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Intracoronary imaging

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https://www.readbyqxmd.com/read/29761981/-plaque-segmentation-of-intracoronary-optical-coherence-tomography-images-based-on-k-means-and-improved-random-walk-algorithm
#1
Guanglei Wang, Pengyu Wang, Yechen Han, Xiuling Liu, Yan Li, Qian Lu
In recent years, optical coherence tomography (OCT) has developed into a popular coronary imaging technology at home and abroad. The segmentation of plaque regions in coronary OCT images has great significance for vulnerable plaque recognition and research. In this paper, a new algorithm based on K -means clustering and improved random walk is proposed and Semi-automated segmentation of calcified plaque, fibrotic plaque and lipid pool was achieved. And the weight function of random walk is improved. The distance between the edges of pixels in the image and the seed points is added to the definition of the weight function...
June 1, 2017: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29748151/patient-specific-3d-printing-simulation-to-guide-complex-coronary-intervention
#2
Manuel Oliveira-Santos, Eduardo Oliveira Santos, Ana Vera Marinho, Luís Leite, Jorge Guardado, Vítor Matos, Guilherme Mariano Pego, João Silva Marques
The field of three-dimensional printing applied to patient-specific simulation is evolving as a tool to enhance intervention results. We report the first case of a fully simulated percutaneous coronary intervention in a three-dimensional patient-specific model to guide treatment. An 85-year-old female presented with symptomatic in-stent restenosis in the ostial circumflex and was scheduled for percutaneous coronary intervention. Considering the complexity of the anatomy, patient setting and intervention technique, we elected to replicate the coronary anatomy using a three-dimensional model...
May 7, 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29743901/effect-of-nicorandil-administration-on-myocardial-microcirculation-during-primary-percutaneous-coronary-intervention-in-patients-with-acute-myocardial-infarction
#3
Chunguang Feng, Bing Han, Yi Liu, Lulu Wang, Dongdong Niu, Ming Lou, Cunzhi Lu
Introduction: Prevention of the no-reflow phenomenon has a crucial role in primary percutaneous coronary intervention (P-PCI) procedures. Aim: To assess the effects of early intracoronary administration of nicorandil (NIC) during P-PCI on myocardial microcirculation in patients with acute myocardial infarction (AMI). Material and methods: A total of 120 patients with first acute anterior wall ST segment elevation myocardial infarction who underwent P-PCI were randomly divided into two groups: the NIC group (A, n = 60) and the placebo group (B, n = 60)...
2018: Postępy W Kardiologii Interwencyjnej, Advances in Interventional Cardiology
https://www.readbyqxmd.com/read/29732926/imaging-guided-pre-dilatation-stenting-post-dilatation-ipsp-a-protocolized-approach-highlighting-the-importance-of-intravascular-imaging-for-implantation-of-bioresorbable-scaffolds
#4
Ziad A Ali, Keyvan Karimi Galougahi, Richard Shlofmitz, Akiko Maehara, Gary S Mintz, Alexandre Abizaid, Daniel Chamié, Jonathan Hill, Patrick W Serruys, Yoshinobu Onuma, Gregg W Stone
The advent of the fully bioresorbable vascular scaffold (BVS) is the latest step in a series of advancements in the design of intracoronary stents over the past few decades. The novelty of this technology is in providing temporary vessel scaffolding and local antiproliferative therapy to prevent neointimal hyperplasia after percutaneous coronary intervention followed by gradual resorption of the scaffold to restore the native vessel anatomy and physiology-a process termed vascular reparative therapy. Areas covered: The first generation of BVS has not been able to fully match the high benchmark in safety and efficacy set by contemporary metallic drug-eluting stents...
May 7, 2018: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/29695254/atherosclerosis-t1-weighted-characterization-catch-evaluation-of-the-accuracy-for-identifying-intraplaque-hemorrhage-with-histological-validation-in-carotid-and-coronary-artery-specimens
#5
Wen Liu, Yibin Xie, Chuan Wang, Yanni Du, Christopher Nguyen, Zhenjia Wang, Zhaoyang Fan, Li Dong, Yi Liu, Xiaoming Bi, Jing An, Chengxiong Gu, Wei Yu, Debiao Li
BACKGROUND: Coronary high intensity plaques (CHIPs) detected using cardiovascular magnetic resonance (CMR) coronary atherosclerosis T1-weighted characterization with integrated anatomical reference (CATCH) have been shown to be positively associated with high-risk morphology observed on intracoronary optical coherence tomography (OCT). This study sought to validate whether CHIPs detected on CATCH indicate the presence of intraplaque hemorrhage (IPH) through ex vivo imaging of carotid and coronary plaque specimens, with histopathology as the standard reference...
April 26, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29691183/intravascular-imaging-for-cardiac-arrest-with-normal-coronary-arteriography
#6
Tawfiq Choudhury, Amir Solomonica, Rodrigo Bagur, Shahar Lavi
Spontaneous coronary artery dissection (SCAD) is an under-recognised presentation of acute coronary syndrome. A high index of suspicion is essential. If diagnostic doubt is high, intracoronary imaging, performed carefully, can be useful, although it can result in worsening of the clinical condition. The current report exemplifies the complexity of diagnosis and management of SCAD in a patient with out-of-hospital cardiac arrest and non-diagnostic angiography.
April 14, 2018: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29670878/matrix-metalloproteinase-2-impairs-homing-of-intracoronary-delivered-mesenchymal-stem-cells-in-a-porcine-reperfused-myocardial-infarction-comparison-with-intramyocardial-cell-delivery
#7
Katrin Zlabinger, Dominika Lukovic, Rayyan Hemetsberger, Alfred Gugerell, Johannes Winkler, Ljubica Mandic, Denise Traxler, Andreas Spannbauer, Susanne Wolbank, Gerald Zanoni, Christoph Kaun, Aniko Posa, Andrea Gyenes, Zsolt Petrasi, Örs Petnehazy, Imre Repa, Renate Hofer-Warbinek, Rainer de Martin, Florian Gruber, Silvia Charwat, Kurt Huber, Noemi Pavo, Imre J Pavo, Noemi Nyolczas, Dara L Kraitchman, Mariann Gyöngyösi
Background: Intracoronary (IC) injection of mesenchymal stem cells (MSCs) results in a prompt decrease of absolute myocardial blood flow (AMF) with late and incomplete recovery of myocardial tissue perfusion. Here, we investigated the effect of decreased AMF on oxidative stress marker matrix metalloproteinase-2 (MMP-2) and its influence on the fate and homing and paracrine character of MSCs after IC or intramyocardial cell delivery in a closed-chest reperfused myocardial infarction (MI) model in pigs...
2018: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/29588734/expert-opinion-optimising-stent-deployment-in-contemporary-practice-the-role-of-intracoronary-imaging-and-non-compliant-balloons
#8
Ashok Seth, Sajal Gupta, Vivudh Pratap Singh, Vijay Kumar
Final stent dimensions remain an important predictor of restenosis, target vessel revascularisation (TVR) and subacute stent thrombosis (ST), even in the drug-eluting stent (DES) era. Stent balloons are usually semi-compliant and thus even high-pressure inflation may not achieve uniform or optimal stent expansion. Post-dilatation with non-compliant (NC) balloons after stent deployment has been shown to enhance stent expansion and could reduce TVR and ST. Based on supporting evidence and in the absence of large prospective randomised outcome-based trials, post-dilatation with an NC balloon to achieve optimal stent expansion and maximal luminal area is a logical technical recommendation, particularly in complex lesion subsets...
September 2017: Interventional Cardiology
https://www.readbyqxmd.com/read/29577420/infarction-of-the-septomarginal-band-and-tricuspid-papillary-muscle-rupture-related-to-alcohol-septal-ablation-for-hypertrophic-cardiomyopathy
#9
Munevver Sari, Cemil Izgi, Gokhan Kahveci, Alev Kilicgedik, Zubeyde Bayram, Suzan Hatipoglu, Selcuk Pala, Nihal Ozdemir
We presented a 77-year-old man with hypertrophic obstructive cardiomyopathy applied with flail tricuspid leaflet and severe tricuspid regurgitation leading to right heart failure 2 months after the failed septal ablation. The ruptured anterior tricuspid papillary muscle resulted from infarction of the base of anterior papillary muscle of the right ventricle (RV) confirmed by magnetic resonance imaging. As the septomarginal band is frequently lit up by intracoronary contrast that particular attention should be paid to the RV papillary muscles...
March 25, 2018: Echocardiography
https://www.readbyqxmd.com/read/29569254/stem-cell-therapy-in-st-segment-elevation-myocardial-infarction-with-reduced-ejection-fraction-a-multicenter-double-blind-randomized-trial
#10
José C Nicolau, Remo H M Furtado, Suzana A Silva, Carlos E Rochitte, Anis Rassi, João B M C Moraes, Edgard Quintella, Costantino R Costantini, Adrian P M Korman, Marco A Mattos, Hélio J Castello, Adriano Caixeta, Hans F R Dohmann, Antonio C C de Carvalho
BACKGROUND: Left ventricular ejection fraction (LVEF) is a major determinant of long-term prognosis after ST-segment elevation myocardial infarction (STEMI). STEMI patients with reduced LVEF have a poor prognosis, despite successful reperfusion and the use of renin-angiotensin-aldosterone inhibitors. HYPOTHESIS: Intracoronary infusion of bone marrow-derived mononuclear cells (BMMC) may improve LVEF in STEMI patients successfully reperfused. METHODS: The main inclusion criteria for this double-blind, randomized, multicenter study were patient age 30 to 80 years, LVEF ≤50%, successful angioplasty of infarct-related artery, and regional dysfunction in the infarct-related area analyzed before cell injection...
March 22, 2018: Clinical Cardiology
https://www.readbyqxmd.com/read/29560624/polymeric-endovascular-strut-and-lumen-detection-algorithm-for-intracoronary-optical-coherence-tomography-images
#11
Junedh M Amrute, Lambros S Athanasiou, Farhad Rikhtegar, José M de la Torre Hernández, Tamara García Camarero, Elazer R Edelman
Polymeric endovascular implants are the next step in minimally invasive vascular interventions. As an alternative to traditional metallic drug-eluting stents, these often-erodible scaffolds present opportunities and challenges for patients and clinicians. Theoretically, as they resorb and are absorbed over time, they obviate the long-term complications of permanent implants, but in the short-term visualization and therefore positioning is problematic. Polymeric scaffolds can only be fully imaged using optical coherence tomography (OCT) imaging-they are relatively invisible via angiography-and segmentation of polymeric struts in OCT images is performed manually, a laborious and intractable procedure for large datasets...
March 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29552237/coronary-arterial-spasm-detected-by-coronary-computed-tomography-angiography-and-confirmed-by-intravascular-ultrasound
#12
Masafumi Nakayama, Masaharu Hirano, Sonoka Goto, Akifumi Watanabe, Takashi Uchiyama
A 40-year-old man was admitted to our hospital for chest pain after smoking. Coronary computed tomography angiography showed severe stenosis in the left anterior descending artery. The stenosis site had no plaque on stretched curved multiplanar reconstruction and short-axis images. Coronary angiography revealed improvement of the severe stenosis after the intracoronary administration of isosorbide dinitrate in the left anterior descending artery. Intravascular ultrasound demonstrated negative remodeling without a plaque and diffuse intima with media thickening at the stenosis site...
February 2018: Radiology Case Reports
https://www.readbyqxmd.com/read/29549452/spontaneous-coronary-artery-dissection-diagnosis-and-management
#13
REVIEW
Ilhwan Yeo, Dmitriy N Feldman, Luke K Kim
PURPOSE OF REVIEW: Spontaneous coronary artery dissection (SCAD) is a non-iatrogenic and non-traumatic separation of the coronary arterial wall. While SCAD represents an important cause of myocardial infarction, optimal diagnostic and therapeutic options remain challenging. We sought to review recent studies and provide an update on diagnosis and management of SCAD. RECENT FINDINGS: Coronary angiography is the first-line diagnostic modality for SCAD, with three angiographic features commonly observed in SCAD: type 1 (pathognomonic angiographic appearance with contrast staining of the arterial wall), type 2 (long coronary stenosis), and type 3 (focal tubular stenosis)...
March 17, 2018: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29540631/current-use-of-intracoronary-imaging-in-interventional-practice-results-of-a-european-association-of-percutaneous-cardiovascular-interventions-eapci-and-japanese-association-of-cardiovascular-interventions-and-therapeutics-cvit-clinical-practice-survey
#14
Konstantinos C Koskinas, Masato Nakamura, Lorenz Räber, Roisin Colleran, Kazushige Kadota, Davide Capodanno, William Wijns, Takashi Akasaka, Marco Valgimigli, Giulio Guagliumi, Stephan Windecker, Robert A Byrne
BACKGROUND: This study evaluated the views of the cardiology community on the clinical use of coronary intravascular imaging (IVI).Methods and Results:A web-based survey was distributed to 31,893 individuals, with 1,105 responses received (3.5% response rate); 1,010 of 1,097 respondents (92.1%) self-reported as interventional cardiologists, 754 (68.7%) with >10 years experience. Overall, 96.1% had personal experience with IVI (95.5% with intravascular ultrasound [IVUS], 69.8% with optical coherence tomography [OCT], and 7...
March 15, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29537966/current-use-of-intracoronary-imaging-in-interventional-practice-results-of-a-european-association-of-percutaneous-cardiovascular-interventions-eapci-and-japanese-association-of-cardiovascular-interventions-and-therapeutics-cvit-clinical-practice-survey
#15
Konstantinos C Koskinas, Masato Nakamura, Lorenz Räber, Roisin Colleran, Kazushige Kadota, Davide Capodanno, William Wijns, Takashi Akasaka, Marco Valgimigli, Giulio Guagliumi, Stephan Windecker, Robert A Byrne
AIMS: This study evaluated the views of the cardiology community on the clinical use of coronary intravascular imaging (IVI). METHODS AND RESULTS: A web-based survey was distributed to 31,893 individuals, with 1,105 responses received (3.5% response rate); 1,010 of 1,097 respondents (92.1%) self-reported as interventional cardiologists, 754 (68.7%) with >10 years experience. Overall, 96.1% had personal experience with IVI (95.5% with intravascular ultrasound [IVUS], 69...
March 15, 2018: EuroIntervention
https://www.readbyqxmd.com/read/29519392/coronary-artery-kinking-as-a-rare-cause-of-ischemia-in-a-young-woman-harmonious-approach-using-intracoronary-imaging-and-physiology
#16
So-Yeon Choi, In-Ho Chae, Gary S Mintz, Seung-Jea Tahk
No abstract text is available yet for this article.
March 12, 2018: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29514171/optical-coherence-tomography-verified-morphological-correlates-of-high-intensity-coronary-plaques-on-non-contrast-t1-weighted-magnetic-resonance-imaging-in-patients-with-stable-coronary-artery-disease
#17
Tomoaki Kanaya, Teruo Noguchi, Fumiyuki Otsuka, Yasuhide Asaumi, Yu Kataoka, Yoshiaki Morita, Hiroyuki Miura, Kazuhiro Nakao, Masashi Fujino, Tomohiro Kawasaki, Kunihiro Nishimura, Teruo Inoue, Jagat Narula, Satoshi Yasuda
Aims: Coronary high-intensity plaques (HIPs) with a high plaque-to-myocardial signal intensity ratio (PMR) on non-contrast T1-weighted imaging in patients with stable coronary artery disease (CAD) are associated with future coronary events. To characterize the morphological substrate of HIP, we performed a correlative optical coherence tomography (OCT) study. Methods and results: We examined 137 lesions in 105 patients with stable angina pectoris or silent myocardial ischaemia scheduled for percutaneous coronary intervention (PCI) using a 3 T magnetic resonance scanner...
March 5, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29496901/evaluation-of-human-coronary-vasodilator-function-predicts-future-coronary-atheroma-progression
#18
Samuel L Sidharta, Timothy J Baillie, Stuart Howell, Stephen J Nicholls, Natalie Montarello, Satoshi Honda, Daisuke Shishikura, Sinny Delacroix, Susan Kim, John F Beltrame, Peter J Psaltis, Stephen G Worthley, Matthew I Worthley
OBJECTIVE: Coronary vasodilator function and atherosclerotic plaque progression have both been shown to be associated with adverse cardiovascular events. However, the relationship between these factors and the lipid burden of coronary plaque remains unknown. These experiments focus on investigating the relationship between impaired coronary vasodilator function (endothelium dependent (salbutamol) and endothelium independent (glyceryl trinitrate)) and the natural history of atheroma plaque progression and lipid burden using dual modality intravascular ultrasound (IVUS) and near-infrared spectroscopy (NIRS) imaging...
March 1, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29465434/the-five-year-clinical-and-angiographic-follow-up-outcomes-of-intracoronary-transfusion-of-circulation-derived-cd34-cells-for-patients-with-end-stage-diffuse-coronary-artery-disease-unsuitable-for-coronary-intervention-phase-i-clinical-trial
#19
Pei-Hsun Sung, Fan-Yen Lee, Meng-Shen Tong, John Y Chiang, Sung-Nan Pei, Ming-Chun Ma, Yi-Chen Li, Yung-Lung Chen, Chiung-Jen Wu, Jiunn-Jye Sheu, Mel S Lee, Hon-Kan Yip
OBJECTIVES: This study investigated the clinical and angiographic long-term outcomes of intracoronary transfusion of circulation-derived CD34+ cells for patients with end-stage diffuse coronary artery disease unsuitable for coronary intervention. DESIGN AND SETTING: A single-center prospective randomized double-blinded phase I clinical trial. Thirty-eight patients undergoing CD34+ cell therapy were allocated into groups 1 (1.0 × 10 cells/each vessel; n = 18) and 2 (3...
May 2018: Critical Care Medicine
https://www.readbyqxmd.com/read/29452688/comparison-of-the-efficacy-and-safety-of-orbital-and-rotational-atherectomy-in-calcified-narrowings-in-patients-who-underwent-percutaneous-coronary-intervention
#20
Edward Koifman, Hector M Garcia-Garcia, Kayode O Kuku, Alexandre H Kajita, Kyle D Buchanan, Arie Steinvil, Toby Rogers, Nelson L Bernardo, Robert Lager, Robert A Gallino, Itsik Ben-Dor, Augusto D Pichard, Rebecca Torguson, Jiaxiang Gai, Lowell F Satler, Ron Waksman
We aimed to compare the safety and efficacy of rotational atherectomy (RA) and orbital atherectomy (OA) during percutaneous coronary intervention in an all-comer population with severely calcified lesions. We included all patients who underwent percutaneous coronary intervention with OA or RA in our institution from October 2013 until October 2016. Comparison of baseline and procedural characteristics, along with acute complication rates and postprocedural cardiac enzyme elevation, was performed. There were 191 RA and 57 OA patients...
April 15, 2018: American Journal of Cardiology
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