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Results 251 - 300 of 770
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Werner Gerald S - - 2003
BACKGROUND: The evaluation of new therapeutic modalities to induce collateral growth in coronary artery disease require improved methods of angiographic characterization of collaterals, which should be validated by quantitative assessment of collateral function. METHODS AND RESULTS: In 100 patients with total chronic occlusion of a major coronary artery (duration >2 ...
Johnston Ronald B RB - - 2003
PURPOSE: Acute occlusion of the abdominal aorta requires rapid diagnosis and intervention to prevent loss of life or limb. The overall mortality due to embolic occlusion is reported to be over 30%. The most common source of emboli is the heart, secondary to atrial fibrillation or myocardial infarction. METHODS: A ...
Buschmann Ivo - - 2003
The role of the collateral circulation has been controversially discussed over many decades. With the availability of purified growth factors such as the fibroblast growth factors several studies provided data, that the growth of collateral arteries, termed arteriogenesis, is not limited to its natural timecourse. When applied in experimental models ...
Leatherman James W - - 2003
OBJECTIVE: To evaluate partial occlusion in patients with pulmonary hypertension with regard to a) the degree to which it leads to overestimation of pulmonary artery occlusion pressure (Ppao) and b) identification of factors that could enhance its recognition. DESIGN: Observational descriptive study. SETTING: Medical intensive care unit. PATIENTS: Fourteen patients ...
Jim M H - - 2003
In a critical distal right coronary artery bifurcation lesion, the proximal course of the posterior descending artery was also subtotally occluded. The posterior descending artery gave rise to a small sidebranch just before the occlusion. In the subsequent revascularization procedure, the bifurcation lesion was double-wired. One wire was placed in ...
Hsi Charles - - 2002
Mechanical coronary artery occlusion is required for minimally invasive direct coronary artery bypass and off-pump coronary artery bypass surgery. It is important that the method of occlusion be minimally traumatic. Chronic effects of these methods have never been studied. Temporary occlusion of coronaries utilizing suture snare, silastic loop snare, and ...
Vasilenko Yu V - - 2002
The mechanism of extravasal occlusion of blood vessels with titanic clips "Atrauclip" and "Ligaclip extra" was studied in order to reveal indications and contraindications to their use. Occlusion with the clips of both types was ineffective in vessels with a diameter of >7.0 mm. Arteritis or the presence of an ...
Kern P - - 2002
We report a case of a 37-year-old white woman, who presented with digital arterial occlusions associated with parvovirus B19 infection. Two other member of the family presented acute febrile illness, polyarthralgia (husband), and erythema infectiosum (son) during the same month. This new report gives weight to the concept that acute ...
Brandt Tobias - - 2002
Acute basilar artery (BA) occlusion is associated with an extremely high mortality. The pathogenesis in younger patients is usually embolism form cardiac sources or less frequently from vertebral artery dissection. Local atherothrombosis is more common in elderly patients. Differently to the carotid territory, for the vertebrobasilar territory there are no ...
Rockman Caron B - - 2002
Total occlusion of the contralateral internal carotid artery has often been considered to be a predictor of poor outcome after carotid endarterectomy (CEA) of ipsilateral carotid stenosis. Data from both the North American Symptomatic Carotid Endarterectomy Trial and the Asymptomatic Carotid Atherosclerosis Study have suggested this to be true. However, ...
Kaynak Kamil - - 2002
Three patients with arterial echinococcosis presented with chronic or acute arterial occlusion. One case diagnosed as Leriche's syndrome was found at surgery to have aortic occlusion caused by hydatid cysts; arterial reconstruction was performed by aortoiliac interposition of a woven Dacron vascular graft. In the other 2 cases presenting with ...
Palmer Nicholas D - - 2002
The X-SIZER thromboatherectomy catheter system (EndiCOR Medical, Inc.) was initially developed for the treatment of thrombus in acute coronary syndromes. We present the case of a 64-year-old man with thrombotic occlusion of the left circumflex coronary artery. Antegrade flow was restored by aspiration of platelet thrombus at the point of ...
Duncan I C - - 2002
Summary: Abciximab is one of a new class of platelet aggregation inhibitors that has to date been used mainly in the management of acute coronary ischaemic syndromes or during cardiac intervention for the prevention and treatment of acute vessel occlusion during and after angioplasty or stent placement. More recently, it ...
Urbach H - - 2002
Little is known about whether recanalization of carotid territory occlusions by local intra-arterial thrombolysis (LIT) depends on the type of the occluding thromboembolus. We retrospectively analysed the records of 62 patients with thromboembolic occlusions of the intracranial internal carotid artery (ICA) bifurcation or the middle cerebral artery who were undergoing ...
Piscione Federico - - 2002
Eighty-three consecutive patients with 85 coronary total occlusions undergoing coronary angioplasty were retrospectively studied. Patients were divided into two groups according to the occlusion age that was < 30 days (subacute total occlusion [STO]: 25 patients; range 1-30 days) or > 30 days (chronic total occlusion [CTO]: 58 patients; range ...
Hilger Thomas - - 2002
Magnetic resonance angiography (MRA) was performed in a thromboembolic stroke model of the rat to characterize intracranial vessel occlusion patterns and to test its predictive power for tissue recovery after recombinant tissue plasminogen activator (rt-PA) treatment. After rt-PA-treated selective middle cerebral artery (MCA) occlusion, full recanalization was observed in two ...
Cornelissen B P M - - 2002
In this study the potential role of circulatory disturbances in the pathogenesis of sesamoiditis was investigated by studying the clinical and histological effects of experimental occlusion of the sesamoidean artery, which is the main nutrient artery of the proximal sesamoid bone (PSB). For this purpose, five adult Dutch Warmblood horses ...
Dovjak Neda - - 2002
The rate of secretion of t-PA from vascular endothelial cells has been proposed as a good marker of endothelial function. Our aim was to measure the rate of in vivo t-PA antigen release from the human brachial artery and not from the combined vascular pool of the upper extremity. In ...
Rao Jayasree - - 2002
It is usually considered that occlusion of a nondominant right coronary artery is not associated with significant consequences. We report two cases of nondominant right coronary artery occlusion that presented with sudden cardiac death. Timely intervention resulted in complete resolution of the ventricular arrhythmias. This highlights the need for greater ...
Bertolotto Michele - - 2002
Our objective was to investigate prevalence and Doppler characteristics of penile cavernosal-spongiosal communications (CSC). These vessels are either anastomoses connecting the cavernosal arteries with the urethral arterial network or afferent vessels to the corpus spongiosum. Sixty-one consecutive patients underwent penile color Doppler US. Waveform changes in CSC were evaluated in ...
Steele J G - - 2002
For many dentists, occlusion carries an air of mystique. It even seems sometimes that a perverse pleasure is derived in making the whole subject more complicated than it really is. As a clinician, you need to be able to decide what you expect from your proposed restoration, and to identify ...
Kozak Matija - - 2002
For 13 patients with subacute and 4 patients with chronic occlusion, magnetic resonance imaging (MRI) of occlusive arterial thrombi in the superficial femoral artery were performed in vivo. The patients with subacute occlusion were treated with catheter-directed thrombolysis. The frequency of MR signal intensity and its distribution in thrombi were ...
Derex L - - 2002
The presence of a thrombus on initial arteriography is directly related to the baseline NIHSS score. Magnetic resonance angiography (MRA) offers a noninvasive and rapid assessment of large cerebral vessel patency. We aimed at evaluating (1) the baseline NIHSS score as a tool for predicting the likelihood of an occluded ...
Bracke F A L E - - 2002
AIMS: Occlusion of the subclavian vein resulting from pacemaker leads prohibits insertion of new leads. We describe the ipsilateral insertion of a new lead without extracting the old lead using a laser sheath in a pacemaker patient with an obstructed vein. METHODS AND RESULT: A laser sheath together with an ...
Doshi S N - - 2001
Flow-mediated dilatation (FMD) of the brachial artery assessed by high-resolution ultrasound is widely used to measure endothelial function. However, the technique is not standardized, with different groups using occlusion of either the wrist or the upper arm to induce increased blood flow. The validity of the test as a marker ...
Svedjeholm R - - 2001
Acute occlusion of the left main coronary artery (LMCA) is a rare and almost invariably fatal condition. Here, we report on heart salvage in two such cases with CABG aided by emergent retrograde reperfusion as the initial operative step. Both cases were extremely unusual. The first patient had twice survived ...
Formigari R - - 2001
The midterm follow-up of 2 patients with left ventricle-to-aorta conduit who underwent percutaneous closure with the Amplatzer device is described. Complete occlusion was achieved immediately in 1 patient. In the other patient, a trivial residual shunt was still present after 12 months, but disappeared after 18 months. Occlusion of dysfunctional ...
Shodadai S P - - 2001
PURPOSE: The aim of this clinical study was to evaluate if an arbitrary facebow registration and transfer provides significant advantages for the fabrication of an occlusal appliance in comparison with the omission of such a procedure. MATERIALS AND METHODS: For 20 fully dentate adult patients diagnosed with bruxism, two Michigan ...
Pohl T - - 2001
OBJECTIVE: To assess the effect of recanalisation on collateral flow in a case-control study in patients with and without chronic total coronary occlusions. DESIGN: In 54 patients undergoing percutaneous transluminal coronary angioplasty (PTCA) (mean (SD) age 61 (6) years), coronary collateral flow was measured by intracoronary pressure or Doppler guide ...
Gershlick A H - - 2001
Thrombolysis has reduced mortality from myocardial infarction, but effective opening of the artery with normal flow continues to be an important goal. Thrombolysis is not always as successful as it should be; alternatives include adjunctive therapy and mechanical opening of the arteries. In patients with acute coronary occlusion opening the ...
Greve G - - 2001
Abnormal loading and distension of the right ventricle may induce arrhythmia through the process of mechanoelectrical feedback. Nonetheless, the electrophysiological effects of right ventricular distension are ill-defined and the mechanisms which underpin mechanoelectrical feedback in the right ventricle are unknown. We examined the effects of changes in right ventricular load ...
Yilmaz S - - 2002
We present a successful case of percutaneous intentional extraluminal recanalization (PIER) of bilateral long superficial femoral artery (SFA) occlusions and a long iliac artery occlusion through ultrasound-guided retrograde popliteal artery punctures. To our knowledge, PIER of SFA occlusions via popliteal approach has been reported in only three cases, and subintimal ...
Speel T G - - 2001
The purpose of this work was to assess whether a single intracavernous injection (ICI) of a low dose of the combination of papaverine-phentolamine is replaceable by a high dose of the oral erectogenic agent sildenafil as mode of stimulation during pharmaco-penile duplex ultrasonography (PPDU). Eleven patients with complaints of erectile ...
Besselmann M - - 2001
Contrast agent free time-of-flight magnetic resonance angiography (TOF-MRA) was applied to the intraluminal thread occlusion model of experimental stroke in rat. It was combined with perfusion- and diffusion-weighted imaging (PWI and DWI) sequences to correlate occlusion and reopening of the middle cerebral artery with alterations in these well-established magnetic resonance ...
Hackenberg L - - 2001
We report on a case of occlusion of the left common iliac artery due to arteriosclerosis and consecutive thrombotic occlusion of the left popliteal artery in a 52-year-old man following anterior retroperitoneal interbody fusion of L4--S1. Initial symptoms included leg pain and numbness of the lateral shank, which were thought ...
Akins P T - - 2001
Based on published case series, intra-arterial thrombolysis for basilar artery occlusion reduces mortality and improves outcome even when performed after considerable delays. In contrast, the current use of intravenous thrombolysis is limited to a 3-hour time window. The longer time window for intervention in patients with basilar artery occlusion may ...
Cejna M - - 2001
PURPOSE: Retrospective analysis of the results of rt-PA thrombolysis in the treatment of acute thromboembolic occlusion of the upper limb. METHODS: Of 55 patients with demonstrated acute embolic arterial occlusion, rt-PA thrombolysis was performed on 40 occlusions in 38 patients (23 women with a mean age of 62 years, range ...
Sallam M - - 2001
The objective of this study was to highlight the incidence and predictors of re-occlusion after successful recanalization of chronic total coronary occlusions. Following successful recanalization and stent implantation in 716 coronary lesions (665 patients) with chronic total occlusion, four hundred and five (56.6%) lesions (375 patients) underwent repeat angiography within ...
Perin E C - - 2001
Chronic total occlusions in particular, completely obstructed aorto-ostial lesions are among the most challenging targets in interventional cardiology. Excimer laser is a debulking technology for revascularization of complex lesions. Treatment of total occlusions with laser angioplasty can be applied providing that a guidewire traverses the entire length of the occlusion ...
Panahian N - - 2001
Use of rodent models of hippocampal neurodegeneration are recommended for use in studies to understand the pathophysiology and molecular mechanisms involved. This unit includes protocols for two-vessel occlusion, three-vessel occlusion, and permanent bilateral vertebral artery occlusion plus methods for histological techniques for preparation of brain tissue and analysis of hippocampal ...
Clark J R - - 2001
The features that constitute an "ideal" functional occlusion have not been conclusively established. Orthodontic treatment has the capacity to change static and functional occlusal relationships fundamentally. In this article, we present the evidence on which features of the occlusion are reported to be detrimental to the teeth and masticatory system ...
Chinn S B - - 2001
OBJECTIVE: This study determined the effect of vascular occlusion on radiofrequency lesion shape, volume, and temperature in a porcine liver model. SUBJECTS AND METHODS: Radiofrequency lesions (n = 33) were created in the livers of six domestic pigs in vivo using a multiprong radiofrequency electrode. Lesions were randomly assigned to ...
Westgate J A - - 2001
OBJECTIVE: To assess the clinical utility of overshoot fetal heart rate (FHR) decelerations by examining their occurrence after umbilical cord occlusions of varying frequency and length in near-term fetal sheep. METHODS: Fetuses were allocated to the following three groups: 1-minute umbilical cord occlusion repeated every 5 minutes (1:5 group, n ...
Schmidt O - - 2001
We report a case of spontaneous iliac occlusion in a 44-year-old male patient after long-distance running. Atherogenic risk factors like hypertension, diabetes, hypercholesterolemia and smoking were missing. Spontaneous iliac occlusion is extremely rare and only a few cases have been documented. Angiography showed occlusion of the left iliac artery with ...
Niwa M - - 2001
The involvement of nitric oxide synthase (NOS) in ischemia was evaluated by detecting the expression of neuronal NOS (nNOS), endothelial NOS (eNOS), and inducible NOS (iNOS) by the immunohistochemical method in the rat model of middle cerebral artery (MCA) occlusion. Transient MCA occlusion (2 hours) was induced in 32 male ...
Nehme Omar S. - - 2001
Small bowel ischemia is a relatively uncommon disorder requiring prompt recognition and aggressive management if significant morbidity and mortality are to be averted. The pathophysiology of the ischemic event usually will determine the management approach used. Factors to be considered include whether the ischemia is the consequence of arterial or ...
Nishida T - - 2001
OBJECTIVE: To assess the impact of the occlusion duration on the characteristics of coronary occlusive plaques. BACKGROUND: The percutaneous recanalization of chronic total coronary occlusions is a technically demanding and yet often unsuccessful procedure due to unfavorable morphological changes described by histology but not well defined in vivo. METHODS: Thirty-five ...
Stanson A W - - 2001
The purpose of this study was to review the positive angiographic findings in patients with polyarteritis nodosa (PAN). The authors reviewed the angiograms of 56 consecutive patients (25 women and 31 men; age range, 18-81 years; mean age, 55 years) with PAN and arterial abnormalities consistent with necrotizing vasculitis. Aneurysms ...
Scholz D - - 2001
The formation of collateral arteries as a process adaptive to arterial occlusion is now called 'arteriogenesis' to emphasize the difference to angiogenesis, the formation of capillaries by sprouting from pre-existent ones (W. Schaper, I. Buschmann. Cardiovasc Res 1999; 43: 835-7; I. Buschmann, W. Schaper. J Pathol 2000; 190: 338-42; D. ...
Wilson J - - 2000
STATEMENT OF PROBLEM: There has been debate about which anteroposterior maxillomandibular relationship should be used in fixed and removable prosthodontics for patients without a definite maximal intercuspation. The choice has important implications for complete denture fabrication in which any guidance to the previous dentulous maximal intercuspal position is missing. PURPOSE: ...
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