Search Results
Results 451 - 500 of 1077
< 5 6 7 8 9 10 11 12 13 14 15 >
Romano J G - - 1998
Retinal ischemia is often caused by emboli arising from the cardiac chambers or the common carotid artery bifurcation; the latter are often composed of cholesterol. However, in many patients no lesions are identified after evaluation of these sources of emboli. Two patients were observed who had retinal ischemia and emboli ...
Sharma S - - 1998
OBJECTIVE: To determine the value of visible retinal emboli as a diagnostic "test" for the detection of hemodynamically significant carotid artery stenosis in the setting of acute retinal artery occlusion. METHODS: A cross-sectional diagnostic accuracy study was performed in a tertiary North American center, with the results of the dichotomous ...
Gomez-Ulla F - - 1998
PURPOSE: The study was carried out to describe the indocyanine green angiographic findings in isolated primary retinal arterial macroaneurysms and their contribution to the diagnosis of this condition. METHODS: Fluorescein and indocyanine green angiography examination techniques were used to study isolated primary retinal arterial macroaneurysms in 8 consecutive patients with ...
Iijima H - - 1998
PURPOSE: To determine whether quantitative differences in systemic hypercoagulable state could be identified among patients with retinal vein occlusion at various sites of occlusion. METHODS: The value of thrombin-antithrombin III complex was determined in 57 patients with retinal vein occlusion within 1 month after the subjective onset of retinal vein ...
Wirostko W J - - 1998
BACKGROUND: A central retinal artery occlusion is a potentially blinding retinal vascular event with no effective treatment regimen available. Recently, a few reports have described improved vision in eyes with central retinal artery occlusions after selective fibrinolytic therapy followed by long-term systemic anticoagulation. Acceptance of this treatment, however, has been ...
Delaey C - - 1998
The present study provides evidence that retinal tissue may profoundly influence the retinal arterial smooth muscle cell tone by releasing an unknown retinal relaxing factor. Isolated bovine retinal arteries with and without adhering retinal tissue were mounted in a wire myograph for isometric tension recordings. The maximal contraction induced by ...
Yamamoto T - - 1998
PURPOSE: To investigate the effect of nilvadipine, a calcium-channel blocker, on the hemodynamics of retrobulbar vessels in normal-tension glaucoma. METHODS: Twenty-five patients who prospectively met the enrollment criteria underwent color Doppler imaging of the retrobulbar vessels before and after receiving 4 weeks of treatment with 2 mg oral nilvadipine twice ...
Hosal B M - - 1998
PURPOSE: The aim of this study was to assess hemodynamic changes in the retrobulbar circulation in patients with age-related macular degeneration (ARMD). METHODS: Color Doppler imaging was used to calculate blood flow velocities and vascular resistance of the central retinal artery, short posterior ciliary artery and ophthalmic artery in patients ...
Niwa Y - - 1998
The reproducibility of measurements by color Doppler imaging (CDI) were evaluated in Japanese patients with normal-tension glaucoma. Measurements were taken in the central retinal artery, the ophthalmic artery, and the short posterior ciliary arteries. Reproducibility was evaluated by calculating the coefficients of reproducibility for the peak systolic and end diastolic ...
Iijima H - - 1998
PURPOSE: To report a 49-year-old woman with unilateral central retinal vein occlusion and ipsilateral cilioretinal artery occlusion who showed familial dysplasminogenemia associated with elevated lipoprotein(a). METHOD: Case report. RESULTS: Extensive hemostatic and coagulation studies for causes of thrombosis, as well as family studies, disclosed decreased plasminogen activity without reduction of ...
Okeda R - - 1998
The etiopathogenesis of multiple spongy necrosis (MSN) of the pontine base was analyzed by examining the spatial relationship with intra- and extrafascicular vascular structures by reconstruction of serial sections of nine lesions from three autopsy cases. All nine lesions in the fascicles were distributed without any spatial relationship to the ...
Wrigstad A - - 1998
An otherwise healthy 39-year-old man with a dark spot in the visual field of his left eye showed retinal whitening, indicating a cilioretinal arterial obstruction and minor signs of venous stasis at the initial examination. The affected cilioretinal artery filled normally during fluorescein angiography. The visual acuity was 1.0 bilaterally. ...
Allee S D - - 1998
PURPOSE: We examined a patient with acute posterior multifocal placoid pigment epitheliopathy and bilateral central retinal vein occlusion. METHOD: Case report. A 28-year-old woman presented with the typical findings of acute posterior multifocal placoid pigment epitheliopathy. One month after presentation, the patient developed bilateral central retinal vein occlusion. RESULT: Four ...
Tucker S M - - 1998
This study was undertaken to establish the detailed vascular architecture of the lacrimal gland. The common carotid arteries of seven fresh human cadaver heads were injected with a compound consisting of a partially polymerized monomer, to which a catalyst and promoter were added to cause hardening. The soft tissue was ...
Tanaka T - - 1998
OBJECTIVE: The purpose of the study was to demonstrate that the arteriovenous shunt at the arteriovenous crossing could occur in major retinal vascular diseases other than Takayasu disease. DESIGN: Clinical review of consecutive case series. PARTICIPANTS: The authors studied 1885 eyes with retinal vascular diseases such as diabetic retinopathy, branch ...
Nasu T - - 1998
The blood supply in the equine hoof was studied by a microvascular casting corrosion technique and scanning electron microscopy in combination with observations of sections of the decalcificated digit. The dermal lamella was observed at the hoof wall and the dermal papilla at the other parts of the hoof. The ...
Takahashi K - - 1998
PURPOSE: To demonstrate the drainage routes that compensate the venous congestion in central retinal vein occlusion. METHODS: Indocyanine green angiography was performed in 13 eyes of 13 patients with central retinal vein occlusion at the involutional stage using a scanning laser ophthalmoscope. The interval between onset of central retinal vein ...
Lee S B - - 1998
The purpose of this study was to determine how closely peripapillary retinal vessel diameter is related to functional and structural optic nerve damage in primary open-angle glaucoma. Using optic disc photographs of 234 eyes of 141 patients with primary open-angle glaucoma and 139 eyes of 86 normal subjects, the diameters ...
Sharma S - - 1998
AIM: To determine the accuracy of visible retinal emboli as a diagnostic "test" for the likelihood of receiving anticoagulation or cardiac surgery based on the results of transthoracic echocardiography, in the setting of acute retinal arterial occlusion. METHODS: A multicentre retrospective diagnostic study at Kingston Eye Centre, Queen's University, Kingston, ...
Sharma S - - 1998
Acute retinal arterial occlusion is an ophthalmic condition that is associated with a high prevalence of systemic disease. Recent studies have demonstrated that significant numbers of patients with acute retinal arterial occlusion have both hemodynamically significant carotid artery stenosis and cardiac pathology that necessitates systemic therapy. Furthermore, emerging evidence show ...
Ruskell G - - 1998
BACKGROUND/AIMS: All blood drainage from the retina is thought to occur through the central retinal vein with rare, if any, exceptions. A chance observation of a specimen in which this pattern did not apply suggested that the subject required review. METHODS: An optic nerve head, identified from an earlier study ...
McDonough R L - - 1998
PURPOSE: To report a 34-year-old healthy man with an internal carotid artery dissection who presented with an ipsilateral branch retinal artery occlusion. METHOD: Case report. RESULTS: Ophthalmic examination of a young adult presenting with transient monocular visual loss and a superior nasal field defect disclosed a left inferior branch retinal ...
Sampaio F J - - 1998
In 65% of the cases regarding the ventral surface of the UPJ, there was a prominent artery, vein, or both in close relation to the ventral surface of the UPJ. In only 6.8% there was an inferior polar artery crossing anteriorly to the UPJ. Therefore, many of the vessels visualized ...
Sachs M - - 1998
We describe the historical development of surgical instruments exemplified by hemostatic forceps, starting with antique and medieval forceps used for the arrest of bleeding to modern atraumatic hemostatic forceps used for vascular reconstruction. Their development proceeded mainly in three steps: (1) development of ligature forceps directly for hemostasis (Celsus, first ...
Seemann M - - 1998
PURPOSE: The purpose of this study was to develop a shaded-surface and volume display (hybrid rendering method) of the whole vascular system of the cervico-cranial arteries using spiral computed tomography (SCT). MATERIALS AND METHODS: We examined 12 patients with anatomic abnormalities and pathological conditions of the arterial vascular system. The ...
Costa V P - - 1998
OBJECTIVE: This study aimed to evaluate the retrobulbar circulatory effects of reversed ophthalmic artery flow (ROAF) on the ophthalmic artery branches by means of color Doppler imaging. DESIGN: The design was a case-controlled study. PARTICIPANTS: Among 56 consecutive patients with severe (>70% stenosis) occlusive carotid artery disease, 15 patients (26.8%) ...
Akman A - - 1998
PURPOSE: The study was designed to quantify retinal vein width changes at the arterio-venous crossing and to evaluate the effects of hypertension on vein widths at "vein posterior to the artery" (VPA) and "vein anterior to the artery" (VAA) crossings. METHODS: The width of the retinal veins was measured at ...
Sharma S - - 1998
OBJECTIVE: To determine whether ophthalmologists can agree on the qualitative assessment of visible retinal emboli. DESIGN: Inter- and intraobserver agreement study. SETTING: The retina and vitreous subspecialty session at the 1996 Canadian Ophthalmological Society meeting. SUBJECTS: A total of 42 observers, of whom 30 were retinal specialists. OUTCOME MEASURES: The ...
McAllister I L - - 1998
BACKGROUND: This study was performed to determine the laser energy required to rupture both Bruch's membrane and retinal veins reliably in order to create a venous chorioretinal anastomosis. METHODS: A histological examination was conducted of argon green and YAG laser applications to the retina made prior to enucleation in eight ...
Takahashi K - - 1998
PURPOSE: To describe a case of radiation choroidopathy manifesting drastic remodeling of choroidal drainage routes. METHOD: Case report. A 34-year-old man who had received radiation treatment for a tumor in the upper eyelid of his right eye 15 years earlier had floating black spots. He was examined ophthalmologically, including with ...
Kumar B - - 1998
OBJECTIVE: Branch retinal vein occlusions (BRVOs) are known to occur most commonly in the vicinity of arteriovenous (A/V) crossings. The authors aimed to identify types of venous wall abnormalities in BRVO and document their position in relation to the A/V crossing. DESIGN: A retrospective review of the color photographs and ...
Pillai R S - - 1998
Treatment of pulmonary and systemic diseases may be improved and toxicity reduced by pulmonary deposition of drug-containing aerosols exhibiting delayed dissolution. Aqueous disodium fluorescein and pentamidine aerosols were dried, concentrated, and condensation coated with paraffin wax. The apparent mass median aerodynamic diameters of the coated fluorescein particles were 2.8-4.0 microns. ...
Matsunaga Y - - 1998
We report the case of a Japanese girl with a severe type of Moebius syndrome. Her morphological features were a mask-like face, limitation of horizontal eye movements, severe bulbar palsy, multiple and bilateral arthrogryposis including the elbow, knee, and ankle joints, and clubfeet. After birth, her general condition became worse ...
Rosa N - - 1998
PURPOSE: The authors present a preliminary report to test the usefulness of a new technique called power Doppler ultrasonography (PD) in the study of orbital vessels. MATERIAL AND METHODS: The ophthalmic artery and vein as well as the central retinal artery and vein have been examined in 10 patients with ...
Recupero S M - - 1998
An unusual case of a 32-year-old woman with branch retinal artery occlusion is presented. The patient was affected by Ménière's disease and had a history of occasional migraine headaches. A thorough clinical and laboratory investigation showed a high cholesterol level. Retinal arterial obstruction is rare in young people and it ...
Thurairajan G - - 1998
It is postulated that retinal arterial macroaneurysms (RAMs) occur at the site of incomplete embolic occlusion of a branch retinal artery. Embolic events of the retinal vessels are related to the state of the carotid artery tree and therefore Doppler ultrasonography of the carotid arteries in these patients is of ...
Simsek S - - 1998
PURPOSE: To evaluate the effect of sex in relation to crossing numbers, arterial overcrossings and occlusion sites in patients with branch retinal vein occlusion (BRVO). METHODS: Fifty-one eyes with BRVO (study group) and 48 eyes with retinal problems other than BRVO (control group) were investigated. All venous occlusions were examined ...
Turgut M - - 1998
The authors previously have reported the effects of neodymiumyttrium-aluminum-garnet (Nd: YAG) laser on the cartilage end-plates (CEPs) in an animal model. However, there is no experimental study in the literature which specifically addresses the effects of the laser on CEP vascularity. The aim of our study is to investigate the ...
Parsa C F - - 1998
PURPOSE: To report the fluorescein angiographic and Doppler ultrasonographic findings in a patient with apparent exclusive ciliary vascular supply of the retina of both eyes. METHODS: Case report. RESULTS: The ophthalmoscopic appearance of all arterial vessels emanating from both discs was consistent with a cilioretinal origin. Retinal veins also entered ...
Saatci A O - - 1999
PURPOSE: To report on a case of systemic non-Hodgkin's lymphoma and unilateral combined central retinal artery and vein occlusion. METHOD: We examined a 14-year-old boy who experienced a sudden unilateral visual loss five months after the initial diagnosis of systemic non-Hodgkin's lymphoma. RESULT: Visual loss was due to combined central ...
Funke C - - 1998
The ontogeny of the arteries of the pelvic extremity of Tupaia belangeri was investigated by light microscopy on the basis of serial sections of 30 embryos, dating from day 17 to day 42 post-copulation. In Tupaia, the gestational period takes approximately 43 days. Additionally, a 3-D reconstruction of the pelvic ...
Gurwood A S - - 1998
BACKGROUND: Retinal arterial macroaneurysms are an acquired retinal vascular abnormality. These isolated dilatations of the major retinal arterial branches are found within the posterior pole and are associated with systemic hypertension, arteriosclerosis, retinal emboli and cardiovascular disease. RESULTS: Although many patients are asymptomatic, vision loss is the most commonly manifested ...
Haase C G - - 1998
PURPOSE: Retinal artery occlusion (RAO) is caused by arterio-arterial or cardiovascular emboli in about 50% of all cases, but the role of non-embolic causes remains unclear. SUBJECTS AND METHODS: We studied 27 patients with amaurosis fugax (AFX), branch retinal artery occlusion (BRAO), central retinal artery occlusion (CRAO) and anterior ischaemic ...
Seo M S - - 1998
In the left eye of a 27-year-old man we found perivascular creamy sheathing of retinal veins with retinal hemorrhages and, on fluorescein angiography, delayed filling of veins with late leakage. Dramatic recovery of visual acuity and healing of retinal lesions followed intravenous corticosteroid therapy. However, the condition recurred several times ...
Ohtawa T - - 1998
To elucidate the conditions of atrophy in the sternocleidomastoid muscle (SCM) after modified neck dissection (MND), we tried to scrutinize the atrophic regions in the SCM and determine the cause of atrophy, by electromyography in 40 patients with SCM atrophy following MND. We also examined the detailed anatomy of the ...
Trevino R - - 1998
A case of bilateral, idiopathic, and recurrent branch retinal arterial occlusions occurring in an otherwise healthy 36-year-old woman is presented. The diagnosis of idiopathic recurrent branch retinal arterial occlusion was made after extensive medical investigations failed to find a cause for the occlusions. The differential diagnosis of retinal arterial occlusion ...
Paoli D - - 1998
The authors describe a case presented by a homocystinuric 26-year-old male patient with bilateral occlusion of the central retinal artery. Echography carried out the same day of the occlusion and the following days identified and monitored a mass located in the orbit of the OD. Characteristics and dimension of the ...
Sharma S - - 1997
OBJECTIVE: To determine the agreement between two ophthalmologists in the evaluation of two important funduscopic features related to acute retinal artery occlusion: retinal cloudy swelling and visible retinal emboli. DESIGN: An interobserver variability study in which two ophthalmologists (one trained in glaucoma, the other in neuro-ophthalmology) independently viewed fundus photographs ...
Costa V P - - 1997
OBJECTIVE: The purpose of the study was to evaluate the ophthalmologic findings and to analyze the retrobulbar hemodynamics of patients with severe (greater than 70% stenosis) occlusive carotid artery disease (OCAD) by means of color Doppler imaging (CDI). DESIGN: A case-controlled study. PARTICIPANTS: Fifty-six consecutive patients with severe OCAD and ...
Netland P A - - 1997
PURPOSE: To determine the effects of topical epinephrine and retrobulbar anesthesia containing lidocaine with epinephrine on retrobulbar hemodynamic measurements in the primate eye, using color Doppler ultrasound. METHODS: Color Doppler ultrasound measurements were performed at baseline and 90 minutes after masked administration of topical 2% epinephrine or balanced salt solution ...
< 5 6 7 8 9 10 11 12 13 14 15 >