bluuebunny/crossref_metadata_2025_split huggingface dataset:
Contrast echocardiography during cardiac catheterization in patients with congenital heart diseases
Authors: Andrade Jose L. , Leal Samira M. Borges , Filho Orlando Campos , Carvalho Antonio C. , Tebexreni Antonio S. , Lima Valter C. 
Published: March 2007

AbstractContrast echocardiography performed during cardiac catheterization has mostly been limited to a few published case reports. We studied 37 patients with congenital heart disease to assess the capability of the method to diagnose cardiac shunts and valve regurgitation. Injections of 5% dextrose in water through an angiographic catheter were made to evaluate septal integrity and valve competence compared with conventional contrast angiography. An overall sensitivity of 93% and specificity of 78% were found. In four cases of atrial septal defect and seven of mitral regurgitation, the sensitivity was 100%. It was slightly lower for eleven cases of ventricular septal defect (91%) and four of patent ductus arteriosus (75%). When assessing aortic, tricuspid and pulmonary valve competence, the method proved to be more sensitive than conventional angiography to detect mild regurgitation. Contrast echocardiography is a sensitive and safe technique that may be used in association with conventional angiography reducing the need for radiographic contrast and ionizing radiation time. © 1993 Wiley‐Liss, Inc.
Early stent occlusion is not always caused by thrombosis
Authors: Heijer Peter Den , van Dijk René B. , Twisk S. Pé M. , Lie Kong I. 
Published: March 2007

AbstractEarly occlusion of intracoronary stents has been exclusively attributed to thrombosis. Using intracoronary angioscopy, we have found 2 patients in whom this common and serious complication of coronary stenting was caused by obstructive intima dissection rather than thrombosis. © 1993 Wiley‐Liss, Inc.
Use of translesional coronary flow velocity for interventional decisions in a patient with multiple intermediately severe coronary stenoses
Authors: Kern Morton J. , Flynn Michael S. , Caracciolo Eugene A. , Bach Richard G. , Donohue Thomas J. , Aguirre Frank V. 
Published: March 2007

AbstractTranslesional pressure gradients are currently not performed routinely for most angioplasty procedures because of the technical limitations. With the use of an 0.18 inch Doppler flow velocity guidewire, coronary flow velocity, both proximal and distal to a lesion, can be easily assessed. In branching arteries, significant lesions are characterized by a ratio of proximal to distal flow velocity of > 1.7, loss of the normal phasic diastolic predominant flow velocity pattern, and/or loss of distal hyperemia.We describe the use of coronary flow velocity in assisting important decision making in a young patient with a recent myocardial infarction and multiple coronary lesions. The decision for angioplasty of the hemodynamically significant stenosis was confirmed by translesional flow velocity measurements. A rational approach to coronary intervention in patients with multiple stenoses of intermediate severity appears to be facilitated by direct measurement of translesional flow dynamics. © 1993 Wiley‐Liss, Inc.
Initial experience with a new balloon‐on‐a‐wire catheter: The bijouTM
Authors: Goy J‐J. , Hofman Eeckhout E. E. , Vogt P. , Beuret P. , Stauffer J.‐C. , Jeanrenaud X. , Kappenberger L. 
Published: March 2007

AbstractThis paper presents our initial experience with a new low‐profile balloon “on‐a‐wire” catheter, the Bijou. The concept of this balloon is to provide an additional side lumen with the advantages of (1) the ability to measure pressure gradient, (2) the possibility of drug infusion, and (3) the ability to advance a steerable guidewire through this side lumen. The balloon has been tested in 15 patients; 14 underwent an elective procedure for stable angina pectoris (with 2 cases of restenosis) and one an emergency angioplasty in a case of acute myocardial infarction. The stenosis was located on the left anterior descending artery in 11 procedures, on the right in 3, on a marginal branch in 2, on the circumflex and a saphenous vein graft in 1. All stenoses could be dilated successfully (residual stenosis <25%). The transstenotic pressure gradient felt from 49±13 mmHg to 7±4 mm Hg after angioplasty. Except for an uncomplicated dissection in 3 patients, no other complication was noted. With this new catheter, the double‐lumen configuration adds the advantages of an “over‐the‐wire” to an “on‐a‐wire” system. © 1993 Wiley‐Liss, Inc.
Percutaneous balloon mitral valvuloplasty: Comparison of double and single (Inoue) balloon techniques
Authors: Rihal Charanjit S. , Nishimura Rick A. , Reeder Guy S. , Holmes David R. 
Published: March 2007

AbstractTo assess relative merits of the double and single (Inoue) balloon techniques of percutaneous balloon mitral valvuloplasty for treating symptomatic mitral stenosis, 33 patients who underwent dilatation with the double balloon were compared retrospectively with 28 who underwent dilatation with the lnoue balloon. There were no baseline differences in mean left atrial pressure, mean mitral gradient, or calculated mitral valve area between the two groups. The procedure was successful in 89% of patients in the double balloon group and in 93% in the lnoue balloon group. Final mitral valve area and absolute increase in mitral valve area were significantly greater in the double balloon group, in which there was a nonsignificant trend toward greater incidence of acute complications. Final left atrial pressure and mitral gradient were not different. Both techniques are useful and safe. © 1993 Wiley‐Liss, Inc.
Rapid development of left main disease after coronary artery bypass grafting for failed angioplasty: A rare cause of postoperative angina
Authors: Kahn Joel K. , Fischer John C. 
Published: March 2007

AbstractWe report a case of failed coronary angioplasty requiring urgent coronary artery bypass graft surgery. The return of angina pectoris early after surgery led to repeat catheterization, demonstrating a rapidly progressive stenosis of the left main coronary artery. This was treated successfully with coronary angioplasty. In patients with recurrent angina early after bypass surgery in whom angioplasty preceded surgery, acceleration of left main disease should be considered. © 1993 Wiley‐Liss, Inc.
Collateralized chronic total occlusion: A different animal
Authors: Agarwal Subodh K. , Macander Peter J. , Roubin Gary S. 
Published: March 2007

AbstractThis report describes a patient with a chronically occluded proximal LAD in whom antegrade flow was not re‐established by successful dilatation alone. Obliteration of retrograde collateral flow restored antegrade flow. This case demonstrates the potential detrimental effect of vigorous collateral flow on the patency of chronic occlusions after successful PTCA. © 1993 Wiley‐Liss, Inc.
Hemi‐balloon dislodgement during a percutaneous balloon pericardial window procedure: Removal using a second pericardial catheter
Authors: Block Peter C. , Wilson Michael A. 
Published: March 2007

AbstractWe describe retrieval of a balloon fragment from the pericardial space during a percutaneous balloon pericardial window procedure. A second pericardial catheter was placed, and the transfer wire was snared. The second catheter was then used to push the balloon fragment back through the pericardium and out to the skin. © 1993 Wiley‐Liss, Inc.
Pseudodissection of the coronary artery: A variation caused by interventional tools
Authors: Garnic J. Daniel , Lee Don W. , Garza Juan L. 
Published: March 2007

AbstractDuring PTCA immediate decisions often must be made on the basis of a less than optimum data set. We present a combination of factors which produce an incorrect perception of a coronary artery dissection. This potential must be understood by the interventionalist to avoid misdiagnosis and inappropriate therapeutic maneuvers. © 1993 Wiley‐Liss, Inc.
Sources of error in quantitative coronary angiography
Authors: Herrington David M. , Siebes Maria , Walford Gary D. 
Published: March 2007

AbstractMany studies have reported the accuracy of quantitative coronary angiography (QCA) based on experiments using moderated‐size phantoms imaged under unrealistic radiographic conditions. However, these observations may not be generalizable to the setting of clinical angiography. To determine QCA accuracy in a realistic radiographic setting and evaluate the impact of the x‐ray system line spread function, plexiglass phantoms were imaged inside and out of a human thorax. A realistic radiographic background was associated with a 38% increase in variability of results (p< 0.05). Low concentrations of contrast and large image intensifier input screens were associated with significantly larger errors and variability in results (p< 0.05). There was a systematic overestimation of diameter in the smallest phantom. A mathematical model of the x‐ray line spread function was developed that explains the observed overestimation of the smallest phantom and provide a rational approach for correction of the line spread function for QCA. Many factors encountered in clinical coronary angiography such as nonuniform radiographic background, low concentrations of contrast, and small vessel diameters have a significant adverse impact on the accuracy and/or variability of gradient‐based edge detection QCA systems. © 1993 Wiley‐Liss, Inc.
In vitro evaluation of blood flow through autoperfusion balloon catheters
Authors: de Muinck Ebo D. , Angelini Paolo , Dougherty Kathy , Verkerke Bart J. , Rakhorst Gerhard , van Dijk Rene B. , Lie Kong I. 
Published: March 2007

AbstractThe effective flow rates with human blood through an autoperfusion catheter cannot be monitored in vivo and have not been experimentally determined in vitro. The manufacturers (Advanced Cardiovascular Systems [ACS], Temecula, CA) have suggested that “the flow rate” through the Stack over the wire and the RX‐60 monorail catheter is 60 ml/min with a pressure gradient of 80 mmHg. We measured human blood flow rates in vitro through these catheters under different continuous pressure regimens (between 40 and 120 mmHg), with varying hematocrit levels (between 25% and 62%). Measured blood flows at a gradient of 80 mmHg were found to vary from 32 to 65 cc/min, with hematocrit levels of 62‐25%. Minor variations in the circuitry, besides the viscosity of the medium, cause significant changes in observed flow rates (such as kinking of the catheter and blood sedimentation). In vitro determinations of blood flows cannot automatically be transferred to the in vivo condition, primarily because in vitro determinations do not account for the systolic intramural pressure increase (which may overcome the aortic pressure). If such a phenomenon is also considered, then the in vitro flow rates reported here should be multiplied by a factor of 0.40–0.60 to determine effective in vivo flow rates. Such information is relevant for the clinical operator of angioplasty, especially in the treatment of patients at high risk for undergoing percutaneous transluminal coronary angioplasty. © 1993 Wiiey‐Liss, Inc.
Experimental validation of geometric and densitometric coronary measurements on the new generation cardiovascular angiography analysis system (caas ii)
Authors: Haase JÜRgen , Escaned Javier , van Swijndregt Eline Montauban , Ozaki Yukio , Gronenschild Ed , Slager Cornelis J. , Serruys Patrick W. 
Published: March 2007

AbstractComputer‐assisted contour detection and videodensitometric cross sectional area assessment of coronary artery obstructions on the CAAS II system were validated in vitro and in vivo by angiographic cinefilm recording and automated measurement of stenosis phantoms (luminal diameter 0.5, 0.7, 1.0, 1.4, 1.9 mm) which were first inserted in a plexiglass model and then serially implanted in swine coronary arteries. “Obstruction diameter” (OD) and “obstruction area” (OA) values obtained from 10 in vitro and 19 in vivo images at the site of the artificial stenoses were compared with the true phantom dimensions. The in vitro assessment of OD yielded an accuracy of 0.00±0.11 mm (correlation coefficient: r = 0.98, y = 0.18 + 0.82x, standard error of estimate: SEE = 0.08), whereas the in vivo measurement of OD gave an accuracy of −0.01 ± 0.18 mm (r = 0.94, y = 0.22 + 0.82x, SEE = 0.15). The assessment of OA gave an accuracy of −0.08 ± 0.21 mm2in vitro (r = 0.97, y = 0.08 + 0.99x, SEE = 0.22) and −0.22 ± 0.32 mm2in vivo (r = 0.95, y = 0.21 + 1.01x, SEE = 0.33). The mean reproducibility was ±0.09 mm for geometric measurements and ±0.21 mm2for videodensitometric assessments, respectively. Thus, due to inherent limitations of the imaging chain, the reliability of geometric coronary measurements is still far superior to videodensitometric assessments of vessel cross sectional areas. © 1993 Wiiey‐Liss, Inc.
Transluminal extraction atherectomy and adjunctive balloon angioplasty for restenosis after palmaz‐schatz coronary stent implantation
Authors: Ikari Yuji , Yamaguchi Tetsu , Tamura Tsutomu , Isshiki Takaaki , Saeki Fumihiko , Hara Kazuhiro 
Published: March 2007

AbstractTwo patients who developed restenosis after implantation of Palmaz‐Schatz coronary stents were successfully treated by transluminal extraction atherectomy and there has been no recurrence on follow‐up angiograms. The optimum strategy for managing restenosis after coronary stenting remains unclear, but transluminal extraction atherectomy appears to be a safe and effective option. © 1993 Wiiey‐Liss, Inc.
Giant left main pseudoaneurysm obstructing the left anterior descending coronary artery demonstrated by transesophageal echocardiography and coronary angiography
Authors: Shalev Yoseph , Vidne Bernard , Snir Etan , Kracoff Oscar H. , Oetinger Michael , Caspi Abraham 
Published: March 2007

AbstractLeft main pseudoaneurysm is a rare angiographic finding in young adults. We describe a 23‐year‐old male who presented with an acute anterior wall myocardial infarction. Coronary angiography and transesophageal echocardiography reveal a huge aneurysm of the distal left main obstructing the left anterior descending artery (LAD), which was defined by history as a pseudoaneurysm. The pseudoaneurysm was successfully resected and mammary artery was used to repair the distal left main and to bypass the LAD. © 1993 Wiiey‐Liss, Inc.
Glidewire treatment of resistant coronary occlusions
Authors: Freed Mark , Boatman James E. , Siegel Noah , Safian Robert D. , Grines Cindy L. , O'Neill William W. 
Published: March 2007

AbstractInability to cross the site of occlusion with a guidewire is the most common cause of failed angioplasty. The Glidewire, a kink‐resistant, flexible wire with a hydrophilic coating, was applied to 71 (59 total, 12 subtotal) refractory occlusions, resulting in an overall angioplasty success rate of 45%. The Giidewire may improve the success rate for PTCA of total and subtotal occlusions that cannot be crossed with conventional guidewires.© 1992 Wlley‐Liss, Inc
Total aortic occlusion caused by sustained balloon inflation: a previously unreported complication of intraaortic balloon counterpulsation
Authors: Ferrell Margaret A. , Doherty Martin , Zusman Randall M. , Nash Ira S. 
Published: March 2007

AbstractA case of acute lower‐body ischemia 2 days following intraaortic balloon pump insertion is reported. Fluoroscopy revealed persistent balloon inflation throughout the cardiac cycle with distal aortic occlusion. Attempts to manually deflate the balloon were unsuccessful until a guidewire was advanced through the gas‐exchange lumen into the body of the balloon. The balloon catheter was removed without clinical sequelae other than transient oliguria and an asymptomatic increase in creatinine phosphokinase (CPK). This is a previously unreported complication of intraaortic balloon counterpulsation.© 1993 Wlley‐Liss, Inc
Retrieval of undeployed stents from the right coronary artery: report of two cases
Authors: Veldhuijzen Frank L. M. J. , Bonnier Hans J. R. M. , Michels H. Rolf , El Gamal Mamdouh I. H. , van Gelder Berry M. 
Published: March 2007

AbstractTwo patients are described in whom an undeployed stent (1 Wiktor and 1 Palmaz‐Schatz) was retained in the proximal segment of the right coronary artery during coronary angioplasty. In both cases the stent was caught by a technique using a second guidewire. The stent was removed in the first patient during bypass surgery; in the second patient it was removed from the femoral sheath© 1993 Wlley‐Liss, Inc
Adaptor device for shortening guide catheters to access distal lesions in coronary angioplasty
Authors: Chan Rodrigo C. , Rihal Charanjit S. , Menke Kristina K. , Winter Steven J. , Holmes David R. 
Published: March 2007

AbstractOne of the challenges in interventional cardiology is accessing distal stenoses in both native coronary arteries and bypass grafts. This article reports the fabrication and use of an adaptor device that can be connected to the proximal segment of a shortened guide catheter for easier and safer access to these distal lesions.
© 1993 Wlley‐Liss, Inc
Guidelines for personnel radiation monitoring in the cardiac catheterization laboratory
Authors: Balter Stephen 
Published: March 2007

AbstractThe Laboratory Performance Standards Committee of the Society for Cardiac Angiography and Interventions has devised guidelines to inform catheterization laboratory personnel about appropriate radiation monitoring and protection.A personal monitoring dosimeter must be placed over any radiation protective garments on the collar near the thyroid.A second dosimeter, worn at the waist level under any radiation protective garments, is mandatory for any declared pregnant workers exposed to radiation. This dosimeter is recommended, but not required, for all personnel in the catheterization laboratory.The limit for whole body radiation exposure is stated in terms of the effective dose equivalent (EDE). Different formulas are used for calculating the EDE, depending on the number of dosimeters worn simultaneously by the individual.Finger dosimeters should be worn by personnel whose hands are likely to be directly exposed to the x‐ray beam.Initial and periodic training in radiation protection is a part of good laboratory practice.
© 1993 Wlley‐Liss, Inc
Multiple spontaneous coronary artery dissections in a middle aged woman: support for an underlying eosinophilic arteritis predisposing to intimal disruption
Authors: Burkey David , Love John , Fanning Joseph , Lambrew Costas 
Published: March 2007

AbstractA 43‐year‐old female received tissue plasminogen activator for an acute antero‐apical myocardial infarction. Cardiac catheterization demonstrated three focal dissections involving the left anterior descending and circumflex arteries. She expired unexpectantly after undergoing emergency coronary artery bypass grafting for therapy of an extension of her infarct. To our knowledge, this is the fourth report of multiple spontaneous coronary artery dissections and the second in which tissue plasminogen activator was administered. The histiologic findings and their implications are reviewed.
© 1993 Wlley‐Liss, Inc
Improved anticoagulation management after palmaz schatz coronary stent implantation by sealing the arterial puncture site with a vascular hemostasis device
Authors: Kiemeneij Ferdinand , Jan Laarman Gert 
Published: March 2007

AbstractSealing the arterial puncture site with a vascular hemostasis device has the potential to maintain optimal anticoagulation after stent implantation. The level of heparinization during the first 3 days after successful stent implantation was retrospectively compared between 2 groups of medically treated patients with (group A; n = 18) and without (group B; n = 17) a Vasoseal™ after sheath removal. The number of APTTs sampled in group A and B was 233 and 168, respectively. Respective mean values of APTT (seconds) in group A and B were 180 ± 79 and 172 ± 91 at day 1 (p = NS), 132 ± 43 and 125 ± 61 at day 2 (p = NS) and 123 ± 36 and 116 ± 48 at day 3 (p = NS). More APTTs were suboptimal (< 80 secs) in group B (34/168; 20%) compared to group A (17/233; 7%) [p < 0.001]. More patients in group B compared to group A had 1 or more (14/17; 82% vs. 8/18; 44%; p = 0.04), 2 or more (10/17; 59% versus 3/18; 17%; p = 0.02) and 3 or more (8/17; 47% vs. 2/18; 11%; p = 0.03) suboptimal APTTs. Bleeding complications were seen in 4 patients without and in 3 patients with a Vasoseal™. Thus application of a vascular hemostasis device results in a less variable anticoagulation after coronary stenting, but it does not abolish entry site‐related bleeding complications.© 1993 Wlley‐Liss, Inc
Miniature angled sub‐selective guiding catheter aids in placing guidewire through difficult anatomy
Authors: Gibson Paul H. 
Published: March 2007

AbstractA method for fabricating and using a “mini” guiding catheter is presented. Use of the mini guiding catheter provides the back up support necessary to enable a guidewire to traverse difficult anatomy. Use of this device to cross a lesion in an acutely angulated circumflex artery is presented.© 1993 Wlley‐Liss, Inc
Balloon angioplasty of a tissue conduit stenosis after surgical repair of anomalous left coronary artery
Authors: Carey Daniel , Vincent Robert N. , Brames Gregory P. , Williams Willis H. , Douglas John S. 
Published: March 2007

AbstractSurgical correction of anomalous coronary arteries may result in late conduit or anastamotic stenosis. In this case report, we describe the use of coronary angioplasty to dilate a stenosis at the aortic ostium of an intrapulmonary tunnel created to correct an anomalous left coronary artery from the pulmonary artery.
© 1993 Wlley‐Liss, Inc
Urgent/Emergent percutaneous transvenous mitral commissurotomy
Authors: Wu Jong‐Jen , Chern Ming‐Shyan , Yeh Kou‐Ho , Chen Yu‐Ching , Fu Morgan , Hung Jui‐Sung 
Published: March 2007

AbstractUrgent/emergent percutaneous transvenous mitral commissurotomy (PTMC) was performed in 10 patients (two men and eight women, aged 21 to 60 yr). All patients had arterial hypoxemia and four required mechanical respirators. PTMC was performed in the semi‐recumbent position in four patients. The seven patients with pliable valves (group 1) achieved good hemodynamic and echocardiographic results after PTMC, but one died 2 wk later because of sepsis complicating preexisting pneumonitis. The two pregnant patients uneventfully delivered normal babies at term. There was continued clinical improvement in the six surviving patients at last follow‐up at 11 to 39 mon (median 26). Of the three patients with calcified valves and severe subvalvular lesions (group 2), the premoribund patient in whom last‐resort PTMC created severe mitral regurgitation died 3 days later of multiple organ failure. The other two patients underwent mitral valve replacement 1–6 days later because of lack of clinical improvement due to creation of severe mitral regurgitation and ineffective mitral valve dilation, respectively. In conclusion, urgent/emergent PTMC is feasible and safe. However, its outcomes are dictated by the status of diseased mitral valve and coexisting illness.
Anomalous origin of the left main coronary artery from the right coronary artery ostium‐interarterial subtype: Angiographic definition and surgical treatment
Authors: Selig Michael B. , Jafari Nercy 
Published: March 2007

AbstractCoronary artery anomalies occur infrequently compared to atherosclerotic disease; however, when they do occur, they can pose difficulty with coronary visualization and identification. Ectopic origin of the left mainstem coronary artery from the right sinus of Valsalva coursing between the great vessels is the rarest subtype of these anomalies, can be potentially serious, and presents unique problems for surgical treatment.