma, Luciano Maresca, Federica Fagnani, Leonardo Calò
BACKGROUND: Congenital coronary anomalies (CCAs) and coronary artery disease (CAD) arouse intense scientific and clinical interest in sports medicine and sports cardiology medical communities because of their potential to trigger sudden cardiac death (SCD) in athletes. Exercise stress testing represent the first instrumental assessment to evaluate electrocardiographic changes during effort. Coronary computed tomography angiography (CCTA) is an advanced accurate noninvasive imaging modality for excluding CAD and abnormalities of origin and course of coronary vessels...
November 17, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29145264/influences-of-cardiac-motion-on-computed-tomography-guided-biopsy-of-lung-nodules-located-near-the-heart
#19
Li-Sheng Hsu, Chien-Wei Chen, Chia-Hao Chang, Chien-Han Liao, Sheng-Lung Hsu, Wei-Ming Lin
Computed tomography (CT)-guided lung biopsy of nodules located near the heart may be associated with potential complications. To understand the influences of cardiac motion on lung parenchyma during biopsy, we processed the cardiac phase images of coronary CT angiography (CCTA) and noticed shifts in mediastinum lung margin (MLM) at different zones.Thirty eight CCTA (27 men and 11 women) were retrospectively evaluated. Image processing was done with Fiji (an open source Java image processing program by Fiji contributors) using 10% to 90% phase images of CCTA; and tissue displacement (MLM shift) was shown on the resulting images...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29142490/postoperative-elevated-resistive-indices-do-not-predict-hepatic-artery-thrombosis-in-extended-criteria-donor-livers
#20
Eric J Siskind, Fauzia Vandermeer, Tamar R Siskind, David A Bruno, Samuel Sultan, Josue Alvarez-Casas, Arielle Stafford, Barton Lane, John C Lamattina, Rolf N Barth, Steven I Hanish
Postoperative transplant liver ultrasounds were analyzed in standard criteria donor (SCD), extended criteria donor (ECD), and donation after cardiac death (DCD) liver allografts to determine if elevated resistive indices (RIs) are consistently present and if they are pathological. Postoperative transplant liver ultrasounds were reviewed from 115 consecutive patients. Hepatic arterial RIs were stratified based on the type of donor: DCD, macrosteatosis (>30%), or standard criteria. In all patients with elevated RI, subsequent ultrasounds were reviewed to demonstrate RI normalization...
December 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
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