Search Results
Results 401 - 450 of 1200
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Smith M V - - 1999
BACKGROUND: In clinical practice pulmonary artery balloon counterpulsation (PABC) has been utilized only in the operative setting with the balloon housed in a graft attached to the pulmonary artery. Clearly, percutaneous insertion of a dedicated pulmonary artery balloon is a desirable goal for patients requiring temporary assist for right ventricular ...
Hsu DT - - 1999
Congenital aortic stenosis is characterized by narrowing of the aortic valve orifice, leading to left ventricular hypertrophy and predisposing the patient to exercise intolerance and myocardial dysfunction. Careful monitoring is essential because of the progressive nature of this lesion. Balloon valvuloplasty is the procedure of choice as intermediate palliation for ...
Gershony G - - 1999
Purpose of this paper is to investigate the hemostatic capabilities of a novel vascular sealing device consisting of a balloon catheter and procoagulant. Vascular sheaths were placed percutaneously in the femoral arteries of dogs. The sealing device was evaluated using the balloon catheter alone in 6 femoral arteries and with ...
Ruiz C E - - 1999
The risk of left ventricular perforation is a rare but well-recognized complication of percutaneous double balloon mitral valvuloplasty that usually requires surgical bailout. We describe a case of left ventricular perforation with cardiac tamponade, caused by the propulsion of the balloons during balloon mitral valvotomy on an 86-year-old female with ...
Sakurai H - - 1999
The case of an 8-month-old boy with aortic dissection caused by intraaortic balloon pumping is reported. The balloon was inserted during an operation for the anomalous origin of the left coronary artery. It is important to realize the potential risk of aortic dissection even in infants and to select an ...
Babatasi G - - 1999
Short-term balloon counterpulsation may be complicated by aortic balloon entrapment. We report a patient in whom video-coronary surgery was performed using beating heart anastomosis. This patient developed intra-aortic balloon (IAB) entrapment 4 days after initiation of the counterpulsation previously implanted for a preoperative low ejection fraction. No limb ischaemia was ...
Hartmann A - - 1999
A 49-year-old woman presenting with recurrent, reversible brainstem symptoms and a distal basilar artery aneurysm underwent balloon test occlusion. Five minutes after balloon inflation she developed a reversible isolated dysarthria. Despite failing the test occlusion (and after an additional brainstem event), the patient underwent surgery with placement of a clip ...
Levine A B - - 1999
OBJECTIVE: To describe our experience with the use of prophylactic pelvic artery balloon catheters in cases of placenta accreta diagnosed by antenatal ultrasound and to compare these cases with contemporary controls. METHODS: In this prospective study, all patients seen at our institution between January 1994 and August 1997 with the ...
Sugiyama M - - 1999
BACKGROUND: Endoscopic papillary balloon dilation for treatment of bile duct stones is likely to preserve papillary function. However, endoscopic papillary balloon dilation may affect gallbladder motility. We investigated the effects of endoscopic papillary balloon dilation on gallbladder motility. METHODS: Ten patients with an intact gallbladder (six with and four without ...
Rao P S - - 1999
Although immediate and intermediate-term results after balloon dilatation of congenital stenotic lesions of the heart in children are well studied, long-term results have not been documented. Therefore, we reviewed our experience along with the limited published data to address this issue. Late follow-up after balloon pulmonary and aortic valvuloplasty shows ...
Yang L Y - - 1999
BACKGROUND: Prolonged intravenous infusions of recombinant tissue factor pathway inhibitor (rTFPI) have been shown to attenuate markedly neointimal formation and stenosis after balloon-induced injury to the carotid arteries in minipigs. DESIGN: Because local delivery of rTFPI to the injury site would be clinically advantageous, we designed this study to compare ...
Ormiston J A - - 1999
We aimed to determine the effects of simulated stent side-branch dilatation and subsequent redilatation of the central lumen. Following coronary stent implantation it may be necessary to dilate through the side of a stent to maintain branch patency. Branch dilatation through the side of 3.5-mm-diameter stents (AVE GFX, beStent, Crown, ...
Trumble D R - - 1999
BACKGROUND: Options for management of acute right ventricular (RV) failure are limited. This report describes preliminary testing of a temporary RV assist device that acts by direct compression of the RV. The system comprises a pancake-shaped silicone balloon (5 cm diameter) connected to a drive console that delivers a 65-mL ...
Karthik R - - 1999
A child presented with symptoms of compromise to cerebral blood flow and cardiac failure. On diagnostic angiography, he was found to have a discrete coarctation and related ostial stenosis of the left subclavian artery, which acted as the sole source of cerebral blood flow. The subclavian lesion was initially dilated ...
Oesterle S N - - 1999
A coaxial catheter system for containment of distal embolization is described. Utilizing a novel 0.014" hypotube with a distal elastomeric occlusion balloon, the PercuSurge GuardWire functions as a guidewire while trapping distal embolization resulting from more proximal intervention. The particulate debris is evacuated with a single operator exchange aspiration catheter ...
Roy S - - 1999
PURPOSE: To compare in an animal model of deep vein thrombosis, an intramural drug delivery catheter, the nipple-balloon catheter, with an occlusion balloon-infusion guide wire system. MATERIALS AND METHODS: Ten juvenile pigs were used for the study. Deep vein thrombosis was induced in both hind limbs by using a previously ...
Masaryk T J - - 1999
We describe a relatively unusual case of carotid cavernous fistula in association with a persistent trigeminal artery, presumably related to aneurysm rupture near the carotid origin of the vessel. We emphasize the use of a second, nondetachable balloon solely for the purpose of stabilizing placement of the first device at ...
Tyagi S - - 1999
Balloon angioplasty followed by stenting of the thoracic aorta is reported in a 5-year-old girl with Takayasu's arteritis, who presented with severe hypertension and congestive heart failure. Her aortogram showed severe long segment stenosis of the descending thoracic aorta, which was successfully treated by balloon angioplasty on two occasions, but ...
Patel A A - - 1999
A 15-year-old boy with severe pulmonary stenosis associated with severe right and left ventricular systolic dysfunction is reported. After successful percutaneous pulmonary valvuloplasty, there was an initial and early improvement in right ventricular (RV) function, followed by a delayed and more gradual improvement in left ventricular (LV) function. At long-term ...
Wang J K - - 1999
This study was conducted to investigate the outcome of balloon valvuloplasty for critical pulmonary stenosis in young infants. During a 6.2-year period between January 1992 and February 1998, 34 infants with critical pulmonary stenosis, aged 1 to 58 days (16.8+/-16.6 days), underwent attempted balloon valvuloplasty in this institution. The procedure ...
Meyers P M - - 1999
BACKGROUND AND PURPOSE: Temporary balloon occlusion has become a routine and medically accepted technique for the management of patients with aneurysms or intracranial or head/neck tumors. We describe our experience using a nondetachable silicone balloon (NDSB) catheter in 103 endovascular temporary balloon occlusions of the internal carotid artery, with attention ...
Pihkala J - - 1999
Over the past decade, transcatheter interventions have become increasingly important in the treatment of patients with congenital heart lesions. These procedures may be broadly grouped as dilations (e.g., septostomy, valvuloplasty, angioplasty, and endovascular stenting) or as closures (e.g., vascular embolization and device closure of defects). Balloon valvuloplasty has become the ...
Joseph G - - 1999
Transjugular balloon pulmonary valvuloplasty was safely and successfully performed in five patients, two of whom had severe right heart failure. Crossing the stenotic pulmonary valve from the right internal jugular vein was consistently easy and quick. This approach should be considered whenever difficulties are experienced or anticipated in the femoral ...
Miyazaki M - - 1999
We investigated the effect of an angiotensin (Ang) II antagonist, (+/-)-1-(cyclohexyloxycarbonyloxy)-ethyl 2-ethoxy- 1- [[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]- 1H-benzimidazole-7-carboxylate (TCV-116), on neointima formation in dog artery injured by a balloon catheter. Dogs were orally treated with 10 mg/kg TCV-116 or placebo twice a day for 5 weeks. After treatment with these drugs for 1 ...
Hofbeck M - - 1999
Balloon dilatation of critical pulmonary valve stenosis in neonates with a weight of less than 2.5 kg is associated with specific problems, including temperature loss during the procedure, venous access, and problems related to the small size of the cardiac structures. We report our experience with balloon valvuloplasty in a ...
Bosmans J M - - 1999
The aim of this study was to evaluate whether vascular remodeling and neointimal thickening occur after balloon dilatation of the nonatherosclerotic rabbit carotid artery, and whether both processes are influenced by continuous perivascular delivery of L-arginine or the nitric oxide synthase inhibitor NG-nitro-L-arginine methyl ester (L-NAME). In the first experiment, ...
Melliere D - - 1999
Combined balloon angioplasty and conventional revascularization are occasionally performed but some points are still controversial: which patients are eligible for this associated procedure?; should the procedures be performed simultaneously or successively?; and in case of simultaneous procedure, which one should be performed first? To answer these questions, the notes of ...
Kwan T - - 1999
Previous studies using intracoronary electrocardiography have demonstrated that ST-T alternans can develop during standard balloon coronary angioplasty. Total occlusion with a large amount of myocardium in jeopardy is the postulated prerequisite. In this study, the authors used perfusion balloons instead of standard balloons, so coronary perfusion was maintained and ischemia ...
Taylor F C - - 1999
Balloon occlusion hepatic venography using carbon dioxide (CO2) is proposed as a safer yet simpler alternative to wedged catheter techniques that have caused hepatic lacerations during the transjugular intrahepatic portosystemic shunt (TIPS) procedure. The image quality of CO2 wedged catheter and balloon occlusion venograms was comparable in our small series, ...
Timmis S B - - 1999
Angiographic studies have demonstrated that perfusion balloon percutaneous transluminal coronary angioplasty (PTCA) may result in modestly improved luminal gains and fewer major dissections than conventional balloon PTCA. However, intracoronary ultrasound (ICUS), which is more sensitive than angiography in evaluating the incidence, extent, and severity of dissection, was not used. We ...
Ramaswami G - - 1999
PURPOSE: To examine the feasibility and utility of ultrasound-guided angioplasty for treating lower limb stenoses. METHODS: Duplex ultrasonography was employed to guide 55 balloon dilation procedures (27 iliac, 26 superficial femoral, 1 profunda, and 1 vein graft) with the help of a special ultrasound catheter (EchoMark). Ultrasound was used to ...
Xu L - - 1999
The present study examined the temporal responses and the efficacy of 192Ir-HDR endovascular irradiation for preventing smooth muscle cell proliferation of rabbit iliac arteries after PTA with a cutting balloon catheter. Endovascular irradiation with 12 Gy was randomly performed on the one side of iliac arterial segment with the unirradiated ...
Massoud I - - 1999
Balloon dilation of the pulmonary valve was performed in 54 patients with tetralogy of Fallot with severe cyanosis, high haematocrit and severe valvar pulmonary stenosis. Clinical, echocardiographic, angiographic, and haemodynamic data were analyzed before and after the procedure. After balloon dilation, the systemic oxygen saturation increased from a mean value ...
Gotsman MS - - 1999
The Cutting Balloon consists of a standard balloon dilatation catheter with four microtome-sharp blades that incise the plaque and minimize arterial wall trauma. It was used in 31 patients; nine had calcified arteries, ten had non-compliant lesions, three had in-stent restenosis and nine had aorto-ostial lesions. Seventeen lesions were predilated, ...
Heusch A - - 1999
Balloon valvoplasty was undertaken in 27 patients with tetralogy of Fallot for first-stage palliation. Indications were arterial saturation of oxygen < 80%, hypoxic spells and duct-dependant pulmonary perfusion. The dilation was performed following diagnostic heart catheterization. Saturations improved from 75% +/- 8.5 before valvoplasty to 85% +/- 8.4 after the ...
Arab S M - - 1999
Fifteen patients requiring palliation for tetralogy of Fallot were treated by balloon dilation because of hypercyanotic spells. The mean age at dilation was 1.9 +/- 0.7 years (range 0.5-3), and the mean weight 9.8 +/- 2.1 kg (range 6.0-13.5). Dilation of the outflow tract was combined with dilation of the ...
Nakanishi T - - 1999
Previous reports regarding intravascular ultrasound (IVUS) imaging of the pulmonary arteries in children and its application to balloon pulmonary angioplasty are limited. This study was designed to compare findings of IVUS imaging and those of angiography of the pulmonary artery before and after the balloon angioplasty procedure. Thirty patients had ...
Brossmann J - - 1999
PURPOSE: To test the percutaneous introducibility of the expandable vascular sheath (EVS) system and the safety of percutaneous balloon-assisted thrombectomy. METHODS: The EVS was inserted directly (n = 9) or through a 9.5 Fr regular vascular introducer sheath (n = 9) into the femoral arteries and veins and carotid arteries ...
Uchino A A Dept. of Radiology, Saga Medical School; Saga, Japan - - - 1998
We treated a 70-year-old man with a giant paraophthalmic region aneurysm of the right internal carotid artery using the parent artery occlusion technique with three detachable balloons. Initially, the patient did well, but migration of the distal balloon into the aneurysm was detected seven months later. This report suggests that ...
Deprest J A - - 1998
OBJECTIVE: Intra-uterine tracheal occlusion has been proposed to reverse pulmonary hypoplasia, an important prognostic factor in congenital diaphragmatic hernia. We aimed to evaluate the feasibility and pulmonary effects of tracheoscopic tracheal obstruction with a detachable balloon. STUDY DESIGN: Fourteen mid-trimester fetuses out of 24 in 13 ewes underwent tracheoscopic balloon ...
Nomori H - - 1998
We developed balloon dilation for bronchial stenosis via minitracheostomy. The balloon catheter was introduced via minitracheostomy into the stenotic bronchus. The balloon was inflated 4 hours per day. We conducted this procedure for a tuberculous cicatric stenosis of the left lower lobe bronchus. The bronchus was sufficiently dilated after eight ...
Rao P S - - 1998
BACKGROUND: The results of immediate and short term follow up of balloon dilatation of the pulmonary valve have been well documented, but there is limited information on long term follow up. OBJECTIVE: To evaluate the results of three to 10 year follow up of balloon dilatation of the pulmonary valve ...
Hadjimiltiades S - - 1998
Coronary perforation can be managed with prolonged balloon inflations, covered stents, or embolization of the vessel. We report on a case of a balloon-induced perforation of the distal left anterior descending artery, that was sealed by injecting preclotted autologous blood through the balloon catheter lumen at the site of the ...
Kwon H M - - 1998
OBJECTIVES: The objective of this study was to examine the quantitative response of the adventitial vasa vasorum to balloon-induced coronary injury. BACKGROUND: Recent attention has focused on the role of vasa vasorum in atherosclerotic and restenotic coronary artery disease. However, the three-dimensional anatomy of these complex vessels is largely unknown, ...
Yokouchi T T The Second Department of Neurosurgery, Toho University School of Medicine; Tokyo, - - 1998
We performed balloon dilatation in the carotid artery of WHHL rabbits and examined subsequent morphological alteration over time. The balloon was inserted as far as the carotid bifurcation and observations were made on the morphological alteration after dilatation in the atherosclerotic intimal thickening from immediately after balloon dilatation over a ...
Dev N B - - 1998
Current methods of local drug delivery frequently fail to achieve a prolonged therapeutically effective tissue drug level without producing vascular trauma. A novel double-balloon catheter system, incorporating electroporation technology, has been designed and tested to deliver heparin into rabbit carotid arteries in an overstretch balloon injury model in vivo. Following ...
Hung JS - - 1998
Recently, the shape of the J-tipped stylet used in Inoue balloon mitral valvuloplasty has been altered to form a tighter loop. Consequently, the distal balloon catheter tends to take a more vertical orientation when the stylet is inserted into the catheter during manipulation of the balloon catheter across the mitral ...
Jenkins M P - - 1998
OBJECTIVES: To test the hypothesis that intravascular light could be delivered via a balloon catheter for arterial photodynamic therapy (PDT). DESIGN: Pig non-injury model. MATERIALS: Clinical catheter equipment. METHODS: Large White pigs (15-20 micrograms) were photosensitised with 5-aminolaevulinic acid (5-ALA) induced protoporphyrin IX (PpIX) at a concentration of 120 mg/kg. ...
Rao P S - - 1998
Balloon aortic valvuloplasty is an acceptable alternative to surgery in the treatment of critical aortic stenosis in the neonate. In this report, we describe a 1-day-old infant with critical aortic stenosis who was successfully treated with an anterograde, transumbilical venous, snare-assisted balloon aortic valvuloplasty. Based on this experience, it is ...
Friedrich R E - - 1998
OBJECTIVE: To study the patency rates of anastomoses in damaged common carotid arteries in a training model of microvascular surgery (Wistar rats). MATERIAL AND METHODS: Under general anaesthesia with xylazine (Rompun) and ketamine (Ketanest) balloon dilatation was repeated five times in 31 left common carotid arteries of female Wistar rats. ...
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