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Intravascular ultrasound

Maria Ceja Rodriguez, Augustus Realyvasquez, Joseph Galante, William Pevec, Misty Humphries
No abstract text is available yet for this article.
August 2016: Journal of Vascular Surgery
Mark J Schuuring, Peter I Bonta, Michele van Vugt, Frank Smithuis, Otto M van Delden, Jouke T Annema, Kees Stijnis
A 44-year-old woman with a history of pulmonary embolism and abdominal echinococcosis complained of sudden thoracic pain and shortness of breath. A D-dimer of 77.5 mg/l (reference ≤0.5 mg/l) was found. Chest CT scan revealed obstruction of the right lower and middle lobe pulmonary artery (PA). Anticoagulation therapy was initiated for the presumed diagnosis of recurrent pulmonary embolism. However, due to persistent symptoms of dyspnea, follow-up CT angiography of the chest was performed 3 months later. A persistent PA obstruction was found and the presumed diagnosis of embolism was questioned...
October 20, 2016: Respiration; International Review of Thoracic Diseases
Dae Young Hyun, Myung Ho Jeong, Doo Sun Sim, Yun Ah Jeong, Kyung Hoon Cho, Min Chul Kim, Hyun Kuk Kim, Hae Chang Jeong, Keun Ho Park, Young Joon Hong, Jun Han Kim, Youngkeun Ahn, Jung Chaee Kang
Background/Aims: This study appraised the long term clinical outcomes of patients treated with percutaneous coronary intervention (PCI) for unprotected left main coronary artery (ULMCA) disease. There are limited data regarding long-term clinical outcomes after PCI for ULMCA disease. Methods: From 2001 to 2011, a total of 448 patients who underwent PCI for ULMCA disease and had 2-year clinical follow-up, were analyzed. The study patients were divided into two groups: group I (stable angina pectoris [SAP], n = 60, 48 men, 62 ± 10 years) and group II (acute coronary syndrome [ACS], n = 388, 291 men, 64 ± 10 years)...
October 18, 2016: Korean Journal of Internal Medicine
Nermina Buljubasic, K Martijn Akkerhuis, Jin M Cheng, Rohit M Oemrawsingh, Hector M Garcia-Garcia, Sanneke P M de Boer, Evelyn Regar, Robert-Jan M van Geuns, Patrick W J C Serruys, Eric Boersma, Isabella Kardys
OBJECTIVE: The aim of this study was to provide additional insight into the role of fibrinogen in coronary artery disease by investigating the associations between plasma fibrinogen with both degree and composition of coronary atherosclerosis as determined by virtual histology-intravascular ultrasound. PATIENTS AND METHODS: In 581 patients undergoing coronary angiography for acute coronary syndrome (ACS) or stable angina pectoris, preprocedural blood samples were drawn for fibrinogen, C-reactive protein (CRP), interleukin-6, and plasminogen activator inhibitor-1 measurements, and virtual histology-intravascular ultrasound of a nonculprit coronary artery was performed...
October 14, 2016: Coronary Artery Disease
Donghoon Choi
: Atherosclerotic renal artery stenosis is an increasingly recognized medical problem especially in elderly patients. It commonly occurs with systemic manifestations including hypertension (HTN), chronic kidney disease (CKD) or atherosclerotic diseases including coronary or peripheral artery disease. Significant renal artery stenosis may result in HTN, ischemic nephropathy, however it is still in debate about the benefit of revascularization. Although several randomized controlled trials including Angioplasty and Stenting for Renal Artery Lesions (ASTRAL) and Cardiovascular Outcomes in Renal Atherosclerotic Lesions (CORAL) study has failed to reveal a significant benefit of angioplasty, angioplasty with medical therapy is increasingly accepted in some patients with certain clinical conditions...
September 2016: Journal of Hypertension
Arindam Pande, Soumya Patra, Manabhanjan Jena, Rabin Chakraborty
Thirty-nine year male had a history of road traffic accident with polytrauma. At emergency room he started having chest pain with ventricular tachycardia. He was subsequentially diagnosed with right coronary artery dissection secondary to blunt trauma which is an extremely rare cause of inferior wall myocardial infarction. After some dilemmas, he was ultimately treated with intravascular ultrasound guided coronary angioplasty with stenting and had an uneventful recovery.
September 2016: Indian Heart Journal
Dong-Ho Shin, Sung-Jin Hong, Gary S Mintz, Jung-Sun Kim, Byeong-Keuk Kim, Young-Guk Ko, Donghoon Choi, Yangsoo Jang, Myeong-Ki Hong
OBJECTIVES: The aim of this study was to evaluate the clinical usefulness of intravascular ultrasound (IVUS)-guided new-generation drug-eluting stent (DES) implantation using a meta-analysis of individual patient-level data from randomized trials. BACKGROUND: Published randomized trials that compare IVUS-guided versus angiography-guided new-generation DES implantation are scarce. METHODS: Searches of the MEDLINE, Embase, and Cochrane databases were performed to find randomized trials that compared IVUS-guided versus angiography-guided new-generation DES implantation...
October 6, 2016: JACC. Cardiovascular Interventions
Harold L Dauerman
No abstract text is available yet for this article.
October 6, 2016: JACC. Cardiovascular Interventions
James Torey, Anwar Zaitoun, Thomas Lalonde, John Runyon, Jihad Mustapha, Thomas Davis
OBJECTIVES: CENTRAL was a prospective, multicenter, 100 patient study designed to evaluate the ability of a recanalization catheter system to cross chronic total occlusions (CTOs) of the superficial femoral artery while staying within the central vessel lumen. METHODS: The primary endpoint was the successful crossing of a CTO (≥90% of the length) with the recanalization catheter in the central lumen of the superficial femoral artery in at least one-half of the studied patient population, confirmed by intravascular ultrasound...
October 15, 2016: Journal of Invasive Cardiology
Wolfgang Wiedemair, Zeljko Tukovic, Hrvoje Jasak, Dimos Poulikakos, Vartan Kurtcuoglu
Encapsulated microbubbles (MBs) serve as endovascular agents in a wide range of medical ultrasound applications. The oscillatory response of these agents to ultrasonic excitation is determined by MB size, gas content, viscoelastic shell properties and geometrical constraints. The viscoelastic parameters of the MB capsule vary during an oscillation cycle and change irreversibly upon shell rupture. The latter results in marked stress changes on the endothelium of capillary blood vessels due to altered MB dynamics...
October 12, 2016: Biomechanics and Modeling in Mechanobiology
Zhi-Geng Jin, Zhuo-Qi Zhang, Li-Min Jing, Yu-Jie Wei, Jiao Zhang, Jian-Ping Luo, Sheng-Li Yang, Dong-Xing Ma, Ying Liu, Wei Han, Yong Yang, Hui-Liang Liu
The purpose of this study was to evaluate the accuracy of dual-axis rotational coronary angiography (DARCA) for coronary lesion assessment by directly comparing with intravascular ultrasound (IVUS). From October 2014 to December 2015, 40 patients (58 lesions) who had undergone both DARCA and IVUS were included in the image analysis. The minimum lumen diameter (MLD), lesion length, reference vessel diameter (RVD) and percent diameter stenosis at the same lesion, were identified and assessed. Significant correlation with IVUS was found for DARCA in either lesion length (r = 0...
October 11, 2016: International Journal of Cardiovascular Imaging
Hirohiko Ando, Akihiro Suzuki, Shinichiro Sakurai, Soichiro Kumagai, Akiyoshi Kurita, Katsuhisa Waseda, Hiroaki Takashima, Tetsuya Amano
Although late restenosis is one of the long-term complications of stent implantation, its pathogenesis has not been fully elucidated. For consecutive patients who developed in-stent restenosis (ISR) after stent implantation, integrated backscatter (IB) intravascular ultrasound was performed for ISR lesions. The tissue characteristics of neointima within the stented segment were compared between lesions with early restenosis and those with late restenosis. Of 73 ISR lesions arising after sirolimus-eluting stent (SES; n = 25) or bare-metal stent (BMS; n = 48) implantation, early and late restenosis were documented in 52 and 21 lesions, respectively...
October 11, 2016: Heart and Vessels
Giovanni Teruzzi, Giuseppe Calligaris, Paolo Ravagnani, Daniela Trabattoni, Luca Grancini, Giovanni Monizzi, Alessandro Lualdi, Antonio L Bartorelli
Spontaneous coronary artery dissection (SCAD) accounts approximately for 0.2% of cases of acute coronary syndrome. It is defined "spontaneous" in absence of any coronary wall damage. This disease affects primarily young women in good health, with no risk factors for coronary artery disease, especially during the postpartum period. Since the clinical presentation varies widely from no symptoms to typical angina and sudden cardiac death, SCAD incidence is underestimated.A 40-year-old woman, in the 8th week after delivery, was admitted to our emergency department because of acute chest pain, and a diagnosis of inferior and posterior non-ST-elevation myocardial infarction was made...
October 2016: Giornale Italiano di Cardiologia
Shinsuke Mori, Keisuke Hirano, Yoshiaki Ito, Masahiro Yamawaki, Motoharu Araki, Norihiro Kobayashi, Hideyuki Takimura, Yasunari Sakamoto, Masakazu Tsutsumi, Takuro Takama, Yohsuke Honda, Takahiro Tokuda, Kenji Makino, Shigemitsu Shirai
AIM: To investigate the relationship between intravascular ultrasound (IVUS) findings and restenosis after stent implantation for long occlusive femoropopliteal (FP) lesions using the intraluminal approach. METHODS: This was a single-center retrospective study of 45 patients (49 lesions) with de novo long occlusive FP lesions treated with bare metal stents implanted using the intraluminal approach under IVUS guidance from April 2007 to December 2014. All patients were followed up at least 12 months...
October 1, 2016: Journal of Atherosclerosis and Thrombosis
Jae-Sik Jang, Ho-Cheol Shin, Jong Seok Bae, Han-Young Jin, Jeong-Sook Seo, Tae-Hyun Yang, Dae-Kyeong Kim, Kyoung-Im Cho, Bo-Hyun Kim, Yong Hyun Park, Hyung-Gon Je, Dong-Soo Kim
BACKGROUND AND OBJECTIVES: Intravascular ultrasound (IVUS)-guided percutaneous coronary intervention frequently results in unnecessary stenting due to the low positive predictive value of IVUS-derived minimal lumen area (MLA) for identification of functionally significant coronary stenosis. We appraised the diagnostic accuracy of IVUS-derived MLA compared with the fractional flow reserve (FFR) to assess intermediate coronary stenosis. SUBJECTS AND METHODS: We searched MEDLINE and Cochrane databases for studies using IVUS and FFR methods to establish the best MLA cut-off values to predict significant non-left main coronary artery stenosis...
September 2016: Korean Circulation Journal
H M Nef, O Dörr, H Möllmann, A Elsässer
Bifurcation lesions are a therapeutic challenge in the interventional treatment of coronary artery disease. Thus, consideration of anatomical aspects and selection of the most appropriate strategy for an individual bifurcation have an impact on the interventional outcome. Accordingly, assessment of the type of bifurcation stenosis, including the relevance of the side branches, vessel diameter and the angle between the two branches are critical for the optimal choice of interventional strategy. The fractional flow reserve (FFR) is a parameter that provides a measure of the severity of coronary stenosis and despite some limitations, FFR can be applied to bifurcation lesions...
October 7, 2016: Herz
Muhammad Muzaffar Mahmood, David Austin
Spontaneous coronary artery dissection (SCAD) is an uncommon but important cause of acute coronary syndrome. The diagnosis of SCAD by an angiogram alone can be challenging and the increasing use of intracoronary imaging has proven an invaluable diagnostic adjunct in this regard. The appropriate initial management of SCAD has been a matter of significant debate. Owing to frequent spontaneous healing of coronary dissection and a higher risk of complications with percutaneous coronary intervention (PCI) in the setting of SCAD, a default approach of mechanical revascularization is not recommended...
September 18, 2016: Cardiovascular Revascularization Medicine: Including Molecular Interventions
Soo-Jin Kang, Hojin Ha, June-Goo Lee, Seung-Bong Han, Gary S Mintz, Jihoon Kweon, Mineok Chang, Jae-Hyung Roh, Pil Hyung Lee, Sung-Han Yoon, Jung-Min Ahn, Duk-Woo Park, Seung-Whan Lee, Cheol Whan Lee, Seong-Wook Park, Seung-Jung Park, Young-Hak Kim
BACKGROUND AND AIMS: We aimed to determine whether finite element analysis (FEA)-derived plaque structural stress (PSS) analysis can predict serial changes in atheroma volume, type, and tissue composition within a fibroatheroma-containing target segment. METHODS: Overall, 210 patients (210 untreated coronary artery lesions) underwent serial (baseline and 12-month follow-up) grayscale- and virtual histology (VH)-intravascular ultrasound (IVUS). Baseline PSS was assessed at the minimal lumen and at the maximum necrotic core (NC) sites...
September 30, 2016: Atherosclerosis
Hung-Hao Lee, Po-Chao Hsu, Wen-Hsien Lee, Chun-Yuan Chu, Ho-Ming Su, Tsung-Hsien Lin, Wen-Chol Voon, Wen-Ter Lai, Sheng-Hsiung Sheu, Cheng-An Chiu
A 66-year-old male was treated percutaneously for a bifurcation lesion of the left anterior descending coronary artery by provisional stenting using the jailed wire technique. After successfully stenting the main branch, retraction of the looped main branch guidewire was impossible. After using an intravascular ultrasound we discovered the guidewire was entangled with a stent strut. Thereafter, the proximal stent elongated after retraction. With the support of an over-the-wire microcatheter, we finally pulled out the entrapped guidewire...
September 2016: Acta Cardiol Sin
Alfredo R Galassi, Satoru Sumitsuji, Marouane Boukhris, Emmanouil S Brilakis, Carlo Di Mario, Roberto Garbo, James C Spratt, Evald H Christiansen, Andrea Gagnor, Alexandre Avran, Georgios Sianos, Gerald S Werner
Intravascular ultrasound has been used for >20 years to guide percutaneous coronary intervention in different subsets of coronary lesions. During the last decade, the interest in percutaneous coronary intervention for chronic total occlusion (CTO) has increased dramatically, leading to high success rates. Failure of guidewire crossing is the most common reason for failed CTO attempts. Certain angiographic features, such as blunt proximal CTO cap, tortuosity, heavy calcification, and lack of visibility of path in the distal vessel, increase procedural difficulty...
October 10, 2016: JACC. Cardiovascular Interventions
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