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https://www.readbyqxmd.com/read/29034729/visualization-of-plaque-distribution-in-a-curved-artery-three-dimensional-intravascular-ultrasound-imaging
#1
Ahnryul Choi, David D McPherson, Hyunggun Kim
Intravascular ultrasound (IVUS) imaging provides an excellent tool for evaluation of the type, morphology, extent, and severity of an atheromatous plaque. 3 D IVUS imaging offers additive information pertaining to morphology of the arterial structures and volumetric plaque distributions. A new 3 D IVUS visualization technique was developed to provide 3 D structural information of a curved artery. A virtual 3 D curved arterial phantom consisting of varying cross-sectional shapes, wall thicknesses, and acoustic intensity information was utilized to validate the nonlinear interpolation technique to create intermediary 2 D IVUS images...
October 16, 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/29033314/analysis-of-threshold-stenosis-by-multiplanar-venogram-and%C3%A2-intravascular-ultrasound-examination-for-predicting-clinical-improvement-after-iliofemoral-vein-stenting-in-the%C3%A2-vidio-trial
#2
Paul J Gagne, Antonios Gasparis, Stephen Black, Patricia Thorpe, Marc Passman, Suresh Vedantham, William Marston, Mark Iafrati
BACKGROUND: Selecting patients for iliofemoral vein stenting has traditionally relied on the identification and quantification of stenotic lesions with imaging such as multiplanar venography. Recently, intravascular ultrasound (IVUS) imaging has become more available. However, to date, the usefulness of these imaging modalities using the customary >50% treatment threshold for diameter (multiplanar venography) and area (IVUS) stenosis of iliofemoral veins has not been validated prospectively within the context of clinical improvement...
October 12, 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/29032714/fusion-of-optical-coherence-tomography-and-angiography-for-numerical-simulation-of-hemodynamics-in-bioresorbable-stented-coronary-artery-based-on-patient-specific-model
#3
Chenxi Huang, Yuanhang Zhou, Xiaoxin Mao, Jianhua Tong, Lei Zhang, Fei Chen, Yongtao Hao
Three-dimensional simulations of coronary artery using finite element analysis are considered as effective means to understand the biomechanical properties after the stent was deployed. Bioresorbable vascular scaffolds are new-generation stents used by people. Intravascular optical coherence tomography is an emerging technique for detecting struts. The common 3 D reconstruction methods are using Intravascular Ultrasound (IVUS) or angiographies. However, it loses the details about geometry model. Fusing of optical coherence tomography and angiography to reconstruct the bioresorbable stented coronary artery based on patient-specific mode is an innovative method to reconstruct the high fidelity geometry...
October 16, 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/29025416/impact-of-renal-function-on-the-underlying-pathophysiology-of-coronary-plaque-composition-in-patients-with-type-2-diabetes-mellitus
#4
Kentaro Kakuta, Kaoru Dohi, Miho Miyoshi, Takashi Yamanaka, Masaki Kawamura, Jun Masuda, Tairo Kurita, Toru Ogura, Norikazu Yamada, Yasuhiro Sumida, Masaaki Ito
BACKGROUND: Both the progression of diabetic kidney disease and increased glycemic variability play important roles in the pathogenesis of coronary plaque formation via inflammatory pathways in patients with type 2 diabetes mellitus (T2DM). Therefore we evaluated the role of renal function in the contributory effects of blood glucose fluctuations and blood levels of inflammatory cytokine concentrations on the tissue characteristics of coronary plaques in patients with T2DM. METHODS: We prospectively enrolled 71 T2DM patients (mean age: 68 ± 9, male 79%) with 153 coronary artery lesions...
October 12, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29020367/clinical-outcomes-of-state-of-the-art-percutaneous-coronary-revascularization-in-patients-with-de-novo-three-vessel-disease-1-year-results-of-the-syntax-ii-study
#5
Javier Escaned, Carlos Collet, Nicola Ryan, Giovanni Luigi De Maria, Simon Walsh, Manel Sabate, Justin Davies, Maciej Lesiak, Raul Moreno, Ignacio Cruz-Gonzalez, Stephan P Hoole, Nick Ej West, J J Piek, Azfar Zaman, Farzin Fath-Ordoubadi, Rodney H Stables, Clare Appleby, Nicolas van Mieghem, Robert Jm van Geuns, Neal Uren, Javier Zueco, Pawel Buszman, Andres Iñiguez, Javier Goicolea, David Hildick-Smith, Andrzej Ochala, Dariusz Dudek, Colm Hanratty, Rafael Cavalcante, Arie Pieter Kappetein, David P Taggart, Gerrit-Anne van Es, Marie-Angèle Morel, Ton de Vries, Yoshinobu Onuma, Vasim Farooq, Patrick W Serruys, Adrian P Banning
Aims: To investigate if recent technical and procedural developments in percutaneous coronary intervention (PCI) significantly influence outcomes in appropriately selected patients with three-vessel (3VD) coronary artery disease. Methods and results: The SYNTAX II study is a multicenter, all-comers, open-label, single arm study that investigated the impact of a contemporary PCI strategy on clinical outcomes in patients with 3VD in 22 centres from four European countries...
August 26, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29018823/a-high-frequency-geometric-focusing-transducer-based-on-1-3-piezocomposite-for-intravascular-ultrasound-imaging
#6
Xiaohua Jian, Zhile Han, Pengbo Liu, Jie Xu, Zhangjian Li, Peiyang Li, Weiwei Shao, Yaoyao Cui
Due to the small aperture of blood vessel, a considerable disadvantage to current intravascular ultrasound (IVUS) imaging transducers is that their lateral imaging resolution is much lower than their axial resolution. To solve this problem, a single-element, 50 MHz, 0.6 mm diameter IVUS transducer with a geometric focus at 3 mm was proposed in this paper. The focusing transducer was based on a geometric-shaped 1-3 piezocomposite. The impedance/phase, pulse echo, acoustic intensity field, and imaging resolution of the focusing transducer were tested...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28988450/feasibility-of-coronary-angiography-and-percutaneous-coronary-intervention-after-transcatheter-aortic-valve-replacement-using-a-medtronic%C3%A2-self-expandable-bioprosthetic-valve
#7
Wah Wah Htun, Cindy Grines, Theodore Schreiber
BACKGROUND AND OBJECTIVE: With aging, the progression of atherosclerosis in the coronary arteries is expected. The Medtronic™ self-expandable aortic bioprosthetic valve is deployed in the supra-annular position, and it has been challenging to selectively engage coronary arteries post-transcatheter aortic valve replacement (TAVR) even though there are diamond-shaped spaces in the mesh frame within the valve. Given the scarcity of data, we analyzed angiographic and clinical data from all patients requiring coronary angiography (CA) or intervention post-TAVR...
October 8, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28980430/initial-results-of-a-first-in-human-study-on-the-plasmawire%C3%A2-system-a-new-radiofrequency-wire-for-recanalization-of-chronic-total-occlusions
#8
Daitaro Kanno, Etsuo Tsuchikane, Kenya Nasu, Osamu Katoh, Yoshifumi Kashima, Umihiko Kaneko, Tsutomu Fujita, Yoriyasu Suzuki, Takahiko Suzuki
OBJECTIVES: To examine the safety, efficacy, and efficiency of the PlasmaWire(TM) System to recanalize coronary chronic total occlusions (CTO) using controlled ablation inside the CTO. BACKGROUND: The PlasmaWire(TM) System is a new bipolar radiofrequency (RF) wire system utilizing plasma-mediated ablation to facilitate wire crossing in CTOs. Two independent PlasmaWire(TM) wires are used in tandem for channel creation by applying RF energy between the tips so as to localize the ablation...
October 5, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28968030/-perspectives-of-intravascular-ultrasound-during-the-myocardial-revascularization-of-elderly-and-senile-patients
#9
D A Vorobevskii
Intravascular Ultrasound (IVUS) of coronary arteries has lately been extensively used in the routine work of catheter laboratories. This method`s availability for qualifying the structure of atherosclerosis plague, degree of stricture formation in artery opening, length of the plaque while choosing the relevant size of stent and also for stent apposition control after implantation, makes IVUS an irreplaceable help in endovascular surgeons` work. Combination of coronary angiography and IVUS best represents the plaqued segments of artery total picture...
2017: Advances in Gerontology, Uspekhi Gerontologii
https://www.readbyqxmd.com/read/28966331/three-year-major-clinical-outcomes-of-angiography-guided-single-stenting-technique-in-non-complex-left-main-coronary-artery-diseases
#10
Yong Hoon Kim, Ae-Young Her, Seung-Woon Rha, Byoung Geol Choi, Minsuk Shim, Se Yeon Choi, Jae Kyeong Byun, Hu Li, Woohyeun Kim, Jun Hyuk Kang, Jah Yeon Choi, Eun Jin Park, Sung Hun Park, Sunki Lee, Jin Oh Na, Cheol Ung Choi, Hong Euy Lim, Eung Ju Kim, Chang Gyu Park, Hong Seog Seo, Dong Joo Oh
There is limited long-term comparative clinical outcome data concerning angiography- versus intravascular ultrasound (IVUS) -guided percutaneous coronary intervention (PCI) in non-complex left main coronary artery (LMCA) disease treated with the single stenting technique in the drug-eluting stent (DES) era.The aim of this study was to investigate whether angiography-guided stenting is comparable to IVUS-guided stenting during 3-year clinical follow-up periods in patients with non-complex LM disease treated with the single stenting technique...
September 30, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28952037/intravascular-ultrasound-assessment-of-the-effect-of-laser-energy-on-the-arterial-wall-during-the-treatment-of-femoro-popliteal-lesions-a-clirpath-excimer-laser-system-to-enlarge-lumen-openings-cello-registry-study
#11
Kayode O Kuku, Hector M Garcia-Garcia, Edward Koifman, Alexandre H Kajita, Sameer Desale, Viana Azizi, Gebremedhin Melaku, Anh Bui, Yael F Meirovich, Solomon Beyene, Aaphtaab Dheendsa, Blaine Schneider, Ron Waksman
The CliRpath Excimer Laser System to Enlarge Lumen Openings (CELLO) registry included patients treated with modified excimer laser catheters for the endovascular treatment of peripheral artery disease affecting the superficial femoral artery (SFA) and proximal popliteal artery. The aim of this study was to assess, via intravascular ultrasound (IVUS) the dissections in the vessel wall following treatment with the laser catheters. IVUS grayscale images from the CELLO registry were systematically reviewed for dissections in the treated vessel segments by two investigators...
September 26, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28943493/the-european-collaborative-project-on-inflammation-and-vascular-wall-remodeling-in-atherosclerosis-intravascular-ultrasound-atheroremo-ivus-study
#12
Sanneke P M de Boer, Yael Baran, Hector M Garcia-Garcia, Itamar Eskin, Mattie Lenzen, Marcus E Kleber, Evelyn Regar, Peter J de Jaegere, Jurgen M Ligthart, Robert Jan van Geuns, Tehro Lehtimäki, Reijo Laaksonen, Eric Boersma, Winfried März, Erin Halperin, Patrick W Serruys, Wolfgang Koenig
AIMS: The European Collaborative Project on Inflammation and Vascular Wall Remodelling in Atherosclerosis - Intravascular Ultrasound (ATHEROREMO-IVUS) study has been designed as an exploratory clinical study to investigate the associations between genetic variation, coronary atherosclerosis phenotypes, and plaque vulnerability as determined by IVUS. METHODS AND RESULTS: The ATHEROREMO-IVUS study is a prospective, observational study of 581 patients with stable angina pectoris or acute coronary syndrome (ACS) who were referred for coronary angiography to the Thoraxcenter, Rotterdam, enriched with 265 IBIS-2 participants (total population, n=846)...
September 26, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28941396/real-time-ultrasound-angiography-using-superharmonic-dual-frequency-2-25mhz-30mhz-cylindrical-array-in-vitro-study
#13
Zhuochen Wang, K Heath Martin, Paul A Dayton, Xiaoning Jiang
Recent studies suggest that dual-frequency intravascular ultrasound (IVUS) transducers allow detection of superharmonic bubble signatures, enabling acoustic angiography for microvascular and molecular imaging. In this paper, a dual-frequency IVUS cylindrical array transducer was developed for real-time superharmonic imaging. A reduced form-factor lateral mode transmitter (2.25MHz) was used to excite microbubbles effectively at 782kPa with single-cycle excitation while still maintaining the small size and low profile (5Fr) (3Fr=1mm) for intravascular imaging applications...
September 15, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28938968/the-lipid-rich-plaque-study-of-vulnerable-plaques-and-vulnerable-patients-study-design-and-rationale
#14
REVIEW
Ron Waksman, Rebecca Torguson, Mia-Ashley Spad, Hector Garcia-Garcia, James Ware, Rui Wang, Sean Madden, Priti Shah, James Muller
BACKGROUND: It has been hypothesized that the outcome post-PCI could be improved by the detection and subsequent treatment of vulnerable patients and lipid-rich vulnerable coronary plaques (LRP). A near-infrared spectroscopy (NIRS) catheter capable of detecting LRP is being evaluated in The Lipid-Rich Plaque Study. STUDY DESIGN: The LRP Study is an international, multicenter, prospective cohort study conducted in patients with suspected coronary artery disease (CAD) who underwent cardiac catheterization with possible ad hoc PCI for an index event...
October 2017: American Heart Journal
https://www.readbyqxmd.com/read/28938644/intravascular-ultrasound-guidance-in-drug-eluting-stents-implantation-a-meta-analysis-and-trial-sequential-analysis-of-randomized-controlled-trials
#15
Cheng Qian, Hong Feng, Jianlei Cao, Guangyu Zhang, Yanggan Wang
OBJECTIVE: Previous evidence suggested that intravascular ultrasound (IVUS) guidance could improve outcomes after drug-eluting stents (DES) placement, largely driven by data from observational studies. We, therefore, performed a meta-analysis and trial sequential analysis of randomized controlled trials to overcome this limitation. RESULTS: The retrieval process yielded 7 RCTs with 3,192 patients. Compared to the angiography guidance, IVUS-guided DES implantation was associated with a significant reduction in the major adverse cardiac events (MACE) (OR 0...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28929334/efficacy-of-biolimus-a9-eluting-stent-for-treatment-of-right-coronary-ostial-lesion-with-intravascular-ultrasound-guidance-a-multi-center-registry
#16
Kenya Nasu, Yuji Oikawa, Maoto Habara, Shinichi Shirai, Hidetoshi Abe, Makoto Kadotani, Ryo Gotoh, Hidenari Hozawa, Hiroshi Ota, Takashi Suzuki, Yoshihisa Shibata, Masaki Tanabe, Yuya Nakagawa, Takeshi Serikawa, Shiro Nagasaka, Yasuyo Takeuchi, Yoshihide Fujimoto, Hiroshi Tamura, Yuichi Kobori, Junji Yajima, Tadanori Aizawa, Takahiko Suzuki
The aim of this study was to assess the efficacy of a biolimus A9-eluting stent in patients with a right coronary artery (RCA) ostial lesion. Ostial lesions of the RCA have been a limitation of percutaneous coronary intervention even in the drug-eluting stent (DES) era. However, clinical outcomes after the deployment of a second generation DES to an RCA ostial lesion with intravascular ultrasound (IVUS) guidance have not been fully elucidated. From September 2011 to March 2013, 74 patients were enrolled in 17 centers from Japan...
September 19, 2017: Cardiovascular Intervention and Therapeutics
https://www.readbyqxmd.com/read/28923692/polymer-free-biolimus-a9-coated-stents-in-the-treatment-of-de-novo-coronary-lesions-with-short-dapt-9-month-angiographic-and-clinical-follow-up-of-the-prospective-multicenter-biofreedom-usa-clinical-trial
#17
Ron Waksman, Guy N Piegari, Ameer Kabour, Louis Cannon, John Wang, George Adams, Naresh Solankhi, Anthony Smeglin, Dean J Kereiakes, Roy Leiboff, Mia-Ashley Spad, Rebecca Torguson, Nina Chandra, Roshni Bastian, Jolanda DeGroot, Margaret W Kayo, Hans-Peter Stoll, Hector M Garcia-Garcia
BACKGROUND: BioFreedom is a polymer- and carrier-free drug-coated stent that delivers Biolimus A9 to the vessel wall. Our purpose was to evaluate the efficacy and safety of this DCS in patients with short-duration dual antiplatelet therapy. METHODS: The BioFreedom US IDE feasibility trial was a single-arm, open-label, prospective study of patients requiring stenting of de novo lesions. Patients received 3 months of DAPT, repeat angiography at 9 months, and clinical follow-up at multiple intervals...
July 31, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28923645/comparison-of-segmental-versus-longitudinal-intravascular-ultrasound-analysis-for-pediatric-cardiac-allograft-vasculopathy
#18
M A Kuhn, M Burch, R E Chinnock, M J Fenton
Intravascular ultrasound (IVUS) has been routinely used in some centers to investigate cardiac allograft vasculopathy in pediatric heart transplant recipients. We present an alternative method using more sophisticated imaging software. This study presents a comparison of this method with an established standard method. All patients who had IVUS performed in 2014 were retrospectively evaluated. The standard technique consisted of analysis of 10 operator-selected segments along the vessel. Each study was re-evaluated using a longitudinal technique, taken at every third cardiac cycle, along the entire vessel...
October 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28918858/coronary-ct-angiography-features-of-ruptured-and-high-risk-atherosclerotic-plaques-correlation-with-intra-vascular-ultrasound
#19
Daniel R Obaid, Patrick A Calvert, Adam Brown, Deepa Gopalan, Nick E J West, James H F Rudd, Martin R Bennett
BACKGROUND: Features of ruptured and high-risk plaque have been described on coronary computed tomography angiography (coronary CTA), but not systematically assessed against intravascular ultrasound (IVUS). We examined the ability of coronary CTA to identify IVUS defined ruptured plaque and Virtual Histology Intravascular Ultrasound (VH-IVUS) defined thin-cap fibroatheroma (TCFA). METHODS: Sixty-three patients (32 with acute coronary syndrome and 31 with stable angina) underwent coronary CTA, IVUS and VH-IVUS...
September 5, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28917678/optical-frequency-domain-imaging-versus-intravascular-ultrasound-in-percutaneous-coronary-intervention-opinion-trial-results-from-the-opinion-imaging-study
#20
Hiromasa Otake, Takashi Kubo, Hachidai Takahashi, Toshiro Shinke, Takayuki Okamura, Kiyoshi Hibi, Gaku Nakazawa, Yoshihiro Morino, Junya Shite, Tetsuya Fusazaki, Ken Kozuma, Tetsuya Ioji, Hideaki Kaneda, Takashi Akasaka
OBJECTIVES: We sought to clarify how intravascular ultrasound (IVUS) and optical coherence tomography affect percutaneous coronary intervention (PCI) with current-generation drug-eluting stents in a pre-specified substudy of the OPINION (OPtical frequency domain imaging versus INtravascular ultrasound in percutaneous coronary interventiON) trial, a multicenter, prospective, randomized, noninferiority trial comparing optical frequency domain imaging (OFDI)-guided PCI with IVUS-guided PCI...
September 9, 2017: JACC. Cardiovascular Imaging
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