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Intravascular ultrasound

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https://www.readbyqxmd.com/read/28819899/significance-of-intravascular-ultrasound-and-exercise-stress-echocardiography-in-diagnosis-of-exercise-induced-vasospastic-angina-at-the-site-of-moderate-stenosis
#1
Makio Muraishi, Kentaro Shibayama, Masahiko Noguchi, Hiroyuki Watanabe, Kotaro Obunai
Recently, exercise-induced spastic coronary artery occlusion at the site of moderate stenosis, which Prinzmetal's angina or cardiac syndrome X does not cover, was reported. Multi-modality imaging is important for the diagnosis of coronary artery disease with a complex ischemic mechanism. However, the previous report did not include findings from intracoronary imaging at the site of moderate coronary stenosis. We report a case of exercise-induced vasospastic angina at the site of moderate stenosis, where multi-modality imaging, including exercise stress echocardiography and intravascular ultrasound, was utilized to make a definitive diagnosis and investigate underlying causes...
August 17, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28819458/focused-ultrasound-hyperthermia-mediated-drug-delivery-using-thermosensitive-liposomes-and-visualized-with-in-vivo-two-photon-microscopy
#2
Marc A Santos, David E Goertz, Kullervo Hynynen
The future of nanomedicines in oncology requires leveraging more than just the passive drug accumulation in tumors through the enhanced permeability and retention effect. Promising results combining mild hyperthermia (HT) with lyso-thermosensitive liposomal doxorubicin (LTSL-DOX) has led to improved drug delivery and potent antitumor effects in pre-clinical studies. The ultimate patient benefit from these treatments can only be realized when robust methods of HT can be achieved clinically. One of the most promising methods of non-invasive HT is the use of focused ultrasound (FUS) with MRI thermometry for anatomical targeting and feedback...
2017: Theranostics
https://www.readbyqxmd.com/read/28818353/does-calcium-burden-impact-culprit-lesion-morphology-and-clinical-results-an-adapt-des-ivus-substudy
#3
Peiren Shan, Gary S Mintz, Bernhard Witzenbichler, D Christopher Metzger, Michael J Rinaldi, Peter L Duffy, Giora Weisz, Thomas D Stuckey, Bruce R Brodie, Philippe Généreux, Aaron Crowley, Ajay J Kirtane, Gregg W Stone, Akiko Maehara
BACKGROUND: Increasing coronary lesion calcification is thought to be associated with adverse percutaneous coronary intervention (PCI) and clinical outcomes. We investigated the effects of calcium burden on culprit lesion morphology and clinical events after intravascular ultrasound (IVUS)-guided PCI in the ADAPT-DES study. METHODS: ADAPT-DES was a prospective, multicenter registry of 8582 consecutive patients undergoing successful PCI using DES. A pre-specified virtual histology (VH)-IVUS substudy of 638 culprit lesions (638 patients) had both pre- and post-PCI VH-IVUS...
August 12, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28818221/venography-versus-intravascular-ultrasound-for-diagnosing-and-treating-iliofemoral-vein-obstruction
#4
Paul J Gagne, Robert W Tahara, Carl P Fastabend, Lukasz Dzieciuchowicz, William Marston, Suresh Vedantham, Windsor Ting, Mark D Iafrati
OBJECTIVE: The Venogram vs IVUS for Diagnosing Iliac vein Obstruction (VIDIO) trial was designed to compare the diagnostic efficacy of intravascular ultrasound (IVUS) with multiplanar venography for iliofemoral vein obstruction. METHODS: During a 14-month period beginning July 2014, 100 patients with chronic Clinical, Etiologic, Anatomic, and Pathophysiologic clinical class C4 to C6 venous disease and suspected iliofemoral vein obstruction were enrolled at 11 U...
September 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28818219/contemporary-outcomes-after-venography-guided-treatment-of-patients-with-may-thurner-syndrome
#5
Johnathon C Rollo, Steven M Farley, Adam Z Oskowitz, Karen Woo, Brian G DeRubertis
OBJECTIVE: Patients with May-Thurner syndrome (MTS) present with a spectrum of findings ranging from mild left leg edema to extensive iliofemoral deep venous thrombosis (DVT). Whereas asymptomatic left common iliac vein (LCIV) compression can be seen in a high proportion of normal individuals on axial imaging, the percentage of these persons with symptomatic compression is small, and debate exists about the optimal clinical and diagnostic criteria to treat these lesions in patients with symptomatic venous disease...
September 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28814587/a-case-of-cardiopulmonary-arrest-due-to-spontaneous-coronary-artery-dissection-in-a-pregnant-woman
#6
Emiko Ejima, Yoshinobu Murasato
We present the case of a young pregnant woman with cardiopulmonary arrest due to acute coronary syndrome. Emergent coronary angiography (CAG) and intravascular ultrasound (IVUS) showed extensive coronary artery dissection in the left anterior descending artery, which was treated with primary percutaneous coronary intervention. After managing the heart failure and disseminated intravascular coagulation, a dead fetus was delivered via caesarean section 4 days after admission to the hospital. Follow-up CAG and IVUS at 18 months showed persistent dissection in the non-stented site; hence, another stent was implanted...
August 16, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28812000/diagnostic-imaging-features-of-necrotizing-enterocolitis-a-narrative-review
#7
REVIEW
Francesco Esposito, Rosanna Mamone, Marco Di Serafino, Carmela Mercogliano, Valerio Vitale, Gianfranco Vallone, Patrizia Oresta
Necrotizing enterocolitis (NEC) is an inflammatory process, characterized by intestinal necrosis of variable extension, leading to perforation, generalized peritonitis and death. The classical pathogenetic theory focuses on mucosal damage related to a stress induced intestinal ischemia leading to mucosal injury and bacterial colonization of the wall. A more recent hypothesis emphasizes the role of immaturity of gastrointestinal and immune system, particularly of the premature, responsible of bowel wall vulnerability and suffering...
June 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28799447/a-higher-volume-of-fibrotic-tissue-on-virtual-histology-prior-to-coronary-stent-implantation-predisposes-to-more-pronounced-neointima-proliferation
#8
Steven Haine, Kristien Wouters, Hielko Miljoen, Tom Vandendriessche, Marc Claeys, Johan Bosmans, Christiaan Vrints
BACKGROUND: Since neointima smooth muscle cells (SMC) mainly originate from the vessel wall, we investigated whether atherosclerotic plaque composition influences subsequent in-stent neointima proliferation and restenosis. METHODS: We performed intravascular ultrasound (IVUS) with virtual histology in 98 patients prior to elective bare-metal stent (BMS) implantation in de novo coronary artery lesions. Virtual histology variables pre-percutaneous coronary intervention (PCI) were related to in-stent neointima proliferation six months after implantation assessed as late luminal loss of 0...
August 11, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28798779/one-swallow-does-not-a-summer-make-but-many-swallows-do-accumulating-clinical-evidence-for-nearly-eliminated-peri-procedural-and-30-day-complications-with-mesh-covered-stents-transforms-the-carotid-revascularisation-field
#9
REVIEW
Piotr Musiałek, L Nelson Hopkins, Adnan H Siddiqui
Atherosclerotic carotid artery stenosis (CS) continues to be a common cause of acute ischaemic stroke. Optimised medical therapy (OMT), the first-line treatment modality in CS, may reduce or delay - but it does not abolish - CS-related strokes. As per current AHA/ASA and ESC/ESVS/ESO guidelines, carotid artery stenting (CAS) is a less-invasive alternative to carotid endarterectomy (CEA) for CS revascularisation in primary and secondary stroke prevention. Ten-year follow-up from the CREST trial in patients with symptomatic and asymptomatic CS confirmed equipoise of CAS and CEA in the primary endpoint...
2017: Postępy W Kardiologii Interwencyjnej, Advances in Interventional Cardiology
https://www.readbyqxmd.com/read/28797408/in-vivo-calcium-detection-by-comparing-optical-coherence-tomography-intravascular-ultrasound-and-angiography
#10
Xiao Wang, Mitsuaki Matsumura, Gary S Mintz, Tetsumin Lee, Wenbin Zhang, Yang Cao, Akiko Fujino, Yongqing Lin, Eisuke Usui, Yoshihisa Kanaji, Tadashi Murai, Taishi Yonetsu, Tsunekazu Kakuta, Akiko Maehara
OBJECTIVES: The aim of this study was to evaluate optical coherence tomography (OCT) and intravascular ultrasound (IVUS) versus coronary angiography in the assessment of target lesion calcification and its effect on stent expansion. BACKGROUND: IVUS is more sensitive than angiography in the detection of coronary artery calcium, but the relationship among IVUS, OCT, and angiography has not been studied. METHODS: Overall, 440 lesions (440 patients with stable angina) underwent OCT- and IVUS-guided stent implantation...
August 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28794001/randomized-comparison-of-ridaforolimus-eluting-and-zotarolimus-eluting-coronary-stents-in-patients-with-coronary-artery-disease-primary-results-from-the-bionics-trial
#11
David E Kandzari, Pieter C Smits, Michael P Love, Ori Ben-Yehuda, Shmuel Banai, Simon D Robinson, Michael Jonas, Ran Kornowski, Rodrigo Bagur, Andres Iniguez, Haim D Danenberg, Robert L Feldman, Rajiv Jauhar, Harish Chandna, Manish A Parikh, Gidon Y Perlman, Mercedes Balcells, Peter M Markham, Melek Ozgu Ozan, Philippe Genereux, Elazer Edelman, Martin B Leon, Gregg W Stone
Background -The safety and efficacy of a novel cobalt alloy-based coronary stent with a durable elastomeric polymer eluting the antiproliferative agent ridaforolimus for treatment of patients with coronary artery disease is undetermined. Methods -A prospective, international 1:1 randomized trial was conducted to evaluate in a noninferiority design the relative safety and efficacy of ridaforolimus-eluting stents (RES) and slow-release zotarolimus-eluting stents (ZES) among 1,919 patients at 76 centers undergoing percutaneous coronary intervention...
August 9, 2017: Circulation
https://www.readbyqxmd.com/read/28792156/successful-treatment-of-unprotected-left-main-coronary-bifurcation-lesion-using-minimum-contrast-volume-with-intravascular-ultrasound-guidance
#12
Oh Hyun Lee, Chul Min Ahn, Jung Sun Kim, Byeong Keuk Kim, Young Guk Ko, Donghoon Choi, Yangsoo Jang, Myeong Ki Hong
Contrast-induced nephropathy (CIN) is a serious complication in patients undergoing percutaneous coronary intervention (PCI), and is associated with higher morbidity and mortality. The limiting volume of contrast medium is safest and most reliable strategy for CIN prevention. Intravascular ultrasound (IVUS) serves as an attractive alternative imaging tool to angiography in many steps during PCI, thereby reducing the use of contrast agents. Here, we reported a case of successfully treated unprotected left main bifurcation lesion with heavily calcified and diffuse lesion under the IVUS-guided PCI using low volumes of contrast dye of total 12 cc in an elderly patient...
September 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28789689/impact-of-cd14-cd16-monocytes-on-plaque-vulnerability-in-diabetic-and-non-diabetic-patients-with-asymptomatic-coronary-artery-disease-a-cross-sectional-study
#13
Naofumi Yoshida, Hiroyuki Yamamoto, Toshiro Shinke, Hiromasa Otake, Masaru Kuroda, Daisuke Terashita, Hachidai Takahashi, Kazuhiko Sakaguchi, Yushi Hirota, Takuo Emoto, Hilman Zulkifli Amin, Taiji Mizoguchi, Tomohiro Hayashi, Naoto Sasaki, Tomoya Yamashita, Wataru Ogawa, Ken-Ichi Hirata
BACKGROUND: Previously, we have reported that daily glucose fluctuations could affect coronary plaque vulnerability, but the underlying mechanisms remained unclear. This study sought to investigate the impact of CD14(++)CD16(+) monocytes on plaque vulnerability, as assessed by virtual histology intravascular ultrasound (VH-IVUS), as well as their relationship to fluctuating glucose levels in patients with asymptomatic coronary artery disease (CAD). METHODS: Fifty-one patients with asymptomatic CAD, who were undergoing lipid-lowering therapy and underwent VH-IVUS evaluation for angiographically mild to moderate lesions, were enrolled in the study...
August 8, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28781024/intraluminal-intensity-of-blood-speckle-on-intravascular-ultrasound-a-novel-predictor-of-periprocedural-myocardial-injury-after-coronary-stenting
#14
Yoshiyuki Okuya, Yuichi Saito, Hideki Kitahara, Takashi Nakayama, Yoshihide Fujimoto, Yoshio Kobayashi
The difference in the intraluminal intensity of blood speckle (IBS) on integrated backscatter-intravascular ultrasound (IB-IVUS) across a coronary artery stenosis (i.e., ΔIBS) has previously shown a negative correlation with fractional flow reserve, reflecting an impaired coronary blood flow. Periprocedural myocardial injury (PMI) after coronary stenting has also been associated with coronary circulatory dysfunction. The aim of this study was to investigate the relation between ΔIBS after coronary stenting and PMI...
July 14, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28778096/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...
July 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28766400/transvenous-intravascular-ultrasound-guided-endovascular-treatment-for-chronic-total-occlusion-of-infrainguinal-arteries
#16
Yasuhiro Takahashi, Taisuke Sato, Hirotake Okazaki, Ayaka Nozaki, Masato Matsushita, Masataka Kamiya, Wataru Shimizu
PURPOSE: To investigate the 1-year outcomes of transvenous intravascular ultrasound (IVUS)-guided endovascular therapy (EVT) for chronic total occlusion (CTO) of the lower extremity arteries. METHODS: Transvenous IVUS-guided EVT was performed in 44 patients (50 limbs) with CTO of the femoropopliteal arteries or tibioperoneal trunk. Treatment involved crossing a guidewire through the CTO under the guidance of both fluoroscopic and IVUS imaging, along with insertion of the IVUS catheter into a vein parallel to the target artery...
August 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28764604/optical-coherence-tomography-to-guide-percutaneous-treatment-of-coronary-bifurcation-disease
#17
Mathias Wolfrum, Giovanni Luigi De Maria, Adrian P Banning
Cardiovascular disease remains the most common cause of death worldwide. Enormous progress in the technology and applicability of percutaneous techniques to treat obstructive coronary heart disease has been made, and the number of percutaneous coronary interventions (PCI) is increasing. Coronary bifurcations are involved in a substantial number of PCIs and despite recent advances, bifurcation PCI remains a challenge in terms of immediate success and long-term outcome. Angiography has a limited capacity for showing important features of the 3 dimensional coronary vessel anatomy, position of stent struts and exact wire positions and is therefore suboptimal for guiding bifurcation PCI...
August 2, 2017: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/28764262/relationship-between-automated-coronary-calcium-volumes-and-a-set-of-manual-coronary-lumen-volume-vessel-volume-and-atheroma-volume-in-japanese-diabetic-cohort
#18
Sumit K Banchhor, Narendra D Londhe, Luca Saba, Petia Radeva, John R Laird, Jasjit S Suri
INTRODUCTION: A high degree of correlation exists between Coronary Artery Diseases (CAD) and calcification of the vessel wall. For Percutaneous Coronary Interventional (PCI) planning, it is essential to have an exact understanding of the extent to which calcium volume is correlated to the lumen, vessel, and atheroma volume regions in the coronary artery, which is unclear in recent studies. AIM: Four automated Coronary Calcium Volume (aCCV) measurement methods {threshold, Fuzzy c-Means (FCM), K-means, and Hidden Markov Random Field (HMRF)} and its correlation with three manual (experts) coronary parameters namely: Coronary Vessel Volume (mCVV), Coronary Lumen Volume (mCLV), and Coronary Atheroma Volume (mCAV), was determined in a Japanese diabetic cohort...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28763883/-association-between-the-apob-a1-ratio-and-the-vulnerability-of-lmca-plaque-in-the-patients-with-stable-angina-pectoris
#19
Y Han, C K Yang, C Y Gao, Y H Liu, J T Cheng, X P Wang, Z M Wang, T F Cheng
Objective: To investigate the relationship between ApoB/A1 ratio and the characteristics of tissue components of their left main coronary artery(LMCA)plaque. Methods: A total of 98 patients with stable angina pectoris who received chronic statin treatment underwentpercutaneous coronary intervention in the People's Hospital of Henan Province from June 2010 to June 2016 were included.We prospectively performed intravascular ultrasound virtualhistology (IVUS-VH) to their LMCA and evaluated the tissue characteristics, and the blood level of total cholesterol (TC) and low-density lipoprotein cholesterol(LDL-C), high-density lipoprotein cholesterol(HDL-C), triglyceride(TG), LDL-C/HDL-C ratio, ApoB, ApoA1, ApoB/A1 ratio were measured, then the association of the tissue characteristics with the aboved lipids values were analyzed...
July 18, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28761393/a-combined-intravascular-mri-endoscope-and-intravascular-ultrasound-ivus-transducer-for-high-resolution-image-guided-ablation
#20
Xiaoyang Liu, Nicholas Ellens, Emery Williams, Everette Clif Burdette, Parag Karmarkar, Paul Bottomley
An intravascular MRI (IMRI) loopless antenna is combined for the first time with an intravascular water-cooled ultrasound ablation transducer as a possible tool for providing high-resolution MRI-guided ablations of pathological tissue via intravascular access. High resolution anatomical MRI, and real-time MRI thermometry were used to monitor ablation delivery in phantoms and tissue specimens. Results show that IMRI can guide IVUS-mediated directional ablation with minimal image artifacts. This permits the monitoring of thermal dose and therapy titration while minimizing potential thermal damage to the vessel wall...
April 2017: Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition
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