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Intravascular ultrasound

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https://www.readbyqxmd.com/read/29349382/intravascular-ultrasound-as-a-novel-tool-for-the-diagnosis-and-targeted-treatment-of-functional-popliteal-artery-entrapment-syndrome
#1
Anna E Boniakowski, Frank Davis, Dani Campbell, Minhajuddin Khaja, Katherine A Gallagher
Functional popliteal artery entrapment syndrome can be difficult to diagnose, as the imaging modalities presently employed are designed to detect anatomic entrapment. We describe a novel imaging technique to aid in diagnosis in this cohort. A 22-year-old cyclist presented with exercise-limiting claudication. Magnetic resonance angiography with provocative maneuvers was nondiagnostic. Digital subtraction angiography revealed long-segment occlusion of the popliteal artery with plantar flexion; however, the specific site of compression remained unclear...
June 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29344841/association-of-d-dimer-with-plaque-characteristics-and-plasma-biomarkers-of-oxidation-specific-epitopes-in-stable-subjects-with-coronary-artery-disease
#2
Hema Kothari, Anh T Nguyen, Xiaohong Yang, Yohei Hisada, Sotirios Tsimikas, Nigel Mackman, Angela Taylor, Coleen A McNamara
D-dimer has emerged as a biomarker of cardiovascular event risk, yet pathophysiological factors associated with plasma D-dimer levels in stable coronary artery disease (CAD) subjects are poorly understood. In 106 stable CAD subjects undergoing intravascular ultrasound with virtual histology (IVUS-VH), we measured D-dimer, lipoprotein(a) (Lp(a)), plasminogen, biomarkers reflecting oxidation-specific epitopes (OSE) such as oxidized phospholipids on apolipoprotein B-100 (OxPL-apoB), OxPL on plasminogen (OxPL-PLG), and autoantibodies to phosphorylcholine-BSA [PC-BSA] and a malondialdehyde [MDA] mimotope...
January 17, 2018: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/29344756/the-current-state-of-left-main-percutaneous-coronary-intervention
#3
REVIEW
Harshith R Avula, Andrew N Rassi
PURPOSE OF REVIEW: While coronary artery bypass grafting (CABG) remains the standard of care, advances in stenting technology and procedural technique are changing the role of percutaneous coronary intervention (PCI) in the treatment of severe left main coronary artery (LMCA) disease. We review contemporary evidence comparing PCI and CABG for the treatment of severe LMCA disease, discuss optimal techniques during left main PCI, and provide guidance on studied revascularization strategies within specific patient subgroups...
January 17, 2018: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/29344739/what-we-have-learned-from-the-recent-meta-analyses-on-diagnostic-methods-for-atherosclerotic-plaque-regression
#4
REVIEW
Giuseppe Biondi-Zoccai, Simona Mastrangeli, Enrico Romagnoli, Mariangela Peruzzi, Giacomo Frati, Leonardo Roever, Arturo Giordano
PURPOSE OF REVIEW: Atherosclerosis has major morbidity and mortality implications globally. While it has often been considered an irreversible degenerative process, recent evidence provides compelling proof that atherosclerosis can be reversed. Plaque regression is however difficult to appraise and quantify, with competing diagnostic methods available. Given the potential of evidence synthesis to provide clinical guidance, we aimed to review recent meta-analyses on diagnostic methods for atherosclerotic plaque regression...
January 17, 2018: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/29341467/optoacoustic-sensing-of-hematocrit-to-improve-the-accuracy-of-hybrid-fluorescence-ultrasound-intravascular-imaging
#5
Dmitry Bozhko, Angelos Karlas, Dimitris Gorpas, Vasilis Ntziachristos
Hybrid intravascular fluorescence-ultrasound imaging is emerging for reading anatomical and biological information in vivo. By operating through blood, intravascular near-infrared fluorescence (NIRF) detection is affected by hemoglobin attenuation. Improved quantification has been demonstrated with methods that correct for the attenuation of the optical signal as it propagates through blood. These methods assume an attenuation coefficient for blood and measure the distance between detector and the vessel wall by observing the intravascular ultrasound (IVUS) images...
January 17, 2018: Journal of Biophotonics
https://www.readbyqxmd.com/read/29341060/rationale-of-decreasing-low-density-lipoprotein-cholesterol-below-70-mg-dl-in-patients-with-coronary-artery-disease-a-retrospective-virtual-histology-intravascular-ultrasound-study
#6
Young Hoon Seo, Duck-Jun Seo, In Geol Song, Ki-Hong Kim, Taek-Geun Kwon, Jang-Ho Bae
BACKGROUND: The associations between statin and coronary plaque compositional changes were reported according to the use of high dose or not. An evaluation of the impact of low-density lipoprotein cholesterol (LDL-C) < 70 mg/dL by using real world dosages of statin on coronary plaque composition was undertaken. METHODS: The study subjects consisted of 61 patients (mean 59.9 years old, 45 males) who underwent percutaneous coronary intervention, baseline and follow-up (F/U; mean 8...
January 17, 2018: Cardiology Journal
https://www.readbyqxmd.com/read/29340276/clinical-value-of-ultrasonography-in-diagnosis-of-pulmonary-embolism-in-critically-ill-patients
#7
Ran Zhu, Xiao-Chun Ma
Pulmonary embolism (PE) is a clinical emergency that will increase the mortality if complicated with unstable hemodynamics. Because of its nonspecific clinical symptoms, it's a great challenge to make a PE diagnosis. The golden standard to diagnose PE is computed tomography of pulmonary artery (CTPA), but a diagnosis of PE also composed of evaluation of PE risk factors, possibilities, and risk stratification. Ultrasonography may detect right ventricle strain related to hemodynamic change, intravascular thrombosis, thrombosis in right heart or pulmonary arteries, pulmonary infarction, and local pleural effusion...
December 2017: Journal of Translational Internal Medicine
https://www.readbyqxmd.com/read/29332908/optical-coherence-tomography-guidance-in-management-of-acute-coronary-syndrome-caused-by-plaque-erosion
#8
Haibo Jia, Takashi Kubo, Takashi Akasaka, Bo Yu
For several decades, most physicians have believed that acute coronary syndrome (ACS) is caused by coronary thrombosis resulting from rupture of vulnerable plaque characterized by a thin fibrous cap overlying a large necrotic core and massive inflammatory cell infiltration. However, nearly one-third of ACS cases are caused by plaque erosion characterized by intact fibrous cap, less or absent necrotic core, less inflammation, and large lumen. Because of the limitations of current imaging modalities, including angiography and intravascular ultrasound, the importance of plaque erosion as a cause of acute coronary events is less well known...
January 13, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29321430/new-onset-takayasu-s-arteritis-as-acute-myocardial-infarction
#9
Yusuke Ishiyama, Kazuo Eguchi, Katsuaki Yokota, Tomokazu Ikemoto, Kazuomi Kario
We herein report the case of a 25-year-old Japanese woman with left-main-trunk acute myocardial infarction (LMT-AMI). She had cardiogenic shock, so emergency percutaneous intervention was performed. Intravascular ultrasound of LMT-AMI showed that the three-layered structure of the intima, tunica media, and adventitia was not clearly visible, and the vessel was concentrically thickened; unstable plaque and calcification were not seen. AMI is rarely seen in young women, but Takayasu's arteritis is one major cause...
January 11, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29321426/percutaneous-coronary-intervention-for-a-patient-with-left-main-coronary-compression-syndrome
#10
Ryutaro Ikegami, Kazuyuki Ozaki, Takuaya Ozawa, Satoru Hirono, Masahiro Ito, Tohru Minamino
Left main coronary compression syndrome rarely occurs in patients with severe pulmonary hypertension. A 65-year-old woman with severe pulmonary hypertension due to an atrial septal defect suffered from angina on effort. Cardiac computed-tomography and coronary angiography revealed considerable stenosis of the left main coronary artery (LMA) caused by compression between the dilated main pulmonary artery trunk and the sinus of valsalva. Stenting of the LMA under intravascular ultrasound imaging was effective for the treatment of angina...
January 11, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29317990/artefactual-angulated-lesion-on-angiography-a-case-report-and-review-of-literature
#11
Sadat Ali Edroos, Jeremy William Sayer
We present a case of a patient who presented with chest pain, and on diagnostic coronary angiography appeared to have a grossly angulated yet significant coronary stenosis. This was proven to be an artefactual appearance on further assessment with intravascular ultrasound imaging. We describe the causes and associations of coronary tortuosity with other arteriopathy, and highlight challenges in the interpretation of tortuous vessels to accurately assess luminal narrowing and suitability for coronary intervention...
December 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/29317977/stemi-due-to-big-ostial-left-main-thrombus-extending-into-aorta-challenging-situation-with-no-clear-guidelines
#12
Mohammady Shahin, Oliver Gaemperli, Patrick Siegrist, Jasmina Alibegovic
Extensive left main (LM) coronary artery thrombus is a rare and life-threatening angiographic finding with usual dramatic clinical presentation including hemodynamic instability and sudden cardiac death. The proper management of a big LM thrombus extending into aorta remains a challenging issue with no clear guidelines. In the following case report we present a 45-year-old patient with no apparent risk factors for coronary artery disease who presented with acute infero-lateral ST-elevation myocardial infarction (STEMI)...
December 2017: Cardiology Research
https://www.readbyqxmd.com/read/29311285/lumenrecon-guidewire-pilot-study-of-a-novel-nonimaging-technology-for-accurate-vessel-sizing-and-delivery-of-therapy-in-femoropopliteal-disease
#13
Pradeep K Nair, Jeffrey G Carr, Brian Bigelow, Deepak L Bhatt, Zachary C Berwick, George Adams
BACKGROUND: Proper vessel sizing during endovascular interventions is crucial to avoid adverse procedural and clinical outcomes. LumenRECON (LR) is a novel, nonimaging, 0.035-inch wire-based technology that uses the physics-based principle of Ohm's law to provide a simple, real-time luminal size while also providing a platform for therapy delivery. This study evaluated the accuracy, reliability, and safety of the LR system in patients presenting for a femoropopliteal artery intervention...
January 2018: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29290601/the-initial-report-on-1-year-outcomes-of-the-feasibility-study-of-the-veniti-vici-venous-stent-in-symptomatic-iliofemoral-venous-obstruction
#14
Mahmood Razavi, William Marston, Stephen Black, Dana Bentley, Peter Neglén
OBJECTIVE: The objective of this study was to assess the safety and efficacy of a dedicated venous stent (the VICI VENOUS STENT; VENITI, Fremont, Calif) for treatment of symptomatic iliofemoral venous outflow obstruction. METHODS: Thirty patients (24 female; median age, 43 years) were enrolled in the feasibility phase of an international, multicenter investigational device exemption trial from June 2014 to February 2015. All patients exhibited unilateral venous disease with ≥50% stenosis in the iliofemoral veins...
December 28, 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/29279529/optical-frequency-domain-imaging-of-very-late-stent-thrombosis-following-bare-metal-stent-implantation-for-acute-myocardial-infarction
#15
Shinichiro Masuda, Takashi Shibui, Ryuki Kawamura, Hitoshi Saiki, Akihiro Hata
A 43-year-old man was admitted to our hospital with ST-segment elevation acute coronary syndrome. He had experienced myocardial infarction 19 months previously, and a bare-metal stent (BMS) had been implanted in the culprit distal right coronary artery at another hospital. Emergency coronary angiography showed thrombotic in-stent occlusion of the BMS. Intravascular ultrasound revealed an undersized stent compared with the size of the vessel and late stent malapposition (LSM) with abundant thrombi. The lesion was successfully recanalized via thrombectomy and plain old balloon angioplasty...
December 27, 2017: International Heart Journal
https://www.readbyqxmd.com/read/29279527/impact-of-water-and-lipid-soluble-statins-on-nonculprit-lesions-in-patients-with-acute-coronary-syndrome
#16
Yu Ishikawa, Tomonori Itoh, Mamoru Satoh, Tetsuya Fusazaki, Shoma Sugawara, Satoshi Nakajima, Motoyuki Nakamura, Yoshihiro Morino
Statins can be differentiated into two types, based on their solubility, which have potentially differing effects on the coronary artery wall. However, suspected differences in statins' effects on plaque composition have not been systemically investigated.Sixty-seven patients with acute coronary syndrome (ACS) were randomly assigned to either atorvastatin (10 mg/day) or rosuvastatin (2.5 mg/day). Intravascular ultrasound (IVUS) and integrated backscatter (IB)-IVUS, an established tool to quantify each plaque's components, were performed immediately after emergent percutaneous coronary intervention (PCI)...
December 27, 2017: International Heart Journal
https://www.readbyqxmd.com/read/29276441/bioresorbable-scaffolds-in-spontaneous-coronary-artery-dissection-long-term-follow-up-in-4-patients
#17
Santiago Jesús Camacho Freire, Antonio Enrique Gómez Menchero, Jessica Roa Garrido, Javier León Jiménez, Rosa Cardenal Piris, José Francisco Díaz Fernández
Spontaneous coronary artery dissection is a rare condition, and diagnosis and treatment are challenging among patients who present with acute coronary syndrome. Typically, the condition affects young females who have no underlying atherosclerotic disease. To date, few cases of bioresorbable scaffold implantation for the treatment of spontaneous coronary artery dissection have been reported. Therefore, we describe the cases of 4 patients whom we treated with scaffolds. We evaluated the long-term results by using intravascular ultrasound and optical coherence tomographic scanning...
December 2017: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/29274686/fluid-structure-interaction-models-based-on-patient-specific-ivus-at-baseline-and-follow-up-for-prediction-of-coronary-plaque-progression-by-morphological-and-biomechanical-factors-a-preliminary-study
#18
Liang Wang, Dalin Tang, Akiko Maehara, Zheyang Wu, Chun Yang, David Muccigrosso, Jie Zheng, Richard Bach, Kristen L Billiar, Gary S Mintz
Plaque morphology and biomechanics are believed to be closely associated with plaque progression. In this paper, we test the hypothesis that integrating morphological and biomechanical risk factors would result in better predictive power for plaque progression prediction. A sample size of 374 intravascular ultrasound (IVUS) slices was obtained from 9 patients with IVUS follow-up data. 3D fluid-structure interaction models were constructed to obtain both structural stress/strain and fluid biomechanical conditions...
December 15, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29260577/coronary-computed-tomography-in-heart-transplant-patients-detection-of-significant-stenosis-and-cardiac-allograft-vasculopathy-image-quality-and-radiation-dose
#19
Anne Günther, Lars Aaberge, Andreas Abildgaard, Asgrimur Ragnarsson, Thor Edvardsen, Jarl Jakobsen, Rune Andersen
Background Cardiac allograft vasculopathy (CAV) is an accelerated form of atherosclerosis unique to heart transplant (HTX) patients. Purpose To investigate the detection of significant coronary artery stenosis and CAV, determinants of image quality, and the radiation dose in coronary computed tomography angiography (CCTA) of HTX patients with 64-slice multidetector CT (64-MDCT). Material and Methods Fifty-two HTX recipients scheduled for invasive coronary angiography (ICA) were prospectively enrolled and underwent CCTA before ICA with intravascular ultrasound (IVUS)...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/29259515/intravascular-ultrasound-guided-cardiac-intervention-in-a-fontan-patient-with-allergy-to-contrast-media
#20
Jun Muneuchi, Seigo Okada, Yusaku Nagatomo, Chiaki Iida, Ryouhei Matsuoka, Masamitsu Shirozu, Mamie Watanabe
Allergy to contrast media is hazardous in patients who need multiple cardiac catheterizations. We describe the case of a 16-year-old boy who presented with fatigue and cyanosis. He had undergone a Fontan operation 14 years previously, after which he developed an allergy to iodinated contrast media. Contrast echocardiograms by manual injection of microbubbles suggested the presence of a venovenous collateral vessel from the brachiocephalic vein draining into the pulmonary vein. We used intravascular ultrasound as the sole imaging method to identify the target vessel and to guide deployment of an Amplatzer Vascular Plug II...
October 2017: Texas Heart Institute Journal
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