bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ruptured aneurysm of the sinus of valsalva with single coronary artery
Authors: Goto Yasutoshi , Matsuno Yoshio , Yoshikane Hideki , Murakmi Rinji , Morioka Shigefumi , Moriyama Katsutoshi , Yamada Kinya 
Published: March 2007

AbstractThis paper will report the case of a patient with an aneurysm of Valsalva's sinus accompanied by single coronary artery (the presence of only a single ostium of the coronary arteries), who survived for 14 years, under conservative treatment, after a rupture of the aneurysm. In this patient the aneurysm of Valsalva's sinus ruptured from the right coronary sinus into the right ventricular outflow tract. The single coronary artery originated from the left coronary sinus, and the right coronary artery branched from the left main trunk and ran dorsally to the aorta. No case of ruptured aneurysm of Valsalva's sinus accompanied by a single coronary artery has been reported in the literature. After 14 years of conservative treatment, the patient was surgically treated by direct suture of the ruptured aneurysm and by aortic valve replacement. The postoperative course was uneventful.
Transient acute severe aortic regurgitation complicating balloon aortic valvuloplasty
Authors: Sadaniantz Ara , Malhotra Rahul , Korr Kenneth S. 
Published: March 2007

AbstractTransient, acute severe aortic regurgitation documented by hemodynamic and Dopplerechocardiographic assessment was observed in an elderly woman immediately following balloon aortic valvuloplasty for critical aortic stenosis. Aortic regurgitation responded to medical therapy and resolved within 24 hr. Potential mechanisms are discussed. We suspect that an oversized balloon to aortic ring area stretched the annulus, separating the valve cusps and resulting in severe regurgitation, which rapidly normalized.
Open‐Ended guidewire: New technique for balloon angioplasty of chronically occluded coronary arteries
Authors: Vassanelli C. , Turri M. , Morando G. , Menegatti G. , Zardini P. 
Published: March 2007

AbstractChronic total coronary occlusion is a growing indication to percutaneous transluminal coronary angioplasty. Since primary success of balloon angioplasty in this condition is usually limited by the difficulty of crossing the occlusion, different techniques have been described for this purpose, such as use of stiff guidewires, coronary infusion catheters, guidewires with an olive‐shaped tip, or new developing methods (atherectomy, laser), in association with balloon dilatation.Here, we describe our initial experience with a thick (0.035 in) and relatively stiff open‐ended guidewire, which has an inner (0.018 in diameter) lumen provided with a core wire. Several advantages are considered. The core wire yields a perfect means of steerability of the whole system, while pushability of a thicker guidewire is much greater. Moreover, the core wire can be removed, and contrast injections beyond the occlusion through the inner lumen can assure proper intraluminal location. Finally, position across the occlusion can be kept easily, since an exchange wire for conventional balloon catheters can be inserted in the inner lumen of the open‐ended guidewire.
Percutaneous atherectomy of occlusive peripheral vascular disease: Stenoses and/or occlusions
Authors: Dorros Gerald , Lewin Ruben F. , Sachdev Naveen , Mathiak Lynne 
Published: March 2007

AbstractPercutaneous atherectomy was performed using the Simpson Atherocath™ on 131 patients (87 male, 66%) with a mean age of 65 years. Clinical characteristics included evidence of significant coronary disease in 50%, hypertension in 46%, diabetes in 41%, and prior neurologic deficit in 32% of patients. The indication for atherectomy was claudication in 114 (87%) and rest pain, gangrene, or ulcer in 17 patients (13%). Atherectomy was successfully performed in 136/139 stenoses (98%) and in 56/56 occluded vessels with or without prior balloon angioplasty. No serious complications resulting in limb loss or emergency vascular surgery were encountered. Histopathology of retrieved specimens showed that 66% had atheromatous plaque, 45% had tunica media, and 30% had a form of thrombus. Material obtained from an occluded vessel was more likely to have thrombus and tunica media present than that from a stenosis (P < 0.02 and P < 0.05, respectively). Early angiographic follow‐up (mean time, 17 weeks) showed a relatively low (17%) lesion recurrence rate. Percutaneous atherectomy can be successfully utilized in stenotic and occluded peripheral arteries with good success and no serious complications; stenoses appear to have a low recurrence rate.
Difficult deflation of probeTM balloon due to twisting the system
Authors: Hamada Yoshio , Matsuda Yasuo , Takashiba Kiyoshi , Ohno Hiroshi , Fujii Banyo , Ebihara Hironori , Hyakuna Eiji 
Published: March 2007

AbstractWhile using the balloon‐on‐a wire device, we experienced a case of difficult deflation of the ProbeTM balloon system. Blockage of the balloon system was possibly caused by twisting the system to reach and pass the lesion in the branch of left circumflex coronary artery. The duration of inflation was 20 min, causing prolonged ischemia.
A complication of prolonged urokinase infusion into a chronically occluded aortocoronary saphenous vein graft
Authors: Andersen Rolf L. , Kemp Harvey G. 
Published: March 2007

AbstractRecanalization of a chronically occluded aortocoronary saphenous vein graft was performed, using a prolonged intracoronary infusion of urokinase followed by percutaneous transluminal coronary angioplasty (PTCA). Despite an angiographically successful result, the patient developed acute myocardial infarction, presumably secondary to distal migration of partially lysed thrombus. One week after successful angioplasty, the graft was once again proximally occluded.
Percutaneous coronary angioplasty of large venous graft using peripheral dilatation catheter
Authors: Heijer Peter Den , Van Dijk Rene B. , Berg Fred Van Den , Bakhuizen Rene , Lie K. I. 
Published: March 2007

AbstractThe maximum inflated diameters of standard percutaneous transluminal coronary angioplasty (PTCA) balloon catheters can be insufficient if stenoses in oversized venous grafts are to be dilated. As an alternative to the recently described “hugging balloon” technique [1], it seems feasible to use a standard peripheral angioplasty (PTA) catheter with a balloon diameter that is matching to the vessel. Such a procedure calls for a free long‐wire exchange and may be hampered by the stiffness of a PTA catheter. We report a case where this technique, used in an emergency procedure, resulted in a satisfactory angiographic result without causing complications.
Sinus of valsalva aneurysm presenting with complete heart block
Authors: Clark Vivian L. , Hawkins Earl T. , Wendt David J. 
Published: March 2007

AbstractAn elderly woman presented with sudden unresponsiveness and complete heart block and subsequently expired. Postmortem examination revealed an aneurysm of the right sinus of Valsalva impinging on the cardiac conducting tissue. Only a few cases associated with complete heart block have been previously reported.
Prediction of stenotic valve orifice area: An in vitro study on a bioprosthesis
Authors: Schoephoerster Richard , Yearwood Thomas L. , Chandran Krishnan B. 
Published: March 2007

AbstractThe Gorlin equation for the hemodynamic assessment of valve area is commonly used in cardiac catheterization laboratories. A study was performed to test the prediction capabilities of the Gorlin formula, as well as those of the Aaslid and Gabbay formulas for the effective orifice area of a porcine valve of varying degrees of stenosis. Pressure gradient, flow, and valve opening area measurements were performed on Carpentier‐Edwards porcine valve prostheses (made stenotic by suturing at the commissures) mounted in the aortic position of an in vitro pulse duplicator. With the known valve orifice area, a discharge coefficient was computed for each of the three orifice area formulas. After some theoretical considerations, it was proposed that the discharge coefficient would be a function of the flow rate through the valve. The discharge coefficient was observed to increase with increasing systolic flow rate. An empirical relationship of the discharge coefficient as a linear function of the systolic flow rate was determined through a regression analysis, with a different relationship for each orifice area formula. Using this relationship in the orifice area formulas improved the accuracy of the prediction of the effective orifice area with all three formulas performing equally well.
Quantitative regional contraction analysis of cineventriculography: Reporting, filing, and retrieval functions using a personal computer
Authors: Bozzi Giorgio , Verna Edoardo , Skinner Joan M. , Dwyer Mary‐Lynn , Castelfranco Mario 
Published: March 2007

AbstractA new method for the semiobjective evaluation of left ventricular wall contraction is proposed that uses a percent reduction of areas. The calculation model uses orthogonal coordinates, an internal reference system, and the concept of nonuniform reduction of the cavity, with its obliteration at the apex. From a normal patient population (ten males, four females; aged 45 ± 13 years), a “normal reference curve” of contraction was obtained. A second patient group (56 males, two females, aged 56 ± 7 years) with definite contraction abnormalities was then analyzed. A third group (eight males, one female, aged 56 ± 10 years) was studied before and after nifedipine administration (1 mg over 2 min IV). Specific algorithms compare individual patient contraction curves with the normal reference curve and compute the score point system of contraction analysis. Data are automatically codified and filed during introduction. This saves time and allows a rapid retrieval of data grouped under different coded features. These features include the location and type of wall contraction abnormalities. This method of reading ventriculograms has been shown to be in accordance with the diagnosis of experienced observers and can detect small contraction changes that are induced pharmacologically. The method is proposed as a valuable tool for semiobjective evaluation of left ventricle wall contraction and to facilitate data collection in multicenter collaborative studies.
Weighted ventriculographic wall motion score for improved survival prediction in patients with coronary artery disease
Authors: Schwartz Robert S. , Llstrup Duane M. , Vlietstra Ronald E. , Bove Alfred A. , Smith Hugh C. 
Published: March 2007

AbstractGlobal ventricular function parameters such as the ejection fraction and the sum of wall motion scores for segments of the left ventricle are excellent predictors of long‐term survival in patients with coronary heart disease. These are usually determined from a monoplane right anterior oblique view. It was hypothesized that a biplane weighted wall motion score that included the left anterior oblique projection might better predict survival. A new score (BISCORE) was derived for 1,433 Mayo Clinic ventriculograms coded by the methods of the Coronary Artery Surgery Study (CASS). Weighting coefficients for each left ventricular segment were derived by the proportional hazards technique, and this resulted in the equation BISCORE = 120 – (8.6 × anterobasal + 3.4 × basal septum + 2.9 × apical + 2.7 × posterolateral + 2.4*diaphragmatic), which yielded a score from 0 (all segments aneurysmal) to 100 (all segments normal). This score stratified the original 1,433 patients into distinct groups by survival. As a single variable it was better than previous wall motion scores and ejection fraction at predicting survival. When prospectively applied to 5,172 Coronary Artery Surgery Study patients, this new score again proved to be a better predictor of survival than previous unweighted scores.Since the new score contains terms from the left anterior oblique ventriculographic projection, it is concluded that this projection adds information to that of the right anterior oblique projection regarding survival. Furthermore, this weighted score appears more highly associated with survival than unweighted scores.
Left atrial conduit function for left ventricular filling dynamics in patients with myocardial infarction
Authors: Toma Yoichi , Matsuda Yasuo , Moritani Kohshiro , Ryoke Tsutomu , Katayama Kazuhiro , Miura Toshiro , Ogawa Hiroshi , Matsuda Masako , Matsuzaki Masunori , Kusukawa Reizo 
Published: March 2007

AbstractThis study observed the left atrial function in determining filling dynamics of the left ventricle in patients with myocardial infarction. The study consisted of eight control subjects and ten patients with myocardial infarction. The left ventricular filling volume is considered to be composed of the left atrial passive emptying, active emptying, and conduit volumes. The change of left ventricular filling volume was correlated with that of conduit volume (r = .87, P < .01). However, the change of left ventricular filling volume did not have any correlation to those of left atrial passive emptying and active emptying volumes. These results suggested that the left atrial conduit function was important in determining filling dynamics of the left ventricle.
Gastrointestinal hemorrhage as a complication of cardiac catheterization
Authors: Mukerji Vaskar , Comens Steven M. , Alpert Martin A. 
Published: March 2007

AbstractThis report describes three patients who developed the rare complication of gastrointestinal hemorrhage following cardiac catheterization. These cases illustrate the diverse mechanisms by which bleeding may occur. The important predisposing factors appear to be widespread atherosclerosis, prolonged hypotension, and gastrointestinal disease potentially associated with bleeding.
Investigation of the performance of two types of the doppler catheter in vitro
Authors: Hangiandreou Nicholas J. , Toggart Edward J. , Mistretta Charles A. 
Published: March 2007

AbstractThere is considerable interest in the use of Doppler catheters for measuring coronary flow reserve in humans. Two types are currently available, these being models having side‐mounted or tip‐mounted transducers. The performance of these catheters was carefully observed in Silastic tubing perfused with blood by a roller pump. Each catheter was used with two types of positioning wire: a rigid wire and a standard J‐tip guidewire. Linear regressions of velocity vs. flow rate were performed. Both catheters performed well with the rigid wire (r ≥ 0.992). When used with the J‐tip, the end‐mounted catheter suffered decreased performance because of positioning difficulties, while the side‐mounted catheter performance was within 6% of the ideal. Measurements made with the side‐mounted catheter at low flow rates underestimated the expected response for forward flow. Because of the ease of positioning, the side‐mounted catheter is judged to be more useful in measuring flow ratios.
Percutaneous brachial approach for transluminal coronary angioplasty
Authors: Maouad Joseph , Hebert Jean‐Louis , Guermonprez Jean‐LÉOn 
Published: March 2007

AbstractTransluminal coronary angioplasty from the arm is performed generally with cutdown and brachial arteriotomy. We describe a brachial percutaneous technique for coronary angioplasty, almost similar to the femoral one, wtih a special focus on the prevention of induced vasoconstriction.Our preliminary results are satisfactory and without complications: 13 procedures in 11 patients have been performed over a 30 month period, with the sheaths left in place for 4–6 h after the procedure.This method could be an easy alternative to the Sones technique for operators who are essentially familiar with the femoral percutaneous arterial approach.
Study of the performance of 5 french and 7 french catheters in coronary angiography: A functional comparison
Authors: Kohli Ravinder S. , Vetrovec George W. , Lewis Stephen A. , Cole Sharon 
Published: March 2007

AbstractThe functional efficacy of a conventional 7F (high flow) coronary catheter (hand injection) was compared with a 5F (high flow) catheter using hand and powered injection in 29 patients with ischemic heart disease. Patients were randomized to 5F or 7F catheters as the initial catheter. Consecutive comparative coronary angiograms were performed in the 15° right anterior oblique (RAO) view using Judkin's technique. Visual diagnostic grade (Grade 1 = Diagnostic, Grade 2 = Equivocal, Grade 3 = Nondiagnostic), vessel filling, vessel density (using a densitometer and corrected for background), streaming, and dislodgement were all evaluated independently by two experienced angiographers with correlation of results. Mean diagnostic grade (1.31 ± 0.48) was significantly better with the 7F compared to 5F (hand) 1.72 ± 0.81 and 5F (power) 2.00 ± 0.71 (P < 0.05) for each. Streaming was seen in 55% of injections with 5F (hand) versus 88.5% with 5F (power) and 20.7% with 7F. Measured vessel density was not different for the two catheters. Coronary injection dislodgement occurred significantly more often with 5F power injections than with hand injection of either catheter. Finally, in 6 (30%) of 20 patients in which the 5F was randomly the second catheter used, the operator had to revert to the 7F catheter in order to obtain adequate images. In conclusion, angiographic quality is reduced with 5F catheters compared to 7F high flow in certain patients. Thus, to achieve optimal diagnostic angiograms, larger lumen catheters may be required during certain procedures initially begun with 5F catheters.
Catheter reperfusion for failed emergency coronary angioplasty without subsequent bypass surgery
Authors: Ciampricotti Renzo , Dekkers Petrus J. W. M. , El Gamal Mamdouh I. H. , Van Der Krieken Antonius M. , Relik Theodorus H. F. M. 
Published: March 2007

AbstractA transluminal intracoronary reperfusion catheter was used in eight patients, seven with acute myocardial infarction and one with unstable angina after failed emergency coronary angioplasty. After placement of the reperfusion catheter across the occlusion, symptoms of ischemia resolved in each patient. Chest pain recurred 3 hr later in a single patient who underwent successful repeat angioplasty. The catheter was withdrawn within 6 hr after introduction. Control coronary angiography showed a patent vessel in all but one. Repeat angioplasty or bypass surgery was unnecessary. During 1 year mean follow‐up time all patients remained free of symptoms. The reperfusion catheter is a safe and effective means of perfusing a coronary artery after failure of thrombolytic therapy and coronary angioplasty in cases where emergency bypass surgery is not performed because operative morbidity is expected to outweigh the benefit of myocardial salvage, or when it cannot be immediately organized.
Cough‐Cardiopulmonary resuscitation in the cardiac catheterization laboratory: Hemodynamics during an episode of prolonged hypotensive ventricular tachycardia
Authors: Miller Brian , Lesnefsky Edward , Heyborne Theresa , Schmidt Betty , Freeman Kathy , Breckinridge Susan , Kelley Kathleen , Mann David , Reiter Michael 
Published: March 2007

AbstractCough‐CPR, a deep rhythmic forceful cough repeated 30–60 times per minute, can be an effective resuscitative technique during emergencies occurring in the cardiac catheterization laboratory. We provide documented evidence on the potential of cough‐CPR to maintain adequate systemic arterial blood pressure and consciousness during malignant ventricular arrhythmias, including the longest cough‐CPR episode (75–90 sec), with continuous hemodynamics recorded. Results in three patients disclose that (1) mean arterial pressure during cough‐CPR was 47–66% of nonarrhythmic baseline at a cough rate of 38–46% of normal sinus rhythm heart rate; (2) mean arterial pressure during hypotensive ventricular tachycardia was 17–60 mm Hg higher with than without cough‐CPR; (3) at comparable diastolic pressures (33 vs. 31 mm Hg), systolic arterial pressure during cough‐CPR was 40 mm Hg higher than basic CPR; and (4) consciousness can be maintained with cough‐CPR during prolonged malignant ventricular arrhythmias. Thus cough‐CPR can be a valuable adjunct in maintaining patient stability while definitive therapy for the malignant ventricular arrhythmia is administered.
Percutaneous transluminal coronary angioplasty using a combined “balloon‐on‐a‐wire” system and exchange guidewire technique
Authors: De Marchena Eduardo , Stang R. Brian , Schob Alan , Topaz On , Chakko Simon , Mallon Stephen , Kessler Kenneth M. 
Published: March 2007

AbstractNew balloon‐on‐a‐wire dilation systems allow crossing of severely stenosed coronary arteries owing to their ultra‐low profile. However, these systems do not allow for over‐the‐wire exchange to a larger balloon catheter or insertion of perfusion catheters, should the vessel close abruptly during dilation. Therefore, if the need for such catheters arises, the vessel must be left unprotected during attempts to recross the lesion. We describe a new technique using a combined balloon‐on‐a‐wire system and an exchangeable guidewire, which permits the crossing and dilation of severely stenosed coronary arteries, while at the same time offering vessel protection and balloon catheter exchange.
Percutaneous transluminal coronary angioplasty using a steerable guiding catheter: A new technique
Authors: Stefanadis Christodoulos , Kourouklis Costas , Stratos Costas , Kastellanos Stamatis , Toutouzas Pavlos 
Published: March 2007

AbstractA new type of steerable guiding catheter is described for use in percutaneous transluminal coronary angioplasty (PTCA). It is simple to use and externally steerable. The catheter incorporates a steering system by means of which the catheter tip can be made to assume the form of either a right or left Judkins catheter or to be fixed in any intermediate configuration, entirely through external manipulation. We used this new guiding catheter to perform PTCA on 15 patients.Single lesions were found in the left anterior descending branch in seven patients, in the right coronary artery in four, and in the circumflex artery in two, whereas stenosis of a coronary bypass graft was found in two patients. Angioplasty was successful in all cases. There were no complications, during either the procedure or the postoperative hospitalization.The steerable guiding catheter described here may prove useful for PTCA in cases where a conventional catheter cannot be placed accurately or in cases with multi‐vessel coronary disease.
Coronary occlusion after failed closure of coronaro‐pulmonary fistula with detachable balloon
Authors: Meier Bernhard 
Published: March 2007

AbstractAn attempt to occlude a fistula between the right coronary artery and the pulmonary trunk with a detachable balloon resulted in balloon dislodgment and occlusion of the right coronary artery. The dislodged balloon could be retrieved by suction with the help of a guiding catheter for coronary angioplasty.
First use of a 5 french diagnostic catheter as a guiding catheter for percutaneous transluminal coronary angioplasty
Authors: Salinger Michael H. , Kern Morton J. 
Published: March 2007

AbstractWe report the first use of a 5 French thin‐wall, large‐lumen diagnostic angiographic catheter as a guiding catheter for emergency angioplasty with an angioplasty balloon on a wire (PROBE™) for patients with acute circumflex coronary occlusion and hemodynamic compromise.