bluuebunny/crossref_metadata_2025_split huggingface dataset:
Entrapment of an angioplasty balloon catheter: A case report
Authors: Rizzo Thomas F. , Werres Roland , Ciccone John , Karanam Ravi , Shah Shamji 
Published: March 2007

AbstractThis report presents a case in which an angioplasty balloon catheter became entrapped within the lumen of a coronary artery after rupture during percutaneous transluminal coronary angioplasty (PTCA). Prior to this report, balloon rupture had been considered a relatively benign occurrence. However, this case demonstrates that balloon rupture may lead to serious complications.
Saphenous vein graft rupture during percutaneous transluminal angioplasty
Authors: Namay David L. , Roubin Gary S. , Tommaso Carl L. , Warren Stafford G. , Douglas John S. , King Spencer B. 
Published: March 2007

AbstractThree cases (one fatal) of a rare angioplasty complication, vein graft rupture, are presented with a review of the literature. Caution is suggested when oversizing balloons for vein graft dilatation.
Detection and treatment of high‐output cardiac failure resulting from a large hemodialysis fistula
Authors: Reis Gregg J. , Hirsch Alan T. , Come Patricia C. 
Published: March 2007

AbstractHemodialysis fistulas are a cause of high‐output congestive heart failure (CHF). A case is reviewed of a patient in whom surgical correction of an excessively high fistula flow led to resolution of CHF. Bradycardia induced by fistula occlusion (Nicaladoni‐Branham sign) was not present, but transient occlusion did produce a marked decrease in cardiac output.
Comparison of loxaglate with diatrizoate in angiography of the internal mammary artery
Authors: Davies Richard F. , Lemay Michel , Beanlands Donald S. , Morton Brian C. , Chambers R. Jane , Herbert Margaret , Larocque Bernard 
Published: March 2007

AbstractTo compare ioxaglate with the traditional agent diatrizoate, 44 patients scheduled to undergo coronary angiography that included internal mammary artery (IMA) visualization were entered into a randomized double blind‐parallel design protocol. Complete data were collected on 32 out of 44. Four patients were withdrawn because of angiographically normal coronary arteries; seven, because of unsuccessful IMA cannulation; and one, because of an anaphylaxis‐like reaction to ioxaglate. No other serious adverse effects were seen with either agent. The major endpoints were patient and physician assessments of discomfort, rated independently on a 4‐point scale. loxaglate caused significantly less discomfort (n = 17, median rating of “mild discomfort”) than did diatrizoate (n = 15, median rating of “severe discomfort”; P < 0.01); this effect was independent of patient sex, the number of injections, and the volume of dye injected. Radiographic quality was good with both agents. We conclude that ioxaglate is much better tolerated than diatrizoate during angiography of the IMA.
Effects of beta‐adrenergic blockade on nitroglycerin‐induced augmentation of regional coronary blood flow in patients
Authors: Miller John T. , Kern Morton J. , Henry Rodney L. 
Published: March 2007

AbstractAlthough beta‐adrenergic blockade may increase coronary vascular resistance in some patients with severe ischemic heart disease, the effects of beta blockade on the nitroglycerin (NTG)‐induced augmentation of coronary blood flow have not been elucidated. Therefore, systemic hemodynamic and anterior left ventricular regional coronary bloodflow (thermodilution) data were measured during administration of NTG into the left coronary artery, before and 10 min after intravenous propranolol (0.1 mg/kg) in 22 patients. Six patients (Group 1) had normal left coronary arteries and nine (Group 2) had severe coronary artery disease with at least >70% narrowing of the left anterior descending artery. In seven additional patients (three without and four with >70% left anterior descending coronary artery disease), measurements were obtained with constant‐paced heart rates (Group 3). Before beta blockade, NTG (200 mcg) significantly increased anterior regional great‐vein flow [for Group 1, 84 ± 38% (81 ± 20 to 140 ± 60 ml/min); Group 2, 39 ± 41% (61 ± 26 to 83 ± 38 ml/min); and Group 3, 87 ± 55% (75 ± 36 to 144 ± 86 ml/min)]. In Groups 1 and 2, beta‐adrenergic blockade reduced heart rate 10% (p<0.01) but did not affect mean arterial or pulmonary artery pressures. After beta blockade, although control great cardiac vein flow was reduced only for Group 2 (58 ± 23 to 50 ± 15 ml/min, p<0.05), the hyperemic responses to NTG were unaffected (99 ± 47% 46 ± 23%, and 83 ± 73% for the three groups, respectively). These findings indicate that beta‐adrenergic blockade neither potentiates nor attenuates NTG‐induced increases in coronary blood flow and that the concomitant use of beta blockade does not appear to limit NTG‐induced vasodilatory responses in regions supplied by normal or diseased coronary arteries
Mitral valve motion during diastole in patients with complete heart block: Relation of pressure gradients between left atrium and left ventricle
Authors: Matsuda Yasuo , Moritani Kohshiro , Toma Yoichi , Date Toshiaki , Miura Toshiro , Kohtoku Shinya , Ogawa Hiroshi , Matsuda Masako , Matsuzaki Masunori , Kusukawa Reizo 
Published: March 2007

AbstractWe analyzed the high‐fidelity left atrial and left ventricular pressures and the echocardiograms of the mitral valve, left atrium, and left ventricle in patients with complete heart block. During left ventricular diastole, the mitral valve opened, and no pressure gradient was observed between the left atrium and the left ventricle before the left atrial contraction. After the left atrial contraction, the mitral valve closed with persistent higher left ventricular than left atrial pressure. These findings indicated that during the left ventricular diastole in patients with complete heart block, the mitral valve closed after the left atrial contraction, which appeared to be maintained by the pressure gradient between the left ventricle and the left atrium.
Transcatheter retrieval of intracoronary detached angioplasty guidewire segment
Authors: Mikolich J. Ronald , Hanson Michael W. 
Published: March 2007

AbstractA transcatheter technique of removing a detached angioplasty guidewire segment from the diagonal branch of the left anterior descending coronary artery is described. A standard 0.014 angioplasty guidewire was modified into a “snare” apparatus for retrieval of the detached wire segment. The retrieval was successfully accomplished without intimal dissection, plaque hemorrhage, or vessel occlusion.
Hugging balloons: Coronary angioplasty of oversized vessels with side‐by‐side balloons
Authors: Teirstein Paul S. , Johnson Warren L. , Rutherford Barry D. , Hartzler Geoffrey O. 
Published: March 2007

AbstractAngioplasty of large (<4.0‐mm) saphenous vein grafts using the largest available (4.0‐mm) balloon catheters may result in inadequate graft dilatation. To avoid leaving a significant residual stenosis, two balloon catheters can be inflated side by side across the stenosis. Herein, we report two cases where this “hugging balloon” technique was used to achieve wide graft patency.
Axillary vein approach for pulmonic valvuloplasty in infants with iliac vein obstruction
Authors: Sideris Eleftherios B. , Baay John E. , Bradshaw Robert L. , Jones John E. 
Published: March 2007

AbstractRepeated pulmonic balloon valvuloplasty from the axillary vein was performed in two infants with initial transvalvular gradients of 131 and 162 mm Hg. The first angioplasty was performed through the femoral vein and improved the valve gradient in both patients. Because of obstruction of the iliac system the axillary vein approach was used for the second angioplasty. The transaxillary pulmonic valvuloplasty decreased the gradient to acceptable levels, and no complications were noticed. The axillary vein approach can be the alternative to the femoral one in cases with obstructed iliac system or interrupted inferior vena cava.
The paceport catheter: A new pacemaker system introduced through a swan‐ganz catheter
Authors: Simoons M.L. , Demey H.E. , Bossaert L.L. , Colardijn F. , Essed C.E. 
Published: March 2007

AbstractWe describe a new stainless steel, teflon‐coated 2.4 F pacemaker wire with a flexible tip that can be introduced through an extra lumen of a specially designed 7.5 F Swan‐Ganz catheter. The extra lumen opens at 19 cm from the tip of the catheter; this opening can be positioned in the right ventricular cavity. The pacemaker wire can be introduced at the time of insertion of the Swan‐Ganz catheter or later when the need for ventricular pacing arises. The Paceport catheter was tested in 23 patients. Satisfactory ventricular pacing was achieved in 19 patients at thresholds between 0.5 and 4.0 mA (median 2.0 mA). The threshold increased by 1 mA during long‐term pacing (8–24 hr). Attempts to use the pacemaker were abandoned when short runs of ventricular tachycardia developed upon introduction, while an exceptionally high threshold was observed in another patient. The Paceport system is recommended for patients who require hemodynamic monitoring and urgent ventricular pacing.
Use of a satellite‐assisted computer link for long‐distance research collaboration
Authors: Sheehan Florence H. , Dodge Harold T. 
Published: March 2007

AbstractResearch collaboration between investigators located at some distance from each other is not only possible but also feasible. By using satellite‐assisted computer‐to‐computer links, researchers across the United States and overseas work with the staff and facilities of the Cardiovascular Research and Training Center (CVRTC) in the University of Washington, Seattle. This report presents the mechanics, advantages, and results of using such an approach to collaborate with distant colleagues.
Aortic percutaneous transluminal valvuloplasty in elderly patients by balloon larger than aortic anulus
Authors: Rocha P. , Md Baron , Lacombe P. , Bernier A. , Kahn J. C. , Liot F. , Bourdarias J. P. 
Published: March 2007

AbstractTwenty‐four elderly patients (79 ± 7 years) with long‐standing calcified aortic stenosis have been divided in two comparable groups of 12. The first group was treated with 19 mm balloon percutaneous transluminal valvuloplasty, where the balloon diameter was always smaller than the aortic anulus diameter. Peak‐to‐peak aortic valve gradient decreased from 76 ± 32 mmHg to 30 ± 19 (P > .05), and the aortic valve area, calculated by Gorlin formula, increased from 0.40 ± 0.17 cm2 to 0.57 ± 0.17 (P > .05). The second group was treated with a trefoil 25 mm balloon, always larger than the aortic anulus diameter. In this second group, peak‐to‐peak aortic valve gradient decreased from 73 ± 34 mmHg to 23 ± 15 (P > .05), and aortic valve area increased from 0.47 ± 0.14 cm2 to 0.88 ± 0.36 (P > .05), increasing thus more than in group | (P > .05).Clinical tolerance to balloon inflation was not the same according to individual patients but was similar between the two groups; complications were comparable in the two groups. These results suggest that aortic valvuloplasty by trefoil balloon larger than aortic anulus can provide wider aortic valve area without increasing complication rate.
Visualization of isolated conus artery as a major collateral pathway in patients with total left anterior descending artery occlusion
Authors: Md Masakazu Yamagishi , Md Kazuo Haze , Md Jun Tamai , Md Kenichi Fukami , Md Shintaro Beppu , Md Tsuyoshi Akiyama , Md Kunio Miyatake 
Published: March 2007

AbstractTo examine the existence of isolated conus artery (ICA) as a source of collateral circulation, we selectively visualized the ICA in patients with left anterior descending coronary artery (LAD) occlusion using a no. 5 French catheter. One hundred and fifty patients with a total LAD occlusion were selected from 639 consecutive patients who had diagnostic coronary angiography during an 18‐month period; the ICA was found in 45 patients. Among these patients, 30 showed the ICA as a collateral vessel supplying the distal LAD. In nine of these patients, conventional left and right coronary angiography did not reveal any other significant collateral vessels, and the distal LAD was perfused mainly by the collaterals from the ICA. No serious complications such as ventricular fibrillation or myocardial infarction occurred during these procedures. These results indicate that the selective ICA visualization is clinically important when conventional left and right angiography does not demonstrate collaterals to the obstructed LAD.
Percutaneous mitral balloon valvotomy during pregnancy in a patient with severe mitral stenosis
Authors: Palacios Igor F. , Block Peter C. , Wilkins Gerard T. , Rediker Donald E. , Daggett Willard M. 
Published: March 2007

AbstractPercutaneous mitral balloon valvotomy (PMV) was performed successfully in a 41‐year‐old pregnant patient with severe mitral stenosis. The patient had a 21‐week gestation and was severely limited by symptoms resulting from critical mitral stenosis. PMV resulted in a decrease in the diastolic mitral gradient from 26 to 2 mm Hg and an increase in both cardiac output (from 4.2 to 5.7 I/min) and mitral valve area (from 0.7 to 3.7 cm2). She had marked symptomatic improvement, no further heart failure, and a full‐term, normal delivery.This case report indicates that PMV may be the treatment of choice in the management of pregnant patients with incapacitating symptoms caused by severe mitral stenosis.
Technique for guiding catheter exchange during coronary angioplasty while maintaining guidewire access across a coronary stenosis
Authors: Newton C. Mark , Lewis Stephen A. , Vetrovec George W. 
Published: March 2007

AbstractThis case report describes a technique for guiding catheter exchange while angioplasty extended guidewire access is maintained across a coronary artery stenosis with a 245cm‐0.035‐in.‐long wire in the aorta to exchange for a more favorable guiding catheter. The indications, technique, and outcome of a case are described; it illustrates the usefulness of maintaining angioplasty guidewire access in a difficult‐to‐cross coronary stenosis.
Coronary artery dissection secondary to blunt chest trauma
Authors: Md Satish Kohli , Saperia Gordon M. , Waksmonski Carol A. , Md Stephen Pezzella , Singh Frcp Jang B. , Md 
Published: March 2007

AbstractA 38‐yr‐old woman presented with an anterolateral myocardial infarction following blunt chest trauma sustained in a motor vehicle accident. Subsequent cardiac catheterization revealed a large left ventricular aneurysm and angiographic evidence of dissection of the proximal left anterior descending artery. Review of the literature and management are discussed.
Transluminal coronary angioplasty in the treatment of silent ischemia
Authors: Md Patrick Bergin , Myler Richard K. , Shaw Richard E. , Stertzer Simon H. , Clark David A. , Md Colman Ryan , Murphy Ms Mary C. , Rn 
Published: March 2007

AbstractFifty‐four asymptomatic patients with positive thallium exercise tests underwent coronary angiography followed by coronary angioplasty (PTCA), as the primary therapy for silent ischemia. The procedure was technically successful in 89% of these patients. Emergency bypass graft surgery was necessary in 2 (3.6%) and q‐wave myocardial infarction occurred in 1 (1.8%) of these.All fifty‐four patients have been followed for a mean of 35 months since angioplasty. Of the 48 patients with initially successful PTCA, 12 had either clinical restenosis (9/14 or 19%) or a new lesion (3/48 or 6%) during follow‐up, which required a repeat PTCA. At the longest follow‐up, 46 (85%) had been successfully treated with one or more PTCA procedures. Two patients (3.6%) had sustained late q‐wave myocardial infarction and two additional patients reported angina pectoris. There were no deaths.Angioplasty as a primary therapy for silent ischemia appears efficacious, with success and restenosis rates comparable to those in the symptomatic population. Eventfree survival is improved, compared with natural history data for patients with silent ischemia from other studies. Prudent risk/benefit analysis may help to define subgroups most likely to benefit from this intervention.
Brachial artery injury as a complication of cardiac catheterization: Percutaneous transluminal angioplasty and streptokinase as a treatment alternative
Authors: Md Paolo Angelini , Bush Howard S. 
Published: March 2007

AbstractBrachial artery injuries are a well‐described complication of cardiac catheterization. Traditional therapy has involved surgical repair. We report a case treated with baloon angioplasty followed by streptokinase. This procedure may provide a treatment alternative in a select group of patients.
Prolonged selective urokinase infusion in totally occluded coronary arteries and bypass grafts: Two case reports
Authors: Md Louis McKeever , Md Joseph Hartmann , Md Vincent Bufalino , Md Joseph Marek , Md Alan Brown , Md Mark Goodwin , Md Nicholas Stamato , Md John Cahill , Md Michael Colandrea , Md Firouz Amirparviz 
Published: March 2007

AbstractReports are presented demonstrating a technique for dissolving thrombus in coronary arteries and bypass grafts by using prolonged selective infusion of urokinase via an infusion wire. This allows one to pass a steerable guide wire through the culprit stenosis and perform angioplasty on a distal lesion which could not be previously seen.
Late thrombotic occlusion of saphenous vein grafts: Successful recanalization using thrombolytic therapy
Authors: Grill Howard P. , Brinker Fsca Jeffrey A. , Md 
Published: March 2007

AbstractWe report two cases in which thrombosis was the primary cause of vein graft occlusion many years after bypass surgery. Both displayed minimal thrombolysis immediately after a selective infusion of streptokinase but were patent when reimaged hours later. Such therapy may be helpful when graft occlusions are associated with a large volume of thrombus.
Acquired coronary artery fistula: A sign of mural thrombus
Authors: Lucca Michael J. , Tomlinson Gregory C. 
Published: March 2007

AbstractThis is a case report documenting an acquired coronary artery fistula from the left anterior descending artery through a mural thrombus into the left ventricle by serial coronary arteriography. This abnormality may be an early clue to mural thrombus formation and help provide guidance in making therapeutic anticoagulation decisions.
Systolic and diastolic performance in normal human subjects as measured by ultrafast computed tomography
Authors: Wachspress Joseph D. , Clark Neil R. , Untereker William J. , Kraushaar Barbara T. , Kurnik Peter B. 
Published: March 2007

AbstractUltrafast computed tomography (ultrafast‐CT) is a minimally invasive imaging modality with very short acquisition time and excellent anatomic definition. It shows promise of providing precise measurement of right and left ventricular volumes, left ventricular mass, and left ventricular diastolic function with a single test. We expand on the knowledge regarding normal humans by studying ten normal volunteers in the short axis. Cardiac volumes and mass (mean ± 1 S.D.) were as follows: 1) left ventricle: end‐diastolic volume index (mlm2) = 61 ± 15, end‐systolic volume index (ml/m2) = 19 ± 7, stroke volume index (ml/m2) = 43 ± 9, cardiac index (liters/min/m2) = 2.7 ± .5, ejection fraction (%) = 70 ± 7, end‐diastolic mass (g/m2) = 95 ± 15; 2) right ventricle: end‐diastolic volume index (ml/m2) = 76 ± 19, end‐systolic volume index (ml/m2) = 35 ± 13, stroke volume index (ml/m2) = 40 ± 8, cardiac index (liters/min/m2) = 2.6 ± .5, ejection fraction (%) = 55 ± 6. Stroke volume index differed by 1.6 ± 2.0 ml/m2 between ventricles.Measurement of global and segmental left ventricular diastolic function revealed: 1) Peak filling rate (end‐diastolic volumes/second): global = 2.29 ± .40, base = 1.78 ± .49, midventricle = 2.49 ± .57, apex = 3.13 ± .39 (P < .001, base vs. apex; P < .01, base vs. midventricle and midventricle vs. apex); 2) time to peak filling rate (msec): global = 193 ± 24, base = 192 ± 20, midventricle = 194 ± 26, apex = 190 ± 19 (P = NS between levels).Thus, the current study substantiates and expands the accuracy and utility of ultrafast‐CT in providing comprehensive evaluation of systolic and diastolic function in chuman subjects at rest with a single, minimally invasive procedure.
Variability and reproducibility of quantitative left ventricular angiography
Authors: Rigaud M. , Hardy A. , Castadot M. , Rocha P. , Dubourg O. , Delorme G. , Bardet J. , Bourdarias J. P. 
Published: March 2007

AbstractTo evaluate the reproducibility of left ventricular angiography for the assessment of left ventricular (LV) function and regional wall motion, two ventriculographies were performed in the 30° right anterior oblique (RAO) projection, at 15‐minute intervals, in 19 patients undergoing coronary angiography. Heart rate, left ventricular systolic pressure, and end‐diastolic pressure were measured 15 minutes after the first angiography returned to the baseline values (71.0 ± 14.1 vs. 72.2 ± 15.5 beats/minute, 153.6 ± 18.0 vs. 152.8 ± 19.9 mm Hg, 21.7 ± 8.6 vs. 20.9 ± 7.3 mm Hg, respectively). Global and regional LV performance was analyzed by two observers with a computer‐assisted technique. Intraobserver mean variation of end‐diastolic volume and ejection fraction was less than 3% of the control value. Interobserver mean variations for the same parameters were less than 4% of control values. For both observers, there was no significant variation of LV end‐diastolic volume and ejection fraction from one study to the other. Under stable hemodynamic conditions, the mean observed variations were, depending on the observer, 5–6% of the control value for LV end‐diastolic volume and 5% for ejection fraction.Analysis of segmental wall motion was also highly reproducible. The mean intraobserver variation (% of control value) of wall motion ranged from 4.4% to 9.2%, depending on the sectors studied. The mean interobserver variation, whatever the sector, ranged from 6.9% to 13.5%. The mean interstudy variability for both observers ranged from 6.6% to 15%. In conclusion, any change greater than 6% for end‐diastolic volume, 5% for ejection fraction, and 15% for radial shortening should be considered as significant, provided that hemodynamic conditions are unchanged.