bluuebunny/crossref_metadata_2025_split huggingface dataset:
Initial and late results of coronary angioplasty for early postinfarction unstable angina
Authors: Gottlieb Sidney O. , Walford Gary D. , Ouyang Pamela , Gerstenblith Gary , Brin Kenneth P. , Mellits E. David , Riegel Mary Beth , Brinker Jeffrey A. 
Published: March 2007

AbstractUnstable angina that occurs in the early postinfarction period is associated with an increased incidence of unfavorable cardiac events despite aggressive medical therapy. We examined the results of coronary angioplasty in 47 consecutive patients with postinfarction unstable angina who were referred for the procedure 12.9 ± 7 days following myocardial infarction, 14 of which were Q wave and 33 of which were non‐Q‐wave. Coronary angioplasty was performed on a total of 55 arteries with a mean predilatation stenosis of 95 ± 8%. These included 46 infarct‐related arteries and nine noninfarct arteries. Double‐vessel angioplasty was performed in eight patients. Successful coronary angioplasty (greater than 30% reduction of predilatation stenosis) was achieved in 43 patients (91%), with a mean residual stenosis of 33 ± 28%. There was one in‐hospital death, one patient required emergency bypass surgery, and two patients had early reocclusion resulting in myocardial infarctions. The 39 patients who had successful angioplasty procedures and who were discharged from the hospital without an unfavorable outcome were followed for 16.3 ± 7 months, and repeat coronary angioplasty was required in five patients from 45 to 105 days after the initial procedure. Two patients had subsequent elective bypass surgery, one had a recurrent myocardial infarction, and one patient had a noncardiac death. For selected patients with suitable coronary anatomy, coronary angioplasty appears to offer an efficacious therapeutic option for early postinfarction unstable angina.
Eosinophilic heart disease presenting with features suggesting hypertrophic obstructive cardiomyopathy
Authors: Miller William , Walsh Richard , McCall David 
Published: March 2007

AbstractWe report a 25‐year‐old female with characteristic features of eosinophilic heart disease on clinical presentation, echocardiography, cardiac catheterization, and LV endomyocardial biopsy. Concomitant physical examination and echocardiographic findings suggesting hypertrophic obstructive cardiomyopathy resolved during treatment with anticoagulation and prednisone therapy.
Endomyocardial biopsy with a modified bioptome introducer sheath: Focus on diagnostic yield and prevention of complications
Authors: Mortensen S. A. , Baandrup U. 
Published: March 2007

AbstractWith a focus directed on the potential diagnostic yield of tissue biopsy in suspected myocardial disease, transvascular endomyocardial biopsies were carried out prospectively in 130 patients. In 149 out of 153 consecutive procedures, where the number of associated major complications was less than 1%, King's bioptome and a specially designed radiopaque long introducer catheter were used. The rather thickwalled sheath had a conical tip which facilitated percutaneous entry and a preshaped distal bending which was particularly useful in the right ventricle for obtaining a steady and safe position in the direction of the interventricular septum.With respect to the histopathological information from an average of 4.2 biopsies per patient, a high clinical yield was gained in 28% of the patients, in the form of specific diagnoses and/or findings influencing subsequent therapy, and useful diagnostic information was gleaned from a further 53%.Thus, the procedure appears safe as a part of routine cardiac catheterization, and biopsy may contribute to a more accurate and clinically relevant classification of a substantial number of patients with suspected myocardial disease.
Value of immediate coronary angioplasty following intracoronary thrombolysis in acute myocardial infarction
Authors: Suryapranata H. , Serruys P. W. , Vermeer F. , De Feyter P. J. , van den Brand M. , Simoons M. L. , Bäaur F. W. , Res J. , van der Laarse A. , van Domburg R. , Beatt K. , Lubsen J. , Hugenholtz P. G. 
Published: March 2007

AbstractA total of 533 patients with acute myocardial infarction of less than 4‐h duration were enrolled in the multicenter randomized trial of intracoronary thrombolysis compared to conventional treatment. In two of the five participating centers, an additional coronary angioplasty immediately after thrombolysis was attempted in 46 patients. According to the treatment allocation and early and late patency of the infarct related vessel, patients were subdivided into three groups: conventionally treated (group A); successful coronary angioplasty following thrombolysis with persistent patent infarct related vessel (group B); and late patency of the infarct related vessel postthrombolytic therapy without angioplasty (group C). The highest global ejection fractions were observed in group B (54% ± 10%) and group C (55% ± 13%), while the lowest ejection fraction was found in group A (47% ± 14%). The sequential changes in global ejection fraction from the acute to the chronic stage was + 4% (p = 0.05) in group B, while no significant changes could be demonstrated in group C. Furthermore, in the group successfully treated by angioplasty, the improvement in global ejection fraction was more pronounced and persisted up to three months after the intervention. This was supported by analysis of regional myocardial function of the infarct zone (+16% improvement, p = 0.01). The long‐term clinical follow‐up (median 24 months) of the patients successfully treated by combined procedure of thrombolysis and angioplasty (group B) was most favourable with a lower incidence of re‐infarction (6%), and late coronary bypass surgery (13%) and/or (re)‐percutaneous transluminal coronary angioplasty (3%) was performed less frequently.These results suggest that reperfusion may need to be supplemented by additional revascularization procedures in order to optimize the chances of obtaining full functional recovery and so to improve the prognosis.
Comparison of visual estimate with digital caliper measurement of coronary artery stenosis
Authors: Schweiger Marc J. , Stanek Ed , Iwakoshi Kenny , Hafer Jesse G. , Jacob Andrew , Tullner William , Gianelly Ralph E. 
Published: March 2007

AbstractWe compared visual estimate and digital caliper measurement of coronary stenoses, utilizing both a 50% and 70% diameter reduction as a definition of significance and both experienced angiographers and cardiology fellows as readers. Ten angiograms were interpreted twice, using the different methods, by four readers, two months apart. The angiograms were divided into 12 vessel segments. Stenoses were judged more severe by visual estimate in 11 segments. Seven of twelve segments had significant differences between readers using the visual estimate, but no significant differences were obtained using caliper measurements. Variability was highest for fellows using the visual method. Interobserver agreement was highest using the digital caliper and the 70% criteria. Intraobserver agreement was most dependent on the amount of time taken in film interpretation. The digital caliper appears to be preferable in interpreting angiograms, particularly for cardiology fellows.
Left ventricular diastolic filling abnormalities in left anterior descending disease
Authors: Lavine Steven J. , Dennenberg Barry S. , Bove A. Alfred , Spann J. F. 
Published: March 2007

AbstractReduced left ventricular diastolic filling (Df) has been noted in coronary disease (CD) patients with normal left ventricular systolic function (NLVF). However, previous studies have included patients with regional wall disease, hypertension, or left ventricular hypertrophy. In the absence of these factors, only a subgroup of patients who had >75% luminal obstruction of the left anterior descending artery (LAD) demonstrated DF abnormalities. Using 60 frames/sec biplane contrast ventriculography, we evaluated the left ventricular filling curve and its derivative in 21 patients with normal coronary arteries and NLVF (group 1), 17 CD patients with NLVF and no LAD disease (group 2), and 18 patients with LAD disease and NLVF (group 3). The peak filling rate (PFR) as end diastolic volumes/sec (EDV/S) was reduced in group 3 patients (group 3: 3.00 ± 0.51 EDV/S vs group 1: 3.59 ± 0.84 EDV/S, p <.05; and group 2: 3.61 ± 0.91 EDV/S, p <.05). There was marked overlap in the Pfr's between the normal and LAD group. DF may be normal in CD patients with NLVF in the absence of LAD disease. LAD patients have abnormal DF, but these abnormalities lack predictive valve.
Analysis of the position of the left ventricular apex and base during systole
Authors: Nogueira Eduardo A. , Carvalhal Silvio S. , Macmillan Robert M. , Maranhao Vladir 
Published: March 2007

AbstractThe relative positions of the left ventricular apex and base in end‐diastole (ED) and end‐systole (ES) were determined in a group of normal individuals using cross‐sectional echocardiography (group A) and in a group of patients with normal hemodynamics and angiographic parameters using cine‐computed tomography (group B). In both groups no change was detected in the position of the epicardial aspect of the apex from ED to ES. The base moved in direction of the apex by 10.2% ± 1.9% (mean ± standard deviation) of the longitudinal dimension of the chamber in group A and by 12.9% ± 5.1% in group B. In both groups the apical cavity was obliterated by the peri‐apical walls. Apical obliteration is responsible for the apparent movement of the apical segment seen in cineventriculography.
The usefulness of the lateral projection in the assessment of the right coronary artery during percutaneous transluminal coronary angioplasty
Authors: Goldbaum Thomas S. , Disciascio Germano , Cowley Michael J. , Vetrovec George W. 
Published: March 2007

AbstractOptimum coronary angiographic definition of lesion morphology and side branch orientation is important during percutaneous transluminal coronary angioplasty (PTCA) to enhance the ease and safety of guidewire passage. This study was performed to compare the efficacy of the lateral (LAT) projection to conventional angiographic views for right coronary artery (RCA) evaluation pre‐ and post‐PTCA. In 45 consecutive patients undergoing PTCA of 56 RCA lesions, the LAT was available to evaluate 40 lesions pre and 44 lesions post‐PTCA. Angiographic comparison of the LAT versus standard LAO, LAO cranial, and RAO views were performed by two experienced angiographers with consensus reading. The LAT was the best projection for assessing lesion morphology pre‐PTCA in 19/40 (48%) and in 19/44 (43%) post‐PTCA, while the LAT was significantly better (P < 0.01) than standard views for assessing side branch orientation (48/56, 86%) and post‐PTCA intimal disruption (18/33, 55%). In addition, LAT was the best view for assessing mid RCA lesions 13/21 (62%) pre‐PTCA and 12/27 (44%) post‐PTCA, while post‐PTCA intimal disruption was best detected by LAT in 14/24 (58%). Lesions only recognized in the LAT view occurred in five instances, four involving right ventricular branch ostia and one involving the proximal posterior descending. Thus, the LAT projection appears helpful during PTCA to assess lesion morphology, eccentricity, side branch orientation, and intimal disruption pre‐ and post‐PTCA as an adjunct to conventional views.
The simplified formula for the calculation of aortic valve area: Potential inaccuracies in patients with bradycardia or tachycardia
Authors: Hillis L. David , Winniford Michael D. 
Published: March 2007

AbstractSince the Gorlin equation for calculation of aortic valve area is somewhat complicated, a simplified formula has been introduced in which the cardiac output (in liters/min) is divided by the square root of the peak pressure gradient across the valve (in mmHg), yielding a valve area in cm2. This study was done to examine the reliability of this simplified formula in patients with bradycardia or tachycardia. In 68 patients with aortic stenosis, aortic valve area was calculated with both formulae, and the results were compared with one another. In the 43 individuals whose heart rates were 65 to 100 beats/min, the results of the Gorlin equation and the simplified formula showed excellent agreement (absolute percentage difference, 8 ± 8% [mean ± SD]). In contrast, in the 25 patients whose heart rates were < 65 or > 100 beats/min, the absolute percentage difference between the results of the two formulae was 18 ± 13% (p < 0.001). Although the results of the two equations were especially likely to be disparate in these patients, there was no predictable relationship between them. Thus, in patients with bradycardia or tachycardia, the simplified formula should be utilized with caution and cognizance of its potential inaccuracy.
Guide wire entrapment during PTCA: A potentially dangerous complication
Authors: Lotan Chaim , Hasin Yonathan , Stone David , Meyers Stuart , Applebaum Azai , Gotsman Mervyn S. 
Published: March 2007

AbstractThe tip of a “high‐torque” floppy guide wire became entrapped in a coronary artery during elective PTCA in four patients. In two it was removed through the guiding catheter, in the third an operative intervention was needed in order to free the wire, and in the fourth the remnant was left in situ.Interventional cardiologists should be aware of this potential complication.
Total occlusion of the left main coronary artery in chronic stable angina pectoris
Authors: Sudhir Krishnankutty , Abraham Abraham K. , Cherian Maman K. , Reddy Narasimha K. , Gupta Srikrishna 
Published: March 2007

AbstractWe present the clinical and angiographic profile of three patients with class 1 stable angina pectoris. All had strong coronary risk factors, and stress testing was positive in stage one of the Bruce protocol. Coronary angiography revealed total occlusion of the left main coronary artery (LMCA), and aortocoronary bypass surgery was performed. Thus, total LMCA occlusion may be an unexpected angiographic finding in patients with class 1 angina.
Origin of the right coronary artery from the descending thoracic aorta: Angiographic diagnosis and unique coronary artery anatomy at autopsy
Authors: Cheatham John P. , Ruyle Nanci A. , McManus Bruce M. , Gammel George E. 
Published: March 2007

AbstractAn infant born at term with hypoplastic left heart syndrome was found angiographically to have an anomalous artery arising from the descending thoracic aorta which supplied the posterior and right coronary branches. Morphologically, the right coronary artery had atypical and striking elastotic changes and wall thickening.
Simultaneous cannulation: A technique for percutaneous transluminal coronary angioplasty of chronic total occlusions
Authors: Sherman C. Todd , Sheehan Dennis , Simpson John B. 
Published: March 2007

AbstractThree patients with indications for percutaneous transluminal angioplasty of a totally occluded coronary artery also had distal opacification by a collateral vessel. The balloon catheter and guide wire were manipulated proximally through the guide catheter. With a second catheter, angiography of the collateral vessel opacified the occluded artery distal to the obstruction. In all three cases, simultaneous catheterization was safe and aided our assessment of distal vessel contour, length of occlusion, and the intraluminal position of the wire beyond the complete obstruction. We conclude that this technique may improve success rates for dilating chronic total obstructions by allowing safer manipulation of less flexible wires.
The design and clinical application of a new #5 French angioplasty catheter
Authors: Wholey Mark H. 
Published: March 2007

AbstractAlthough major technological advances have occurred in coronary artery angioplasty balloons and steerable wire systems, there have been surprisingly few advances in the development and designs for balloons in the peripheral circulation. For example, a #7 French shaft has become the standard for most peripheral as well as visceral angioplasty balloons. In most instances, the shaft is unnecessarily large and not only interferes with tractability over the conventional wire but in certain situations is also unnecessarily traumatic to the vascular intima as the catheter is passed to the angioplasty site. For these reasons a newly designed catheter with a shaft measuring 1.67 mm (#5 French) has been designed to incorporate a variety of dimensional balloons varying from 2 mm through 7 mm. In addition, the open end allows passage of a. 035 inch wire and consequently the balloon is ideally suited for applications from vessels as small as the tibial circulation or renal visceral or iliac circulation.
Factors that predict improvement in left ventricular ejection fraction after coronary angioplasty for acute myocardial infarction
Authors: Brodie Bruce R. , Weintraub Richard A. , Hansen Charles J. , Miller Paula F. , LeBauer E. Joseph , Katz Jeffrey D. , Stuckey Thomas D. 
Published: March 2007

AbstractAcute and follow‐up angiograms were analyzed in 75 patients with acute myocardial infarction treated with emergency coronary angioplasty to determine factors that might predict improvement in left ventricular ejection fraction. Ejection fraction improved 8.4 ± 8.2% in 60 patients who maintained patent infarct vessels at follow‐up angiography, compared with −4.1 ± 6.0% in 15 patients who developed reocclusion (p <.001). In patients with patent infarct vessels, univariate analysis revealed the following significant predictors of improvement in ejection fraction: initial ejection fraction (r = −.38, p <.003), subtotal vs total stenosis (12.9 ± 9.3% vs 6.9 ± 7.3%, p <.02), infarct vessel (left anterior descending 11.0 ± 8.4%, right 6.8 ± 6.4%, circumflex 2.6 ± 7.5%, p <.02), and time to follow‐up study (≤ 15 days vs > 15 days) (4.8 ± 5.8% vs 9.8 ± 8.6%, p <.03). Reperfusion time (≤2 hr vs >2 hr) predicted improvement when subtotal stenoses and stuttering infarctions were excluded (10.6 ± 7.0% vs 4.9 ± 6.9, p <.03). Multivariate analysis showed initial ejection fraction and subtotal vs total stenosis to be independent predictors.Patients with anterior infarctions, low initial ejection fractions, and subtotal stenoses or reperfusion times ≤2 hr are likely to benefit most from coronary angioplasty for acute myocardial infarction.
Management of coronary occlusion during angioplasty: Stabilization using a guide wire
Authors: Tommaso Carl L. , Singleton Robert T. 
Published: March 2007

AbstractDuring percutaneous transluminal coronary angioplasty of the left anterior descending artery in two patients, although the artery could be initially dilated, the vessel would not remain patent despite numerous redilations and pharmacological maneuvers. A third patient developed total occlusion of the right coronary artery during diagnostic catheterization. In these patients, the presence of a guide wire across the occlusion provided patency and stability. With the guide wire in place, the patients were taken to the operating room without further chest pain or evidence of ischemia.
Subacute left main coronary stenosis following percutaneous transluminal coronary angioplasty
Authors: Haraphongse Mant , Rossall Richard E. 
Published: March 2007

AbstractSubacute left main coronary stenosis following percutaneous transluminal coronary angioplasty (PTCA) is an uncommon but recognized complication of the procedure. This report describes a case of left main coronary stenosis, which occurred 6 months following PTCA of an angulated, eccentric, proximal (adjacent to the left main stem) left anterior descending artery stenosis. Angiographically demonstrated morphology of complicated coronary stenosis adjacent to the left main coronary artery may represent a risk factor threatening major complications of PTCA. Detailed evaluation of angiographic coronary anatomy may improve patient selection and reduce the likelihood of such complications.
Pulmonary varix associated with mitral valve disease
Authors: Narula Jagat , Talwar K. K. , Bharani Anil , Mukhopadhyaya S. , Rajani M. , Bhatia M. L. 
Published: March 2007

AbstractA case of pulmonary varices with mitral valve disease is presented with a detailed review of the literature. Two distinct categories of the disease, with and without left artrial hypertension, are emphasized.
Percutaneous transluminal angioplasty involving internal mammary artery bypass grafts: A femoral approach
Authors: Pinkerton Cass A. , Slack John D. , Orr Charles M. , Vantassel James W. 
Published: March 2007

AbstractPercutaneous transluminal coronary angioplasty is an effective technique for the treatment of selected patients with ischemic heart disease due to coronary artery stenosis. Successful angioplasty in saphenous vein bypass grafts has been documented, but little experience has been reported using angioplasty in internal mammary artery to coronary artery bypass grafts. Nine of ten patients with stenosis in the internal mammary artery to coronary artery anastomosis or in the coronary vessel distal to the anastomosis site were successfully treated with angioplasty. One patient developed restenosis 1 month after the procedure, and a repeat angioplasty was successful. In one patient, the balloon catheter could not be advanced through the left internal mammary artery to the stenosis site. Technical features of internal mammary artery angioplasty are discussed, including the use of specially designed guiding wires, guiding catheters, and balloon catheters that facilitate angioplasty involving internal mammary arteries from the femoral approach.
Percutaneous brachial catheterization: The hidden hazard of high brachial artery bifurcation
Authors: Deligonul Ubeydullah , Gabliani Gregory , Kern Morton J. , Vandormael Michel 
Published: March 2007

AbstractWe describe a patient in whom a brachial arterial cutdown done at the same site for percutaneous transluminal angioplasty immediately after uncomplicated percutaneous brachial coronary arteriography revealed the percutaneous sheath in a deeper, smaller, and more lateral artery than the brachial artery, complicating placement of the guiding catheter. This case illustrates the potential hidden hazard of normal brachial artery bifurcation variants, which may be responsible for some of the potential complications encountered in percutaneous brachial artery catheterization techniques.
Technique for closure of the small patent ductus arteriosus using the rashkind occluder
Authors: Benson L. N. , Dyck J. , Hecht B. 
Published: March 2007

AbstractPercutaneous transcatheter closure of the patent ductus arteriosus has become a clinically viable procedure in childhood due to the pioneering work of Rashklnd and Mullins. Presented is a modification of the technique to accomplish catheter closure in the small ductus arteriosus.
Blood velocity measurements during selective coronary angiography before and after percutaneous transluminal coronary angioplasty
Authors: Nishimura Rick A. , Holmes David R. , Bove Alfred A. , Julsrud Paul R. , Ritman Erik L. 
Published: March 2007

AbstractThe velocity of blood flowing down a coronary artery may provide an index of myocardial perfusion, independent of the need for measuring the amount of myocardium supplied by a vessel. The velocity of the leading edge of contrast material was therefore measured before and after percutaneous transluminal coronary angioplasty in 15 patients utilizing digitized images from routine coronary angiography. The velocity (mean ± SD) before percutaneous transluminal coronary angioplasty in the 15 patients was 11.9 ± 6.0 cm/s, increasing to 21.7 ± 8.7 cm/s after (P < 0.01). There was a correlation between the percent change in velocity and the change in percent stenosis before and after percutaneous transluminal coronary angioplasty (r = 0.65; P < 0.001). The mean absolute interobserver and intraobserver variabilities for the velocity measurements were 2.1 and 1.8 cm/s, respectively. Measurement of coronary flow velocity from data obtained at the time of routine coronary angiography is an easily performed reproducible technique, which may be used to assess the results of an intervention such as percutaneous transluminal coronary angioplasty.