bluuebunny/crossref_metadata_2025_split huggingface dataset:
Retrograde nontransseptal balloon mitral valvuloplasty using a modified inoue balloon catheter
Authors: Stefanadis Christodoulos , Stratos Costas , Kallikazaros Ioannis , Tsiamis Eleftherios , Vlachopoulos Charalambos , Sideris Assimakis , Toutouzas Costas P. , Toutouzas Pavlos 
Published: March 2007

AbstractRetrograde nontransseptal balloon mitral valvuloplasty, a method developed in our institution for the treatment of symptomatic mitral stenosis, avoids transseptal catheterization. Until recently, the self‐positioning Inoue balloon catheter, unlike all other commercially available balloon catheters, had not been employed in this nontransseptal technique due to the short length of its catheter shaft. To employ a self‐positioning balloon in retrograde nontransseptal balloon mitral valvuloplasty, we modified the Inoue device by extension of the catheter shaft. After retrograde nontransseptal left atrial catheterization using a steerable cardiac catheter, the modified Inoue balloon catheter was inserted through the femoral artery and advanced to the mitral valve retrogradely. Valvuloplasty was performed in 20 patients, with a successful result achieved in all. The modified Inoue balloon catheter was easy to use in retrograde nontransseptal balloon mitral valvuioplasty and showed excellent stability during inflation. Mean mitral valve area increased from 1.0 ± 0.29 to 2.23 ± 0.64 cm2 (P<0.001) and mean transmitral gradient decreased from 11.4 ± 6 to 4.3 ± 2.1 mm Hg (P<0.001). No major or minor complications were observed. Retrograde nontransseptal balloon mitral valvuloplasty using a modified Inoue balloon catheter is a feasible and effective technique for the treatment of symtomatic mitral stenosis. It appears to combine the advantages of avoiding transseptal catheterization with the advantages of this balloon's special configuration. © Wiley‐Liss, Inc.
Correct and spurious calibration of the Oxicom™ oximeter
Authors: Russell Edward L. 
Published: March 2007

AbstractOxicom™ oximeters are widely used in cardiac catheterization laboratories. To calibrate the Oxicom oximeter, samples of oxygenated and deoxygenated whole blood are first analyzed on a CO‐Oximeter, and then the Oxicom is adjusted to agree with the CO‐Oximeter's readings. Subsequently, the Oxicom's calibration is confirmed at frequent intervals by taking readings from a white plastic stick that is inserted into the instrument to simulate a blood sample. The data in this report demonstrate that the readings from the white plastic “test simulator” failed to detect an out‐of‐calibration condition. By contrast, when the Oxicom was carefully adjusted to agree with a CO‐Oximeter's readings on arterial and venous blood, a linear calibration curve resulted, and the Oxicom achieved its specified accuracy (2.5%). The precautions necessary to calibrate the Oxicom correctly are enumerated in the text. © Wiley‐Liss, Inc.
Effect of atrial septal occlusion on mitral area after Inoue balloon valvotomy
Authors: Levin Thomas N. , Feldman Ted , Carroll John D. 
Published: March 2007

AbstractThe purpose of this study was to examine the influence of the atrial communication created during transseptal passage of the Inoue balloon catheter on calculated mitral valve area after balloon valvotomy for severe mitral stenosis.Even in the absence of oxymetric evidence for a shunt, atrial septal puncture may result in left‐to‐right shunting of blood with reported spurious increases in postvalvotomy mitral valve area calculations ranging from 16–29% in prior studies. Occlusion of the septal puncture site after double balloon valvotomy has previously been shown to result in decreased postvalvotomy mitral valve area determinations.We evaluated 20 patients undergoing mitral dilation. Each patient had three postvalvotomy measurements made: (1) with the Inoue balloon catheter positioned across the septum, (2) during septal occlusion with a 7F balloon‐tip catheter, and (3) without any catheters across the septum.With the Inoue catheter across the septum after successful valvotomy, the cardiac output was 4.6 ± 1.5 L/min and the calculated mitral valve area was 1.7 ± 0.5 cm2. No difference was found in either cardiac output or valve area when the septum was unobstructed by catheters. During septal occlusion, however, the postvalvotomy cardiac output decreased to 4.3 ± 1.3 L/min (P<0.001) and the calculated mitral area decreased by 12% to 1.5 ± 0.5 cm2 (P<0.001). The calculated mitral valve areas determined with the Inoue catheter in place after valvotomy were in agreement with echo derived data.Although statistically significant differences in post‐Inoue valvotomy cardiac output and calculated mitral valve area were found during septal occlusion, these differences were small. Furthermore, echocardiographic valve area measurments agreed with invasively determined mitral valve areas regardless of whether or not the septum was ccluded. We conclude that septal occlusion is not necessary for valve area measurement after Inoue balloon mitral valvotomy. © Wiley‐Liss, Inc.
Combined intraaortic balloon counterpulsation with synchronized coronary venous retroperfusion: The united states experience
Authors: Freedman Robert J. , Lasorda David M. , O'Neill William W. 
Published: March 2007

AbstractPrompted by severe cardiogenic shock, impending or manifest, three cases from the United States Retroperfusion Clinical Trials utilized intraaortic balloon counterpulsation combined with retroperfusion. Temporary stabilization and improvement was noted in all three cases and long‐term survival was seen in two of the cases. The clinical and physiologic bases for combined use of these modalities is discussed. © Wiley‐Liss, Inc.
Use of half (disarticulated) Palmaz‐Schatz stents for thrombus‐containing coronary lesions
Authors: Mehan Vivek K. , Kaufmann Urs , Salzmann Christian , Meier Bernhard 
Published: March 2007

AbstractCoronary stenoses associated with thrombus can lead to poor angioplasty results and increased procedural complications. Stenting in the presence of thrombus is associated with an increased risk of stent thrombosis. We report eight patients in whom half a Palmaz‐Schatz stent was implanted for inadequate angioplasty results owing to thrombus. Stenting resulted in improved angioplasty results; no stent thrombosis occurred. © Wiley‐Liss, Inc.
Repeat embolization of the side branch of the internal mammary artery graft by gelatin sponge particles and micro coils
Authors: Ishizaka Nobukazu , Ikari Yuji , Saeki Fumihiko , Ishizaka Yuko , Tamura Tsutomu , Yamaguchi Tetsu , Suma Hisayoshi , Ibukuro Kenji 
Published: March 2007

AbstractThe internal mammary artery (IMA) is increasingly used as a coronary bypass conduit because of better long‐term patency and improved prognosis as compared with venous grafts. Previous investigators have suggested that the “steal” of blood flow of the IMA graft via the subclavian artery or a persistent large side branch of the graft may lead to its thinning. However, only a few reports have described the embolization of a large side branch using a transcatheter procedure. We present a case of repeated embolization of a large lateral costal side branch of the left internal mammary arterial graft applying gelatin sponge particles and micro coils, as well as angioplasty to the graft conduit, with resulting easing of chest pain.
Localized drug delivery in atherosclerotic arteries via a new balloon angioplasty catheter with intramural channels for simultaneous local drug delivery
Authors: Hong Mun K. , Wong S. Chiu , Farb Andrew , Mehlman Moshe D. , Virmani Renu , Barry James J. , Leon Martin B. 
Published: March 2007

AbstractA dual‐purpose angioplasty catheter with intramural channels and exterior pores for local drug delivery (“channeled balloon”) was studied in eight atherosclerotic human necropsy arteries and in 22 rabbits with atherosclerotic peripheral arteries, in which markers (0.005 m̈m to 15 m̈m) were infused locally at 2 atmospheres during simultaneous angioplasty at 6 atmospheres. Thirteen of the rabbits were sacrificed at 4 or 24 h after procedure to determine the intramural retention over time. Histology confirmed effective angioplasty and revealed presence of markers in the arterial wall in 29 of 43 treated arteries (67%), whereas all control segments without local delivery had no marker staining. Majority of the ineffective local delivery (12/14) occurred when 15 m̈m particles were infused (12/13 arteries without intramural markers), especially when examined 4 or 24 h later. Thus, in atherosclerotic arteries, the channeled balloon enabled simultaneous local drug delivery at low pressure during effective angioplasty, although particle size may play a role in successful intramural impregnation and retention.
Subclavian artery dissection during diagnostic cardiac catheterization: The role of conservative management
Authors: Frohwein Stephen , Ververis John J. , Marshall J. Jeffrey 
Published: March 2007

AbstractDissection of the subclavian artery during routine cardiac catheterization while obtaining cannulation to the left internal mammary artery is an unusual complication and to our knowledge has never been reported. Conservative management of this vascular injury can avoid the sequelae of high‐risk surgical repairs made difficult by a complex operative exposure. We describe a case in which dissection of the left subclavian artery was treated conservatively with an excellent outcome.
Aneurysm of saphenous vein graft to coronary artery presenting as non‐q‐wave myocardial infarction secondary to mass effect
Authors: Sahouri Saed J. , Steele Robert L. 
Published: March 2007

AbstractLarge aneurysms (>4 cm) of saphenous vein grafts (SVG) to coronary arteries are a rare complication of coronary artery bypass graft surgery (CABG). A 64‐year‐old male, status post‐CABG 14 years ago, presented with dyspnea and diaphoresis. Pneumonia and non‐Q‐wave myocardial infarction (MI) were diagnosed. Cardiac catheterization and chest computed tomography demonstrated a 5 × 7‐cm aneurysm of a SVG. At the time of surgery, the left internal mammary artery (grafted to the left anterior descending artery) was found to be stretched tautly over the aneurysm, resulting in impaired flow. The aneurysm was successfully resected. This is the first published case implicating a SVG aneurysm as the direct cause of a MI by mass effect.
Aneurysm of the aortic sinus of valsalva with reversed shunt of ductus arteriosus
Authors: Liang Chi‐Di , Su Wen‐Jen 
Published: March 2007

AbstractA rare case of aneurysm of aortic sinus of Valsalva associated with patent ductus arteriosus and Eisenmenger's syndrome in a 7‐yr‐old boy is described. The diagnosis was made by echocardiography and cardiac angiography.
Hugging balloon angioplasty of right coronary artery
Authors: Oral Dervis , Pamir Gülgün , ömürlü Kenan , Alpman Ahmet , Ispanoglu Müfit , Akyol Turhan 
Published: March 2007

AbstractWe report a case of “hugging balloon” dilatation of a giant right coronary artery using two dilatation catheters, a balloon “on a wire” and a balloon “rapid exchange” systems via a single guiding catheter. The necessity of larger PTCA balloon catheter (>4.0 mm) was stressed.
Transcatheter radiofrequency perforation and stent implantation for palliation of pulmonary atresia in a 3060‐g infant
Authors: Schneider Martin , Schranz Dietmar , Michel‐Behnke Ina , Oelert Hellmut 
Published: March 2007

AbstractIn a 3060‐g infant with fibromuscular pulmonary atresia an open right ventricular outflow tract was created by means of interventional cardiological methods. Following two inadvertent perforations without sequelae or clinical symptoms, radiofrequency perforation and subsequent balloon dilatation were successfully performed. The implantation of a Palmaz iliac stent led to a predictable communication between the right ventricle and pulmonary artery.
Ductus arteriosus rupture as a balloon catheter atrioseptostomy complication
Authors: Caixeta Adriano Mendes , Kajita Luis Junya , Rati Miguel , Violante R. , Aiello Vera , Snitcowsky Rachel , Antônio Perin Md Marco , Veloso Walkimar U. , Ariê Siguemituzo 
Published: March 2007

AbstractA newborn with transposition of the great arteries presented with rupture of the ductus arteriosus after balloon catheter atrioseptostomy. The necropsy study demonstrated persistent ductus patency, and a 0.5‐cm‐long horizontal fissure could be observed. On microscopy, there was laceration of the intimal layer, with wall dissection and focal hemorrhage extending to the adventitia. Ductus rupture was attributed to the wall weakess, as a consequence of prostaglandin E1 administration.
In vivo comparison of different quantitative edge detection systems used for measuring coronary arterial diameters
Authors: Desmet Walter , De Scheerder Ivan , Beatt Kevin , Huehns Tanya , Piessens Jan 
Published: March 2007

AbstractThree different systems for quantitative coronary analysis [Cardiovascular Measurement System (CMS®); Polytron 1000® Angiographic Workstation (AWOS®)] were compared in 109 patients before and after coronary angioplasty and at follow‐up coronary angiography. Correlation coefficients were low and 95% limits of agreement were wide. In general, CMS® exhibited a tendency to yield lower values for very small diameters and higher values for larger vessels. The acute gain in minimal luminal diameter was considerably smaller when assessed by AWOS® as compared to Polytron® (0.52 vs. 0.71 mm, P < .0001) and to CMS® (0.52 vs. 0.75 mm, P < .0001). Long‐term gain was much larger when assessed by Polytron® as compared to AWOS® (18.8 vs. 11.5%, P < .001) and it was almost double for CMS® as compared to AWOS® (20.7 vs. 11.5%, P < .0001). In conclusion, in the individual patient very different results can be obtained when different QCA systems are used, and systematic differences between the systems are encountered.
Prolonged urokinase infusion for chronic total native coronary occlusions: Clinical, angiographic, and treatment observations
Authors: Ajluni Steven C. , Jones Denise , Zidar Frank , Puchrowicz Sylvia , Margulis Ann , O'Neill William W. , Grines Cindy L. 
Published: March 2007

AbstractProlonged intravascular infusion of urokinase has proven beneficial in reestablishing patency of chronically occluded peripheral arteries and saphenous vein grafts. This study was performed to assess the efficacy and safety of prolonged urokinase infusions as a prelude to angioplasty in chronically occluded native coronary arteries, that had failed standard angioplasty techniques. Twenty‐five patients with objective evidence for ischemia in the distribution of a chronic coronary occlusion were referred for percutaneous intervention. Patients were assessed for any potential exclusions from lytic therapy. Urokinase infusion through both a SOS wire and a stable guiding catheter was continued at 100,00–240,000 units/hr for 8–25 hr; patents then underwent attempted balloon angioplasty. Mean duration of urokinase infusion was 20.6 ± 7.7 hr (total dose 163,000 ± 52,447 units/hr). Fibrinogen levels dropped slightly with this (300 ± 129 to 203 ± 81 mg/dl, P = 0.02). Angiography posturokinase showed improvement in 7 (28%) with regard to coronary flow (± 1 TIMI‐grade). Angioplasty was successful in 13 (52%), with final angiographic result revealing thrombus in 5 (20%), or dissection 8 (32%). The infusions were well‐tolerated with a low incidence of chest pain, 2 (8%); or ischemic ECG response, 2 (8%); myocardial infarction, 2 (8%); or significant bleeding 2 (8%). All patients survived the procedure, with a length‐of‐hospital stay = 5.1 ± 4 days. Use of prolonged preangioplasty intracoronary urokinase infusion can be done safely with success in roughly one‐half of patients with chronic total native coronary occlusions who have failed prior attempts at percutaneous intervention. A larger more rigorously designed protocol is required to make specific recommendations about technique, cost, and long‐term follow‐up.
Transluminal extraction catheter for the treatment of diseased saphenous vein grafts: A multicenter experience
Authors: Meany Thomas B. , Leon Martin B. , Kramer Barry L. , Margolis James R. , Matthews Ray V. , Whitlow Patrick L. , Moses Jeffrey W. , Knopf William D. , Tommaso Carl L. , Sketch, Jr Michael H. , O'Neill William W. 
Published: March 2007

AbstractTo evaluate the efficacy, safety, and long‐term results of atherectomy using the Transluminal Extraction catheter (TEC®), patients with diseased saphenous vein grafts were enrolled in a prospective nonrandomized trial. Patients were followed to hospital discharge for acute complications and underwent routine 6‐mo reevaluation with repeat cardiac catheterization to assess restenosis.Atherectomy was performed on 650 graft lesions in 538 consecutive patients (male 81%; mean age 66 yr; range 37–81). Mean graft age was 8.3 yr; (range 0.3–20) with 85% of grafts > 3 yr of age. Complex lesion morphology included thrombus (28%), ulceration (13%), and eccentricity (50%). Lesion success was achieved in 606 lesions (93%) with clinical success in 479 patients (89%). Lesion success was achieved in 90% of thrombus containing lesions, 97% of ulcerated lesions, and 97% of grafts > 3 yr. Complications included nonfatal myocardial infarction in 4 (0.7%) of patients, emergency bypass surgery in 2 (0.41%), and in‐hospital death in 17 patients (3.2%). Angiographic follow‐up at 6 mo was obtained from 268 lesions in 227 patients. The overall lesion angiographic restenosis rate was 60%.TEC® atherectomy can be performed in patients with diseased saphenous vein grafts with high primary success and low complication rates. It is suitable for use in aged grafts, particularly in the presence of thrombus and ulcerations, and may be superior to balloon angioplasty alone in this group of patients.
Treatment of acute stent thrombosis with local urokinase therapy using catheter‐based, drug delivery systems: A case report
Authors: Mitchel Joseph F. , McKay Raymond G. 
Published: March 2007

AbstractAbrupt thrombotic stent closure remains a difficult problem to treat in the cardiac catheterization laboratory. A 63‐yr‐old white female initially underwent successful placement of a Palmaz‐Schatz biliary stent in the proximal RCA following failed coronary angioplasty. One week later, the patient represented with an acute inferior infarction and thrombotic occlusion of the stent site in spite of adequate anticoagulation. A new, local drug infusion catheter (the Dispatch™ catheter) was placed at the angioplasty site and 150,000 units of urokinase were locally infused, with immediate restoration of normal distal flow and a subsequent marked decrease in angiographic thrombus. A small, residual thrombotic filling defect was further treated with a urokinase‐coated hydrogel balloon (Hydro Plus™). Following local urokinase delivery with the Dispatch catheter and hydrogel balloon, there was complete resolution of angiographic thrombus with TIMI 3 flow and no evidence of distal embolization or no‐reflow. Local urokinase delivery directly to the site of thrombus with catheter‐based drug delivery systems may be a useful technique for rapidly lysing intracoronary clot and re‐establishing coronary flow in the setting of acute stent thrombosis.
Randomized evaluation of six French Voda‐type guiding catheters for left coronary artery balloon angioplasty
Authors: Hoang Vincent , Urban Philip , Chatelain Pascal , Metz Damien , Camenzind Edoardo , Brzostek Tomasz , Rutishauser Wilhelm 
Published: March 2007

AbstractIn order to evaluate 6 French (6F) Voda‐type guiding catheters for left coronary artery balloon angioplasty, we randomized the choice of the guiding catheter in 100 consecutive patients between a Voda (group 1, n = 50) and a Judkins or Amplatz curve (group 2) guiding catheter. Angioplasty success rate (98% for both), need for guiding catheter crossover exchange (2 in group 1 vs. 1 in group 2), fluoroscopy time, and volume of injected contrast were similar in both groups, but the operator's appreciation of good back‐up support was better with the Voda‐type guiding catheter (90% vs. 74%, P < 0.05). No complications attributed to the guiding catheter were noted in either group. Efficiency of the Voda‐type guiding catheter appeared similar for both left anterior descending (n = 35, success rate 100%) and circumflex (n = 18, success rate 94%) coronary artery angioplasty.Voda‐type guiding catheters are an efficient and safe approach to routine left coronary angioplasty. They appear to be as effective as a choice bewtween a Judkins or an Amplatz configuration and could be of particular use when a double angioplasty of the left anterior descending and circumflex arteries is attempted during the same procedure. © 1995 Wiley‐Liss, Inc.
Safety of coronary ultrasound angioplasty: Effects of sonication on intact canine coronary arteries
Authors: Rosenschein Uri , Rozenszajn Leon A. , Bernheim Joel , Keren Gad , Alter Ariela , Frimerman Aron , Laniado Shlomo , Roth Arie , Miller Hylton I. 
Published: March 2007

AbstractThe purpose of this work was to examine in vivo the safety of sonication in the coronary arteries in a live animal model. In intact dogs (n = 8), balloon dilatation was performed on the proximal left anterior descending artery (LAD) followed by sonication to the left circumflex artery (LCX) in power levels found to be optimal for thrombus ablation. Postdilatation and post‐ultrasound coronary angiography, echocardiography, histopathology, CK‐MB, indices of hemolysis, and coagulation were compared. Sonication did not induce changes in the ECG or blood pressure. Coronary angiography revealed no adverse side effects or change in arterial diameter (2.3 ± 0.7 vs. 2.4 ± 0.3 mm). Echocardiography showed transient opacification of the myocardium. Histopathology revealed a comparable minimal degree of endothelial denudation. After sonication there were no changes in the level of CK‐MB (312 ± 168 vs. 283 ± 207 IU), hemoglobin (11.3 ± 0.9 vs. 12.7 ± 1.1 gr%), haptoglobin (479 ± 136 vs. 451 ± 121 mg/dL), fibrinogen (142 ± 18 vs. 165 ± 28 mg%), partial thromboplastin time (17.3 ± 3.2 vs. 17.6 ± 3.4 sec), prothrombin time (13.3 ± 7.8 vs. 11.5 ± 2.9 sec), and degree of platelet aggregation (55 ± 17 vs. 62 ± 8%). Thus, the data suggest that transluminal coronary sonication exerts no overt adverse effects in vivo. © 1995 Wiley‐Liss, Inc.
Transhepatic central venous access for cardiac catheterization and radiologic intervention
Authors: Johnson Jeffrey L. , Fellows Kenneth E. , Murphy John D. 
Published: March 2007

AbstractWe describe a technique of direct puncture and catheterization of the hepatic veins for cardiac catheterization and radiologic intervention in children who lack conventional access routes. Four patients underwent eight direct hepatic vein punctures to allow cardiac catheterization (3 patients) and 5–12 F sheath insertions for balloon dilatation of hepatic vein stenoses (1 liver transplant patient). Gelfoam was injected in the sheath tract for hemostasis. All procedures were successful, including five hepatic vein dilatations and right heart access for three cardiac catheterizations. There were no complications. When conventional venous access is precluded, direct percutaneous catheterization of hepatic veins is easy, effective, and probably low risk. © 1995 Wiley‐Liss, Inc.
Guidewire transection during rotational coronary atherectomy due to guide catheter dislodgement and wire kinking
Authors: Foster‐Smith Karl , Garratt Kirk N. , Holmes David R. 
Published: March 2007

AbstractRotational coronary atherectomy is an effective treatment for calcified ostial lesions. We report a case of guidewire transection during rotational atherectomy of a right coronary artery ostial stenosis. Guide catheter dislodgement appeared to have caused prolapse and kinking of the guidewire. Advancement of the burr over the kinked wire resulted in transection. The wire fragment was retrieved successfully using an inflated fixed‐wire balloon catheter. This report illustrates the importance of excellent coaxial guide catheter alignment with rotational atherectomy and suggests that operators be vigilant to possible damage to the radiolucent rotational atherectomy guidewire. © 1995 Wiley‐Liss, Inc.