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https://www.readbyqxmd.com/read/29443790/rotational-atherectomy-ablation-for-an-unexpandable-stent-under-the-guide-of-ivus-a-case-report
#1
Daoyuan Si, Guohui Liu, Yaliang Tong, Yuquan He
RATIONALE: Inadequate stent expansion due to rigid calcified may result in restenosis lesions, but the available options are limited. PATIENT CONCERNS: We report a case via the trans-radial approach of the severely underexpanded freshly deployed stent due to heavily calcified plaques DIAGNOSES:: Coronary angiography revealed that there was no adequate expansion of the freshly deployed stent. INTERVENTIONS: Under the guide of intravascular ultrasound (IVUS), rotational atherectomy (RA) successfully ablated the stent layers and the protruding calcified plaque...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29399529/re-intervention-for-occluded-iliac-vein-stents
#2
REVIEW
Stacey Black, Amy Janicek, M Grace Knuttinen
Iliac vein stenting has become more frequent with improved diagnostic capabilities of intra-vascular ultrasound (IVUS) for recognizing May-Thurner syndrome, chronic venous insufficiency (CVI) and thrombus. In this manuscript, we discuss the reasons for initial stenting, with long-term outcomes and some of the associated pitfalls. The best techniques for re-intervention when iliac stents become occluded will also be discussed.
December 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/29390556/treatment-of-longitudinal-stent-compression-under-intravenous-ultrasound-guidance-a-case-report
#3
Daoyuan Si, Hongliang Yang, Guohui Liu, Yaliang Tong, Yuquan He
RATIONALE: Longitudinal stent compression is a rare phenomenon, which has been increasingly reported in recent years. PATIENT CONCERNS: Following 2 stents implanted into the middle and proximal segments of the left anterior descending (LAD) artery, longitudinal stent compression occurred when a post-dilation balloon was introduced into the proximal stent opening. DIAGNOSE: The intravenous ultrasound (IVUS) examination revealed overlapping at the opening of the proximal stent and poor stent adherence...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29378972/impact-of-the-use-of-intravascular-imaging-on-patients-who-underwent-orbital-atherectomy
#4
Michael S Lee, Evan Shlofmitz, Jeremy Kong, Gentian Lluri, Pratyaksh K Srivastava, Richard Shlofmitz
OBJECTIVES: We assessed the impact of intravascular ultrasound (IVUS)/optical coherence tomography (OCT) on outcomes of patients who underwent orbital atherectomy. BACKGROUND: Intravascular imaging provides enhanced lesion morphology assessment and optimization of percutaneous coronary intervention (PCI) outcomes. Severe coronary artery calcification increases the complexity of PCI and is associated with worse clinical outcomes. Orbital atherectomy modifies calcified plaque, facilitating stent delivery and optimizing stent expansion...
February 2018: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/29367514/intravascular-ultrasound-derived-virtual-fractional-flow-reserve-for-the-assessment-of-myocardial-ischemia
#5
Fumiyasu Seike, Teruyoshi Uetani, Kazuhisa Nishimura, Hiroshi Kawakami, Haruhiko Higashi, Akira Fujii, Jun Aono, Takayuki Nagai, Katsuji Inoue, Jun Suzuki, Shinji Inaba, Takafumi Okura, Kazunori Yasuda, Jitsuo Higaki, Shuntaro Ikeda
BACKGROUND: Fractional flow reserve (FFR) is widely used for the assessment of myocardial ischemia. Intravascular ultrasound (IVUS) is an intracoronary imaging method that provides information about lumen and vessel morphology. Previous studies on the expanded use of IVUS to identify functional ischemia have noted an association between anatomy and physiology, but IVUS-derived minimum lumen area (MLA) has a weak-moderate correlation with myocardial ischemia compared with FFR. We developed a method to calculate FFR using IVUS-derived anatomical information for the assessment of myocardial ischemia...
January 25, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
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
#6
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/29341467/optoacoustic-sensing-of-hematocrit-to-improve-the-accuracy-of-hybrid-fluorescence-ultrasound-intravascular-imaging
#7
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
#8
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/29321385/severe-compression-of-the-left-main-coronary-artery-in-a-patient-with-chronic-thromboembolic-pulmonary-hypertension
#9
Kayo Sugiyama, Nobusato Koizumi, Hitoshi Ogino
Extrinsic compression of the left main coronary artery (LMCA) can occur in patients with an enlarged pulmonary artery trunk secondary to severe pulmonary hypertension (PH). This phenomenon rarely occurs in PH; moreover, few reports have shown that chronic thromboembolic PH can be a triggering factor for this syndrome. Herein, we describe a patient with extrinsic compression of the LMCA with chronic thromboembolic PH who underwent pulmonary endarterectomy and coronary artery bypass grafting successfully. Intravenous ultrasonography (IVUS) was effective for detecting and assessing the compression...
January 10, 2018: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29317977/stemi-due-to-big-ostial-left-main-thrombus-extending-into-aorta-challenging-situation-with-no-clear-guidelines
#10
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/29302473/the-impact-of-ivus-guidance-in-treating-complex-lesions-are-all-complex-lesions-the-same
#11
EDITORIAL
Kayode O Kuku, Alexandre H Kajita, Hector M Garcia-Garcia
No abstract text is available yet for this article.
December 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/29279527/impact-of-water-and-lipid-soluble-statins-on-nonculprit-lesions-in-patients-with-acute-coronary-syndrome
#12
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/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
#13
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
#14
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/29247976/coronary-calcification-as-a-mechanism-of-plaque-media-shrinkage-in-vessels-treated-with-bioresorbable-vascular-scaffold-a-multimodality-intracoronary-imaging-study
#15
Yaping Zeng, Rafael Cavalcante, Carlos Collet, Erhan Tenekecioglu, Yohei Sotomi, Yosuke Miyazaki, Yuki Katagiri, Taku Asano, Mohammad Abdelghani, Shaoping Nie, Christos V Bourantas, Nico Bruining, Yoshinobu Onuma, Patrick W Serruys
BACKGROUND AND AIMS: Whether coronary calcification is correlated with plaque/media shrinkage (PS) remains unclear. The aim of this study was to assess the relationship between the calcification process and PS, combining serial optical coherence tomography (OCT) and intravascular ultrasound (IVUS) in vessels treated with bioresorbable vascular scaffolds (BVS). METHODS: In 15 patients (16 vessels), OCT and IVUS images were matched using anatomic landmarks at post-procedure and five years...
December 2, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/29245834/interrogation-of-a-ring-resonator-ultrasound-sensor-using-a-fiber-mach-zehnder-interferometer
#16
Fellipe Grillo Peternella, Boling Ouyang, Roland Horsten, Michael Haverdings, Pim Kat, Jacob Caro
We experimentally demonstrate an interrogation procedure of a ring-resonator ultrasound sensor using a fiber Mach-Zehnder interferometer (MZI). The sensor comprises a silicon ring resonator (RR) located on a silicon-oxide membrane, designed to have its lowest vibrational mode in the MHz range, which is the range of intravascular ultrasound (IVUS) imaging. Ultrasound incident on the membrane excites its vibrational mode and as a result induces a modulation of the resonance wavelength of the RR, which is a measure of the amplitude of the ultrasound waves...
December 11, 2017: Optics Express
https://www.readbyqxmd.com/read/29243353/first-in-human-evaluation-of-the-vascular-biocompatibility-and-biomechanical-performance-of-a-novel-ultra-high-molecular-weight-amorphous-plla-bioresorbable-scaffold-in-the-absence-of-anti-proliferative-drugs-two-year-imaging-results-in-humans
#17
Miguel Moncada, Juan A Delgado, Antonio Colombo, Pawel Gasior, Kamal Ramzipoor, Alex Estrada, Chang Lee, Danny Dokko, Juan F Granada
OBJECTIVES: In this first-in-human study, we prospectively studied the vascular compatibility and mechanical performance of a novel bare ultra-high molecular weight amorphous PLLA bioresorbable scaffold (BRS, FORTITUDE®, Amaranth Medical, Mountain View, California) up to two years after implantation using multimodality imaging techniques. BACKGROUND: The vascular biocompatibility of polymers used in BRS has not been fully characterized in the absence of anti-proliferative drugs...
December 15, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29241056/segmentation-of-arterial-walls-in-intravascular-ultrasound-cross-sectional-images-using-extremal-region-selection
#18
Mehdi Faraji, Irene Cheng, Iris Naudin, Anup Basu
Intravascular Ultrasound (IVUS) is an intra-operative imaging modality that facilitates observing and appraising the vessel wall structure of the human coronary arteries. Segmentation of arterial wall boundaries from the IVUS images is not only crucial for quantitative analysis of the vessel walls and plaque characteristics, but is also necessary for generating 3D reconstructed models of the artery. The aim of this study is twofold. Firstly, we investigate the feasibility of using a recently proposed region detector, namely Extremal Region of Extremum Level (EREL) to delineate the luminal and media-adventitia borders in IVUS frames acquired by 20 MHz probes...
December 6, 2017: Ultrasonics
https://www.readbyqxmd.com/read/29226575/vulnerable-plaques-more-than-meets-the-i
#19
EDITORIAL
Emile Mehanna, J Dawn Abbott
Intravascular imaging plays a key role in the identification of mechanisms of acute coronary syndromes Post processing IVUS algorithms (IMAP-IVUS and VH-IVUS) for tissue characterization have not been widely adopted due to current limitations Future development will allow easier, faster, and more accurate identification of vulnerable plaques, ultimately allowing prognostication of various interventions.
December 1, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29222206/catastrophic-catheter-induced-coronary-artery-vasospasm-successfully-rescued-using-intravascular-ultrasound-imaging-guidance
#20
Masaki Kodaira, Ryota Tabei, Toshiki Kuno, Yohei Numasawa
A 46-year-old man underwent coronary angiography for stable angina. He developed inferior ST-segment myocardial infarction during the angiography. Intravascular ultrasound (IVUS) findings suggested coronary vasospasm. Intracoronary administration of isosorbide dinitrate restored the coronary flow. This case illustrates the essential role IVUS imaging played in establishing the diagnosis of catheter-induced coronary vasospasm.
December 7, 2017: BMJ Case Reports
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