Endoscopic examination, therapy or surgery performed on the interior of blood vessels.
Endoscopes used for viewing the interior of blood vessels.
Coagulation of blood in any of the CORONARY VESSELS. The presence of a blood clot (THROMBUS) often leads to MYOCARDIAL INFARCTION.
The veins and arteries of the HEART.
Lesions formed within the walls of ARTERIES.
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.
The use of ultrasound to guide minimally invasive surgical procedures such as needle ASPIRATION BIOPSY; DRAINAGE; etc. Its widest application is intravascular ultrasound imaging but it is useful also in urology and intra-abdominal conditions.
Instruments for the visual examination of interior structures of the body. There are rigid endoscopes and flexible fiberoptic endoscopes for various types of viewing in ENDOSCOPY.
Radiography of the vascular system of the heart muscle after injection of a contrast medium.
The vein which drains the foot and leg.
Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.

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)

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] ...
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 ...
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 ...
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 ...
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 ...
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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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 ...
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 ...
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 ...
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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) ...
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 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 ...
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Coronary thrombi in patients who die suddenly are more likely to display signs of healing if they are caused by a plaque erosion rather than a rupture, researchers found.
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To allow for the differences in yellow color in each plant extract primarily due to varying amounts of contaminating photosynthetic pigments, it was necessary to blank each extract separately with diluted extract in buffer lacking the GUS substrate, PNPG. Once you have obtained corrected absorbance values by subtracting the absorbance due to yellow color that is not related to PNPG breakdown, you also must normalize the activities further so that you can compare plants. Typically activities are expressed on a per mg fresh weight or protein basis. Because the method used to cut the tissue disks produce tissue pieces of a uniform size we will express our enzyme activities on a per disk basis. Calculate the GUS activity found in each of your extracts as: Activity = nmoles product formed/minute-leaf disk. You may then compare your data with those of your classmates ...
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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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Bleach could be the cause of the newer stains because my friend used bleach to get a stain out of her white sweatshirt before and because she did not wash it after using the bleach it had a big yellow stain where she had been rubbing...and for us we found out pretty quickly that it was irreversible i know that s not what u want to hear but we tried just about everything with her sweatshirt and nothing brought it out because its like a bleach stain and how do u get out a bleach stain.I hope my answer will help you a lot ...
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Hi! Im a vet student; Ive just necropsied a pigeon and found a green liver with two white plaques. What could be happening? Is it a sign of toxicity or infection, or is it just normal colour variation? The pigeon was previously diagnosed to have Candidiasis because of white-yellowish masses in the mouth. When I did the swab examination, I found hyphae but couldnt determine yet whether its Candida. Respiratory system got no lesion, unless some compaque-white appearance of the trachea. Digestive system got severe lesion in the crop, where theres some brown crusts. Is it a sole Candida infection or perhaps I should consider differential diagnose like Pox virus or Salmonella? I cant find any colour picture reference that match the lesion of my pigeon.. Could you please recommend me any book or online atlas? Thanks a million!. ...
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 ...
A: Vanguard eCare visits are telemedicine doctor appointments that are conducted through video technology for our patients. They are scheduled seven days a week, from 8 a.m. to 8 p.m. You will be seen by a Vanguard provider, much like your office visits. Instead of coming into the office for your appointment, you stay home and use your smartphone, laptop, or other personal device with a camera to see and talk to your physician/provider.. Vanguard Medical Group uses Updox Video Chat to communicate with patients. This is a safe and easy way to talk to your provider, often saving you a trip to your doctors office.. ...
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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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 ...
"Dynamic anatomical study of cardiac shunting in crocodiles using high-resolution angioscopy" (PDF). The Journal of Experimental ...
"Dynamic Anatomical Study of Cardiac Shunting in Crocodiles Using High-Resolution Angioscopy" (PDF). The Journal of Experimental ...
Axelsson, Michael; Craig E. Franklin (1997). "From anatomy to angioscopy: 164 years of crocodilian cardiovascular research, ...
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 ...
His research focuses on the use of intravascular ultrasound and angioscopy in coronary artery disease after heart ...
Fluorescein angiography and angioscopy is recommended for patients with abnormal findings that may be indicative of ...
... for detecting myocardial infarction Angioscopy using a flexible fiberoptic catheter inserted directly into an artery. ...
... angioscopy arthroscopy bronchoscopy colposcopy cystoscopy fetoscopy hysteroscopy gastrointestinal endoscopy including ...
... angioscopy endocoronary ultrasound coronary angiography magnetic resonance imaging (MRI) Postmortem examiners may look for ...
Forrester led a team that developed coronary angioscopy, a method for seeing inside a living patient's coronary arteries using ...
... 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 ...
... 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. ...
"Dynamic anatomical study of cardiac shunting in crocodiles using high-resolution angioscopy" (PDF), The Journal of Experimental ...
Fluorescein angiography or angioscopy of eye (95.13) Ultrasound study of eye (95.14) X-ray study of eye (95.15) Ocular motility ...
Our requirements are stated in our rapid response terms and conditions and must be read. These include ensuring that: i) you do not include any illustrative content including tables and graphs, ii) you do not include any information that includes specifics about any patients,iii) you do not include any original data, unless it has already been published in a peer reviewed journal and you have included a reference, iv) your response is lawful, not defamatory, original and accurate, v) you declare any competing interests, vi) you understand that your name and other personal details set out in our rapid response terms and conditions will be published with any responses we publish and vii) you understand that once a response is published, we may continue to publish your response and/or edit or remove it in the future ...
"Microscopic Angioscopy" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical ... This graph shows the total number of publications written about "Microscopic Angioscopy" by people in this website by year, and ... Below are the most recent publications written about "Microscopic Angioscopy" by people in Profiles. ... This is not the same as endoscopic examination of blood vessels (ANGIOSCOPY). ...
MICROSCOPIC ANGIOSCOPY ANGIOSCOPIA MICROSCOPICA ANGIOSCÓPIOS ANGIOSCOPES ANGIOSCOPIOS APÊNDICE ATRIAL ATRIAL APPENDAGE APENDICE ...
Asia Pacifics first Directional Atherectomy, Drug Eluting Stenting, and Angioscopy. *Specialized in Cardiac Bypass Surgery, ...
Multimodal laser-based angioscopy for structural, chemical and biological imaging of atherosclerosis. Nat Biomed Eng 2017;1: ...
... video angioscopy, and clinical education. In clinical practice, biomedical videos are reviewed by clinical experts and then ...
This article describes coronary artery nomenclature using computerized tomography angiography and virtual angioscopy. These ... This article describes coronary artery nomenclature using computerized tomography angiography and virtual angioscopy. These ...
Assesment of Imtramural Thrombus at 1 Month and 3 Month evaluated with Histology and Angioscopy in Pig Coronary model. ...
"Plaque-stabilizing effect of atorvastatin is stronger for plaques evaluated as more unstable by angioscopy and intravenous ...
The 1.35mm diameter of Leap camera allows flexibility in various angioscopy procedures, such as intracoronary angioscopy. It ...
Angioscopy - Preferred Concept UI. M0026609. Scope note. Endoscopic examination, therapy or surgery performed on the interior ... coordinate with specific vessel (IM); do not confuse with MICROSCOPIC ANGIOSCOPY; /instrum permitted but consider also ...
Angioscopy (procedure). Code System Preferred Concept Name. Angioscopy (procedure). Concept Status. Published. ...
Microscopic Angioscopy Medicine & Life Sciences 100% * Raynaud Disease Medicine & Life Sciences 84% ...
MICROSCOPIC ANGIOSCOPY. ANGIOSCOPIA MICROSCÓPICA. ANGIOSCOPIOS. ANGIOSCOPES. ANGIOSCÓPIOS. APENDICE ATRIAL. ATRIAL APPENDAGE. ...
MICROSCOPIC ANGIOSCOPY. ANGIOSCOPIA MICROSCÓPICA. ANGIOSCOPIOS. ANGIOSCOPES. ANGIOSCÓPIOS. APENDICE ATRIAL. ATRIAL APPENDAGE. ...
MICROSCOPIC ANGIOSCOPY ANGIOSCOPIA MICROSCOPICA ANGIOSCÓPIOS ANGIOSCOPES ANGIOSCOPIOS APÊNDICE ATRIAL ATRIAL APPENDAGE APENDICE ...
MICROSCOPIC ANGIOSCOPY. ANGIOSCOPIA MICROSCÓPICA. ANGIOSCOPIOS. ANGIOSCOPES. ANGIOSCÓPIOS. APENDICE ATRIAL. ATRIAL APPENDAGE. ...
MICROSCOPIC ANGIOSCOPY ANGIOSCOPIA MICROSCOPICA ANGIOSCOPIA MICROSCÓPICA MICROSCOPY, SCANNING PROBE MICROSCOPIA DE SONDA DE ...
MICROSCOPIC ANGIOSCOPY ANGIOSCOPIA MICROSCOPICA ANGIOSCOPIA MICROSCÓPICA MICROSCOPY, SCANNING PROBE MICROSCOPIA DE SONDA DE ...
MICROSCOPIC ANGIOSCOPY ANGIOSCOPIA MICROSCOPICA ANGIOSCÓPIOS ANGIOSCOPES ANGIOSCOPIOS APÊNDICE ATRIAL ATRIAL APPENDAGE APENDICE ...
MICROSCOPIC ANGIOSCOPY. ANGIOSCOPIA MICROSCÓPICA. ANGIOSCOPIOS. ANGIOSCOPES. ANGIOSCÓPIOS. APENDICE ATRIAL. ATRIAL APPENDAGE. ...
MICROSCOPIC ANGIOSCOPY ANGIOSCOPIA MICROSCOPICA ANGIOSCOPIA MICROSCÓPICA MICROSCOPY, SCANNING PROBE MICROSCOPIA DE SONDA DE ...
MICROSCOPIC ANGIOSCOPY ANGIOSCOPIA MICROSCOPICA ANGIOSCÓPIOS ANGIOSCOPES ANGIOSCOPIOS APÊNDICE ATRIAL ATRIAL APPENDAGE APENDICE ...
MICROSCOPIC ANGIOSCOPY. ANGIOSCOPIA MICROSCÓPICA. ANGIOSCOPIOS. ANGIOSCOPES. ANGIOSCÓPIOS. APENDICE ATRIAL. ATRIAL APPENDAGE. ...
MICROSCOPIC ANGIOSCOPY ANGIOSCOPIA MICROSCOPICA ANGIOSCOPIA MICROSCÓPICA MICROSCOPY, SCANNING PROBE MICROSCOPIA DE SONDA DE ...
MICROSCOPIC ANGIOSCOPY ANGIOSCOPIA MICROSCOPICA ANGIOSCOPIA MICROSCÓPICA MICROSCOPY, SCANNING PROBE MICROSCOPIA DE SONDA DE ...
MICROSCOPIC ANGIOSCOPY ANGIOSCOPIA MICROSCOPICA ANGIOSCOPIA MICROSCÓPICA MICROSCOPY, SCANNING PROBE MICROSCOPIA DE SONDA DE ...
Comparison of the Effect of Rosuvastatin 2.5 mg vs 20 mg on Coronary Plaque Determined by Angioscopy and Intravascular ...
A Parametric Study of Flushing Conditions for Improvement of Angioscopy Visibility. Mitsuzuka, K., Li, Y., Nakayama, T., Anzai ...
  • This article describes coronary artery nomenclature using computerized tomography angiography and virtual angioscopy. (techscience.com)
  • Virtual Angioscopy in Human Coronary Arteries with Visualization of Computational Hemodynamics. (fiu.edu)
  • von Haxthausen F, Jäckle S, Strehlow J, Ernst F, García-Vázquez V (2019) Catheter pose-dependent virtual angioscopy images visualized on augmented reality glasses. (fraunhofer.de)
  • Depth-map-based scene analysis for active navigation in virtual angioscopy. (uni-trier.de)
  • Microscopic Angioscopy" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (uchicago.edu)
  • This graph shows the total number of publications written about "Microscopic Angioscopy" by people in this website by year, and whether "Microscopic Angioscopy" was a major or minor topic of these publications. (uchicago.edu)
  • Below are the most recent publications written about "Microscopic Angioscopy" by people in Profiles. (uchicago.edu)
  • Therefore we investigated thrombus-related DES failure using coronary angioscopy (CAS), which is a robust tool for thrombus assessment. (springernature.com)
  • Ability of optical coherence tomography compared with intravascular ultrasound and coronary angioscopy. (cardiovascular.abbott)
  • Detecting intimal tear and subintimal blood flow of thrombosed acute aortic dissection with ulcer-like projections using non-obstructive angioscopy. (omicsdi.org)
  • The 1.35mm diameter of Leap camera allows flexibility in various angioscopy procedures, such as intracoronary angioscopy. (medicaldevice-network.com)
  • During his career span, he has pioneered numerous angioplasty techniques- Directional Atherectomy, Angioscopy, Stents, Thrombectomy devices and Drug Eluting Stents, use of Impella heart support device failing heart, Bioabsorbable Stents and TAVI and implemented it successfully both in India and other regions in Asia Pacific. (logintohealth.com)
  • AK-FLUOR ® is indicated in diagnostic fluorescein angiography or angioscopy of the retina and iris vasculature. (nih.gov)
  • Primarily this drug is indicated in diagnostic fluorescein angiography or angioscopy of the fundus and of the iris vasculature. (shreejipharmainternational.com)
  • In this article, we describe the history of the development of angioscopy, angioscopic systems and techniques, angioscopic changes associated with vascular diseases, angioscope-guided intravascular therapies, and evaluation of intravascular and surgical therapies. (scirp.org)
  • Dr. Kovács PhD. carried out first arterial angioscopy in Slovakia in 2006. (blumentalclinic.eu)
  • After the culprit lesion was crossed with a 0.014-inch wire, the angioscopy catheter was advanced to the lesion with the Guide Plus™ guide extension catheter (NIPRO, Osaka, Japan) as delivery catheter and 10% dextran was continuously flushed through the delivery catheter for the displacement of blood at a rate of 4 mL/second for a total of 40 mL by a power injector. (asiaintervention.org)
  • Percutaneous angioscopy, using high resolution fiberoptic imaging, allows direct and two-dimensional visualization of the vascular interior, thereby enabling macroscopic pathological diagnosis. (scirp.org)
  • Percutaneous angioscopy has revealed that the vascular luminal surface exhibits various colors and morphologies characteristic of different vascular diseases. (scirp.org)
  • Percutaneous angioscopy (AS) is a high resolution fiberoptic imaging technique which enables direct visualization of the vascular wall from within, thereby enabling macroscopic pathological diagnosis of vascular diseases. (scirp.org)
  • Angioscopy specifically can assist in detecting of hard cases, vulnerable plaques, and validation of stent placement. (ramot.org)
  • The lack of a fibrous cap and the exposed lipid core of the plaque were clearly recognised on angioscopy (Panel B, Moving image 1) . (asiaintervention.org)
  • Recently, dye-image angioscopy has been used clinically for analyses of thrombus composition, endothelial damage and plaque composition. (scirp.org)
  • Comparison of angioscopy and histopathology for the evaluation of carotid plaque characteristics: an ex vivo validation study. (hyo-med.ac.jp)
  • This study evaluated whether angioscopy is capable of identifying various plaque morphologies, including necrotic core and intraplaque hemorrhage (IPH) in the carotid artery. (hyo-med.ac.jp)