bluuebunny/crossref_metadata_2025_split huggingface dataset:
Use of half of the palmaz‐schatz stent in a stent‐related dissection
Authors: Hadjimiltiades Stavros , Gourassas John , Louridas George , Tsifodimos Dimitrios 
Published: March 2007

AbstractThe placement of a Palmaz‐Schatz stent may be associated with the development of a dissection and this may increase the danger of coronary thrombosis. In this case report we describe the use of half of the Palmaz‐Schatz stent to cover such a dissection. The use of the half stent, by reducing the amount of metal and stent overlapping, may reduce the incidence of thrombosis and restenosis. © 1993 Wiley‐Liss, Inc.
Coronary artery aneurysms: An unusual case report and a review of the literature
Authors: Barettella Mark B. , Bott‐Silverman Corinne 
Published: March 2007

Abstract© 1993 Wiley‐Liss, Inc.Coronary artery aneurysms (CAA) were first recognized in postmortem studies. More recently they have been recognized in antemortem and angiographic studies and are reported to occur at an incidence of 1‐2%. Left main coronary aneurysms (LMCA) are extremely rare with an incidence of 0.1%. Most of the aneurysms discovered in these angiographic studies have been in patients with cardiac symptoms of angina or acute myocardial infarction who subsequently were found to have severe narrowing of the coronary arteries. Angiographic and clinical data of a patient with a large aneurysm of the left main coronary artery and with aneurysmal disease of the thoracic and abdominal aorta are presented along with a review of the literature. © 1993 Wiley‐Liss, Inc.
Successful directional atherectomy of eccentric renal artery stenosis using the simpson directional coronary atherocath as a primary therapy
Authors: Kushner Frederick G. , Helm Michael J. 
Published: March 2007

AbstractA 67‐yr‐old female patient with accelerated hypertension, severe peripheral vascular disease, diabetes mellitus, and coronary artery disease had an abnormal renal scan, renal angiogram, and renal vein renin determination with lateralization to the left kidney. Angiography demonstrated a very tight, eccentric plaque obstructing the left renal artery of approximately 99%. Because of the anatomy of the plaque, balloon dilatation was deemed inadvisable. Subsequently, a Simpson 7F graft DCA atherocath through a four‐curved 10F right bypass graft guiding catheter was used to successfully debulk the left renal artery. After debulking, the artery was dilated with a 5 mm Meditech balloon on a wire through a Cobra guiding catheter. The patient's blood pressure responded immediately and there were no complications. A large amount of atherosclerotic plaque was removed from the renal artery. © 1993 Wiley‐Liss, Inc.
Aortic dissection with aortopulmonary artery fistula
Authors: Tate David A. , Parker L. Alden , Starek Peter J. K. , Harper James R. 
Published: March 2007

AbstractA case of aortic dissection complicated by aortopulmonary artery fistula is reported. Aggressive diagnostic and surgical management was associated with a favorable, longterm outcome. © 1993 Wiley‐Liss, Inc.
Effect of percutaneous balloon mitral valvuloplasty on serum creatinine phosphokinase MB‐isoenzyme levels
Authors: Yip Alex S. B. , Chow W. H. , Fu K. H. , Cheung K. L. , Li J. P. S. , Lee J. S. K. 
Published: March 2007

AbstractTwenty‐one patients with moderate to severe mitral stenosis were treated with percutaneous balloon mitral valvuloplasty (PBMV) using lnoue mitral double‐lumen balloon catheters. Creatinine phosphokinase MB isoenzyme (CPK‐MB) levels were measured at baseline, 5 min, 6 h, and 18 h post dilatation. Haemodynamic indexes, 12‐lead ECGs, and 2‐dimensional echocardiograms were performed to evaluate systolic function postprocedure. CPK‐MB levels were modestly increased at 5 min and at 6 h postprocedure compared with the baseline level (p < 0.001) but were still within the normal reference range, except for one patient who had a level at 5 min minimally above the upper limit of normal. CPK‐MB levels were not significantly increased at 18 h after the procedure. No significant changes in ejection fractions, 12‐lead ECGs, and regional wall motion occurred in any of the patients studied. In conclusion, PBMV causes modest early elevation of CPK‐MB. This elevation is not associated with changes in LV systolic function and does not interfere with the diagnosis of acute myocardial infarction using the enzyme elevation criteria. © 1993 Wiley‐Liss, Inc.
Resistance of the atherosclerotic plaque during coronary angioplasty: A multivariate analysis of clinical and angiographic variables
Authors: Chenu Patrick , Zakhia Raymond , Marchandise Baudouin , Jamart Jacques , Michel Xavier , Schroeder Erwin 
Published: March 2007

AbstractThe atherosclerotic lesion resistance to balloon inflation was assessed prospectively in 200 patients undergoing primary single‐site balloon percutaneous transluminal coronary angioplasty (PTCA) by using an identical inflation protocol. This resistance was evaluated by the stenosis resolution pressure, which is the pressure at which the lesion mark is no longer visible on the inflated balloon. The stenosis resolution pressure distribution was normal with a mean value of 4.4±2.3 atmospheres.Multivariate analysis revealed 4 factors related to the stenosis resolution pressure: stable angina pectoris (p < 10−6), the presence of calcifications (p = 0.016), the occurrence of vessel wall dissection after balloon angioplasty (p = 0.005), and the absence of a branch arising in the middle of the stenosis (p = 0.047).It is concluded that the mechanical resistance of the coronary lesion is related to the anginal status, the presence of calcifications, and the occurrence of vessel wall dissection after balloon angioplasty, probably on the basis of the plaque composition. © 1993 Wiley‐Liss, Inc.
New techniques for guiding catheter management during directional coronary atherectomy
Authors: McLvor Michael E. , Rosenthal Andrew D. , Lawson Jan 
Published: March 2007

AbstractDirectional coronary atherectomy (DCA) is an important advance in the mechanical revascularization of stenotic coronary arteries. The bulky nature of the DCA device has necessitated the use of guiding catheter designs that are more cumbersome to use than balloon angioplasty guiding catheters. Because engagement of coronary artery ostia with the currently available DCA guiding catheters is often difficult and because DCA guiding catheters significantly “relax” and reshape during the atherectomy procedure, angiography using these guiding catheters before and after atherectomy can be suboptimal. A new technique for angiography during atherectomy using long Judkin's diagnostic catheters inserted through the existing DCA guiding catheters is described. This technique can be used for optimal visualization of the coronary arteries with minimal use of contrast before and after sessions of atherectomy and also can be used to help engage the DCA guiding catheters. Some improvements in the design of guiding catheters for DCA are suggested. © 1993 Wiley‐Liss, Inc.
Left ventricular rupture following myocardial infarction treated with streptokinase: Successful resuscitation in the cardiac catheterization laboratory using pericardiocentesis and autotransfusion
Authors: Proli Joseph , Laufer Nathan 
Published: March 2007

AbstractAn 80‐year‐old female developed left ventricular rupture in the cardiac catheterization laboratory following myocardial infarction treated with streptokinase. The patient was resuscitated using pericardiocentesis and autotransfusion. This technique and the predisposing factors for left ventricular rupture are discussed. © 1993 Wiley‐Liss, Inc.
Cardiac catheterization and coronary angiography using 5 french preformed (Judkins) catheters from the percutaneous right brachial approach: A comparative analysis with the femoral approach
Authors: Bush Charles A. , Vanfossen Douglas B. , Kolibash Albert J. , Magorien Raymond D. , Bacon James P. , Ansel Gary M. , Eaton Gregory M. , Ramancik Mary Jo , Orsini Anthony R. , Palmer Sammie L. 
Published: March 2007

AbstractThis study describes a method for the performance of cardiac catheterization using 5 French preformed Judkins catheters from a percutaneous right brachial approach, and compares that technique to the more traditional percutaneous right femoral approach with 6 French catheters. One hundred consecutive patients requiring diagnostic left heart catheterization and selective coronary angiography were randomized according to femoral versus brachial arterial technique. Procedural efficiency, radiation exposure, and diagnostic film quality favored the femoral approach, while patient comfort, hemostasis time, time to ambulation, and decreased need for post‐procedure nursing care favored the brachial approach. No differences were identified in complications.Cardiac catheterization from a right brachial artery percutaneous approach with 5 French preformed catheters has both advantages and disadvantages when compared with a more traditional femoral approach with 6 French catheters. Multiple factors should be considered before selecting an approach to diagnostic cardiac catheterization and each patient should be individually evaluated for determination of the optimal technique. © 1993 Wiley‐Liss, Inc.
Transcatheter occlusion of the patent ductus arteriosus in the presence of mild isthmal hypoplasia
Authors: Nykanen David G. , Hayes Alison M. , Benson Lee N. , Freedom Robert M. 
Published: March 2007

AbstractBetween January 1990 and February 1992, 5 asymptomatic patients were identified with hypoplasia of the aortic isthmus at the time of cardiac catheterization for closure of a small patent ductus arteriosus. Isthmal diameters measured from lateral aortograms were 62 ± 11% of age‐matched controls. All patients had a small communication occluded with a 12 mm device and remained asymptomatic at 6–30 months follow up. Residual shunting was demonstrated by color Doppler in 2 patients. No child has developed an arm‐leg systolic blood pressure gradient or systemic hypertension. Following device placement, Doppler interrogation across the isthmus in 2 patients demonstrated a velocity shift of 2.1 m/s. Transcatheter occlusion of the patent ductus arteriosus associated with mild isthmal hypoplasia of the aortic arch appears safe and effective and does not result in a clinically significant impairment to isthmal flow in short‐term follow‐up. © 1993 Wiley‐Liss, Inc.
Balloon rupture during peripheral stent implantation: A new technique for balloon retrieval
Authors: Bersin Robert M. , Gold Richard S. 
Published: March 2007

AbstractBalloon rupture is a known technical problem with implantation of vascular stents. In most cases, the ruptured balloon can be retrieved with simple maneuvers. In this case report, a peripheral balloon became trapped within an undeployed peripheral vascular stent and could not be removed by application of standard maneuvers. A novel approach to balloon retrieval was devised and undertaken with success. © 1993 Wiley‐Liss, Inc.
Successful aortic balloon valvuloplasty in critical aortic stenosis with shock
Authors: Bhatia Atul , Kumar Anil , Seth Ashok , Bhatia M. L. , Trehan Naresh 
Published: March 2007

AbstractEmergency balloon valvuloplasty was performed in a 42 year old male with critical aortic stenosis, severe congestive heart failure, and shock. Hemodynamic and clinical improvement occurred and he underwent elective aortic valve replacement. Balloon aortic valvuloplasty may provide a “bridge” to aortic valve replacement in patients with critical aortic stenosis and shock. © 1993 Wiley‐Liss, Inc.
Quantitative demonstration of dipyridamole‐induced coronary steal and alteration by angioplasty in man: Analysis by simultaneous, continuous dual doppler spectral flow velocity
Authors: Kern Morton J. , Wolford Thomas , Donohue Thomas J. , Bach Richard G. , Aguirre Frank V. , Caracciolo Eugene A. , Flynn Michael S. 
Published: March 2007

AbstractIn the course of studying the effects of coronary angioplasty on branch vessel flow using two Doppler flow velocity guidewires, we quantitated simultaneous blood flow responses proximal and distal to a stenosis. The alterations of flow documented a horizontal epicardial steal induced during dipyridamole hyperemia, hyperemic flow reversal by intravenous aminophylline, and subsequent normalization of distal hyperemia after endoluminal enlargement by successful angioplasty. The quantitative physiology of the patient described here confirms one postulated mechanism of abnormal myocardial perfusion stress scintigraphy. Continuous dual flowire spectral coronary flow determinations appear to be a valuable method in verifying postulated mechanisms of various pharmacologic and mechanical stimuli influencing coronary blood flow in patients with atherosclerotic coronary artery disease. © 1993 Wiley‐Liss, Inc.
Radiation exposure: Comparison of rapid exchange and conventional over‐the‐wire coronary angioplasty systems
Authors: Linnemeier Thomas J. , McCallister Scott H. , Lips Daniel L. , Klette Melissa A. , Rothbaum Donald A. , Ball Michael W. , Landin Ronald J. , Hodes Zachary I. , Riddell Robert V. 
Published: March 2007

AbstractThe growth of coronary angioplasty has resulted in increased fluoroscopy time to patients, staff, and physicians. Rapid exchange‐type catheters have purported to reduce fluoroscopy time and procedure time compared to conventional over‐the‐wire systems. Of 150 consecutive patients, 54 were treated solely with rapid‐exchange catheters and 84 were treated solely with over‐the‐wire catheters. Excluding 12 cases treated with fixed wire or combination catheters, the following data were found:
magnified imageOverall procedural success was obtained in 98.5% (136/138) of patients, 1.5% (2) requiring emergency coronary artery bypass graft surgery. A significant 35% reduction in fluoroscopy time and 13% reduction in procedure time were found when rapid‐exchange catheters were used, with identical success rates, number of balloons used per case, and complication rates compared to over‐the‐wire catheters. Rapid‐exchange catheters should be considered as part of an overall effort to reduce radiation exposure in the interventional cardiology laboratory.
Simplified method for calculating aortic valve resistance: Correlation with valve area and standard formula
Authors: Kegel Jeffrey G. , Schalet Bennett D. , Corin William J. , Iskandrian Abdulmassih S. 
Published: March 2007

AbstractAortic valve resistance (AVR) is a useful index to assess the severity of aortic stenosis. This study compared the standard method to calculate AVR with a simplified method based on the conventional approach for measuring vascular resistance: AVR = (peak‐to‐peak transaortic pressure gradient/(cardiac output*2.5))*80, where 80 is a conversion factor and 2.5 assumes that the systolic ejection period comprises 40% of the R‐R cycle. We compared the standard AVR, the simplified AVR, and the Gorlin‐derived value area in 118 patients with pure or dominant aortic stenosis. There was a strong linear correlation between the standard and simplified AVR (r = 0.96, p < .0001). There was a curvilinear relation between the aortic valve area and AVR (r = 0.92, p < .001). In 48 patients with aortic valve area ≥0.7 cm2, the AVR was <300 dynes‐sec‐cm−5 in 45 patients (94%) by the standard method and in 42 patients (88%) by the simplified method (p = NS). In conclusion, our method for measuring AVR is accurate and simpler than the standard method.© 1993 Wiiey‐Liss, Inc.
Fragmentation and embolization of a plastic‐coated guidewire
Authors: Prewitt Kerry C. , Resar Jon R. , Brinker Jeffrey A. 
Published: March 2007

AbstractWe report a case of fragmentation and embolization to the pulmonary artery of sheared pieces of a recently introduced hydrophilic plastic‐coated guidewire. The propensity for this to occur, the lack of initial recognition, and the ability to retrieve the fragments by catheter techniques are emphasized. As these guidewires are more frequently used, physicians should be aware of this potential complication. © 1993 Wiiey‐Liss, Inc.
Percutaneous transvenous mitral commissurotomy in patients with severe kyphoscoliosis
Authors: Ramasamy Dewi , Zambahari Robaayah , Fu Morgan , Yeh Kou‐Ho , Hung Jui‐Sung 
Published: March 2007

AbstractBecause transseptal catheterization is felt to be contraindicated in patients with severe kyphoscoliosis, there have been no reports of percutaneous transvenous mitral commissurotomy performed in such patients. This report describes percutaneous transvenous mitral commissurotomy in three patients with severe thoracic kyphoscoliosis, with special emphasis on the transseptal puncture technique. Biplane right atrial angiography and the contrast septal flush method are very useful in landmark selection for a safe transseptal puncture. © 1993 Wiiey‐Liss, Inc.
Evaluation of two oximeters for use in cardiac catheterization laboratories
Authors: Freeman Gregory L. , Steinke John M. 
Published: March 2007

AbstractWe evaluated two whole‐blood oximeters designed for use in the cardiac catheterization laboratory: the Oxicom 3000 and the AVOXimeter 1000. Unlike the larger CO‐Oximeters, which hemolyze a blood sample before analysis, these simple instruments use disposable cuvettes to allow determination of oxyhemoglobin saturation of whole blood. Thus they eliminate the need for cleaning solutions and considerable maintenance. We evaluated the accuracy of these instruments in comparison with a Radiometer OSM3 and found them both to work well on routine samples. Of note, the AVOXimeter performed better than the Oxicom when the sample was hemolyzed and when green dye was present. In addition, the AVOXimeter measures the total hemoglobin concentration and the oxygen content of each sample, eliminating errors that hemodilution introduces into the determination of cardiac output by the Fick principle. We conclude that whole‐blood oximeters are accurate and useful instruments for use in the cardiac catheterization laboratory. © 1993 Wiiey‐Liss, Inc.
Brachial approach directional coronary atherectomy of a left coronary artery saphenous vein bypass graft
Authors: Feldman Robert L. , Urban Paul L. 
Published: March 2007

AbstractDirectional coronary atherectomy (DCA) of a saphenous vein bypass graft to the left coronary artery was performed percutaneously from the brachial artery approach using a 7F endomyocardial biopsy sheath. Initial positioning was accomplished with a left bypass graft catheter inserted in the sheath. This technique permits use of smaller catheters than usual for DCA in patients in whom larger guides cannot be used. © 1993 Wiiey‐Liss, Inc.
Percutaneous rotational thrombectomy reduces acute reocclusion in an animal model of acute coronary thrombosis
Authors: Dewhurst Timothy A. , Bruneau Rodney , Titus Bradley , Clement Thomas J. , Auth David A. , Ritchie James L. 
Published: March 2007

AbstractThis study was designed to compare acute reocclusion rates after treatment of acute coronary thrombosis with a percutaneous thrombectomy device or standard balloon angioplasty. Our group has previously reported on the rationale and development of a mechanical device for the treatment of intra‐arterial thrombosis. This device removes fibrin from thrombus, allowing for dissolution of the cellular elements of the thrombus. Theoretically, thrombus removal (as opposed to displacement) might result in a lower rate of acute rethrombosis. The present study utilizes the device percutaneously in the coronary arteries of closed chest swine and compares recanalization and reocclusion rates with standard balloon angioplasty. Twenty‐six animals with total thrombotic coronary occlusions were treated; 13 with each device. Reocclusion rates with the thrombectomy device were significantly reduced at 60 min and 120 min after recanalization (p < 0.02), and the mean time to reocclusion was prolonged by 45 min (p = 0.07). Technical problems included poor handling characteristics in early prototypes and stress fractures secondary to improper use. Changes in catheter design and operator protocols have largely eliminated these problems. We conclude that this study demonstrates the feasibility of percutaneous mechanical thrombectomy in the coronary arteries and that reocclusion rates after recanalization of thrombotic occlusions compare favorably to standard angioplasty. © 1993 Wiiey‐Liss, Inc.
Ventricular free wall and septal rupture (double rupture): A “pseudocomplication” during post‐infarction laser angioplasty
Authors: Reiner Jonathan S. , Lundergan Conor F. , Tenner Monica P. , Abraham A. Andrew , Ross Allan M. 
Published: March 2007

AbstractWe report the rare occurrence of double rupture of the myocardium occurring immediately following successful laser recanalization of an occluded right coronary artery in a 72‐year‐old woman 5 days following infero‐posterior myocardial infarction. © 1993 Wiiey‐Liss, Inc.
Transcoronary cardiac pacing during myocardial ischemia
Authors: Laird MAJ. John R. , Hull MAJ. Robert , Stajduhar MAJ. Karl C. , Weston MAJ. Lawrence T. , Kufs MAJ. William , Wortham Dale C. 
Published: March 2007

AbstractSevere bradyarrhythmias are a rare but potentially life threatening complication of percutaneous transluminal coronary angioplasty (PTCA). Previous work has outlined a technique for coronary pacing using the angioplasty guidewire. To examine the effectiveness of this technique during severe ischemia, seven swine underwent placement of an unmodified 0.014 inch angioplasty guidewire and 3.0 mm balloon catheter in the left anterior descending (LAD) artery. Baseline pacing thresholds were obtained. Pacing was begun at twice diastolic threshold and ischemia was produced by balloon inflation. Repeat capture thresholds were obtained after 1 and 8 minutes of ischemia. Transcoronary pacing was successfully performed in all seven animals and was continued for a mean of 13.8 1.5 minutes. The baseline capture threshold was 4.0 0.5 mA. The mean capture threshold was 3.3 0.3 mA and 4.5 0.9 mA at 1 and 8 minutes of ischemia, respectively. We conclude that transcoronary pacing using the angioplasty guidewire can be successfully performed during myocardial ischemia and may serve as a reliable backup system during interventional procedures complicated by bradyarrhythmias. © 1993 Wiiey‐Liss, Inc.
Multivariable model for prediction of risk of significant complication during diagnostic cardiac catheterization
Authors: Laskey Warren , Boyle John , Johnson Lewis W. 
Published: March 2007

AbstractAlthough adequate data exist on the frequency of procedural‐related complications during diagnostic cardiac catheterization, little information is available for the quantitative assessment of risk factors for significant complication. We analyzed 58,332 procedures in the 1990 SCA&I Registry Database in order to assess (1) the independent and cumulative significance of easily obtainable pre‐procedural factors predictive of major complication and (2) the likelihood of a significant complication given the presence of these risk factors. A model was developed on a random sample of 38,888 patients and validated in the remaining 19,444 patients. Twelve variables were identified as having independent predictive behavior for significant complication with excellent agreement in the validation sample. The current model is an accurate and reliable instrument for stratifying risk of a significant complication during diagnostic catheterization.© 1992 Wlley‐Liss, Inc
Aneurysm of the left main coronary artery without obstructive disease: report of a case presenting with severe unstable angina and treated with systemic thrombolysis
Authors: Vecchia Luigi La , Bedogni Francesco , Ometto Renato , Mosele Gian Marco , Vincenzi Mario 
Published: March 2007

AbstractA fusiform aneurysm of the left main coronary artery without associated obstructive disease was detected in a 77‐year‐old patient with severe unstable angina treated with systemic thrombolysis. The authors emphasize the following features: (1) unusual location of the aneurysm, (2) absence of concomitant obstruction in this age group, and (3) clinical efficacy of thrombolysis and subsequent long‐term oral anticoagulation.© 1993 Wlley‐Liss, Inc