bluuebunny/crossref_metadata_2025_split huggingface dataset:
Assessment of transplant arteriopathy by intracoronary two‐dimensional ultrasound imaging and coronary flow velocity
Authors: Wolford Thomas , Kern Morton J. 
Published: March 2007

AbstractTransplant coronary arteriopathy is the major impediment to the long‐term survival of cardiac allografts. This report highlights two‐dimensional imaging and Doppler flow to assess transplant coronary arteriopathy. © 1995 Wiley‐Liss, Inc.
A novel approach to the placement of Palmaz‐Schatz biliary stents in saphenous vein grafts
Authors: Núñez Boris D. , Simari Robert D. , Keelan Edward T. , Menke Kris K. , Garratt Kirk N. , Holmes David R. 
Published: March 2007

AbstractThe placement of Palmaz‐Schatz biliary stents has become a successful method to treat stenoses in large saphenous vein grafts. Unlike coronary stents, the biliary stents are not routinely delivered with a selective delivery sheath and may be more difficult to deliver and prone to detachment from the balloon and even embolization during delivery. In order to enhance the ability to deliver these stents, a guide‐within‐a‐guide system was developed. A 7F guiding catheter was used as a selective delivery sheath within a standard guiding catheter. Nineteen biliary stents were successfully placed in vein grafts in 15 patients using this system. One procedure was complicated by an embolic event documented angiographically following intragraft delivery of urokinase but prior to stent implantation.
Left heart catheterization by direct puncture with two‐dimensional echocardiographic guidance: A case report
Authors: Havranek Edward P. , Sherry Paul D. 
Published: March 2007

AbstractIn patients with mechanical valves in both the mitral and aortic positions, direct ventricular puncture is the recommended approach to catheterization. We report a case in which two‐dimensional (2D) echocardiography was used to guide left heart catheterization by direct ventricular puncture and propose that the use of 2D echocardiography might reduce the risks historically associated the procedure. © 1995 Wiley‐Liss, Inc.
Anterograde perfusion in acute limb ischemia secondary to vascular occlusive cardiopulmonary support
Authors: Jaski Brian E. , McClendon Philip S. , Branch Kelley R. , Favrot Laurence K. , Smith Sidney C. , Lamphere Jeff , Dembitsky Walter P. 
Published: March 2007

AbstractCardiopulmonary support (CPS) can resuscitate a patient with circulatory collapse during high‐risk interventional procedures, although vascular complications may accompany its use. We report a patient with cardiogenic shock secondary to myocardial infarction who required extended CPS support associated with acute infarct‐related coronary artery angioplasty and stent placement. Leg ischemia due to an occlusive cannula was resolved using a percutaneous anterograde perfusion device. In general, such devices may have application in patients dependent on mechanical support associated with limb ischemia. © 1995 Wiley‐Liss, Inc.
Bacteremia associated with percutaneous transluminal coronary angioplasty
Authors: Shea Kevin W. , Schwartz Richard K. , Gambino Anthony T. , Marzo Kevin P. , Cunha Burke A. 
Published: March 2007

AbstractBacteremia after diagnostic cardiac catheterization is uncommon, but bacteremia after percutaneous transluminal coronary angioplasty (PTCA) has not been studied prospectively. Unlike diagnostic cardiac catheterization, PTCA involves the use of an indwelling arterial sheath after completion of the procedure, which is connected to a pressurized heparin solution, both of which increase the risk of local infection and/or bacteremia. During a 16‐week period, we prospectively evaluated patients undergoing 164 PTCA procedures in order to determine the frequency of bacteremia and the significance of fever in this patient population. Blood cultures were obtained from the femoral catheter at the conclusion of the procedure and again 30 min later from the indwelling arterial sheath. Temperature was recorded every 30 min for 2 h following PTCA, then every 4 h over the subsequent 36‐hr period. Bacterial isolates were recovered from 23/286 blood cultures (8.0%), with Staphylococcus epidermidis the most common organism present (74%). Only one isolate of Staphylococcus aureus was considered to represent true bacteremia and corresponded with the only documented infectious complication. Fever, defined as ⩾101°F developed in four (2.4%) patients but was procedure related in only one case. The use of the ipsilateral femoral artery for repeat procedures was not associated with either positive blood cultures or difference in maximum temperature elevation. We conclude the overall risk of bacteremia after PTCA is low; therefore, antimicrobial prophylaxis is not warranted. © 1995 Wiley‐Liss, Inc.
Use of intra‐aortic nitroglycerin in the cardiac catheterization laboratory
Authors: Marshall Timothy M. , Dodek Arthur 
Published: March 2007

AbstractThe purpose of this study was to determine whether nitroglycerin (NTG) injected into the ascending aorta or left ventricle would safely and effectively lower blood pressure in hypertensive patients undergoing cardiac catheterization. Fifty bolus injections of 297 ± 67 μg (mean ± SD) NTG were given to patients with a systolic blood pressure (SBP) of ⩾140 mm Hg (mean SBP 188 ± 20.1 mm Hg). An average drop in systolic blood pressure of 36 ± 16 mmHg (P < 0.001), diastolic blood pressure of 19 ± 7 mm Hg (P < 0.001), and left ventricular end‐diastolic pressure of 4.7 ± 4 mm Hg (P = 0.001) was well tolerated in each patient. The mean time to response was 11 ± 3 sec. Intra‐aortic injection of NTG is a safe and effective means to treat hypertensive patients in the cardiac catheterization laboratory. © 1995 Wiley‐Liss, Inc.
Effectiveness of balloon valvuloplasty in the young adult with congenital aortic stenosis
Authors: Sandhu Satinder K. , Lloyd Thomas R. , Crowley Dennis C. , Beekman Robert H. 
Published: March 2007

AbstractThe objective of this study was to assess the effectiveness of balloon valvuloplasty in the young adult with congenital aortic stenosis and to compare its effectiveness with children. Percutaneous balloon valvuloplasty is effective in children with congenital aortic stenosis, but not in adults with acquired calcific aortic stenosis. Because effectiveness of balloon valvuloplasty in young adults with congenital aortic stenosis is not well defined, we evaluated the outcome in 15 patients aged 16–24 years (18 ± 0.6; mean ± SEM) who underwent balloon valvuloplasty from 1985 to 1993. The aortic valve annulus diameter ranged from 18.5 to 30 mm (24 ± 0.9). The aortic valve was bicuspid in 12 and tricuspid in 3 patients, and calcification was present in one patient. Balloon valvuloplasty was performed using a double balloon technique in 12 patients and a single balloon technique in three patients. Three patients had inadequate relief of gradient with a residual peak systolic gradient ⩾70 mm Hg. Three patients required valve replacement—two patients for a residual gradient ⩾70 mg Hg, and one patient 4 years later for severe aortic valve regurgitation. Eight of the remaining 12 have undergone elective follow‐up catheterization 1.2–2.5 years (1.5 ± 0.1) later. The peak systolic aortic valve gradient decreased by 55% from 73 ± 5.8 mm Hg to 35 ± 5.4 mm Hg immediately postvalvuloplasty, and was 30 ± 4.4 mm Hg at follow‐up (P <0.001). The left ventricular systolic pressure decreased from 179 ± 7.5 to 147 ± 6.5 mm Hg immediately postvalvuloplasty and was 147 ± 4 mm Hg at follow‐up. Aortic insufficiency was unchanged after valvuloplasty in 9, increased by 1 + in 4, and by 2 + in 2 patients. Balloon valvuloplasty was as effective in these young adults as in 70 children (age 6 ± 0.7 years) with congenital aortic stenosis (peak systolic gradient pre‐ 79 ± 3 mm Hg versus post‐ 34 ± 2 mg Hg; at 1–2 years follow‐up 34 ± 4 mm Hg).Balloon valvuloplasty provides effective treatment in most young adults with congenital aortic stenosis, without early restenosis. Balloon valvuloplasty is as effective in young adults as in children, where it is currently the treatment of choice. © 1995 Wiley‐Liss, Inc.
Early restenosis following percutaneous transluminal balloon angioplasty for the treatment of the superior vena caval syndrome due to pacemaker‐induced stenosis
Authors: Marzo Kevin P. , Schwartz Richard , Glanz Sidney 
Published: March 2007

AbstractSuperior vena caval syndrome (SVC) following transvenous pacemaker insertion is an uncommon complication that has been treated with percutaneous transluminal balloon angioplasty. We report a case of SVC syndrome following pacemaker implantation that was treated with angioplasty. Several days after the initial balloon dilation, the patient had recurrent symptoms and evidence of restenosis on catheterization. Following repeat balloon dilation of this restenotic lesion, the patient had a favorable clinical response evidenced on hemodynamic and angiographic follow‐up at 6 months. © 1995 Wiley‐Liss, Inc.
Management of coronary artery rupture: Covered stent or microcoil embolization
Authors: Dorros Gerald , Jain Aditya , Kumar Krishna 
Published: March 2007

AbstractThe management of three cases of coronary artery rupture is described: (1) after high‐pressure balloon angioplasty following uneventful placement of three Gianturco‐Roubin stents, (2) following balloon angioplasty of an occluded diagonal branch, and (3) subsequent to rotational ablation of a left main and proximal circumflex arteries. Placement of an autologous veincovered Palmaz stent or microcoil embolic vessel occlusion solved each problem. In each case, emergency surgery was avoided; subsequent management, including anticoagulation (when indicated), was performed without incident. This is the first communication detailing correction of a coronary vessel rupture with an autologous vein‐covered stent or by microcoil embolic vessel occlusion.
Nonselective angiography of the internal mammary artery: A fast, reliable, and safe technique
Authors: Bhatt Samir N. , Jorgensen Michael B. , Aharonian Vicken J. , Mahrer Peter R. 
Published: March 2007

AbstractSelective cannulation of the mammary artery can be time consuming and carries a risk of arterial injury. The nonselective technique described here is faster, safer, and as reliable as the standard selective technique.A consecutive series of patients with previous coronary atery bypass graft surgery (CABG) were randomized to undergo either selective or nonselective mammary artery angiography. Selective angiography was performed using the standard selective technique. Nonselective angiography was performed by placing a standard catheter in the subclavian artery and hand injecting 10 ml of contrast while inflating a blood pressure cuff 10 mm above the systolic pressure in the ipsilateral arm.Fifty‐six patients were studied, 30 patients selectively, and 26 patients nonselectively. The time to visualize adequately both native and grafted mammary arteries in the selective group was 4.83 + 5.00 min and in the nonselective group 1.76 + 1.16 minutes (P = 0.006).A nonselective technique for visualizing the mammary artery is significantly faster and as reliable as the standard selective technique. © 1995 Wiley‐Liss, Inc.
Balloon mitral valvotomy in patients with systemic and suprasystemic pulmonary artery pressures
Authors: Bahl Vinay K. , Chandra Subhash , Talwar Kewal K. , Kaul Upendra , Sharma Sanjiv , Wasir H. S. 
Published: March 2007

AbstractMitral stenosis with severe pulmonary artery hypertension constitutes a high risk subset for surgical commissurotomy or valve replacement. Balloon mitral valvotomy has been proposed as a technique for treating high risk surgical patients with mitral stenosis. The efficacy of this technique in patients with severe pulmonary artery hypertension, however, has not been fully evaluated. Percutaneous transvenous mitral commissurotomy (PTMC) was performed in 450 consecutive patients. Of these, forty‐five (10%) patients had systemic or suprasystemic systolic pulmonary artery pressures (110 ± 20, range 96 to 170 mm Hg). The baseline characteristics and immediate hemodynamic results of these 45 patients with systemic/suprasystemic systolic pulmonary artery pressures (group I) were analysed and compared with those of 405 patients with subsystemic systolic pulmonary artery pressures (group II). Patients in group I were more symptomatic (New York Heart Association functional class < lll, 96 vs. 55%, P < 0.001) and had severe subvalvular fibrosis (mitral subvalvular distance ratio [MSDR], 0.14 ± 0.04 vs. 0.22 ± 0.04, P < 0.01). Before PTMC, mean transmitral gradient was higher (34 ± 8 vs. 25 ± 4 mm Hg, P < 0.02) and mitral valve area smaller (0.5 ± 0.3 vs. 0.9 ± 0.4 cm2, P < 0.02) in group I patients, who also had higher pulmonary vascular resistance (16 ± 5 vs. 9 ± 5 U, P < 0.005). After PTMC final mean transmitral gradients (7 ± 3 vs. 5 ± 3 mm Hg) and mitral valve areas (1.9 ± 0.4 vs. 2.0 ± 0.4 cm2) were similar in both groups (P = NS). Group I patients had a greater decrease in pulmonary artery pressures (34 ± 4 vs. 25 ± 2%, P < 0.05) but final systolic pulmonary artery pressures (82 ± 20 vs. 50 ± 14 mm Hg) and pulmonary vascular resistance (12 ± 4 vs. 6 ± 4 U) remained significantly higher in this group (P < 0.005). Thus, in patients with severe pulmonary artery hypertension, PTMC is a safe and effective technique providing good immediate hemodynamic results, © 1995 Wiley‐Liss, Inc.
Primary angioplasty using a urokinase‐coated hydrogel balloon in acute myocardial infarction during pregnancy
Authors: Glazier James J. , Eldin Adel M. , Hirst Jeffrey A. , Dougherty James E. , Mitchel Joseph F. , Waters David D. , McKay Raymond G. 
Published: March 2007

AbstractA 38‐year‐old multigravid white female presented at 16 weeks gestation with an acute inferoposterolateral myocardial infarction. Emergent coronary angiography demonstrated a total proximal occlusion of a large dominant left circumflex artery with a filling defect at the site of the occlusion suggestive of thrombus. Primary angioplasty using a urokinase‐coated hydrogel balloon resulted in successful recanalization of the vessel with restoration of normal TIMI Grade III flow and, most notably, apparent complete lysis of the intracoronary thrombus. After a subsequently uneventful pregnancy, a healthy baby was delivered. © 1995 Wiley‐Liss, Inc.
Transcatheter closure of residual ductus arteriosus shunting after the rashkind occluder device using single or multiple gianturco coils
Authors: Hijazi Ziyad M. , Geggel Robert L. , Ai‐Fadley Fadel 
Published: March 2007

AbstractTranscatheter closure of a patent ductus arteriosus (PDA) using the Rashkind occluder or the buttoned device is accompanied with a 7–38% incidence of residual shunt. Closure of the residual shunt with a second device is expensive, associated with possible morbidity, can be technically challenging, and occasionally does not completely eliminate the shunt. Our objective was to assess the immediate and short‐term results of transcatheter closure of residual PDA after the Rashkind device using single or multiple Gianturco coils. Five patients (one male/four female) underwent transcatheter closure of residual PDA at a median age of 8.4 yr (range 2–10.1 yr) and median weight of 23 kg (range 11.8–32 kg). A 4F catheter was used for delivery of the coils in all patients. Three patients underwent multiple coil and two single coil closure with complete elimination of the shunt. There was complete elimination of the shunt as documented by repeat angiography immediately after the coil closure. The median fluoroscopy time was 24 min (range, 22–55 min). All patients were discharged home on the same day. There were no complications Follow‐up evaluation was performed with color flow mapping of the main pulmonary artery within 4 hr after closure and 6 weeks later with echocardiography and chest radiography. We conclude that transcatheter closure is an effective therapy for patients with residual PDA after the Rashkind device using the single or multiple coil technique. This technique can be performed on an out‐patient basis without the need for general anesthesia and at a lower expense than a repeat occluder device or surgery. © 1995 Wiley‐Liss, Inc.
Stenting for pulmonary artery stenosis following the ross procedure
Authors: Lima Valter C. , Lazzam Charles , Benson Lee N. 
Published: March 2007

AbstractA 34‐year‐old woman showed the development of significant main pulmonary artery obstruction along the supravalvar suture line 18 months following a Ross procedure. The patient underwent unsuccessful balloon angioplasty, followed by successful stent implantation. The angiographic narrowing disappeared postprocedure, and the excellent hemodynamic result maintained at 4 month follow‐up. © 1995 Wiley‐Liss, Inc.
Use of a snare‐loop device as an adjunct to palmaz stent placement
Authors: Sapoval M. R. , Gaux J. C. , Beyssen B. , Hoffman O. , Raynaud A. C. 
Published: March 2007

AbstractA patient was treated by PTA for a tight excentric stenosis in the external iliac artery. Following angioplasty, appropriate placement of a Palmaz stent over the lesion was impossible because of arterial curves and irregular aspect of the residual stenosis. To overcome this problem, the stent was grasped and pulled over the lesion using a snare loop device by contralateral approach. © 1995 Wiley‐Liss, Inc.
Abnormal diastoiic unopacified blood front: A useful marker of mitral stenosis
Authors: Shapira Yaron , Wurzel Mordechai 
Published: March 2007

AbstractThe left ventriculograms of 113 patients, divided into seven groups, were reviewed for the detection of unopacified front (UOF) of blood entering the left ventricle (LV) during diastole. Normal UOF was detected in all the patients without left‐sided valvular heart disease (regardless of the existence of coronary artery disease), constrictive pericarditis, aortic stenosis, and mitral regurgitation, although in the last group the UOF faded after several beats in 70% of cases. Only 5% of the patients with isolated mitral stenosis (MS) had an UOF, 75% had an abnormal UOF (< 60% of LV inflow tract), and 20% (with the greatest degree of MS) had only a dilution effect. A dilution effect was found in 62.5% of the patients with severe (⩾3°) aortic regurgitation (AR). An abnormal UOF is a sensitive and specific marker of significant MS. A dilution effect is indicative of either a significant MS or severe AR. © 1995 Wiley‐Liss, Inc.
Differential neuronal and glial expression of GluR1 AMPA receptor subunit and the scaffolding proteins SAP97 and 4.1N during rat cerebellar development
Authors: Douyard Jessica , Shen Lei , Huganir Richard L. , Rubio Maria E. 
Published: March 2007

AbstractIn neurons, AMPA glutamate receptors are developmentally regulated and selectively targeted to synaptic sites. Astroglial cells also express AMPA receptors, but their developmental pattern of expression and targeting mechanisms are unknown. In this study we investigated by immunocytochemistry at the light and electron microscopy level the expression of GluR1 and its scaffolding proteins SAP97 (synapse‐associated protein) and 4.1N during cerebellar development. In cerebellar cortex the GluR1 AMPA receptor subunit is expressed exclusively in Bergmann glia in the adult rodent. Interestingly, we observed that GluR1 was expressed postsynaptically at the climbing fibers (CF) synapse at early ages during Purkinje cell dendritic growth and before the complete ensheathment of CF/Purkinje cell synapses by Bergmann glia. However, its expression changed from neurons to Bergmann glia once these glial cells had completed their enwrapping process. In contrast, GluR2/3 and GluR4 AMPAR subunits were stably expressed in both Purkinje cells (GluR2/3) and Bergmann glia (GluR4) throughout postnatal development. Our data indicate that GluR1 expression undergoes a developmental switch from neurons to glia and that this appears to correlate with the degree of Purkinje cell dendritic growth and their enwrapping by Bergmann glia. SAP97 and 4.1N were developmentally regulated in the same pattern as GluR1. Therefore, SAP97 and 4.1N may play a role in the transport and insertion of GluR1 at CF/Purkinje cell synapses during early ages and at Bergmann glia plasma membrane in the adult. The parallel fiber (PF)/Purkinje cell synapse contained GluR2/3 but lacked GluR1, SAP97, and 4.1N at the time of PF synaptogenesis. J. Comp. Neurol. 502:141–156, 2007. © 2007 Wiley‐Liss, Inc.
Organization of the sensory input to the telencephalon in the fire‐bellied toad, Bombina orientalis
Authors: Laberge Frédéric , Roth Gerhard 
Published: March 2007

AbstractThe functional organization of sensory activity in the amphibian telencephalon is poorly understood. We used an in vitro brain preparation to compare the anatomy of afferent pathways with the localization of electrically evoked sensory potentials and single neuron intracellular responses in the telencephalon of the toad Bombina orientalis. Anatomical tracing showed that the anterior thalamic nucleus innervates the anterior parts of the medial, dorsal, and lateral pallia and the rostralmost part of the pallium in addition to the subpallial amygdala/ventral pallidum region. Additional afferents to the medial telencephalon originate from the thalamic eminence. Electrical stimulation of diverse sensory nerves and brain regions generated evoked potentials with distinct characteristics in the pallium, subpallial amygdala/ventral pallidum, and dorsal striatopallidum. In the pallium, this sensory activity is generated in the anterior medial region. In the case of olfaction, evoked potentials were recorded at all sites, but displayed different characteristics across telencephalic regions. Stimulation of the anterior dorsal thalamus generated a pattern of activity comparable to olfactory evoked potentials, but it became similar to stimulation of the optic nerve or brainstem after bilateral lesion of the lateral olfactory tract, which interrupted the antidromic activation of the olfactohabenular tract. Intracellular bimodal sensory responses were obtained in the anterior pallium, medial amygdala, ventral pallidum, and dorsal striatopallidum. Our results demonstrate that the amphibian anterior pallium, medial amygdala/ventral pallidum, and dorsal striatopallidum are multimodal sensory centers. The organization of the amphibian telencephalon displays striking similarities with the brain pathways recently implicated in mammalian goal‐directed behavior. J. Comp. Neurol. 502:55–74, 2007. © 2007 Wiley‐Liss, Inc.