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https://www.readbyqxmd.com/read/28214966/anomalous-coronary-arteries-and-myocardial-bridges-risk-stratification-in-children-using-novel-cardiac-catheterization-techniques
#1
Hitesh Agrawal, Silvana Molossi, Mahboob Alam, S Kristen Sexson-Tejtel, Carlos M Mery, E Dean McKenzie, Charles D Fraser, Athar M Qureshi
The evaluation of the vast majority of children with anomalous aortic origin of a coronary artery (AAOCA) and/or myocardial bridges is performed with non-invasive testing. However, a subset of these patients may benefit from invasive testing for risk stratification. All patients included in the Coronary Anomalies Program (CAP) at Texas Children's Hospital who underwent cardiac catheterization were included. Techniques included selective coronary angiograms (SCA), intravascular ultrasound (IVUS), and fractional flow reserve (FFR) measurements with provocative testing using adenosine and/or dobutamine infusions...
February 18, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28214424/association-between-plaque-characteristics-and-the-amount-of-debris-captured-by-a-filter-type-distal-protection-device-in-patients-with-acute-coronary-syndrome
#2
Katsuhide Kitagawa, Tetsuya Amano, Tadayuki Uetani, Hideki Ishii, Takahiro Okumura, Susumu Suzuki, Hiroaki Takashima, Akiyoshi Kurita, Hirohiko Ando, Tatsuaki Matsubara, Toyoaki Murohara
BACKGROUND AND AIMS: Disruption of atherosclerotic plaque and distal embolism often cause peri-procedural myocardial injury during percutaneous coronary intervention (PCI). In the present study, we evaluate the association between the characteristics of the target lesion and the amount of debris captured by the filter-type distal protection device. METHODS: We enrolled 120 consecutive patients with acute coronary syndrome, who underwent coronary stent implantation with a filter-type distal protection device after integrated backscatter intravascular ultrasound (IB-IVUS) analysis...
February 8, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28197870/intravascular-ultrasound-guidance-of-percutaneous-coronary-intervention-in-ostial-chronic-total-occlusions-a-description-of-the-technique-and-procedural-results
#3
Nicola Ryan, Nieves Gonzalo, Philip Dingli, Oscar Vedia Cruz, Pilar Jiménez-Quevedo, Luis Nombela-Franco, Ivan Nuñez-Gil, María Del Trigo, Pablo Salinas, Carlos Macaya, Antonio Fernandez-Ortiz, Javier Escaned
Inability to cross the lesion with a guidewire is the most common reason for failure in percutaneous revascularization (PCI) of chronic total occlusions (CTOs). An ostial or stumpless CTO is an acknowledged challenge for CTO recanalization due to difficulty in successful wiring. IVUS imaging provides the opportunity to visualize the occluded vessel and to aid guidewire advancement. We review the value of this technique in a single-centre experience of CTO PCI. This series involves 22 patients who underwent CTO-PCI using IVUS guidance for stumpless CTO wiring at our institution...
February 14, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28191713/tissue-characterization-and-phenotype-classification-in-patients-presenting-with-acute-myocardial-infarction-insights-from-the-iwonder-study
#4
Cristiano F Souza, Akiko Maehara, Gary S Mintz, Mitsuaki Matsumura, Claudia M R Alves, Antonio Carlos Carvalho, Adriano Caixeta
OBJECTIVES: We sought to assess a new modality of radiofrequency intravascular ultrasound (IVUS) called iMAP-IVUS (Boston Scientific, Santa Clara, California) during the evaluation of patients presenting with high-risk acute coronary syndromes. BACKGROUND: There are limited data on plaque tissue characterization and phenotype classification using iMAP-IVUS. METHODS: In the iWonder study patients presenting with ST-elevation myocardial infarction (STEMI) or non-STEMI underwent three-vessel grayscale IVUS and iMAP-IVUS tissue characterization prior to percutaneous intervention...
February 13, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28187174/hyperglycemia-effect-on-coronary-disease-in-patients-with-metabolic-syndrome-evaluated-by-intracoronary-ultrasonography
#5
Beatriz Dal Santo Francisco Bonamichi, Erika Bezerra Parente, Ana Carolina Noronha Campos, Adriano Namo Cury, João Eduardo Nunes Salles
INTRODUCTION: Metabolic syndrome (MS) is characterized by dyslipidemia, central obesity, hypertension and hyperglycemia. However, type 2 diabetes mellitus (T2DM) may or may not be present in metabolic syndrome. MS and T2DM are considered important cardiovascular risk factors, but the role of hyperglycemia in coronary disease is still contested in the literature. Therefore, we decided to evaluate the effect of hyperglycemia on the severity of coronary disease in MS patients, with or without T2DM, submitted to coronary angiography (CA) and intravascular ultrasonography (IVUS)...
2017: PloS One
https://www.readbyqxmd.com/read/28177655/iterative-image-reconstruction-improves-the-accuracy-of-automated-plaque-burden-assessment-in-coronary-ct-angiography-a-comparison-with-intravascular-ultrasound
#6
Stefan B Puchner, Maros Ferencik, Akiko Maehara, Paul Stolzmann, Shixin Ma, Synho Do, Hans-Ulrich Kauczor, Gary S Mintz, Udo Hoffmann, Christopher L Schlett
OBJECTIVE: The purpose of this study was to determine whether use of iterative image reconstruction algorithms improves the accuracy of coronary CT angiography (CCTA) compared with intravascular ultrasound (IVUS) in semiautomated plaque burden assessment. MATERIALS AND METHODS: CCTA and IVUS images of seven coronary arteries were acquired ex vivo. CT images were reconstructed with filtered back projection (FBP) and adaptive statistical (ASIR) and model-based (MBIR) iterative reconstruction algorithms...
February 8, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28169175/in%C3%A2-vivo-coronary-lesion-differentiation-with-computed-tomography-angiography-and-intravascular-ultrasound-as-compared-to-optical-coherence-tomography
#7
Wouter G Wieringa, Chris P H Lexis, Erik Lipsic, Hindrik W van der Werf, Johannes G M Burgerhof, Vincent E Hagens, G Louis Bartels, Alexander Broersen, Remco A Schurer, Eng-Shiong Tan, Pim van der Harst, Ad F M van den Heuvel, Tineke P Willems, Gabija Pundziute
BACKGROUND: In vitro studies have shown the feasibility of coronary lesion grading with computed tomography angiography (CTA), intravascular ultrasound (IVUS) and optical coherence tomography (OCT) as compared to histology, whereas OCT had the highest discriminatory capacity. OBJECTIVE: We investigated the ability of CTA and IVUS to differentiate between early and advanced coronary lesions in vivo, OCT serving as standard of reference. METHODS: Multimodality imaging was prospectively performed in 30 NSTEMI patients...
January 22, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28164672/circulating-endothelial-progenitor-cells-were-increased-in-patients-with-thin-cap-fibroatheroma
#8
Qiang Tan, Qingsheng Wang, Shuangyue Zhang, Ximing Qi, Yang Li
BACKGROUND: We used virtual histology-intravascular ultrasound (VH-IVUS) to evaluate the relationship between circulating endothelial progenitor cells (EPC) and thin-cap fibroatheroma (TCFA). METHODS: This study included 52 patients with unstable angina who underwent coronary angiography and IVUS examination. Patients were divided into a TCFA group (n = 21) or a non-TCFA group (n = 31) based on VH-IVUS performance. Before angiography, peripheral blood levels of EPC were measured by flow cytometry...
November 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28154609/reconstruction-of-intima-and-adventitia-models-into-a-state-undeformed-by-a-catheter-by-using-ct-ivus-and-biplane-x-ray-angiogram-images
#9
Jinwon Son, Young Choi
The number of studies on blood flow analysis using fluid-structure interaction (FSI) analysis is increasing. Though a 3D blood vessel model that includes intima and adventitia is required for FSI analysis, there are difficulties in generating it using only one type of medical imaging. In this paper, we propose a 3D modeling method for accurate FSI analysis. An intravascular ultrasound (IVUS) image is used with biplane X-ray angiogram images to calculate the position and orientation of the blood vessel. However, these images show that the blood vessel is deformed by the catheter inserted into the blood vessel for IVUS imaging...
2017: Computational and Mathematical Methods in Medicine
https://www.readbyqxmd.com/read/28154268/heterogeneous-intravascular-ultrasound-findings-of-stent-thrombosis
#10
Toru Morofuji, Shinji Inaba, Hiroe Aisu, Kayo Takahashi, Makoto Saito, Haruhiko Higashi, Toyofumi Yoshii, Takumi Sumimoto
Objective The underlying mechanisms of stent thrombosis are not completely understood. Methods We experienced 12 definite stent thrombosis cases (1 early, 1 late, and 10 very late) at our hospital from July 2011 to April 2016 and evaluated the possible causes of stent thrombosis by intravascular ultrasound (IVUS). Results Five different potential morphological causes of stent thrombosis (neoatherosclerosis, stent malapposition, stent fracture, edge dissection, and stent underexpansion) were detected by IVUS in 10 cases (83...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28148771/oscillatory-wall-shear-stress-is-a-dominant-flow-characteristic-affecting-lesion-progression-patterns-and-plaque-vulnerability-in-patients-with-coronary-artery-disease
#11
Lucas H Timmins, David S Molony, Parham Eshtehardi, Michael C McDaniel, John N Oshinski, Don P Giddens, Habib Samady
Although experimental studies suggest that low and oscillatory wall shear stress (WSS) promotes plaque transformation to a more vulnerable phenotype, this relationship has not been examined in human atherosclerosis progression. Thus, the aim of this investigation was to examine the association between oscillatory WSS, in combination with WSS magnitude, and coronary atherosclerosis progression. We hypothesized that regions of low and oscillatory WSS will demonstrate progression towards more vulnerable lesions, while regions exposed to low and non-oscillatory WSS will exhibit progression towards more stable lesions...
February 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28124747/intermediate-analysis-of-magnesium-alloy-covered-stent-for-a-lateral-aneurysm-model-in-the-rabbit-common-carotid-artery
#12
Hong-Kai Cui, Fen-Bao Li, Ying-Chang Guo, Yong-Li Zhao, Rui-Fang Yan, Wu Wang, Yong-Dong Li, Yong-Li Wang, Guang-Yin Yuan
OBJECTIVE: To analyze the outcomes of a magnesium alloy covered stent (MACS) for a lateral aneurysm model in common carotid artery (CCA). METHODS: In 32 rabbits, a MACS (group A, n = 17) or a Willis covered stent (WCS; group B, n = 15) was inserted and the rabbits were sacrificed 1, 3, 6, or 12 months after stenting. Angiography and intravascular ultrasound (IVUS) were performed at 3, 6, and 12 months. Scanning electron microscopy was performed for six stents in each group at 1, 3, and 6 months, and histopathology and histomorphology were conducted at 3 (n = 4), 6 (n = 4), and 12 (n = 12) months...
January 26, 2017: European Radiology
https://www.readbyqxmd.com/read/28120559/the-effect-of-sex-and-anthropometry-on-clinical-outcomes-in-patients-undergoing-percutaneous-coronary-intervention-for-complex-coronary-lesions
#13
Seung Yul Lee, Dong Ho Shin, Jung Sun Kim, Byeong Keuk Kim, Young Guk Ko, Donghoon Choi, Yangsoo Jang, Myeong Ki Hong
PURPOSE: To evaluate the effects of sex and anthropometry on clinical outcomes in patients who underwent percutaneous coronary intervention (PCI). MATERIALS AND METHODS: From three randomized trials (REal Safety and Efficacy of 3-month dual antiplatelet Therapy following Endeavor zotarolimus-eluting stent implantation, Impact of intraVascular UltraSound guidance on outcomes of Xience Prime stents in Long lesions, Chronic Total Occlusion InterVention with drUg-eluting Stents), we compared 333 pairs of men and women matched by propensity scores, all of whom underwent intravascular ultrasound (IVUS)-guided PCI for complex lesions...
March 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28118185/comparison-of-plaque-morphology-between-peripheral-and-coronary-artery-disease-from-the-clarity-and-adapt-des-ivus-substudies
#14
Da Yin, Mitsuaki Matsumura, John Rundback, Jason A Yoho, Bernhard Witzenbichler, Gregg W Stone, Gary S Mintz, Akiko Maehara
OBJECTIVE: The aim of this study was to help understand the different outcomes when treating peripheral arterial disease (PAD) versus coronary artery disease (CAD). We compared plaque morphology between PAD and CAD using intravascular ultrasound. METHODS: Complete Lesion Assessment with ffR and IVUS TechnologY (CLARITY) was a prospective, multicenter trial that enrolled 50 PAD patients with a lower extremity wound fed by a tibial or a peroneal artery with diameter stenosis more than 50%...
January 21, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28115812/ivus-guided-implantation-of-bioresorbable-vascular-scaffolds-for-very-late-paclitaxel-stent-thrombosis
#15
Zhe-Zhong Lin, Wei-Ting Chang, Chun-Yen Chiang, Zhih-Cherng Chen, Po-Ming Ku
Bioresorbable vascular scaffold (BVS) implantation has been shown to be safe in patients with stable coronary disease, and effective against the thrombotic lesion and the in-stent restenosis (ISR) of the drug-eluting stent (DES). BVSs have the advantages of a snow racket concept, positive vessel remodeling, and better conformability compared with DES in acute coronary syndrome (ACS). We report on a young patient with ST-elevation myocardial infarction (STEMI) who presented to our emergency department arising from very late stent thrombosis (VLST) of a 2...
January 2017: Acta Cardiologica Sinica
https://www.readbyqxmd.com/read/28113313/real-time-intravascular-ultrasound-and-photoacoustic-imaging
#16
Don VanderLaan, Andrei Karpiouk, Doug Yeager, Stanislav Emelianov
Combined intravascular ultrasound and photoacoustic imaging (IVUS/IVPA) is an emerging hybrid modality being explored as a means of improving the characterization of atherosclerotic plaque anatomical and compositional features. While initial demonstrations of the technique have been encouraging, they have been limited by catheter rotation and data acquisition, displaying and processing rates on the order of several seconds per frame as well as the use of off-line image processing. Herein, we present a complete IVUS/IVPA imaging system and method capable of real-time IVUS/IVPA imaging, with online data acquisition, image processing and display of both IVUS and IVPA images...
December 15, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28109718/lipid-core-burden-response-to-stent-implantation-assessed-with-near-infrared-spectroscopy-and-intravascular-ultrasound-evaluation-in-patients-with-myocardial-infarction
#17
Manijeh Noori, Per Thayssen, Karsten Tange Veien, Anders Junker, Knud Nørregaard Hansen, Henrik Steen Hansen, Lisette Okkels Jensen
INTRODUCTION: Near-infrared spectroscopy (NIRS) is a new method to identify lipid core plaque (LCP). The LCP and vascular response were assessed with NIRS to examine whether LCP was compressed or redistributed during percutaneous coronary intervention with stent implantation. METHODS: In 25 patients with non-ST segment elevation myocardial infarction (NSTEMI) NIRS acquisition was performed after predilation, stent implantation with nominal pressure and high-pressure post-dilation with a non-compliant balloon...
December 27, 2016: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28107355/assessment-of-inter-expert-variability-and-of-an-automated-segmentation-method-of-40-and-60-mhz-ivus-images-of-coronary-arteries
#18
François Destrempes, Marie-Hélène Roy Cardinal, Yoshifumi Saijo, Gérard Finet, Jean-Claude Tardif, Guy Cloutier
The objectives were to compare the performance of a segmentation algorithm, based on the minimization of an uncertainty function, to delineate contours of external elastic membrane and lumen of human coronary arteries imaged with 40 and 60 MHz IVUS, and to use values of this function to delineate portions of contours with highest uncertainty. For 8 patients, 40 and 60 MHz IVUS coronary data acquired pre- and post-interventions were used, for a total of 68,516 images. Manual segmentations of contours (on 2312 images) performed by experts at three core laboratories were the gold-standards...
2017: PloS One
https://www.readbyqxmd.com/read/28105996/coronary-artery-pseudoaneurysm-formed-after-stuck-rotablator-ivus-and-mdct-findings
#19
Umihiko Kaneko, Yoshifumi Kashima, Daitaro Kanno, Tsutomu Fujita
No abstract text is available yet for this article.
January 20, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28104208/first-in-human-evaluation-of-a-novel%C3%A2-polymer-free-drug-filled-stent-angiographic-ivus-oct-and-clinical-outcomes-from%C3%A2-the%C3%A2-revelution-study
#20
Stephen G Worthley, Alexandre Abizaid, Ajay J Kirtane, Daniel I Simon, Stephan Windecker, Sandeep Brar, Ian T Meredith, Sharad Shetty, Ajay Sinhal, Alexandra Popma Almonacid, Daniel Chamié, Akiko Maehara, Gregg W Stone
OBJECTIVES: This study sought to assess the safety and effectiveness of the drug-filled stent (DFS) (Medtronic, Santa Rosa, California) in the treatment of patients with coronary artery disease. BACKGROUND: Polymer-free drug-eluting stents have the potential to improve clinical outcomes and facilitate shorter durations of dual antiplatelet therapy. The polymer-free DFS is made from a trilayered continuous wire with an outer cobalt chromium layer, a middle tantalum layer, and an inner lumen coated with sirolimus...
January 23, 2017: JACC. Cardiovascular Interventions
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