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Intravascular ultrasound

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https://www.readbyqxmd.com/read/28521932/discordance-between-fractional-flow-reserve-and-coronary-flow-reserve-insights-from-intracoronary-imaging-and-physiological%C3%A2-assessment
#1
Sung Gyun Ahn, Jon Suh, Olivia Y Hung, Hee Su Lee, Yasir H Bouchi, Wenjie Zeng, Rounak Gandhi, Parham Eshtehardi, Bill D Gogas, Habib Samady
OBJECTIVES: The aim of this study was to investigate the epicardial and microvascular substrates associated with discordances between fractional flow reserve (FFR) and coronary flow reserve (CFR) values. BACKGROUND: Discordances between FFR and CFR remain poorly characterized. METHODS: FFR, hyperemic stenosis resistance (HSR), and intravascular ultrasound were performed as indexes of epicardial function and CFR and hyperemic microvascular resistance (HMR) as measures of microvascular function in 94 patients with moderate coronary stenosis...
May 22, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28521919/intravascular-ultrasound-analysis-of-intraplaque-versus-subintimal-tracking-in-percutaneous-intervention-for-coronary-chronic-total-occlusions-and-association-with-procedural-outcomes
#2
Lei Song, Akiko Maehara, Matthew T Finn, Sanjog Kalra, Jeffrey W Moses, Manish A Parikh, Ajay J Kirtane, Michael B Collins, Tamim M Nazif, Khady N Fall, Raja Hatem, Ming Liao, Tiffany Kim, Philip Green, Ziad A Ali, Candido Batres, Martin B Leon, Gary S Mintz, Dimitri Karmpaliotis
OBJECTIVES: Using intravascular ultrasound (IVUS), the authors compared outcomes by observed wire position (intraplaque vs. subintimal) achieved during successful chronic total occlusion (CTO) lesion treatment. BACKGROUND: Recent successes in CTO percutaneous coronary intervention (PCI) have used both intraluminal and subintimal wire tracking to improve procedural success. IVUS may be used to determine the course of wire tracking after crossing a CTO. METHODS: From March 2014 to March 2016, data were collected into a single-center database from 219 patients undergoing CTO PCI with concomitant IVUS imaging...
May 22, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28515854/determinants-of-percutaneous-coronary-intervention-success-in-repeat-chronic-total-occlusion-procedures-following-an-initial-failed-attempt
#3
Cecilia Cuevas, Nicola Ryan, Alicia Quirós, Juan Gustavo Del Angel, Nieves Gonzalo, Pablo Salinas, Pilar Jiménez-Quevedo, Luis Nombela-Franco, Ivan Nuñez-Gil, Antonio Fernandez-Ortiz, Carlos Macaya, Javier Escaned
AIM: To investigate the rates and determinants of success of repeat percutaneous coronary intervention (PCI) following an initial failed attempt at recanalising the chronic total occlusions (CTO) percutaneously. METHODS: In 445 consecutive first attempt CTO-PCI procedures in our institution, procedural failure occurred in 149 (33.5%). Sixty-four re-PCI procedures were performed in 58 patients (39%) all had a single CTO. Procedural and outcome data in the re-PCI population was entered into the institutional database...
April 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28515407/comparison-of-the-outback-%C3%A2-elite-reentry-catheter-and-the-bi-directional-approach-after-failed-antegrade-approach-for-femoro-popliteal-occlusive-disease
#4
Daizo Kawasaki, Masashi Fukunaga, Tsuyoshi Nakata, Masaaki Kato, Nobukazu Ohkubo
AIM: A successful antegrade wire crossing for femoro-popliteal chronic total occlusion (FP-CTO) is still a technical challenge. We attempted to demonstrate the safety and feasibility of the OUTBACK(®) Elite reentry catheter and the bi-directional approach for failed FP-CTO cases with the antegrade approach. METHODS: Endovascular therapy for FP-CTO was performed in 219 lesions from May 2013 to December 2016 at Morinomiya Hospital. We retrospectively analyzed the data of 43 consecutive lesions which underwent endovascular therapy using the bi-directional approach with distal access and the mono-directional approach with the OUTBACK(®) Elite reentry catheter for FP-CTO lesions...
May 17, 2017: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/28515369/effect-of-reverse-vessel-remodeling-on-regression-of-coronary-atherosclerosis-in-patients-treated-with-aggressive-lipid-and-blood-pressure-lowering-therapy%C3%A3-insight-from-million-study
#5
Tadatsugu Gamou, Kenji Sakata, Hayato Tada, Tetsuo Konno, Kenshi Hayashi, Hidekazu Ino, Masakazu Yamagishi, Masa-Aki Kawashiri
BACKGROUND: The MILLION study, a prospective randomized multicenter study, revealed that lipid and blood pressure (BP)-lowering therapy resulted in regression of coronary plaque as determined by intravascular ultrasound (IVUS). In the present study we performed additional analysis to investigate the associated factors with regression of coronary plaque.Methods and Results:We investigated serial 3D IVUS images from 68 patients in the MILLION study. Standard IVUS parameters were assessed at both baseline and follow-up (18-24 months)...
May 17, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28514894/successful-repair-of-acute-type-b-and-retrograde-type-a-aortic-dissection-with-kidney-ischemia
#6
Jeko M Madjarov, Michael G Katz, Hector Crespo-Soto, Svetozar Madzharov, Timothy Roush, Francis Robicsek
Acute dissection of thoracic aorta carries a risk of renal ischemia followed by the development of a kidney failure. The optimal surgical and nonsurgical management of these patients, timing of intervention, and the factors predicting renal recovery are not well delineated and remain controversial. We present a case of acute type B thoracic aortic dissection with left kidney ischemia. Evaluation of renal function was performed by the means of internationally accepted Risk, Injury, Failure, Loss of kidney function, End stage kidney disease and Acute Kidney Injury Network classifications for acute kidney injury, renal duplex sonography, and intravascular ultrasound that demonstrated left renal artery dissection with a flap completely compressing the true lumen...
January 1, 2017: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28506641/guiding-multimodal-registration-with-learned-optimization-updates
#7
Benjamin Gutierrez-Becker, Diana Mateus, Loic Peter, Nassir Navab
In this paper, we address the multimodal registration problem from a novel perspective, aiming to predict the transformation aligning images directly from their visual appearance. We formulate the prediction as a supervised regression task, with joint image descriptors as input and the output are the parameters of the transformation that guide the moving image towards alignment. We model the joint local appearance with context aware descriptors that capture both local and global cues simultaneously in the two modalities, while the regression function is based on the gradient boosted trees method capable of handling the very large contextual feature space...
May 6, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28505064/changes-in-renal-artery-dimensions-are-associated-with-clinical-response-to-radiofrequency-renal-denervation-a-series-of-studies-using-quantitative-angiography-and-intravascular-ultrasound
#8
Thomas Weber, Jörg Kellermair, Karen T Witberg, Jurgen Ligthart, Robert J Melder, Thomas Forstner, Bernd Eber
OBJECTIVE: Renal denervation (RDN) can cause focal (notches) and global (spasms) changes in renal artery dimensions. We quantified these changes and related them to renal norepinephrin tissue content in animals and to blood pressure (BP) changes in patients. METHODS: We measured renal artery dimensions pre-RDN and post-RDN, utilizing quantitative renal angiography (QRA) in a porcine model and in a retrospective patient cohort, and intravascular ultrasound (IVUS) in a prospective patient cohort...
May 12, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28504955/three-dimensional-intravascular-reconstruction-techniques-based-on-intravascular-ultrasound-a-technical-review
#9
Chaoyang Shi, Xiongbiao Luo, Jin Guo, Zoran Najdovski, Toshio Fukuda, Hongliang Ren
Intravascular ultrasound (IVUS) imaging provides two-dimensional (2D) real-time luminal and transmural cross-sectional images of intravascular vessels with detailed pathological information. It has offered significant advantages in terms of diagnosis and guidance and has been increasingly introduced from coronary interventions into more generalized endovascular surgery. However, IVUS itself does not provide spatial pose information for its generated images, making it difficult to construct a 3D intravascular visualization...
May 12, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28504218/first-in-human-evaluation-of-a-novel-poly-l-lactide-based-sirolimus-eluting-bioresorbable-vascular-scaffold-for-the-treatment-of-de-novo-native-coronary-artery-lesions-meres-1-trial
#10
Ashok Seth, Yoshinobu Onuma, Ricardo Costa, Praveen Chandra, Vinay K Bahl, Cholenahally N Manjunath, Ajaykumar U Mahajan, Viveka Kumar, Pravin K Goel, Gurpreet S Wander, Mathew S Kalarickal, Upendra Kaul, V K Ajit Kumar, Pratap C Rath, Vijay Trehan, Gunasekaran Sengottuvelu, Sundeep Mishra, Alexandre Abizaid, Patrick W Serruys
AIMS: The MeRes-1 trial sought to study the safety and effectiveness of a novel sirolimus-eluting bioresorbable vascular scaffold (MeRes100 BRS) in treating de novo native coronary artery lesions by clinical evaluation and using multiple imaging modalities. METHODS AND RESULTS: The MeRes-1 first-in-human trial was a single-arm, prospective, multicentre study, which enrolled 108 patients with de novo coronary artery lesions (116 scaffolds were deployed to treat 116 lesions in 108 patients)...
May 16, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28504047/intravascular-ultrasound-validation-of-contemporary-angiographic-scores-evaluating-the-severity-of-calcification-in-peripheral-arteries
#11
Da Yin, Akiko Maehara, Thomas M Shimshak, Joseph J Ricotta, Venkatesh Ramaiah, Malcolm T Foster, Thomas P Davis, Mitsuaki Matsumura, Gary S Mintz, William A Gray
PURPOSE: To validate 3 angiographic scoring systems for peripheral artery calcification using intravascular ultrasound (IVUS) as the gold standard. METHODS: The study employed preprocedure angiography and IVUS data from 47 patients (median age 72 years; 34 men) in the 55-patient JetStream G3 Calcium Study ( ClinicalTrials.gov identifier NCT01273623) to validate the 3 angiographic scoring systems [Peripheral Academic Research Consortium (PARC), Peripheral Arterial Calcium Scoring System (PACSS), and the DEFINITIVE Ca(++) trial]...
May 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28502889/three-dimensional-printing-facilitates-successful-endovascular-closure-of-a-type-ii-abernethy-malformation-using-an-amplatzer-atrial-septal-occluder-device
#12
Jeffrey Forris Beecham Chick, Shilpa N Reddy, Alice C Yu, Tatiana Kelil, Ravi N Srinivasa, Kyle J Cooper, Wael E Saad
Type II Abernethy malformations, characterized by side-to-side portosystemic shunting with preserved intrahepatic portal venous system, have been treated with shunt closure surgically and endovascularly. Three-dimensional printing has been used to develop highly accurate patient-specific representations for surgical and endovascular planning and intervention. This innovation describes three-dimensional printing to successfully close a flush-oriented type II Abernethy malformation, with discrepant dimensions on computed tomography, conventional venography, and intravascular ultrasound, using a 12-mm AMPLATZER atrial septal occluder device...
May 11, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28502498/mature-proprotein-convertase-subtilisin-kexin-type-9-coronary-atheroma-burden-and-vessel-remodeling-in-heterozygous-familial-hypercholesterolemia
#13
Yu Kataoka, Mariko Harada-Shiba, Kazuhiro Nakao, Takahiro Nakashima, Shoji Kawakami, Masashi Fujino, Tomoaki Kanaya, Toshiyuki Nagai, Yoshio Tahara, Yasuhide Asaumi, Mika Hori, Masatsune Ogura, Yoichi Goto, Teruo Noguchi, Satoshi Yasuda
BACKGROUND: Proprotein convertase subtilisin/kexin type 9 (PCSK9), an important contributor to low-density lipoprotein metabolism in heterozygous familial hypercholesterolemia (HeFH), exhibits direct proatherogenic effects. PCSK9 circulates as mature and furin-cleaved forms, which differ in its biological activity. However, it remains to be elucidated whether each PCSK9 subtype has different atherogenic properties. OBJECTIVE: To investigate the association of each PCSK9 subtype with coronary atherosclerosis in HeFH...
March 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28500378/intravascular-ultrasound-elastography-analysis-of-the-elastic-mechanical-properties-of-atherosclerotic-plaque
#14
Zhaohuan Li, Lin Wang, Xiaobo Hu, Pengfei Zhang, Yifei Chen, Xinxin Liu, Mingjun Xu, Haijun Su, Mei Zhang
To assess the elastic mechanical properties of atherosclerotic plaque with different morphological properties by intravascular ultrasound elastography (IVUSE). 30 purebred New Zealand rabbits were fed a high-cholesterol diet; the abdominal aorta endothelium was balloon-injured after 2 weeks; at week 12, 2 plaques with moderate echo from each rabbit were chosen for in situ imaging, and 2 consecutive frames near the end-diastole images in situ were used to construct an IVUS elastogram. Shear strain (SS) and area strain (AS) were greater for eccentric than centripetal plaque (SS: 2...
May 13, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28496557/in-stent-restenosis-due-to-stent-recoil-after-third-generation-drug-eluting-stent-implantation
#15
Yuta Kato, Atsushi Iwata, Masayuki Nakamura, Shin-Ichiro Miura, Keijiro Saku
A 72-year-old man with a heavily calcified coronary lesion underwent percutaneous coronary intervention (PCI) using a third-generation drug-eluting stent (DES) with thin stent struts. Two months after the PCI, in-stent restenosis due to stent recoil (SR) occurred. An intravascular ultrasound (IVUS) revealed deformed stent struts and heavily calcified coronary plaque. The SR probably occurred due to persistent vessel compression as a result of heavily calcified coronary plaque. We should consider using a DES with thick stent struts rather than a third-generation DES with thin stent struts in patients with a heavily calcified coronary lesion...
June 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28493084/combined-intracoronary-2d-3d-optical-coherence-tomography-and-intravascular-ultrasound-imaging-in-left-main-severe-stent-malapposition
#16
Enrico Cerrato, Corina Biagioni, Pilar Jimenez-Quevedo, Ivan J Nuñez-Gil, Nieves Gonzalo, Javier Escaned
No abstract text is available yet for this article.
May 10, 2017: Cardiovascular Intervention and Therapeutics
https://www.readbyqxmd.com/read/28491180/transbiliary-intravascular-ultrasound-guided-diagnostic-biopsy-of-an-inaccessible-pancreatic-head-mass
#17
Jeffrey Forris Beecham Chick, Benjamin B Roush, Minhaj S Khaja, Dennis Prohaska, Kyle J Cooper, Wael E Saad, Ravi N Srinivasa
Percutaneous image-guided biopsies of pancreatic malignancies may prove challenging and nondiagnostic due to a variety of anatomic considerations. For patients with complex post-surgical anatomy, such as a Roux-en-Y gastric bypass, diagnosis via endoscopic ultrasound with fine-needle aspiration may not be possible because of an inability to reach the proximal duodenum. This report describes the first diagnostic case of transbiliary intravascular ultrasound-guided biopsy of a pancreatic head mass in a patient with prior Roux-en-Y gastric bypass for which a diagnosis could not be achieved via percutaneous and endoscopic approaches...
June 2017: Radiology case reports
https://www.readbyqxmd.com/read/28487358/intravascular-ultrasound-guided-percutaneous-coronary-intervention-for-left-main-disease-does-procedural-fine-tuning-make-a-relevant-clinical-benefit
#18
EDITORIAL
Duk-Woo Park, Seung-Jung Park
No abstract text is available yet for this article.
May 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28487356/intravascular-ultrasound-guidance-is-associated-with-better-outcome-in-patients-undergoing-unprotected-left-main-coronary-artery-stenting-compared-with-angiography-guidance-alone
#19
Pontus Andell, Sofia Karlsson, Moman A Mohammad, Matthias Götberg, Stefan James, Jens Jensen, Ole Fröbert, Oskar Angerås, Johan Nilsson, Elmir Omerovic, Bo Lagerqvist, Jonas Persson, Sasha Koul, David Erlinge
BACKGROUND: Small observational studies have indicated better outcome with intravascular ultrasound (IVUS) guidance when performing unprotected left main coronary artery (LMCA) percutaneous coronary intervention (PCI), but the overall picture remains inconclusive and warrants further investigation. We studied the impact of IVUS guidance on outcome in patients undergoing unprotected LMCA PCI in a Swedish nationwide observational study. METHODS AND RESULTS: Patients who underwent unprotected LMCA PCI between 2005 and 2014 because of stable coronary artery disease or acute coronary syndrome were included from the nationwide SCAAR (Swedish Coronary Angiography and Angioplasty Registry)...
May 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28479270/reconstruction-of-an-accidentally-crushed-stent-guided-by-intravascular-ultrasound-during-a-left-main-percutaneous-coronary-intervention
#20
Mohsen Mohandes, Mauricio Torres, Sergio Rojas, Francisco Fernández, Jordi Guarinos, Cristina Moreno
We present a case of an accidentally crushed stent due to an unnoticed passage of a guidewire through a lateral stent strut with subsequent stent compression after balloon dilatation, during a planned percutaneous coronary intervention on the left main. The crushed stent segment was reconstructed with step-by-step balloon dilation, guided by intravascular ultrasound.
May 4, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
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