Search Results
Results 551 - 600 of 1206
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Jones J G - - 2000
There is an extensive literature on methods for discriminating between an increased shunt and a reduced ratio of ventilation to perfusion. In this review we prefer the terms "VA/Q" and "reduced or low VA/Q" rather than "V/Q inequality" to refer to the effects on arterial oxygenation of reducing V/Q below ...
Ichida F - - 1999
The purpose of this study was to assess the capability of multiplanar cine magnetic resonance imaging (MRI) for evaluating pre- and post-operative pulmonary circulation in patients with pulmonary atresia and severe pulmonary stenosis. Seventy-three multiplanar cine MRIs were performed in 30 patients, aged 1 month to 7 years (mean age, ...
Hoyer M H - - 1999
A 15-year-old girl with previous repair of a complex cyanotic congenital heart defect had persistence of a modified left Blalock-Taussig shunt that could not be ligated at surgery. Six years later, antegrade delivery of a Gianturco-Grifka Vascular Occlusion Device resulted in complete closure of the shunt. Cathet. Cardiovasc. Intervent. 48:365-367, ...
Haskal Z J - - 1999
PURPOSE: To determine whether polytetrafluoroethylene (PTFE) stent-grafts yield longer patency for creation or revision of transjugular intrahepatic portosystemic shunts (TIPS). MATERIALS AND METHODS: Fourteen PTFE-covered Wallstents were placed in 13 patients with TIPS: seven at shunt creation and seven during revision of TIPS with one to five prior thromboses at ...
Herry I - - 1999
This report presents the case of a 73 yr-old female in whom kyphoscoliosis, osteoporotic vertebra compression fractures and sternal injury resulted in severe respiratory failure and hypoxaemia. Pulmonary function testing showed moderate restrictive pattern and rare mismatches were found on lung ventilation/perfusion scanning. Transoesophageal echocardiography with contrast studies showed abnormal ...
Boigner H - - 1999
Today some authors consider univentricular repair a contraindication for postoperative cardiac extracorporeal membrane oxygenation (ECMO). The question is whether or not ECMO is indicated as pulmonary support in case of an overwhelming pulmonary infection during the postoperative course after a Norwood procedure. During the prolonged weaning period after a Norwood ...
Westra S J - - 1999
PURPOSE: To study whether electron-beam computed tomography (CT) is as accurate as conventional angiocardiography for the characterization of the true pulmonary arteries and the aortopulmonary collateral vessels in children undergoing surgical correction for pulmonary atresia. MATERIALS AND METHODS: Twenty-three children with pulmonary atresia underwent 48 cardiac-triggered dynamic contrast material-enhanced electron-beam ...
Kimura K - - 1999
We herein report the case of a patient who had paradoxical brain embolism owing to a pulmonary arteriovenous fistula (PAVF) who was diagnosed as having a right-to-left shunt by transcranial Doppler (TCD) with saline contrast medium. TCD with saline contrast medium failed to detect any high-intensity transient signals immediately after ...
Haskal Z J - - 1999
PURPOSE: To evaluate the biologic response to transjugular intrahepatic portosystemic shunts (TIPS) lined with polycarbonate urethane endografts and the effects of different porosity formulations. MATERIALS AND METHODS: Seventeen TIPS were created in non-modified portal hypertensive miniswine with use of porous (n = 6), nonporous (n = 7) polycarbonate urethane stent-grafts, ...
Sabri M R - - 1999
We performed a retrospective echocardiographic study in tetralogy of Fallot (TOF) or pulmonay atresia with ventricular septal defect (PA&VSD) to evaluate the effects of Blalock-Taussig shunt on branch pulmonary artery growth. There were 35 patients with TOF and 11 with PA&VSD. We measured the right and left pulmonary artery area ...
Pruckmayer M - - 1999
Glenn shunt and Fontan procedure, the most widely used surgical procedures in congenital heart anomalies, may be associated with abnormal pulmonary blood flow patterns and the development of pulmonary arteriovenous fistulae. METHODS: This study quantified pulmonary and whole-body blood flow using the microsphere technique by sequential injection of 99mTc microspheres ...
Gangemi M - - 1999
BACKGROUND: Monoventricular hydrocephalus is usually treated with extrathecal shunting. However, today endoscopic fenestration of the septum pellucidum seems to be a very useful and less invasive technique. METHODS: Five patients with monoventricular hydrocephalus have been treated with neuroendoscopic techniques. In three cases with an excluded lateral ventricle due to contralateral ...
Yamada S - - 1999
Although arteriovenous malformations (AVMs) have been known to have direct communications between arteries and veins without interposing capillaries, the exact location of arterial and venous junctions have not been defined. Utilizing microscopic and endoscopic observations, Yamada and associates identified shunting arterioles (50 mu-250 mu) directly connected to the AVM core ...
Tan K L - - 1999
An elderly woman presented with unexplained, intermittent hypoxaemia unrelated to posture. Subsequent investigations revealed intermittent and variable right-to-left interatrial shunting through a patent foramen ovale in the presence of normal pulmonary arterial and intracardiac pressures, caused by right atrial compression from a horizontal, elongated ascending aorta. Surgical closure of the ...
Patakas D - - 1999
A patient with a large hydatid cyst of the liver developed a positionally symptomatic right to left shunting across a patent foramen ovale with both platypnoea and orthodeoxia, despite normal pulmonary arterial pressures and normal pulmonary function tests. When the patient was in the supine position the calculated right to ...
Imoto Y - - 1999
In the Norwood procedure for hypoplastic left heart yndrome, the distal descending thoracic aorta was cannulated just superior to the diaphragm through median sternotomy. In combination with cerebral perfusion through the graft anastomosed to the innominate artery, which was used as a systemic-to-pulmonary shunt later, this technique enabled us to ...
Miyake H - - 1999
We analyzed current treatment for hydrocephalus in Japan by means of a nationwide questionnaire. Ventriculoperitoneal (VP) shunting was the most common form of cerebrospinal fluid (CSF) shunting, and in 66% of cases the ventricular catheter was inserted via the anterior horn. Various types of flow-control valves were used in 46% ...
Hosoda K - - 1999
BACKGROUND: Extracranial internal carotid artery aneurysms (EICAA) are rare lesions. Resection and grafting is the preferred method of management. However, the details of shunt use in surgery for this type of aneurysm has been described in few articles. We describe an external-internal shunt with intra-aneurysmal trans-orifice insertion. CASE REPORT: A ...
Droupy S - - 1999
OBJECTIVES: The reality of cavernospongious shunts has never been confirmed and their role in penile erection remains undetermined. We aim to describe the intrapenile vascular anatomy as the precise nature of the connections between the corpus spongiosum, the glans and the corpora cavernosa remains unknown. METHODS: Ten human penises were ...
Wildberger J - - 1999
RATIONALE AND OBJECTIVES: To evaluate the feasibility of mechanical thrombectomy in occluded hemodialysis access shunts by using a newly developed 5F pigtail rotation catheter. METHODS: Thrombosed hemodialysis access shunts were simulated by clotted bovine blood in silicone tubing (diameter 6 mm). After retrograde and antegrade sheath placement (6F), mechanical fragmentation ...
Yavuzgil O - - 1999
BACKGROUND: Thrombus formation around the intracardiac end of the catheter, thromboembolism, and infection are the most important and life-threatening complications of ventriculoatrial shunts. In this article we report a patient with a large right atrial mass that was diagnosed by 2-D echocardiogram and removed via standard median sternotomy and cardiopulmonary ...
Wain R A - - 1999
BACKGROUND: Selective shunting during carotid endarterectomy is widely performed, but the optimal approach for predicting when a shunt is unnecessary remains uncertain. We evaluated the ability of preoperative cerebral angiography to predict when carotid endarterectomy could be safely performed without a shunt. STUDY DESIGN: Eighty-seven patients undergoing carotid endarterectomy between ...
Rumi M N - - 1999
Transjugular intrahepatic portosystemic shunt has become an accepted intervention to treat sequelae of end-stage liver disease such as refractory ascites and esophageal varices for patients awaiting liver transplantation. Technical difficulties in such patients at the time of transplantation are usually limited to malpositioning of the stent requiring modification of the ...
Murthy K S - - 1999
BACKGROUND: We report novel techniques of performing bidirectional Glenn shunt (BDG) without cardiopulmonary bypass (CPB). METHODS: Five cases of single ventricle and pulmonary stenosis (PS) complex were taken up for BDG without CPB. The criteria for case selection were an unrestrictive atrial septal defect (ASD), no atrioventricular (AV) valve regurgitation, ...
Droste D W - - 1999
BACKGROUND AND PURPOSE: Cardiac right-to-left shunts can be identified by transcranial Doppler ultrasound (TCD) with the use of different contrast agents and by transesophageal echocardiography (TEE). Systematic data are available on neither the reproducibility of contrast TCD, the comparison of different contrast agents, nor the comparison of simultaneous bilateral to ...
Jahangiri M - - 1999
BACKGROUND: Although some pediatric cardiology departments have a policy of adopting primary correction of tetralogy of Fallot in all symptomatic infants, we and others still palliate neonates and infants. Effective palliation should ameliorate symptoms and allow growth of the pulmonary arteries. Although studies on the growth of the ipsilateral and ...
Deally C - - 1999
This is a unique report of systemic-to-pulmonary artery shunt thromboses secondary to primary antiphospholipid syndrome and antithrombin III deficiency in a neonate with cyanotic congenital heart disease. This infant with tricuspid atresia experienced thromboses of two modified Blalock-Taussig shunts en route to a bidirectional cavo-pulmonary shunt and potential future Fontan ...
Legras A - - 1999
The mechanisms leading to shunting through a patent foramen ovale include high right-sided cardiac pressures and respiratory factors due to mechanical ventilation and also anatomical changes in the right atrium as described in the platypnea-orthodeoxia syndrome. We report a patient with the adult respiratory distress syndrome (ARDS) who had a ...
Otal P - - 1999
PURPOSE: To assess whether the use of a prosthesis covered by a Dacron sheath might prevent pseudointimal hyperplasia in a transjugular intrahepatic portosystemic shunt (TIPS). MATERIALS AND METHODS: A TIPS procedure was performed in nine pigs, after creation of a portal vein microembolization model of portal hypertension, by using a ...
Andrews J D - - 1999
A 24-year-old woman with a history of unrepaired tetralogy of Fallot was scheduled to undergo laparoscopic cholecystectomy. Her significant history included tetralogy of Fallot with pulmonary atresia, hypoplastic left pulmonary artery, pulmonary vascular obstructive disease, a functioning right subclavian artery to right pulmonary artery shunt (modified Blalock-Taussig palliative procedure) with ...
Henderson J M - - 1999
In support of an in vivo investigation in swine of the influence of changes in fluid dynamic wall shear on arterial macromolecular permeability, a procedure has been developed to alter the flows in the porcine posterior arterial vasculature by opening and closing a reversible arteriovenous shunt placed on one of ...
Di Cataldo A - - 1999
The animals do not tolerate prolonged caval and/or portal clamping which induces negative pathophysiological events such as release of kinins, damage of the intestinal mucosa, and bacterial translocation. In human liver surgery, these problems have been solved by bio-pump for veno-venous bypass. In order to find a simple method to ...
Masetti P - - 1999
A 21-year-old white woman, born with a univentricular heart, had undergone staged procedures before Fontan correction. She then began to develop edema, protein-losing enteropathy, and ascites refractory to diuretic therapy. Cardiac angiography showed a patent right Blalock-Taussig shunt, with turbulent cavopulmonary circulation. After undergoing an unsuccessful attempt at coil embolization ...
Corno A F - - 1999
Determination of the proper length of the tubular prosthesis is a major issue when performing a systemic-pulmonary artery shunt. The procedure is simplified by using a prosthesis with accordionlike properties. This was demonstrated in 7 consecutive infants with complex congenital heart defects, in whom systemic-pulmonary artery shunts were placed without ...
Thompson R D - - 1999
STUDY OBJECTIVES: To assess the effectiveness of pulse oximetry and radioisotope measurement of right-to-left (R-L) shunt for the early detection of pulmonary arteriovenous malformations (PAVMs) in patients with hereditary hemorrhagic telangiectasia (HHT). DESIGN: Patients with HHT had serial measurements of the following: (1) arterial oxygen saturation (SaO2) by pulse oximetry ...
Boyvat F - - 1999
We report a 9-year-old male cirrhotic patient with acute occlusion of a transjugular intrahepatic portosystemic shunt (TIPS) due to a biliary-to-TIPS fistula which occurred 9 hr after the TIPS procedure. Immediate TIPS revision was performed and the fistula was treated by placement of an endoluminal stent-graft. At 12-month follow-up color ...
Schumacher J - - 1999
To evaluate the effect of a shunt created between the corpus cavernosum penis (CCP) and corpus spongiosum penis (CSP) on erectile and ejaculatory function of normal stallions and to verify persistence of the shunt. The capability of stallions to develop an erection and to ejaculate was evaluated before and after ...
Kehler U - - 1998
Third ventriculostomy for acquired non-communicating hydrocephalus is an excellent alternative to shunting procedures. Nevertheless, complications can be severe and even fatal (e.g., lesion of the basilar artery), especially if the floor of the 3rd ventricle is very tough and/or opaque. The authors describe a safe method of sharp perforation of ...
Haug E S - - 1998
Two patients developed chylous complications following abdominal aortic aneurysm repair. One patient had chylous ascitis and was successfully treated by a peritoneo-caval shunt. The other patient developed a lymph cyst, which gradually resorbed after puncture. Chylous complications following aortic surgery are rare. Patients in bad a general condition should be ...
Kawaguchi T - - 1998
OBJECTIVE: This study was conducted to determine whether a ventriculoperitoneal shunt alone was effective in treating subdural effusion with hydrocephalus. METHODS: Using only a ventriculoperitoneal shunt, we successfully treated eight patients who had subdural effusion with hydrocephalus after ruptured intracranial aneurysmal clipping, despite ventricular deformity and midline shift. RESULTS: For ...
Lucas W - - 1998
Ischemic colitis is a rare but serious consequence of long distance running. Herein we report a well documented case of severe ischemic colitis in an elite class marathon athlete in whom an extensive diagnostic evaluation, including magnetic resonance angiography and hypercoagulation profile, was performed. Our results suggest that physiologic shunting ...
Garabedian C P - - 1998
Four neonates with hypoplastic left heart syndrome (HLHS) were found to have innominate artery steal syndrome (IASS) following stage I palliation with a modified Blalock-Taussig (B-T) shunt. All patients presented in the early postoperative period with a persistent supplemental oxygen requirement. Two-dimensional echocardiography with Doppler flow analysis and cardiac catheterization ...
Bökenkamp R - - 1998
In neonates with pulmonary atresia and intact ventricular septum the aims of therapy are maintenance of pulmonary blood flow and right ventricular decompression in order to achieve right ventricular support of the pulmonary circulation. Recent developments in interventional heart catheterization with pulmonary radiofrequency-assisted balloon valvuloplasty and ductal stent implantation offer ...
Kanematsu M - - 1998
A case of an unusual form of hepatodiaphragmatic portosystemic shunt arising from the periphery of left posterosuperior portal vein branch, running beneath the inferior aspect of left hemidiaphragm and draining into the left lateral abdominal wall is demonstrated and assessed with digital subtraction portography, maximum-intensity-projection images reconstructed from helical CT ...
Plunkett M D - - 1998
The Norwood stage I procedure is often used for the initial treatment of infants with hypoplastic left heart syndrome. This procedure creates a systemic arterial to pulmonary artery shunt to establish pulmonary blood flow. We describe a method to facilitate placement of this shunt by attaching a polytetrafluoroethylene shunt to ...
Coren M E - - 1998
The modified Blalock-Taussig shunt is commonly performed as early palliation in cyanotic congenital heart disease. To highlight unusual diagnostic problems in such patients, two cases are reported in whom shunt complications were initially diagnosed as lobar pneumonia and tuberculosis, respectively. The children, an 8 month old boy and a 3 ...
Ito T - - 1998
We studied the change in pulmonary arterial diameter under prostaglandin E1 (PGE1) therapy in infants with ductus-dependent cyanotic heart disease (pulmonary atresia). Ten infants undergoing administration of PGE1 for more than 2 weeks were selected for this study. A classic Blalock-Taussig (BT) shunt was performed in seven patients and a ...
Kessler D J - - 1998
In a series of 14 patients undergoing transseptal catheterization for ablation of left-sided accessory pathways, hydrogen appearance time was used to detect left-to-right shunting after removal of the catheter. Six of the 12 patients who had no evidence of shunt before catheterization had evidence of shunting after the procedure.
Godart F - - 1998
BACKGROUND: The aim of this study was to assess by angiography the late effects of both classic and modified Blalock-Taussig shunts in terms of growth and development of stenosis and distortion. METHODS: At a mean of 51 months postoperatively, we retrospectively reviewed the results in 78 patients who underwent creation ...
Hausegger K A - - 1998
Three patients with dialysis access graft shunts, having a symptomatic pseudoaneurysm and a hemodynamically significant stenosis at the anastomosis between the graft shunt and the subclavian vein, were treated with percutaneous transluminal angioplasty and insertion of a Wallstent. Pseudoaneurysms were excluded by percutaneous insertion of a Cragg Endo-Pro stent-graft with ...
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