The co-primary endpoint of change in percent atheroma volume was reduced by a mean of 0.98% (p < 0.001 vs. baseline). Regression in percent atheroma volume was observed in 63.6% of patients and progression in 36.4%. The other co-primary endpoint, change in nominal atheroma volume in the 10 mm subsegment with the greatest disease severity at baseline, was also reduced (mean -6.1 mm3, p < 0.001 vs. baseline). Total atheroma volume was also reduced at follow-up by a mean of -14.7 mm3 (p < 0.001). IVUS results were similar in the prespecified subgroups. Adverse events leading to study drug discontinuation included musculoskeletal complaints (3.7%) and cardiovascular disorders (4.3%). There were no cases of rhabdomyolysis.. ...
AIMS:. To investigate whether the use of intravascular ultrasound virtual histology (IVUS-VH) leads to any improvements in stent deployment, when performed in patients considered to have had an optimal percutaneous coronary intervention (PCI) by quantitative coronary angiography (QCA).. METHODS AND RESULTS:. After optimal PCI result (residual stenosis by QCA,30%), IVUS-VH was performed in 100 patients by protocol, with the option to use the information left to the discretion of the operators. Patients were categorised as: Group1 (n=54), where the IVUS-VH findings were used to evaluate the need for further optimisation of the stent deployment; and Group2 (n=46), where the IVUS-VH was documentary such that the stenting results were considered optimal according to QCA. Optimal stent deployment on IVUS-VH was defined as: normal stent expansion, absence of stent malapposition, complete lesion coverage as indicated by a plaque burden (PB%) between 30-40% and necrotic core confluent to the lumen,10% or ...
Traditionally, arterial remodeling has been assessed by the ratio of lumen and external elastic membrane area at the diseased region over the lumen and external elastic membrane area of an adjacent, presumed healthy, reference site at a single time point.16 However, this approach has several major limitations (eg, occurrence of atherosclerosis and remodeling in the reference site, effect of arterial tapering, and subjectivity in identifying a single presumed "normal" reference site).16 Recently, a serial approach was also introduced in which the lumen and external elastic membrane area in a given arterial region are compared between 2 time points.16 Although this approach is pathobiologically valid, it was not applicable in our experimental model because of the confounding effect of normal arterial growth on arterial remodeling. To overcome the limitations of the aforementioned remodeling approaches, we used a revised approach, which is basically a modification of the standard methodology for ...
Approach and Results-Ex vivo coronary NIRS and IVUS imaging was performed through blood in 116 coronary arteries of 51 autopsied hearts, followed by 2-mm block sectioning (n=2070) and histological grading according to modified American Heart Association criteria. Lesions were defined as the most heavily diseased 2-mm block per imaged artery on IVUS. IVUS-derived PB and NIRS-derived lipid core burden index (LCBI) of each block and lesion were analyzed. Block-level analysis demonstrated significant trends of increasing PB and LCBI across more complex atheroma (Ptrend ,0.001 for both LCBI and PB). Lesion-based analyses demonstrated the highest LCBI and remodeling index within coronary fibroatheroma (Ptrend ,0.001 and 0.02 versus all plaque groups, respectively). Prediction models demonstrated similar abilities of PB, LCBI, and remodeling index for discriminating fibroatheroma (c indices: 0.675, 0.712, and 0.672, respectively). A combined PB+LCBI analysis significantly improved fibroatheroma ...
We used optical coherent tomography (OCT) and virtual histology intravascular ultrasound (VH-IVUS) to assess culprit lesions in 146 Korean pts with acute coronary syndrome (ACS).. Methods: Culprit lesion plaque rupture (PR) or plaque erosion (PE) was diagnosed with OCT; and IVUS was used to determine arterial remodeling. PE (n=56) was the presence of intracoronary thrombus attached to the luminal surface with no detectable signs of fibrous cap rupture that was seen in 90 ACS pts with PR. Positive remodeling was a remodeling index (lesion/reference EEM [external elastic membrane] area) ,1.05.. Results: Pt age was 60±12 yrs in PR and 62±11 yrs in PE; 19% of PR vs 18% of PE were females. Overall, 25% (14/56) of PE had non-ST elevation myocardial infarction (NSTEMI) and 34% (19/56) had STEMI; conversely, 14.4% (13/90) of PR had NSTEMI and 71% (64/90) had STEMI (p,0.0001). Vessel size, minimal lumen area, and lumen area at the PR or PE site were similar; however, lesion length was longer in PR. ...
Data are mean value ± SD, unless otherwise indicated. ANOVA = analysis of variance; CSA = cross-sectional area; EEM = external elastic membrane; P+M = plaque plus media; Δ = change in.. ...
Intravascular ultrasonography is an invasive imaging procedure that provides intravascular images of the coronary arteries and other blood vessels. Intravascular ultrasonography has played a critical role in enhancing the understanding of coronary atherosclerosis pathophysiology and has facilitated the refinement of diagnostic and therapeutic...
0016]Turning initially to FIG. 1, a tissue/plaque characterization system 100 is schematically depicted. An intravascular ultrasound console 110 is communicatively coupled to an IVUS catheter 120. The IVUS catheter 120 comprises a distally mounted ultrasound transducer probe 122 that acquires backscatter data (e.g., IVUS data) from a blood vessel. In accordance with known IVUS catheters, the catheter 120 is maneuvered through a patients body (e.g., via a femoral artery) to a point of interest. The transducer probe 122 is then controlled, via the console 110 to emit ultrasound pulses and thereafter receive echoes or backscattered signals reflected from vascular tissue/plaque and blood. Because different types and densities of tissue absorb and reflect the ultrasound pulse differently, the reflected data (i.e., IVUS data) signals transmitted back to the console 110 by the IVUS catheter 120, is converted by characterization software into images of vascular objects. It should be appreciated that ...
In a previous report, Bocksch et al. [13]performed intravascular ultrasound in patients with an acute myocardial infarction before percutaneous transluminal coronary angioplasty. Intracoronary ultrasound permitted differentiation between pulsatile, low echogenic intraluminal material suggesting thrombus and mural highly echogenic atherosclerotic plaque in 22 (88%) of 25 patients. A negative silhouette of the intravascular ultrasound device was documented within the low echogenic material in 17 (68%) of 25 patients. Low echogenic intraluminal material was found in 18 (72%) of 25 segments proximal to and in 12 (48%) of 25 segments distal to the highly echogenic plaque, indicating prestenotic and post-stenotic thrombus [13]. Walton et al. [14]reported a case in which the intravascular ultrasonographic images obtained before angioplasty revealed total occlusion of the vessel, with plaque and bright speckled material suspected of being thrombus.. In the present study, there were four patients with ...
Color-flow intravascular sonography was introduced to provide a greater understanding of intraluminal blood flow, lumen size, success of endovascular treatment, and the interface between the vessel wall and the blood stream.7 Real-time images are produced from the transducer of the intravascular sonography apparatus at 30 frames per second. The difference between 2 sequential adjacent frames is detected by computer software producing the color-flow intravascular sonography images. Red demonstrates the movement of echogenic blood particles through the artery. A transition in the color representation from red to orange is seen when there is a vascular stenosis, resulting in an increase in the speed of blood through that segment.7 The main benefit of color-flow intravascular sonography lies in its ability to distinguish luminal blood flow from the dark echolucent disease along the vessel wall.19,60,61. Color-flow intravascular sonography can also identify soft echolucent plaques, ulcerations, ...
This randomized IVUS-guided versus angiography-guided DES implantation trial in long lesions demonstrated that a strategy of routine IVUS did not improve the MACE at 1 year following intervention. The IVUS use per operator decision was associated with improved results. Although there was only a trend toward a reduction in the primary endpoint (1-year MACE) when patients were analyzed according to the intention-to-treat principle, 15.0% of the patients in the angiography arm were actually treated with IVUS guidance whereas IVUS was not performed in 4.8% of the patients assigned to IVUS guidance. Therefore, when patients were analyzed according to how they were actually treated, IVUS guidance resulted in a statistically significant decrease in MACE from 8.1% to 4.0% (p = 0.048).. Although IVUS has been useful for evaluating lesion morphology and optimizing PCI procedures, especially in complex lesions, the beneficial role of IVUS guidance in routine clinical practice has been controversial. In the ...
Virtual histology intravascular ultrasound (VH-IVUS) is a clinically available technique for atherosclerosis plaque characterization. It, however, suffers from a poor longitudinal resolution due to electrocardiogram (ECG)-gated acquisition. This article presents an effective algorithm for IVUS image-based histology to overcome this limitation. After plaque area extraction within an input IVUS image, a textural analysis procedure consisting of feature extraction and classification steps is proposed. The pixels of the extracted plaque area excluding the shadow region were classified into one of the three plaque components of fibro-fatty (FF), calcification (CA) or necrotic core (NC) tissues. The average classification accuracy for pixel and region based validations is 75% and 87% respectively. Sensitivities (specificities) were 79% (85%) for CA, 81% (90%) for FF and 52% (82%) for NC. The kappa (k)50.61 and p value50.02 indicate good agreement of the proposed method withVHimages. Finally, the ...
A system and method are provided for using a first vascular image, or more particularly a plurality of control points located thereon, to identify a border on a second vascular image. Embodiments of the present invention operate in accordance with an intra-vascular ultrasound (IVUS) device and a computing device electrically connected thereto. In one embodiment, the computing device includes a plurality of applications operating thereon that are used to (I) identify a border and control points on a first IVUS image (i.e., any IVUS image), (ii) extrapolate the control points to a second IVUS image (i.e., another IVUS image), (iii) identify a border on the second IVUS image, and (iv) adjust the border on the second IVUS image in accordance with at least one factor.
Global Intravascular Ultrasound Devices Market by Manufacturers, Regions, Type and Application, Forecast to 2021"Purchase This Report by calling ResearchnReports.com at +1-888-631-6977.. A research was lead in a prevalent period of time in the first half of the year in order to get information about the nature and growth of Intravascular Ultrasound Devices market. Data included in this report is cross-checked & referred to several other researches to validate them.. TO ensure that the data assembled is reliable, sources of information used are confirmed as legitimate and valid. The sources include Annual reports on the Intravascular Ultrasound Devices market, Government reports, global news, and business credit reports. Likewise there were interviews held with the customers, market experts and so forth. Insights from them were key in identifying and understanding the inner workings of the global Intravascular Ultrasound Devices market.. To assess the worldwide growth of the market, there was an ...
Previous angiographic natural history studies, such as CASS, demonstrated that patients with normal coronary arteries have a relatively benign prognosis. Like PROSPECT, CASS defined normal coronary arteries as having ,30% diameter stenosis by visual estimation (14,15). Glagov et al. (16) described the concept of "compensated remodeling" and concluded that compensation by vessel enlargement failed and luminal encroachment began when plaque accumulation (i.e., plaque burden) exceeded (on average) 40% of EEM area. Many plaque regression and progression studies have reported an average overall plaque burden in the study segments of approximately 40% (17,18). Many IVUS substudies of interventional trials have reported an average reference segment plaque burden of 40% (19). Again, this justifies the use of a plaque burden of 40% as the minimal threshold to define a lesion.. The minimal reported length of a pathologic TCFA is 1 to 2 mm (20-22). Antegrade or retrograde movement of an IVUS catheter ...
The current analysis by Zheng et al. (12), in this issue of iJACC, was to evaluate fibroatheroma characteristics predictive of the presence of plaque rupture-the relative importance of plaque burden, lesion location, and vessel area. Seventy-four ruptured and 2,396 nonruptured nonculprit lesion fibroatheromas were identified and classified as proximal, mid, or distal based on distance from the ostium. Most of the fibroatheromas were either in the proximal or mid segments. Independent predictors of plaque rupture were: distance from the ostium to the maximum necrotic core site, plaque burden, vessel area, presence of dense calcium, and RCA location. By receiver operating characteristic analysis, the strongest correlation with plaque rupture was vessel area. This correlated with plaque rupture more strongly than either plaque burden or location. Perhaps, as the authors suggest, greater external elastic membrane area is more predictive of plaque rupture because it incorporates the degree of plaque ...
Figure 1. Multimodal approach to atherosclerosis imaging. A representative illustration of current and emerging atherosclerosis imaging modalities. Each modality offers unique measurements of disease severity. Together, this information can be used to determine anatomic and hemodynamic consequences of atherosclerosis, complimented by detail on plaque composition, overall disease burden, and current metabolic activity acting within an individual patient. A, X-ray angiography showing multiple right coronary artery atherosclerotic lesions (arrows) resulting in significant luminal narrowing; B, virtual histology intravascular ultrasound (VH-IVUS) demonstrating coronary plaque with high content of necrotic core (red), as well as dense calcium (white) and fibro-fatty regions (dark/light green); C, Computed tomographic (CT) angiography showing noncalcified plaque in the left anterior descending artery with positive remodeling (dashed line); D, single-photon emission computed tomography (SPECT) ...
Intravascular ultrasound (IVUS) was used to visualize the extent of atherosclerotic plaques in the coronary artery lumen. Total atheroma volume (TAV) in a ≥ 40 mm segment of the targeted coronary artery was calculated as the average plaque area over the number of images that were evaluated by IVUS multiplied by the median vessel length to compensate for differences in segment length between participants.. Regression in TAV was defined as any reduction from baseline in TAV. ...
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Figure 1 Coronary Angiogram and Intravascular Ultrasound Images of the Left Coronary System. (A) Pre-procedural angiogram demonstrating a restenosed 3.5 × 15-mm Palmaz-Schatz stent (Cordis, Johnson & Johnson Company, Warren, New Jersey) (dotted line) implanted 20 years ago on the proximal LAD and a long segment of calcified disease extending from the LMS to the distal LAD, with involvement of the LAD/diagonal bifurcation (arrows). (B) Angiogram after rotational atherectomy with 1.5-mm burr and aggressive pre-dilation with 3.0- to 3.5-mm noncompliant balloons on LAD. A 2.25 × 12-mm EES in the diagonal ostium with crushed protruding EES struts (dotted line). (C) Intravascular ultrasound showing lumen area of 3.2 mm2 with a vessel diameter of 4.8 mm at the distal LMS. (D) Palmaz-Schatz stent struts (arrowheads) with evident dissection in the restenosed segment (arrows). (E) Cracked napkin-ring calcification after rotational atherectomy and pre-dilation (arrows). (F) Crushed EES struts on to the ...
IVUS imaging was performed after intracoronary administration of 0.2 mg nitroglycerin, using a motorized transducer pullback (0.5 mm/s) and a commercial scanner (Boston Scientific/SCIMED, Minneapolis, MN) consisting of a rotating 40-MHz transducer within a 3.2F imaging sheath. The decision to perform IVUS and the decision to use IVUS information to guide the percutaneous coronary intervention procedure was at the operators discretion.. All IVUS data were assessed off-line by experienced accessors unaware of the allocated stent type or clinical information in a core laboratory at the Asan Medical Center. Quantitative volumetric IVUS analysis was performed as previously described.8,9 Using computerized plannimetry (EchoPlaque 2.7, Indec Systems, Mountain View, CA), stent and reference segments were assessed every 1 mm. Reference segment external elastic membrane (EEM), lumen, and plaque+media (EEM minus lumen) areas were measured over a 5-mm length adjacent to each stent edge and averaged. ...
Microanatomy studies suggest most of penetrating arteries, which may be considered as flow dividers, arise dorsally from the upper part of MCA wall.5 In this study, plaques were observed predominantly in the ventral and inferior wall, the locations opposite to the orifices of penetrating arteries. Therefore, MCA plaque distribution appears following the same rule as coronary atherosclerosis.1 These findings are meaningful. A major concern of intracranial angioplasty has been the forceful displacement of neighboring atheromatous material into branch vessel ostia. The opposite location of most MCA plaques and penetrating artery orifices suggests that such "snow-plowing" effect in intracranial angioplasty might be uncommon. Previous studies have indicated that the incidence of side branch occlusion after MCA stenting is indeed very low.6. Our study also revealed that symptomatic MCA stenosis had more superior but less inferior plaque location than asymptomatic stenosis. The occurrence of ...
TY - JOUR. T1 - Exercise echocardiography, angioqraphy, and intracoronary ultrasound after cardiac transplantation. AU - Cohn, Joel M.. AU - Wilensky, Robert L.. AU - ODonnell, Jacqueline A.. AU - Bourdillon, Patrick D.V.. AU - Dillon, James C.. AU - Feigenbaum, Harvey. PY - 1996/6/1. Y1 - 1996/6/1. N2 - Fifty-one consecutive patients underwent exercise echocardiography, angiography, and intracoronary ultrasound (ICUS) 2.5 years (range 1 to 6) after cardiac transplantation. The average age of the donor was 29 years (range 13 to 50), and the average age of the recipient was 49 ± 12 years. In total, 78 studies were performed, as 25 patients had , 1 annual evaluation and 2 patients had 3 consecutive annual evaluations. Of the 78 angiographic studies, 40 (26 patients) had evidence of coronary artery disease, defined as a focal stenosis (,20%, n = 4) or luminal irregularities (n = 36). However, by ICUS all 51 patients had intimai thickening at some point, with 34 patients possessing diffuse disease ...
... : Coronary intravascular ultrasound (IVUS) uses small catheters with ultrasound transducers at the tip to image the coronary arteries with ultrasound from within the lumen. The special catheters can be introduced through a guide catheter into the main coronary arteries. They are then connected to the the ultrasound equipment kept in the console. Imaging is done as the catheter is pulled back and recorded. It is very useful to detect abnormalities in the vessel wall which can be missed by conventional coronary angiography. When a coronary stent has been implanted, IVUS imaging is very helpful to check whether all parts of the stent has been well apposed to the vessel wall.. ...
Intravascular Ultrasound Tools Market This report studies Intravascular Ultrasound Tools in Global market, especially in North America, Europe, China, Ja
Intravascular Ultrasound 1991 by W. J. Gussenhoven available in Trade Paperback on Powells.com, also read synopsis and reviews. The introduction of intravascular ultrasound has attracted considerable interest because it yields...
Diabetes mellitus is known as a high risk factor for ACS or coronary artery stenosis even though PR is not frequently observed in them [5, 6]. Moreover, underlying pathophysiological determinants that induce negative remodeling in diabetes remain unclear. The IR has been thought as a main cause of type 2 diabetes and MetS. Emerging evidences support a direct proatherogenic effect of IR on the coronary arteries and the advances of understanding molecular mechanisms for atherosclerosis support these findings [9, 25].. Aggravation of IR may be atherogenic via several mechanisms independent of hyperglycemia [26]. Moreover, hyperinsulinemia and IR probably have several atherogenic effects, including the promotion of inflammation and endothelial dysfunction. There are some reports that patients with hyperinsulinemia may have increased plaque vulnerability even before the onset of DM [27] and the larger visceral adipose tissue area is associated with the vulnerable characteristics of coronary plaques ...
Intravascular ultrasound techniques provide for intravascular imaging using contrast agents and nonlinear techniques. An ultrasound imaging device for detecting internal properties of a target body comprises an ultrasound transducer positioned at a distal end portion of a catheter, for transmitting excitation pulses and for receiving echo signals. A signal processor analyses echo signals at harmonics and/or subharmonics of the transmit frequency. The catheter may include a contrast agent delivery conduit extending along the catheter, the delivery conduit having an exit orifice proximal to the ultrasound transducer. The device may discriminate between echo signals respectively arising from interaction with tissue and from the interaction with contrast agent. The device may generate an image of the site of interest using non-linear components of the received ultrasound echo signals.
High-density lipoprotein cholesterol increased 5.8 mg/dl versus 1.8 mg/dl (p < 0.001), high-sensitivity C-reactive protein decreased 1.3 mg/dl versus 0.9 mg/dl (p < 0.001), and glycated hemoglobin increased 0.11% versus 0.40% (p < 0.001), respectively, for rimonabant versus control. There was no change in low-density lipoprotein cholesterol: 1.7% versus 0.44% (p = 0.78), respectively ...
Sonographic guidance for interventional procedures offers several advantages: it is less expensive, quicker, available in real time, avoids ionizing radiation, and is portable. However, a learning cur... more
Background: Despite the successful development in cardiac surgery, cerebrovascular accidents (CVA) remain a devastating complication. Aortic atherosclerosis has been identified as a major risk factor for CVA. The present thesis addresses this question in relation to aortic manipulation during cardiac surgery, being divided into a clinical (I-II) and an experimental part (III-V).. Material and methods: Consecutive cardiac surgery cases (n=2641) were analyzed. Patients with CVA were extracted from a database designed to monitor clinical symptoms. Patient records were used to confirm clinical data and diagnosis. Subdivision was made into three groups: control subjects, immediate, and delayed CVA, being analyzed for neurological symptoms (I). Patients with CVA who also had been investigated with computer tomography (CT) (n=77) were further evaluated in terms of hemispheric and vascular distribution of lesions. The CT-findings were compared with CVA symptoms (II). An aortic perfusion model was ...
Target coronary artery for IVUS must be accessible to the IVUS catheter, must not have a , 50% reduction in lumen diameter within the target segment (and at least 40 mm in length); cannot have undergone prior PCI or coronary artery bypass graft (CABG) and is not a candidate for intervention over the next 18 months. It may not be a bypass graft, bypassed vessel or culprit vessel for previous myocardial infarction (MI ...
A new study found that intravascular ultrasound (IVUS)-guided intervention in patients with chronic total occlusion (CTO) could improve outcomes compared to a conventional angiography-guided approach during percutaneous coronary intervention. The IVUS-CTO study is the first randomized trial to examine the clinical impact of IVUS guidance for CTO intervention.
OBJECTIVE: To report a novel technique of ultrasound-guided injection of autologous blood in the interprostatorectal space, in an attempt to facilitate ablative prostatic procedures by widening durably the space between the rectum and the prostate. MATERIALS AND METHODS: Between April and November 2016, four consecutive patients underwent the haemoprotection injection technique. For each patient, we recorded the time to perform the technique, the amount of injected blood, the achieved distances between the rectum and the prostate post-injection at fixed defined points (apex, middle, and base of prostate at the midline, left, and right sides of the gland), the extension of the ice ball outside the prostate capsule at those fixed points, and whether any residual blood was present on 1-month follow-up MRI ...
We appreciate the opportunity to respond to comments by Gutierrez and Elkind1 about our recent article.2 We think that they misunderstood our imaging-based methodology and would like to offer reasons that might explain their discrepant results.3. The authors assert that plaque burden should be based on intimal area when determining the remodeling threshold. Our definition has been used in other published magnetic resonance imaging and intravascular ultrasound studies that demonstrate remodeling justifiably because atherosclerotic changes can extend beyond the internal elastic lamina. Furthermore, colinearity did not influence our results as suggested by Gutierrez and Elkind1 because we defined stenosis based on lumen reduction, unlike the definition used in pathological specimen studies.3,4 About the slope of the regression line, S is simply a variable that can be negative or positive depending on whether the vessel tapers or, uncommonly, enlarges from proximal to distal locations. Others have ...
PHILADELPHIA - Not a lot of people noticed it amid all the hubbub surrounding Bill Clintons speech to the Democratic.. We performed intravascular ultrasonography in 502 patients with angiographically documented coronary disease. Patients were randomly assigned to receive moderate.. Role Reversal? Relationship Dynamics? This is a hypothetical situation. Supposing a girl gets a big job and the guy loses his and ends part time. And supposing she.. A role-reversal in t. , Psychoanalytic theorists have noted a particular dynamic in the mother-infant relationship in which the emotional needs of the mother predominate. When this situation occurs, the emotional needs of the infant may go unmet, resulting in impaired self-development.. Parent-child role-confusion, also known as role reversal or parentification, refers to a variety of ways in which a child may be pressured to assume functions in the relationship usually assumed by the parent (Boszormenyi-Nagy & Krasner, 1986; Jurkovic, 1997). Our choice ...
Dr. Barron has credentialed to undertake intravascular ultrasound studies and has a keen interest in the prevention of cardiovascular disease.
Principal Investigator:MATSUO Hirohide, Project Period (FY):1990 - 1992, Research Category:Grant-in-Aid for Developmental Scientific Research (B), Research Field:Circulatory organs internal medicine
Join Drs. Francesca Del Chicca and Myriam Baranger-Ete for a two day course on advanced abdominal ultrasound and interventional ultrasonography on 25th and 26th March 2017.. Download the course overview here.. *Location is to be confirmed*. To book, contact Dr. Myriam Baranger-Ete at [email protected] Places are limited. We look forward to seeing you there.. ...
Atherothrombosis is the major cause of morbidity and mortality worldwide. Atherosclerosis is characterized by lipid deposition (along with other in﫿am...
Your doctor has suggested you have a CT or Ultrasound Guided Thoracic/Mediastinal Biopsy as part of your evaluation at National Jewish Health.
Hi! I just had a 26 week ultrasound at 26 weeks and 3 days. My results were as follows: FW 880grams, FW% 28, BPD 62mm, FL 46mm, HC 237mm, AC 223mm, HC/AC 1.06, dont have humerus bone measurement ...
Battling cancer is hard enough. At first, my husband and I were very concerned about where we were going to receive treatment in my fight for survival. After talking with the doctor at CBC, we knew that" Read More ...
After years of turmoil, its safe to say that the relationship between mother Krystina Carrino and daughter Samantha Stamatakis was rocky. Samantha, who suffers from diabetes, was not taking her illness seriously. Indeed, she would often skip school, neglect her medicine and smoke cigarettes. But after she fell pregnant, Samanthas actions were putting not only herself in danger, but her unborn baby, too.. ...
IVUS射頻(IVUS-RF)技術分析,可以檢測脂質池容積,敏感性達到80%~90%[6],並實時提供高分辨率的斑塊圖像。血管內超聲彈性成像分析技術可以區分富含脂肪和富含纖維的組織,且彈力值動態增高可能意味著有活化的巨噬細胞[7],從而比較準確地識別出易損斑塊。VH-IVUS是近年應用於臨床的新技術,透過對射頻信號的性質進行深入分析,利用不同組織不同頻率信號回聲強度,連同採集IVUS資料的振幅,從而對斑塊進行更加準確的評估。根據冠狀動脈粥樣斑塊回聲特徵,VH-IVUS將斑塊分為4種︰(1) 軟斑塊︰脂質性斑塊,斑塊內含有較大的脂質壞死中心、較薄的纖維帽(60μm~150μm左右)、增生內膜及血管,其回聲比血管壁外膜的回聲弱,表現為極低回聲/無回聲的斑塊或典型的表面有低回聲纖維帽;(2) ...
Fig. 8. (A) Angioscopic image of the left anterior descending artery in a patient with acute MI demonstrating yellow plaque. (B,C,D) Intravascular ultrasound images as depicted in lesion A demonstrating compensatory enlargement. (B) At the defined proximal reference site the external elastic membrane (EEM) cross-sectional area (CSA) was 11.8 mm2. (C) At the culprit lesion, EEM CSA was 13.5 mm2. (D) At the distal reference site, EEM CSA was 9.6 mm2. The remodeling ratio (RR) was 1.26. (E) Angioscopic image of the left anterior descending artery in a patient with stable angina demonstrating white plaque. (F,G,H) Intravascular ultrasound images at the same lesion as E demonstrating paradoxical shrinkage. (F) At the proximal reference site, EEM CSA was 17.1 mm2. (G) At the culprit lesion EEM CSA was 10.1 mm2. (H) At the distal reference site, EEM CSA was 15.3 mm2. The RR was 0.62 (79).. Fig. 8. (A) Angioscopic image of the left anterior descending artery in a patient with acute MI demonstrating ...
TY - JOUR. T1 - Percutaneous transhepatic portography with intravascular ultrasonography for evaluation of venous involvement of hepatobiliary and pancreatic tumors. AU - Stein, Moni. AU - Schneider, Philip D. AU - Ho, Hung S. AU - Eckert, Robin. AU - Urayama, Shiro. AU - Bold, Richard J. PY - 2002. Y1 - 2002. N2 - PURPOSE: To determine the safety and utility of percutaneous transhepatic portography (PTP) with intravascular ultrasonography (IVUS) for preoperative evaluation of major spleno-mesenteric-portal venous invasion by tumors of the pancreas, porta hepatis, or liver. MATERIALS AND METHODS: This is a 2-year prospective observational study including 15 consecutive patients (five men, 10 women; mean age, 63.3 ± 10.2) with tumors of the pancreas (n = 8), liver (n = 3), or porta hepatis (n = 4) who underwent PTP/IVUS after computed tomography indicated possible tumor invasion into a major portal radical. Transhepatic portal access was created under fluoroscopic guidance with an 8-F vascular ...
TY - JOUR. T1 - Chronic Arterial Responses to Polymer-Controlled Paclitaxel-Eluting Stents. T2 - Comparison with Bare Metal Stents by Serial Intravascular Ultrasound Analyses: Data from the Randomized TAXUS-II Trial. AU - Tanabe, Kengo. AU - Serruys, Patrick W.. AU - Degertekin, Muzaffer. AU - Guagliumi, Giulio. AU - Grube, Eberhard. AU - Chan, Charles. AU - Munzel, Thomas. AU - Belardi, Jorge. AU - Ruzyllo, Witold. AU - Bilodeau, Luc. AU - Kelbaek, Henning. AU - Ormiston, John. AU - Dawkins, Keith. AU - Roy, Louis. AU - Strauss, Bradley H.. AU - Disco, Clemens. AU - Koglin, Jörg. AU - Russell, Mary E.. AU - Colombo, Antonio. PY - 2004/1/20. Y1 - 2004/1/20. N2 - Background-Polymer-controlled paclitaxel-eluting stents have shown a pronounced reduction in neointimal hyperplasia compared with bare metal stents (BMS). The aim of this substudy was to evaluate local arterial responses through the use of serial quantitative intravascular ultrasound (IVUS) analyses in the TAXUS II trial. Methods and ...
This report analyzes the worldwide markets for Intravascular Ultrasound (IVUS) in US$ Thousands by the following Product Segments: Intravascular Ultrasound
- Experimental fetal transesophageal and intracardiac echocardiography utilizing intravascular ultrasound technology. - Swissfetus