Angioplasty, Balloon, Laser-Assisted
Techniques using laser energy in combination with a balloon catheter to perform angioplasty. These procedures can take several forms including: 1, laser fiber delivering the energy while the inflated balloon centers the fiber and occludes the blood flow; 2, balloon angioplasty immediately following laser angioplasty; or 3, laser energy transmitted through angioplasty balloons that contain an internal fiber.
Coronary Artery Disease
Fiber Optic Technology
Reproducibility of Results
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).
A calcium salt that is used for a variety of purposes including: building materials, as a desiccant, in dentistry as an impression material, cast, or die, and in medicine for immobilizing casts and as a tablet excipient. It exists in various forms and states of hydration. Plaster of Paris is a mixture of powdered and heat-treated gypsum.
Endovascular procedure in which atheromatous plaque is excised by a cutting or rotating catheter. It differs from balloon and laser angioplasty procedures which enlarge vessels by dilation but frequently do not remove much plaque. If the plaque is removed by surgical excision under general anesthesia rather than by an endovascular procedure through a catheter, it is called ENDARTERECTOMY.
Drug Delivery Systems
Radiology Information Systems
An island in the Greater Antilles in the West Indies. Its capital is San Juan. It is a self-governing commonwealth in union with the United States. It was discovered by Columbus in 1493 but no colonization was attempted until 1508. It belonged to Spain until ceded to the United States in 1898. It became a commonwealth with autonomy in internal affairs in 1952. Columbus named the island San Juan for St. John's Day, the Monday he arrived, and the bay Puerto Rico, rich harbor. The island became Puerto Rico officially in 1932. (From Webster's New Geographical Dictionary, 1988, p987 & Room, Brewer's Dictionary of Names, 1992, p436)
X-Ray Absorption Spectroscopy
The electronic transmission of radiological images from one location to another for the purposes of interpretation and/or consultation. Users in different locations may simultaneously view images with greater access to secondary consultations and improved continuing education. (From American College of Radiology, ACR Standard for Teleradiology, 1994, p3)
Computer Communication Networks
Mitral Valve Annuloplasty
Mitral Valve Insufficiency
Atmosphere Exposure Chambers
Diagnostic and therapeutic procedures that are invasive or surgical in nature, and require the expertise of a specially trained radiologist. In general, they are more invasive than diagnostic imaging but less invasive than major surgery. They often involve catheterization, fluoroscopy, or computed tomography. Some examples include percutaneous transhepatic cholangiography, percutaneous transthoracic biopsy, balloon angioplasty, and arterial embolization.
A policy of quality control assessment helps to reduce the risk of intraoperative stroke during carotid endarterectomy. (1/180)OBJECTIVES: A pilot study in our unit suggested that a combination of transcranial Doppler (TCD) plus completion angioscopy reduced incidence of intra-operative stroke (i.e. patients recovering from anaesthesia with a new deficit) during carotid endarterectomy (CEA). The aim of the current study was to see whether routine implementation of this policy was both feasible and associated with a continued reduction in the rate of intraoperative stroke (IOS). MATERIALS AND METHODS: Prospective study in 252 consecutive patients undergoing carotid endarterectomy between March 1995 and December 1996. RESULTS: Continuous TCD monitoring was possible in 229 patients (91%), while 238 patients (94%) underwent angioscopic examination. Overall, angioscopy identified an intimal flap requiring correction in six patients (2.5%), whilst intraluminal thrombus was removed in a further six patients (2.5%). No patient in this series recovered from anaesthesia with an IOS, but the rate of postoperative stroke was 2.8%. CONCLUSIONS: Our policy of TCD plus angioscopy has continued to contribute towards a sustained reduction in the risk of IOS following CEA, but requires access to reliable equipment and technical support. However, a policy of intraoperative quality control assessment may not necessarily alter the rate of postoperative stroke. (+info)
Intraoperative assessment of technical perfection in carotid endarterectomy: a prospective analysis of 1305 completion procedures. Collaborators of the EVEREST study group. Eversion versus standard carotid endartectomy. (2/180)OBJECTIVE: to define the incidence of technical defects and the impact of technical errors on ipsilateral carotid occlusion, ipsilateral stroke, and early restenosis rates, we analysed 1305 patients undergoing carotid completion procedures. DESIGN: prospective multicentre study. PATIENTS AND METHODS: adequacy of CEA was assessed intraoperatively by angiography in 1004 (77%), by angioscopy in 299 (22%), and by duplex scan in two patients (1%). Arteriograms and angioscopic findings were interpreted at the time of the procedure by the operating surgeon, who also established the need for immediate surgical revision. RESULTS: perioperatively, 13 major strokes (0.9%, all ipsilateral) and six deaths (0.4%) were recorded. Overall, 112 defects (9%) were identified intraoperatively: 81 (72%) were located in the common carotid artery (CCA) or internal carotid artery (ICA), and 31 (28%) in the external carotid artery. In 48 patients (4%) the defects were revised. Logistic regression analysis revealed that carotid plaque extension >2 cm on the ICA was a positive independent predictor of CEA defects (odds ratio (OR) 1.5p=0.03). A significant association was found between the incidence of revised defects of the CCA and ICA and perioperative ipsilateral stroke (OR 11.5p=0.0002). In contrast, patients with minor non-revised defects had an ipsilateral stroke rate comparable to that of patients with no defects (p=0.4). No significant association was found between revised or non-revised defects and occurrence of restenosis/occlusion at 6-month follow-up. CONCLUSIONS: the incidence of major technical defects during CEA is low, yet the perioperative neurological prognosis of patients with major defects warranting revision is poor. Completion angiography or angioscopy and possible correction of defects did not protect per se from an unfavourable early outcome after CEA. Therefore, surgical excellence is mandatory to achieve satisfactory results after CEA. (+info)
Valvulotomy of non-reversed saphenous vein bypass grafts: a randomised, blinded, angioscopy-controlled study. (3/180)OBJECTIVES: to compare the result of vein valve disruption with two different valvulotomes during non-reversed saphenous vein bypass. DESIGN: a randomised, blinded clinical study. MATERIALS AND METHODS: twenty patients undergoing femorodistal non-reversed saphenous vein arterial bypass were randomised into two equal groups. Valve leaflet disruption was performed either with a standard size plastic valvulotome or with a metal valvulotome with an exchangeable cutting head. Valvulotomy was done after full exposure of the vein and completion of the proximal anastomosis. The result was evaluated by a surgeon blinded to the valvulotome used, using angioscopy. RESULTS: a total of 219 valve cusps were inspected with angioscopy. There were 83 completely lysed cusps (69%) by plastic and 76 (78%) by metallic valvulotomes (p=0.14). Of all the incompletely lysed cusps 12 (29%) occurred in the most proximal valve pocket treated with valvulotomy. CONCLUSIONS: no significant difference in performance between the investigated valvulotomes was found. Incomplete valvulotomy occurred mainly in the proximal part of the vein and was obviously caused by a size mismatch between the diameter of vein and the valvulotome. Construction of a valvulotome with a variable diameter cutting head is therefore recommended. (+info)
Evaluation of disinfection and sterilization of reusable angioscopes with the duck hepatitis B model. (4/180)PURPOSE: Nosocomial transmission of viral hepatitis and retrovirus infection has been reported. The expected risk is greatest for the hepatitis B virus (HBV). The duck HBV (DHBV) has similar biologic and structural characteristics to HBV and has been adopted as a suitable model for disinfectant testing. METHODS: Angioscopic examination of the external jugular vein was performed on DHBV-infected ducks. After use, the instrument was air dried for 3 minutes. Samples were obtained by flushing the channel with 5 mL of phosphate buffered saline solution. The samples were collected immediately after drying (control), after flushing with 5 mL of water, after glutaraldehyde disinfection for 5, 10, and 20 minutes, and after ethylene oxide gas sterilization. Angioscopes were either precleaned or uncleaned before disinfection/sterilization. Residual infectivity was assessed with inoculation of samples into the peritoneal cavity of day-old ducks (n = 231). RESULTS: DNA analysis results of liver samples showed that all 38 control ducks became infected. The frequency of DHBV infection was reduced to 93% (14 of 15) by flushing the angioscope with 5 mL of sterile water. No transmission occurred after the use of any of the properly precleaned and disinfected/sterilized angioscopes. However, after the use of the uncleaned angioscopes, the transmission rate was 90% (9 of 10) and 70% (7 of 10) after 5 and 10 minutes of contact time, respectively, in 2% glutaraldehyde. Even after the recommended 20 minutes of contact time, there was still 6% (2 of 35) transmission. After ethylene oxide sterilization, two of the recipient ducklings (2 of 35) were infected with DHBV. CONCLUSION: There was no disease transmission after reuse of disposable angioscopes adequately cleaned before disinfection or sterilization. However, if the angioscopes are inadequately cleaned, DHBV can survive despite glutaraldehyde disinfection or ethylene oxide sterilization. This contrasts with previous in vitro and in vivo data with solid surgical instruments. It is postulated that the presence of a narrow lumen or residual protein shielding within the lumen may compromise effective inactivation of hepadnaviruses on angioscopes, with the potential risk for patient-to-patient transmission. (+info)
Stent attachment site-related endoleakage after stent graft treatment: An in vitro study of the effects of graft size, stent type, and atherosclerotic wall changes. (5/180)OBJECTIVE: Perigraft endoleakage is a major complication of the endovascular treatment of abdominal aortic aneurysms. The factors that cause this form of endoleakage are not completely identified. The effect of sizing of the prosthesis in combination with either self-expandable or balloon-expandable stents is evaluated in this study. Further, the influence of atherosclerotic changes on endoleakage is evaluated. METHODS: Eight human abdominal aortas were assessed macroscopically at 11 sites for the presence of atherosclerotic changes with intravascular ultrasound scanning (IVUS) and with computed tomography (CT). Five aortas were placed in in vitro circulation with physiologic parameters. After the determination of the proximal and distal landing site of the stent graft, the diameter and surface measurements of the cross sections were taken. The stent graft diameters were chosen from 4-mm undersizing to 6-mm oversizing, both for Gianturco stent grafts (William Cook Europe A/S, Bjaeverskov, Denmark) and for Palmaz stent grafts (Cordis/Johnson & Johnston Co, Warren, NJ). After placement of the stent graft, the diameter and surface measurements of the aortic cross section were determined at the proximal and distal stent attachment sites. The presence and size of the folds at the stent attachment site and the interface with the aortic wall were determined with IVUS and angioscopy. Endoleakage was evaluated with angiography. After angioplasty of the stent attachment site, IVUS, angioscopy, and angiography were repeated. RESULTS: Regarding atherosclerotic changes of the aortic wall, the correlations between clinical impression and CT, clinical impression and IVUS, and CT and IVUS were high (r = 0.77, r = 0.79 and r = 0.79, respectively). For the Gianturco stent grafts, no significant relationship existed between the diameters measured before and after stent graft placement, leading to great differences in intended and achieved oversizing. The achieved oversizing was less in the case of minimal atherosclerotic changes of the aortic wall. The Gianturco stent graft followed the aortic wall closely during the heart cycle. The sizes of the folds of the fabric were clearly correlated with the achieved oversizing (r = 0.83; P =.04) and the grade of endoleakage (r = 0.88; P =.022). Angioplasty after stent graft placement had no effect on the diameter and the grade of endoleakage. Palmaz stent grafts did not follow the aortic wall during the heart cycle. A significant correlation existed between oversizing and both space between aortic wall and stent graft (r = -0.88; P =.02) and grade of endoleakage (r = 0.84; P =.036). Grade of endoleakage in the Palmaz stent graft group was less than in the Gianturco stent graft group. CONCLUSION: With the use of Gianturco stents, a great difference between intended and achieved oversizing is accomplished. The atherosclerotic changes of the aortic wall possibly affect this finding. The configuration of the Gianturco stent results in the formation of fold in the case of oversizing, which is associated with endoleakage. However, the self-expandable character of the stent leads to a close relation to the aortic wall during the heart cycle, and this may possibly accommodate future aortic neck dilation. The Palmaz stent grafts do not follow the aortic wall during the heart cycle, but they do lead to better interface between the graft and the aortic wall, which results in less endoleakage. (+info)
The use of arm vein in lower-extremity revascularization: results of 520 procedures performed in eight years. (6/180)PURPOSE: The absence of an adequate ipsilateral saphenous vein in patients requiring lower-extremity revascularization poses a difficult clinical dilemma. This study examined the results of the use of autogenous arm vein bypass grafts in these patients. METHODS: Five hundred twenty lower-extremity revascularization procedures performed between 1990 and 1998 were followed prospectively with a computerized vascular registry. The arm vein conduit was prepared by using intraoperative angioscopy for valve lysis and identification of luminal abnormalities in 44.8% of cases. RESULTS: Seventy-two (13. 8%) femoropopliteal, 174 (33.5%) femorotibial, 29 (5.6%) femoropedal, 101 (19.4%) popliteo-tibial/pedal, and 144 (27.7%) extension "jump" graft bypass procedures were performed for limb salvage (98.2%) or disabling claudication (1.8%). The average age of patients was 68.5 years (range, 32 to 91 years); 63.1% of patients were men, and 36.9% of patients were women. Eighty-five percent of patients had diabetes mellitus, and 77% of patients had a recent history of smoking. The grafts were composed of a single arm vein segment in 363 cases (69. 8%) and of spliced composite vein with venovenostomy in 157 cases (30.2%). The mean follow-up period was 24.9 months (range, 1 month to 7.4 years). Overall patency and limb salvage rates for all graft types were: primary patency, 30-day = 97.0% +/- 0.7%, 1-year = 80.2% +/- 2.1%, 3-year = 68.9% +/- 3.6%, 5-year = 54.5% +/- 6.6%; secondary patency, 30-day = 97.0% +/- 0.7%, 1-year = 80.7% +/- 2.1%, 3-year = 70.3% +/- 3.4%, 5-year = 57.5% +/- 6.2%; limb salvage, 30-day = 97.6% +/- 0.7%, 1-year = 89.8% +/- 1.7%, 3-year = 82.1% +/- 3.3%, 5-year = 71.5% +/- 6.9%. Secondary patency and limb salvage rates were greatest at 5 years for femoropopliteal grafts (69.8% +/- 12.8%, 80.7% +/- 11.8%), as compared with femorotibial (59.6% +/- 10. 3%, 72.7% +/- 10.5%), femoropedal (54.9% +/- 25.7%, 56.8% +/- 26.9%, ) and popliteo-tibial/pedal grafts (39.0% +/- 7.3%, 47.6% +/- 15.4%). The patency rate of composite vein grafts was equal to that of single-vein conduits. The overall survival rate was 54% at 4 years. CONCLUSION: Autogenous arm vein has been used successfully in a wide variety of lower-extremity revascularization procedures and has achieved excellent long- and short-term patency and limb salvage rates, higher than those generally reported for prosthetic or cryopreserved grafts. Its durability and easy accessibility make it an alternative conduit of choice when an adequate saphenous vein is not available. (+info)
Endovascular-assisted versus conventional in situ saphenous vein bypass grafting: cumulative patency, limb salvage, and cost results in a 39-month multicenter study. (7/180)OBJECTIVE: In this retrospective multicenter study, the results of a minimally invasive method of endovascular-assisted in situ bypass grafting (EISB) versus "open" conventional in situ bypass grafting (CISB) were evaluated with a comparison of primary and secondary patency, limb salvage, and cost. METHODS: Enrolled in this study were 273 patients: 117 underwent CISB (42 femoropopliteal, 75 femorocrural) and 156 underwent EISB (41 femoropopliteal, 115 femorocrural). EISB was performed with an angioscopic Side Branch Occlusion system and an angioscopically guided valvulotome. All the patients underwent follow-up examination with serial color-flow ultrasound scanning. RESULTS: Both groups had similar comorbid risk factors for diabetes mellitus, coronary artery heart disease, hypertension, and cigarette smoking. The primary patency rates (CISB, 78.2% +/- 5% [SE]; EISB, 70.5% +/- 5%; P =.156), the secondary patency rates (CISB, 84.1% +/- 4%; EISB, 82.9% +/- 5%; P =.26), and the limb salvage rates (CISB, 85.8%; EISB, 88.4%; P =.127) were statistically similar, with a follow-up period that extended to 39 months (mean, 16.6 months; range, 1 to 40 months). In veins that were less than 2.5 to 3.0 mm in diameter, the EISB grafts fared poorly, with an increased incidence of early (12-month) graft thromboses (CISB, 10 grafts, 8.5%; EISB, 24 grafts, 15.3%). However, wound complications (CISB, 23%; EISB, 4%; P =.003), mean hospital length of stay (CISB, 6.5 days +/- 4.83; EISB, 3.2 days +/- 3.19; P =.001), and mean hospital charges (CISB, $25,349 +/- $19,476; EISB, $18,096 +/- $14,573; P =.001) were all significantly reduced in the EISB group. CONCLUSION: The CISB and EISB midterm primary and secondary patency and limb salvage rates were statistically similar. In smaller veins (< 2.5 to 3.0 mm in diameter), however, EISB is not appropriate because overly aggressive instrumentation may cause intimal trauma, with resultant early graft failure. With the avoidance of a long leg incision in the EISB group, wound complications and hospital length of stay were significantly reduced, which lowered hospital charges and justified the additional cost of the endovascular instruments. When in situ bypass grafting is contemplated, EISB in appropriate patients is a safe, minimally invasive, and cost-effective alternative to CISB. (+info)
Minimally invasive approach for aortic arch branch vessel reconstruction. (8/180)Minimally invasive aortic arch branch vessel reconstruction was successfully accomplished in four patients over the past 3 years. There were no operative complications. Three patients had an uneventful hospital course, ranging from 3 to 5 days. The fourth patient with multiple medical problems and severe peripheral vascular disease had a prolonged hospital course for reasons unrelated to the surgical procedure. This minimally invasive surgical exposure can be used to effectively and safely repair innominate and left common carotid artery lesions. (+info)
CiNii Articles - Serial Coronary Angioscopic Observations afrer Palmaz-Schatz Coronary Stent Implantation
冠動脈内視鏡法によるPalmaz-Schatzステント植込み後の内膜表面変化 : 経時的観察の検討 [in Japanese] Serial Coronary Angioscopic Observations afrer Palmaz-Schatz Coronary Stent Implantation [in Japanese] ...
Vascular Thrombosis - Myocardial Infarction - 78 Steps Health Journal
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 ...
1994 - Angioscopy was more sensitive than angiography for intracoronary thrombus | 1995 Mar-Apr : Volume 122, Number 2, Page 45...
The study by den Heijer and colleagues is of interest to both interventional cardiologists and internists. The availability of low-profile, flexible, and steerable angioscopic systems has allowed the routine percutaneous application of this technology. Interpretable images can now be obtained in most patients having interventional procedures, although the technique still has important limitations. Problems remain with aiming the angioscope, and a clear imaging field cannot always be obtained. The widespread availability of second-generation interventional technologies, including stents, atherectomy catheters, and local drug delivery systems, give the interventionist a choice of therapies. Precise knowledge of coronary morphology may have an important effect on the decision of which technique to use to treat a given lesion. The study by den Heijer and colleagues suggests that, in a few patients, the angioscopic information was useful to the clinician. These results, however, cannot be ...
RePub, Erasmus University Repository: Chromatic distortion during angioscopy: assessment and correction by quantitative...
Angioscopy represents a diagnostic tool with the unique ability of assessing the true color of intravascular structures. Current angioscopic interpretation is entirely subjective, however, and the visual interpretation of color has been shown to be marginal at best. The quantitative colorimetric angioscopic analysis system permits the full characterization of angioscopic color using two parameters (C1 and C2), derived from a custom color coordinate system, that are independent of illuminating light intensity. Measurement variability was found to be low (coefficient of variation = 0.06-0.64%), and relatively stable colorimetric values were obtained even at the extremes of illumination power. Variability between different angioscopic catheters was good (maximum difference for C1, 0.022; for C2, 0.015). Catheter flexion did not significantly distort color transmission. Although the fiber optic illumination bundle was found to impart a slight yellow tint to objects in view (deltaC1 = 0.020, deltaC2 ...
Abstract 2777: Optimal Expansion of the Stent is a Major Contributor to the Neointimal Coverage Following Sirolimus-eluting...
Background: Although sirolimus-eluting stent (SES) has significantly reduced in-stent restenosis by inhibiting neointimal hyperplasia, insufficient neointimal coverage after stenting may result in adverse outcomes. Determinants of neointimal coverage following SES, however, are poorly understood.. Methods: We evaluated 28 SES lesions using both angioscopy and intravascular ultrasound (IVUS). Degree of neointimal coverage was judged by angioscopy at follow-up (11 ± 6 months): complete/incomplete coverage, based on whether the stent struts were embedded by the neointima. Minimal stent area (MSA), external elastic membrane (EEM), lumen cross-sectional area (CSA) and plaque burden (EEM minus lumen/EEM CSA) were measured by IVUS at stent implantation. Both proximal and distal references were used. Stent expansion was assessed by stent expansion index (SEI) as MSA/reference EEM CSA. Under-expansion was defined as SEI , 0.4. Incomplete apposition was defined as the lack of contact between any strut ...
Near-infrared hyperspectral imaging of atherosclerotic plaque in WHHLMI rabbit artery | (2013) | Ishii | Publications | Spie
Hyperspectral imaging (HSI) of rabbit atherosclerotic plaque in near-infrared (NIR) range from 1150 to 2400 nm was demonstrated. A method to identify vulnerable plaques that are likely to cause acute coronary events has been required. The object of this study is identifying vulnerable plaques by NIR-HSI for an angioscopic application. In this study, we observed the hyperspectral images of the atherosclerotic plaque in WHHLMI rabbit (atherosclerotic rabbit) artery under simulated angioscopic conditions by NIR-HSI. NIR-HSI system was constructed by a NIR super continuum light and a mercury-cadmium-telluride camera. Spectral absorbance values (log (1/R) data) were obtained in the wavelength range from 1150 to 2400 nm at 10 nm intervals. The hyperspectral images were constructed with spectral angle mapper algorithm. As a result, the detections of atherosclerotic plaque under angioscopic observation conditions were achieved especially in the wavelength around 1200 nm, which corresponds to the second ...
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YELLOW II Study: Reduction in Coronary Yellow Plaque, Lipids and Vascular Inflammation by Aggressive Lipid Lowering - No Study...
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details ...
Fluorescein disodium salt dihydrate - Contrast Media, ATC:S01JA01
For diagnostic imaging. Primarily indicated in diagnostic fluorescein angiography or angioscopy of the fundus and of the iris vasculature ...
Identifying cell-enhancement strategies, be it genetic modification (1) or small molecule antagonism (2), is essential to improve the therapeutic efficacy of cell-based therapies. Indeed, transplanted cells in a wide variety of models demonstrate poor engraftment, with high rates of cell attrition. Herein, we highlight important differences in GSK3β signaling as a factor for enhanced EPC senescence in DM resulting in accelerated rates of apoptosis. Moreover, using a proteomics approach, we identified upregulation of cathB as protective for reductions in basal and stress-induced apoptosis. Finally, in a xenotransplant model, we confirm that cathB activity is required for GSKi-induced improvements in EPC mediated arterial repair.. Patients with DM have increased rates of cardiovascular disease and markedly higher rates of in-stent restenosis after revascularization. This, in part, is owing to attenuated EPC function in patients and fewer circulating cells (16). Multiple mechanisms of EPC ...
Evaluation of thrombus removal by transluminal extraction coronary atherectomy by percutaneous coronary angioscopy<...
TY - JOUR. T1 - Evaluation of thrombus removal by transluminal extraction coronary atherectomy by percutaneous coronary angioscopy. AU - Annex, Brian H.. AU - Larkin, Timothy J.. AU - ONeill, William W.. AU - Safian, Robert D.. PY - 1994/9/15. Y1 - 1994/9/15. N2 - Coronary angioscopy was superior to angiography for evaluating the efficacy of thrombus removal after TEC. In patients with acute ischemic syndromes, TEC was effective in removing intraluminal thrombus.. AB - Coronary angioscopy was superior to angiography for evaluating the efficacy of thrombus removal after TEC. In patients with acute ischemic syndromes, TEC was effective in removing intraluminal thrombus.. UR - http://www.scopus.com/inward/record.url?scp=0027971027&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=0027971027&partnerID=8YFLogxK. U2 - 10.1016/0002-9149(94)90753-6. DO - 10.1016/0002-9149(94)90753-6. M3 - Article. C2 - 8074047. AN - SCOPUS:0027971027. VL - 74. SP - 606. EP - 609. JO - American ...
IMCD and BD plugs: Do they have a role in stone formation? | Kidney Stone Evaluation And Treatment Program
Figure 3.. Endoscopic view of renal papilla from stone forming phenotypes with BD plugs, yellow plaque and attached stones to Randalls plaque. Panel A shows extensive regions of yellow plaque in IMCD (arrows) and a single site of Randalls plaque (double arrow) of a brushite patient. Panel B shows modest changes in a papilla from an ileostomy patient including dilated BD (asterisk), yellow plaque (arrowhead) and white plaque (arrow). Patients with small bowel resection (panel C) show attached stones (double arrows) in a region of white (arrows) and yellow (arrowheads) plaque. Patients with hyperparathyroidism (panel D) also have attached stones (within white box and insert) is magnified in the insert at the upper right; the stone is outlined within the insert by a black dotted overlay and the plaque border is indicated with an arrow. Areas of yellow (double arrows), white (single arrowhead) plaque and BD plug (single arrow) are seen on one papillum.. Histopathologic observations: The primary ...
Abstract 4913: Difference of not only Magnitude but also Heterogeneity of Neointimal Coverage between Drug-Eluting Stent and...
Drug-eluting stent (DES) achieved significant reduced restenosis, however the safety of efficacy of DES in acute myocardial infarction (AMI) are still controversial. In this study, we compared angioscopic parameters between DES and bare metal stent (BMS) in patients with AMI. Eighty-seven consecutive patients who received DES or BMS for AMI were enrolled. At 6-month after AMI, coronary angiography was performed in all patients. We performed coronay angioscope (CAS) if the patients did not show significant in-stent restenosis (,50% stenosis). Using CAS, we evaluated the maximum and minimum grade of neointimal coverage within one stent using the following CAS score: 0: stent struts were exposed similary to right implantaiton, 1: stent were covered by very thin neointima, 2: struts were embedded but visible and 3: struts were fully embedded and invisible. We adopted minimium grade as the magnitude of neointimal coverage and calculated heterogeneity score as the following formula: (maximum grade) ...
Yellow colour discharge during pregnancy - Pregnancy Blog
Plan for good things to occur and get a pleasant payoff when they do. My diet is very lean and I like I said do lots of free yelow training which should help reduce my chest size. An infection can result in health issues throughout being pregnant, including dehydration and bacteremia (micro organism within the blood) yelloow can result in meningitis. In terms of having dischargs baby, you will definitely have a gender presence. Your babys heart beats about 105 times a minute. Constipation is one of the most common concerns during pregnancy and kiwi can help in preventing its occurrence. Within 6-10 days of conception, yellow colour discharge during pregnancy embryo attaches co,our to inside the walls of the uterus. Science tells us you also look more attractive to your partner when youre ovulating. If the result yellow colour discharge during pregnancy eischarge, but the woman has the signs and symptoms of pregnancy, she should test again after 1 week or ask a doctor about a blood test ...
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Intravascular ultrasound guidance for catheter-based coronary interventions | JACC: Journal of the American College of...
Intravascular ultrasound is a new method for visualizing the details of vascular pathology, providing high resolution images of plaque and thrombus. This review summarizes the potential applications of ultrasound imaging in the guidance of balloon angioplasty, atherectomy, laser ablation and stenting. Ultrasound differs from angiography and angioscopy in its ability to penetrate below the surface of the vessel lumen, demonstrating specific aspects about the distribution and composition of plaque. Because the different layers of the arterial wall have different acoustic properties, ultrasound catheters are able to define the layers of normal wall in comparison with plaque. Particularly in combination with therapeutic techniques designed to remove or ablate plaque, ultrasound may prove useful in maximizing the amount of plaque treated and minimising trauma to normal vessel wall components. Combined imaging/therapeutic devices are in the pilot phase of development and show promise for enhancing the ...
Powerquest, 2000, Yellow Color Boat Gel Coat Gallon - Spectrum Color F505946G - iboats.com
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When i drink something i have to go to the bathroom immediately & having yellow color in corners of eyes. What could be these...
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Late and sudden thrombotic coronary occlusion after percutaneous coronary interventions was first noted as a significant problem 2 to 15 months after brachytherapy (22). In contrast, meta-analyses of initial long-term outcomes after sirolimus-eluting (10,23) or paclitaxel-eluting stent implantation (12) pointed to the overall benefit of DES compared with BMS in selected patient groups and suggested no increased hazard of stent thrombosis compared with BMS use. However, there were case reports (8,16) demonstrating the occurrence of late stent thrombosis after DES implantation associated with a high risk of death or nonfatal MI. Reasons for thrombotic events were described in experimental (24) and autopsy studies (25): DES may delay endothelialization and impair intimal healing, partly in association with hypersensitivity and inflammatory reactions, and thereby extend the time window during which stents are prone to thrombosis (8). This has been confirmed recently by angioscopic findings (26). Two ...
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The extent of luminal narrowing varies with underlying plaque morphology. TCFAs and fibroatheromas have the least luminal narrowing while lesions with acute plaque rupture, haemorrhage, or healed repair sites show the most stenosis. Over 74% of TCFAs have , 75% cross sectional area luminal narrowing (equivalent to , 50% diameter stenosis). Healed and acute plaque ruptures show the greatest luminal narrowing with 46% and 43%, respectively, containing , 75% cross sectional area narrowing. In contrast, only 26% of TCFAs show severe luminal narrowing (fig 3B). In a population where sudden cardiac death is the first manifestation of coronary disease, these morphologic findings strongly suggest that TCFAs are precursors to acute ruptures and healed plaque ruptures are often clinically silent.. TCFAs with ⩽ 50% diameter stenosis may be the ideal candidate lesions one should first attempt to identify and treat as a measure to reduce the incidence of myocardial infarction in high risk patients. If a ...
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Purpose: : To evaluate the clinical, histopathologic and genetic features of retinoblastoma (RB) in children over age 5 years. Methods: : Of 90 consecutive patients with RB who presented to the Retina Service at the Massachusetts Eye and Ear Infirmary, 6 patients (6.7%) had initial diagnosis after age 5 years. 4 had active tumors (4.4% of all cases) and 2 had inactive tumors (retinoma). Genetic testing for RB1 mutations was performed on constitutional and tumor DNA in 2 cases. Results: : There were 2 boys and 2 girls, all unilateral with no family history, ranging in age from 6 to 11 years (mean 8 years). 3 (2 girls, 1 boy) with unilateral decrease in vision (1 symptomatic, 2 by vision screen), total retinal detachment (RD) with vascular dilatation and telangiectasia were referred with diagnosis of Coats disease. 2 had RD in contact with the lens and third had tumor spherules in the vitreous. White plaques or tumors with dilated vessels that dive or arise from them were seen. Ultrasound (US) and ...
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The researchers believe that it might ultimately be possible to forestall or even prevent the development of atherosclerosis by injecting these cells into patients, or to induce the patients own stem cells to differentiate into progenitor cells capable of arterial repair.. Our studies indicate that the inability of bone marrow to produce progenitor cells which repair and rejuvenate the lining of the arteries drives the process of atherosclerosis and the formation of plaques in the arteries, said Duke cardiologist Pascal Goldschmidt, M.D., chairman of the Department of Medicine. For a long time weve known that aging is an important risk factor for coronary artery disease, and weve also known that this disease can be triggered by smoking, bad diet, diabetes, high blood pressure and other factors.. But if you compare someone who is over 60 with someone who is 20 with the same risk factors, there is obviously something else going on as well, he continued. The possibility that stem cells may ...
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Vanguard is well known for pioneering index funds, and index investing remains a vital part of Vanguards business strategy. However, the fund family also has a number of actively managed funds that seek to outperform their benchmarks, rather than simply match them.. However, when a fund fails to beat its benchmark and instead tends to see its returns align closely to broad market averages, investors have to ask themselves whether the returns warrant the higher expenses associated with actively managed funds. Vanguards Growth Equity fund is an example of this phenomenon; despite a relatively high (for Vanguard) expense ratio of 0.72%, the fund has fallen in the bottom 20% of its fund category over long periods of time. If youre paying more and not getting better performance, you may be better off sticking with one of Vanguards index funds.. A similar pattern exists with some special classes of funds. For instance, the Fidelity Advisor fund mentioned above looks pretty similar to another fund ...
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angioscopy. *endocoronary ultrasound. *coronary angiography. *magnetic resonance imaging (MRI). Postmortem examiners may ...
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AS = Angioscopy. *BI = Biomagnetic Imaging. *CD = Color Flow Doppler. *CF = Cinefluorography (retired) ...
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He is the first cardiologist in the region to perform an angioscopy and directional atherectomy. He is reported to be the first ... Atherectomy Drug Eluting Stents Ventricular assist device Angioscopy Embolectomy Transmyocardial revascularization India portal ...
1991 Gershman, A., Chandra, M., Daykhovsky, L., Grundfest, W. Technical Parameters For Angioscopy: Critical Elements For ...
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... serial observations by coronary angioscopy". Am. Heart J. 161 (6): 1200-6. doi:10.1016/j.ahj.2011.03.006. PMID 21641369. Hwang ...
... for detecting myocardial infarction Angioscopy using a flexible fiberoptic catheter inserted directly into an artery. ...
Visible light imaging
... angioscopy arthroscopy bronchoscopy colposcopy cystoscopy fetoscopy hysteroscopy gastrointestinal endoscopy including ...
James S. Forrester (cardiologist)
Forrester led a team that developed coronary angioscopy, a method for seeing inside a living patient's coronary arteries using ...
List of MeSH codes (E04)
... angioscopy MeSH E04.100.814.143 - arteriovenous shunt, surgical MeSH E04.100.814.200 - blood vessel prosthesis implantation ... angioscopy MeSH E04.800.250.070 - arthroscopy MeSH E04.800.250.100 - bronchoscopy MeSH E04.800.250.150 - colposcopy MeSH ...
List of MeSH codes (E01)
... angioscopy MeSH E01.370.370.120 - blood circulation time MeSH E01.370.370.130 - blood flow velocity MeSH E01.370.370.140 - ... angioscopy MeSH E01.370.388.250.070 - arthroscopy MeSH E01.370.388.250.100 - bronchoscopy MeSH E01.370.388.250.150 - colposcopy ... microscopic angioscopy MeSH E01.370.370.610 - plethysmography MeSH E01.370.370.610.600 - photoplethysmography MeSH E01.370. ...
ICD-9-CM Volume 3
Fluorescein angiography or angioscopy of eye (95.13) Ultrasound study of eye (95.14) X-ray study of eye (95.15) Ocular motility ...
Coronary artery angioscopy, which first was used to reveal the presence of a blood clot in the coronary arteries of patients ... Angioscopy is a medical technique for visualizing the interior of blood vessels. In this technique, a flexible fibre bundle ... It can be helpful in diagnosing (e.g., arterial embolism). Angioscopy is also used as an adjunctive procedure during vascular ... The instrument used to perform angioscopy is called as angioscope. Scanning Fiber Endoscope (SFE) is an emerging technology ...
... is a common medical procedure in which an instrument called a proctoscope (also known as a rectoscope, although the latter may be a bit longer) is used to examine the anal cavity, rectum, or sigmoid colon. A proctoscope is a short, straight, rigid, hollow metal tube, and usually has a small light bulb mounted at the end. It is approximately 5 inches or 15 cm long, while a rectoscope is approximately 10 inches or 25 cm long. During proctoscopy, the proctoscope is lubricated and inserted into the rectum, and then the obturator is removed, allowing an unobstructed view of the interior of the rectal cavity. This procedure is normally done to inspect for hemorrhoids or rectal polyps and might be mildly uncomfortable as the proctoscope is inserted further into the rectum. Modern fibre-optic proctoscopes allow more extensive observation with less discomfort. ...
Continuous hemofiltration (CHF) was first described in a 1977 paper by Kramer et al. as a treatment for fluid overload. Hemofiltration is most commonly used in an intensive care unit setting, where it is either given as 8- to 12-hour treatments, so called SLEF (slow extended hemofiltration), or as CHF (continuous hemofiltration), also sometimes called continuous veno-venous hemofiltration (CVVH) or continuous renal replacement therapy (CRRT). Hemodiafiltration (SLED-F or CHDF or CVVHDF) also is widely used in this fashion. In the United States, the substitution fluid used in CHF or CHDF is commercially prepared, prepackaged, and sterile (or sometimes is prepared in the local hospital pharmacy), avoiding regulatory issues of on-line creation of replacement fluid from dialysis solution. With slow continuous therapies, the blood flow rates are usually in the range of 100-200 ml/min, and access is usually achieved through a central venous catheter placed in one of the large central veins. ...
After completion of surgery, the patient is transferred to the post anesthesia care unit and closely monitored. When the patient is judged to have recovered from the anesthesia, he/she is either transferred to a surgical ward elsewhere in the hospital or discharged home. During the post-operative period, the patient's general function is assessed, the outcome of the procedure is assessed, and the surgical site is checked for signs of infection. There are several risk factors associated with postoperative complications, such as immune deficiency and obesity. Obesity has long been considered a risk factor for adverse post-surgical outcomes. It has been linked to many disorders such as obesity hypoventilation syndrome, atelectasis and pulmonary embolism, adverse cardiovascular effects, and wound healing complications. If removable skin closures are used, they are removed after 7 to 10 days post-operatively, or after healing of the incision is well under way. It is not uncommon for surgical ...
Some historians (for example, Morell Mackenzie) credit Benjamin Guy Babington (1794-1866), who called his device the "glottiscope", with the invention of the laryngoscope. Philipp von Bozzini (1773-1809) and Garignard de la Tour were other early physicians to use mouth mirrors to inspect the oropharynx and hypopharynx. In 1854, the vocal pedagogist Manuel García (1805-1906) became the first man to view the functioning glottis and larynx in a living human. García developed a tool that used two mirrors for which the Sun served as an external light source. Using this device, he was able to observe the function of his own glottic apparatus and the uppermost portion of his trachea. He presented his findings at the Royal Society of London in 1855. All previous observations of the glottis and larynx had been performed under indirect vision (using mirrors) until 23 April 1895, when Alfred Kirstein (1863-1922) of Germany first described direct visualization of the vocal cords. ...
... is a palliative surgical procedure performed for patients with Tricuspid atresia. It is also part of the surgical treatment path for hypoplastic left heart syndrome.  This procedure has been largely replaced by Bidirectional Glenn procedure. It connects the superior vena cava to the right pulmonary artery. ...
Ankle-brachial pressure index
The patient must be placed supine, without the head or any extremities dangling over the edge of the table. Measurement of ankle blood pressures in a seated position will grossly overestimate the ABI (by approximately 0.3). A Doppler ultrasound blood flow detector, commonly called Doppler wand or Doppler probe, and a sphygmomanometer (blood pressure cuff) are usually needed. The blood pressure cuff is inflated proximal to the artery in question. Measured by the Doppler wand, the inflation continues until the pulse in the artery ceases. The blood pressure cuff is then slowly deflated. When the artery's pulse is re-detected through the Doppler probe the pressure in the cuff at that moment indicates the systolic pressure of that artery. The higher systolic reading of the left and right arm brachial artery is generally used in the assessment. The pressures in each foot's posterior tibial artery and dorsalis pedis artery are measured with the higher of the two values used as the ABI for that leg. ...
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While most IVC filters are made of non-ferromagnetic materials, there are a few types that are weakly ferromagnetic. Accordingly, IVC filters fall under the MRI Safe and MRI Conditional categories depending mostly on type of material used during construction. Rarely will one find an MRI Not Safe IVC filter, as most of the steel, and other ferromagnetic material devices have been discontinued via the FDA. IVC filters are attached to the vena cava via hooks on their ends. Some are compression springs, which compress outward onto the side wall of the vena cava; however, they still have small hooks that retain their location. These hooks aid in the anchoring and healing process, as they allow the tissues to 'ingrow' around them, securing the IVC in place. It is unlikely, then, after 4 to 6 weeks of healing, that an MRI of 1.5 tesla, up to 3 tesla, will cause any level of dislodging to occur to the IVC filter. Studies of MR examination of both animals and humans, with implanted IVC filters, have not ...
The original procedure was named for Alfred Blalock, surgeon, Baltimore (1899-1964), Helen B. Taussig, cardiologist, Baltimore/Boston (1898-1986) and Vivien Thomas (1910-1985) who was at that time Blalock's laboratory technician. They all helped to develop the procedure. Taussig, who treated hundreds of infants and children with this disorder, had observed that children with a cyanotic heart defect and a patent ductus arteriosus (PDA) lived longer than those without the PDA. It therefore seemed to her that a shunt which mimicked the function of a PDA might relieve the tetralogy patients' poor oxygenation. In 1943, having broached the possibility of a surgical solution to Robert Gross of Boston without success, Taussig approached Blalock and Thomas in their Hopkins laboratory in 1943. According to the account of the original consultation between the three provided in Vivien Thomas' 1985 autobiography Partners of the Heart, Taussig carefully described the anomaly of Tetralogy of Fallot, but made ...
After angioplasty, most patients are monitored overnight in the hospital, but if there are no complications, patients are sent home the following day. The catheter site is checked for bleeding and swelling and the heart rate and blood pressure is monitored. Usually, patients receive medication that will relax them to protect the arteries against spasms. Patients are typically able to walk within two to six hours following the procedure and return to their normal routine by the following week. Angioplasty recovery consists of avoiding physical activity for several days after the procedure. Patients are advised to avoid any type of lifting, or other strenuous physical activity for a week. Patients will need to avoid physical stress or prolonged sport activities for a maximum of two weeks after a delicate balloon angioplasty. After the initial two week recovery phase, most angioplasty patients can begin to safely return to low-level exercise. A graduated exercise program is recommended ...
The specialty continues to be based on operative arterial and venous surgery but since the early 1990s has evolved greatly. There is now considerable emphasis on minimally invasive alternatives to surgery. The field was originally pioneered by interventional radiologists, chiefly Dr. Charles Dotter, who invented angioplasty. Further development of the field has occurred via joint efforts between interventional radiology, vascular surgery, and interventional cardiology. This area of vascular surgery is called Endovascular Surgery or Interventional Vascular Radiology, a term that some in the specialty append to their primary qualification as Vascular Surgeon. Endovascular and endovenous procedures can now form the bulk of a vascular surgeon's practice.. The development of endovascular surgery has been accompanied by a gradual separation of vascular surgery from its origin in general surgery. Most vascular surgeons would now confine their practice to vascular surgery and similarly general surgeons ...
... , or impedance plethysmography (IPG), is a non-invasive medical test that measures small changes in electrical resistance of the chest, calf or other regions of the body. These measurements reflect blood volume changes, and can indirectly indicate the presence or absence of venous thrombosis. This procedure provides an alternative to venography, which is invasive and requires a great deal of skill to execute adequately and interpret accurately. For the chest, the technique was developed by NASA to measure the split second impedance changes within the chest, as the heart beats, to calculate both cardiac output and lung water content. This technique has progressed clinically (often now called BioZ, i.e. biologic impedance, as promoted by the leading manufacturer in the US) and allows low cost, non-invasive estimations of cardiac output and total peripheral resistance, using only 4 skin electrodes, oscillometric blood pressure measurement and lung water volumes with minimal ...
During the procedure the patient is often given sedation intravenously, employing agents such as fentanyl or midazolam. Although meperidine (Demerol) may be used as an alternative to fentanyl, the concern of seizures has relegated this agent to second choice for sedation behind the combination of fentanyl and midazolam. The average person will receive a combination of these two drugs, usually between 25 and 100 µg IV fentanyl and 1-4 mg IV midazolam. Sedation practices vary between practitioners and nations; in some clinics in Norway, sedation is rarely administered. Some endoscopists are experimenting with, or routinely use, alternative or additional methods such as nitrous oxide and propofol, which have advantages and disadvantages relating to recovery time (particularly the duration of amnesia after the procedure is complete), patient experience, and the degree of supervision needed for safe administration. This sedation is called "twilight anesthesia". For some patients ...
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Angioscopy - Wikipedia
The instrument used to perform angioscopy is called as angioscope. Coronary artery angioscopy, which first was used to reveal ... Angioscopy is a medical technique for visualizing the interior of blood vessels. In this technique, a flexible fiberoptic ... catheter inserted directly into an artery. It can be helpful in diagnosing e.g. arterial embolism. Angioscopy is also ... Retrieved from "https://en.wikipedia.org/w/index.php?title=Angioscopy&oldid=768649155" ...
Coronary Angioscopy | SpringerLink
Starting with the structure and fundamental principles of angioscopy, it shows ... This book presents a thorough review of coronary angioscopy, ranging from instructions on its use to the latest advances. ... Angioscopy is a unique medical technique for visualizing the interior of blood vessels and helps physicians not only to ... The authors are leading researchers on angioscopy. This book offers the perfect guide not only for new clinicians but also for ...
Virtual coronary angioscopy using multislice computed tomography | Heart
Background: With faster image acquisition times and thinner slice widths, multislice detector computed tomography (MSCT) allows visualisation of human coronary arteries with diagnostic image quality. In addition to conventional axial slices, virtual coronary angioscopies (VCA) can be reconstructed using MSCT datasets.. Objective: To evaluate the feasibility of reconstructing VCA and to determine the clinical value of this new application in detecting atherosclerotic coronary artery lesions.. Methods: Datasets obtained by contrast enhanced non-invasive coronary angiography using MSCT (Somatom VZ) were analysed from 14 consecutive patients. VCA were simulated in 14 coronary arteries (left anterior descending, n = 7; right coronary, n = 7). Lesion detection was undertaken on conventional contrast enhanced axial slices, as well as by VCA. Intracoronary ultrasound (ICUS) was used as the gold standard for in vivo plaque detection.. Results: 38 lesions were detected both on ICUS and on axial slices: 14 ...
Angioscopy | Harvard Catalyst Profiles | Harvard Catalyst
"Angioscopy" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical Subject ... Below are MeSH descriptors whose meaning is more general than "Angioscopy".. *Analytical, Diagnostic and Therapeutic Techniques ... This graph shows the total number of publications written about "Angioscopy" by people in Harvard Catalyst Profiles by year, ... Below are the most recent publications written about "Angioscopy" by people in Profiles. ...
Angioscopy and Chronic Pulmonary Arterial Obstruction | Annals of Internal Medicine | American College of Physicians
Angioscopy and Chronic Pulmonary Arterial Obstruction BRUCE H. BRUNDAGE, M.D.; STUART RICH, M.D. ... To the editor: Shure and colleagues (1) recently reported on the use of angioscopy in patients with chronic pulmonary arterial ... BRUNDAGE BH, RICH S. Angioscopy and Chronic Pulmonary Arterial Obstruction. Ann Intern Med. ;104:586. doi: 10.7326/0003-4819- ...
Percutaneous angioscopy of sapphire-tip laser angioplasty | (1990) | Rees | Publications | Spie
... angioscopy demonstrated significant sub-intirnal dissections (2/8 cases) . Angioscopy provides valuable clinical information to ... Percutaneous angioscopy of sapphire-tip laser angioplasty Author(s): Michael Ralph Rees; Abdurrazak A. Gehani; Simon Ashley; ... Percutaneous angioscopy using flexible steerable 2.2mm diameter and non-steerable 1.4 mm. angioscopes together with a guiding ... Prior to laser angioplasty, angioscopy demonstrated endoluminal findings that were not detected by angiography. Following laser ...
Coronary angioscopy before and after stent deployment | (1993) | Denardo | Publications | Spie
Coronary angioscopy before and after stent deployment Author(s): Scott J. Denardo; Richard A. Schatz; Krishna J. Rocha-Singh; S ... Coronary angioscopy was used in an attempt to visualize the internal architecture of cardiac vessels before and after ... In 24 patients, angioscopy was performed both after preliminary balloon angioplasty and then again after stent deployment. In ... In 16 of these 24 patients a dissection was documented by angioscopy after balloon angioplasty. The dissection was absent after ...
RePub, Erasmus University Repository: Chromatic distortion during angioscopy: assessment and correction by quantitative...
Angioscopy, *Color, *Colorimetry, *Image Interpretation, Computer-Assisted, Algorithms, Catheterization, Humans, Image ... Lehmann, K.G, Oomen, J.A.F, Serruys, P.W.J.C, de Feyter, P.J, & Slager, C.J. (1998). Chromatic distortion during angioscopy: ... Angioscopy represents a diagnostic tool with the unique ability of assessing the true color of intravascular structures. ... It can also help overcome current limitations in angioscopy research and clinical use imposed by the reliance on visual ...
The added value of CT virtual angioscopy to MDCT angiography in the evaluation of aortic diseases | SpringerLink
Incorporation of virtual angioscopy (VA) in the diagnostic work-up of aortic diseases could improve the clinical value and ... Basha, M.A.A., Salem, A.F., Azmy, T.M. et al. The added value of CT virtual angioscopy to MDCT angiography in the evaluation of ... Incorporation of virtual angioscopy (VA) in the diagnostic work-up of aortic diseases could improve the clinical value and ... Virtual angioscopy and 3D navigation: a new technique for analysis of the aortic arch after vascular surgery. European Journal ...
Table 5 | Detection of Vulnerable Coronary Plaques by Color Fluorescent Angioscopy | JACC: Cardiovascular Imaging
1994 - Angioscopy was more sensitive than angiography for intracoronary thrombus | 1995 Mar-Apr : Volume 122, Number 2, Page 45...
Coronary angiography was less sensitive than angioscopy for detecting intracoronary thrombus. Angioscopy and angiography were ... Angioscopy was more sensitive than angiography for intracoronary thrombus. ACP J Club. 1995 Mar-April;122:45. doi:10.7326/ACPJC ... Will coronary angioscopy become a tool for every patient having coronary intervention? This is unlikely, although the more ... When angioscopy was used as the diagnostic standard, the sensitivity of angiography for detecting thrombus was 19%, the ...
Findings of optical frequency domain imaging and coronary angioscopy in a lesion with spontaneous recanalization identified by...
Mechanical and structural characteristics of vulnerable plaques: analysis by coronary angioscopy and intravascular ultrasound |...
1991) Percutaneous angioscopy during angioplasty using a steerable microangioscopy. J Am Coll Cardiol 17:100-105. ... 1995) Prediction of acute coronary syndromes by percutaneous angioscopy in patients with stable angina. Am Heart J 130:195-203. ... Coronary angioscopy was performed with an image catheter (Vecmova, Clinical Supply Co., Gifu, Japan). Before use, the white ... Pre-interventional coronary angioscopy and IVUS images were obtained from 57 patients with ischemic heart disease. Catheter ...
Angioscopy-assisted aneurysm clipping<...
title = "Angioscopy-assisted aneurysm clipping",. abstract = "OBJECTIVE: To test the concept that endovascular angioscopy can ... Angioscopy has the potential to become a useful adjunct during intracranial aneurysm clipping because it provides real-time ... Angioscopy has the potential to become a useful adjunct during intracranial aneurysm clipping because it provides real-time ... Angioscopy has the potential to become a useful adjunct during intracranial aneurysm clipping because it provides real-time ...
Mechanisms of Very Late Stent Thrombosis After Drug-Eluting Stent Implantation: Findings From Coronary Angioscopy and Optical...
Findings From Coronary Angioscopy and Optical Coherence Tomography ... Mechanisms of Very Late Stent Thrombosis After Drug-Eluting Stent Implantation: Findings From Coronary Angioscopy and Optical ... Correlation Between Plaque Color Classification by Coronary Angioscopy and Fibrous Cap Thickness by Optical Coherence ... Stent Thrombosis after Sirolimus-Eluting Stent Implantation Observed Using Optical Coherence Tomography and Coronary Angioscopy ...
Cauliflower-Like Appearance of Calcified Nodules Observed by Coronary Angioscopy | Circulation: Cardiovascular Interventions
Cauliflower-Like Appearance of Calcified Nodules Observed by Coronary Angioscopy. Kazuoki Dai, Kazuki Suruga, Yasuhisa Nakao, ... Cauliflower-Like Appearance of Calcified Nodules Observed by Coronary Angioscopy. Kazuoki Dai, Kazuki Suruga, Yasuhisa Nakao, ... Cauliflower-Like Appearance of Calcified Nodules Observed by Coronary Angioscopy. Kazuoki Dai, Kazuki Suruga, Yasuhisa Nakao, ... such as coronary angioscopy, optical frequency domain imaging, and intravascular ultrasound during percutaneous coronary ...
Millirobotics in Telesurgery
Angioscopy in vascular surgery: The state of the art<...
The risks of angioscopy are acceptably low.. AB - Although angioscopy is considered by many vascular surgeons to be a valuable ... title = "Angioscopy in vascular surgery: The state of the art",. abstract = "Although angioscopy is considered by many vascular ... Angioscopy in vascular surgery : The state of the art. In: Annals of Vascular Surgery. 1996 ; Vol. 10, No. 1. pp. 66-75. ... Pevec, WC 1996, Angioscopy in vascular surgery: The state of the art, Annals of Vascular Surgery, vol. 10, no. 1, pp. 66-75. ...
Coronary thrombosis - Wikipedia
Internet Scientific Publications
... performed angioscopy in 21 patients undergoing angiography and concluded that angioscopy is superior to angiography for ... Coronary angioscopy is an excellent research tool, however, its role in day-to-day management is not defined. ... C, Angioscopy view after angioplasty revealing an improved lumen diameter and displacement of the friable plaque. D, Angiogram ... Percutaneous Angioscopy Of Saphenous Vein Coronary Bypass Grafts Angiography remains the reference standard for the diagnosis ...
DICOM - Wikipédia, a enciclopédia livre
Patent US20020095167 - Automated annular plication for mitral valve repair - Google Patents
Evaluation of thrombus removal by transluminal extraction coronary atherectomy by percutaneous coronary angioscopy<...
Coronary angioscopy was superior to angiography for evaluating the efficacy of thrombus removal after TEC. In patients with ... N2 - Coronary angioscopy was superior to angiography for evaluating the efficacy of thrombus removal after TEC. In patients ... AB - Coronary angioscopy was superior to angiography for evaluating the efficacy of thrombus removal after TEC. In patients ... abstract = "Coronary angioscopy was superior to angiography for evaluating the efficacy of thrombus removal after TEC. In ...
Patent US6387324 - Apparatus and method for blood oxygenation - Google Patents
Patent US5289373 - Method and apparatus for real-time tracking of catheter guide wires in ... - Google Patents
Peripheral Endovascular Interventions | Thomas J. Fogarty | Springer
Patent US5274551 - Method and apparatus for real-time navigation assist in interventional ... - Google Patents
Table 3 | Number of Yellow Plaques Detected in a Coronary Artery Is Associated With Future Risk of Acute Coronary Syndrome |...
- Prior to laser angioplasty, angioscopy demonstrated endoluminal findings that were not detected by angiography. (spie.org)
- In seven patients, thrombus that was not apparent by angiography was visualized by angioscopy. (spie.org)
- Moreover, in four patients, thrombus that was suggested by angiography could not be confirmed by angioscopy. (spie.org)
- Incorporation of virtual angioscopy (VA) in the diagnostic work-up of aortic diseases could improve the clinical value and efficiency of multidetector computed tomography angiography (MDCTA). (springer.com)
- To compare coronary angioscopy with angiography for the detection of intimal dissection and intracoronary thrombus. (acpjc.org)
- Blinded comparison of coronary angioscopy with angiography. (acpjc.org)
- 52 patients (mean age, 61 y) who had both coronary angiography and coronary angioscopy during the same cardiac catheterization session. (acpjc.org)
- 2 angiographic dissections were undetected by angioscopy, and 27 angioscopic dissections were undetected by angiography. (acpjc.org)
- Angioscopy and angiography were complementary diagnostic tools for detecting intimal dissections. (acpjc.org)
- I do not believe that angioscopy is likely to provide additional clinical value for coronary dissection above that provided by angiography. (acpjc.org)
- Coronary angioscopy was superior to angiography for evaluating the efficacy of thrombus removal after TEC. (elsevier.com)
- Acute ischaemic episodes such as myocardial infarction and unstable angina have been shown by histology, 6 angiography, 7 and angioscopy 8 to be largely caused by thrombosis developing over a culprit plaque. (bmj.com)
- Indicated in diagnostic fluorescein angiography or angioscopy of the fundus and of the iris vasculature. (rxlist.com)
- One of the major factors anticipated to drive the growth of the global angioscope device market during the forecast period is the research and developments being conducted in angiography and the consequent innovations, which are providing advancements in angioscopy. (yahoo.com)
- FLUORESCITE ® Injection 10% is indicated in diagnostic fluorescein angiography or angioscopy of the retina and iris vasculature. (rxlist.com)
- Comparision of angioscopy and angiography for monitoring infrainguinal bypass vein grafts: Results of a prospective randomized trial. (columbiadoctors.org)
- Angioscopy is a unique medical technique for visualizing the interior of blood vessels and helps physicians not only to diagnose the pathology but also to measure the effectiveness of Percutaneous coronary intervention (PCI) or antiarteriosclerotic drugs. (springer.com)
- Percutaneous angioscopy using flexible steerable 2.2mm diameter and non-steerable 1.4 mm. angioscopes together with a guiding catheter system was used to evaluate the endoluminal appearances before and after laser angioplasty using ND-YAG laser energy modified by 1.8,2.2 and 3.0 mm rounded sapphire probes in 8 patients with occlusive peripheral vascular disease. (spie.org)
- 1 Calcified nodules are sometimes observed by intracoronary imaging modalities, such as coronary angioscopy, optical frequency domain imaging, and intravascular ultrasound during percutaneous coronary intervention procedures. (ahajournals.org)
- 29. Percutaneous Cardiovascular Angioscopy. (booktopia.com.au)
- In 24 patients, angioscopy was performed both after preliminary balloon angioplasty and then again after stent deployment. (spie.org)
- Angioscopy was performed in a group of patients in the PRASugrel For Japanese PatIenTs with Coronary Artery Disease Undergoing Elective PCI (PRASFIT-Elective) study to determine the incidence and clinical features of stent thrombosis. (go.jp)
- 1 Angioscopy has been reported to be useful for the direct visualization of thrombus and allows for characterization of the vessel wall from inside, 2 but we cannot observe the distal side of CTO in coronary arteries. (ahajournals.org)
- Angioscopy represents a diagnostic tool with the unique ability of assessing the true color of intravascular structures. (eur.nl)
- This view changed when angioscopy and atherectomy studies compared the coronary lesions responsible for stable and unstable angina. (bmj.com)
- Angioscopy is a medical technique for visualizing the interior of blood vessels . (wikipedia.org)
- Angioscopy provides valuable clinical information to support in-vitro experimental evidence of the mode of action of sapphire probes. (spie.org)
- It can also help overcome current limitations in angioscopy research and clinical use imposed by the reliance on visual perception of color. (eur.nl)
- What is the likely clinical utility of coronary angioscopy? (acpjc.org)
- Although angioscopy is considered by many vascular surgeons to be a valuable clinical tool, others view it as expensive and unnecessary. (elsevier.com)
- Angioscopy can replace completion arteriography in infrainguinal arterial reconstructions with an equivalent clinical outcome. (elsevier.com)
- Angioscopy and Ultrasound Guidance. (booktopia.com.au)
- Virtual angioscopy and 3-dimensional navigation findings of the aortic arch after vascular surgery. (springer.com)
- Virtual angioscopy and 3D navigation: a new technique for analysis of the aortic arch after vascular surgery. (springer.com)
- To better define the appropriate role for angioscopy in vascular surgery, a critical review of the recent literature was undertaken. (elsevier.com)
- Pevec, WC 1996, ' Angioscopy in vascular surgery: The state of the art ', Annals of Vascular Surgery , vol. 10, no. 1, pp. 66-75. (elsevier.com)
- (C) Coronary angioscopy (CAS) findings at baseline (a) and post-PCB angioplasty (b) . (onlinejacc.org)
- To the editor: Shure and colleagues (1) recently reported on the use of angioscopy in patients with chronic pulmonary arterial obstruction. (annals.org)
- BRUNDAGE BH, RICH S. Angioscopy and Chronic Pulmonary Arterial Obstruction. (annals.org)
- Angioscopy allows more complete valvulotomies with fewer endothelial injuries when preparing autogenous veins to be used as arterial conduits, and results in more complete thromboembolectomy of native arteries and grafts. (elsevier.com)
- Angioscopy is of benefit in preparing veins to be used as arterial conduits and in performing thromboembolectomy. (elsevier.com)
- Maldjian PD, Partyka L. Intimal tears in thoracic aortic dissection: appearance on MDCT with virtual angioscopy. (springer.com)
- Frequency-domain optical coherence tomography (FD-OCT) revealed homogeneous neointima ( Figure 1B-a ) and coronary angioscopy (CAS) revealed white neointimal coverage at the ISR site ( Figure 1C-a ). (onlinejacc.org)
- RePub, Erasmus University Repository: Chromatic distortion during angioscopy: assessment and correction by quantitative colorimetric angioscopic analysis. (eur.nl)
- Izquierdo L, Leiva L. Virtual angioscopy assessment for acute type B aortic dissection endovascular repair. (springer.com)
- Angioscopy may be useful in the assessment of carotid endarterectomy, femoral vein valve repair, and pulmonary embolectomy. (elsevier.com)
- 1993) Angioscopy in variant angina: coronary artery spasm and intimal injury. (scirp.org)
- In 16 of these 24 patients a dissection was documented by angioscopy after balloon angioplasty. (spie.org)
- Angioscopy was done before ( n = 15) or after ( n = 37) coronary balloon angioplasty. (acpjc.org)
- Coronary angioscopy after paclitaxel-coated balloon angioplasty revealed that undissolved drugs were floating and flowed distally ( C-c, blue arrow , Online Video 1 ). (onlinejacc.org)
- OBJECTIVE: To test the concept that endovascular angioscopy can assist surgical intracranial aneurysm clipping by providing an endoluminal view of the aneurysm-parent vessel complex. (elsevier.com)
- A study was published in the Journal of Cardiology in April 2020, in which non-obstructive general angioscopy was used for observing the aortic intima and for identifying unusual conditions before carrying out thoracic endovascular repair (TEVAR) of chronic type B aortic dissection. (yahoo.com)
- Cambridge Consultants, a UK firm, and OmniVision, based in California developed a high-definition miniature camera called 'Leap', showcased at the Asia Pacific MedTech Forum 2018 in Singapore, for angioscopy which enables the surgeons to have a digital view inside veins and arteries which were not accessible with the previously available imaging techniques. (yahoo.com)
- Coronary artery angioscopy, which first was used to reveal the presence of a blood clot in the coronary arteries of patients with unstable angina and myocardial infarction, is now widely used in catherization laboratories to visualize stents. (wikipedia.org)
- Atherosclerotic plaques of coronary arteries can be classified into two types according to color by coronary angioscopy. (onlinejacc.org)
- Starting with the structure and fundamental principles of angioscopy, it shows readers how to apply the image to comprehensive care of coronary-artery patients. (springer.com)
- Coronary angioscopy was used in an attempt to visualize the internal architecture of cardiac vessels before and after deployment of Palmaz-Schatz stents in 50 patients. (spie.org)
- Coronary angioscopy was performed before and at 36 weeks after elective PCI in 19 and 14 patients treated with prasugrel and clopidogrel, respectively, across eight participating institutions. (go.jp)
- Coronary angioscopy in patients with unstable angina pectoris. (nii.ac.jp)
- The plaques were classified as either yellow or white using coronary angioscopy. (onlinejacc.org)
- The instrument used to perform angioscopy is called as angioscope. (wikipedia.org)
- These innovations are further expanding the scope of angioscopy and are anticipated to propel the growth of the global angioscope device market during the forecast period. (yahoo.com)
- The growing cases of cardiovascular diseases around the world have led to the increased use of angioscopy, which is anticipated to surge the growth of the global angioscope device market during the forecast period. (yahoo.com)
-  Angioscopy is also used as an adjunctive procedure during vascular bypass to visualize valves within venous conduits. (wikipedia.org)
- Angioscopy" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (harvard.edu)
- Angioscopy was done with the Image-Cath system (Baxter, Interventional Cardiology Division). (acpjc.org)
- This graph shows the total number of publications written about "Angioscopy" by people in Harvard Catalyst Profiles by year, and whether "Angioscopy" was a major or minor topic of these publication. (harvard.edu)
- Below are the most recent publications written about "Angioscopy" by people in Profiles. (harvard.edu)
- Virtual Angioscopy Using Spiral CT and Real-Time Interactive Volume-Rendering Techniques. (springer.com)
- Depth-map-based scene analysis for active navigation in virtual angioscopy. (springer.com)
- Tomás AC, Santos ÁL, Fragata J. Virtual angioscopy and 3D navigation of the aorta. (springer.com)
- These virtual objects include three-dimensional (3D) objects (namely 3D models of the skin and vascular structures) and two-dimensional (2D) objects [namely orthogonal views of computed tomography (CT) angiograms, 2D images of 3D vascular models, and 2D images of a new virtual angioscopy whose appearance of the vessel wall follows that shown in ex vivo and in vivo angioscopies]. (degruyter.com)