bluuebunny/crossref_metadata_2025_split huggingface dataset:
Bail‐Out coronary stenting in an extremely tortuous right coronary artery with the palmaz‐schatz stent and teleguide sheath
Authors: Foran J. P. M. , Nordrehaug J. E. , Xynopoulos G. , Wainwright R. J. 
Published: March 2007

AbstractSignificant vessel tortuosity is a relative contraindication to the use of the Palmaz‐Schatz coronary stent for fear of stent displacement during delivery. We describe a patient with unstable angina in whom conventional coronary angioplasty in an extremely tortuous right coronary artery resulted in an occlusive dissection. Emergency bypass surgery was avoided by the successful placement of a protected Palmaz‐Schatz stent using a 5F Teleguide sheath. © 1993 Wiiey‐Liss, Inc.
Treatment of simple and complex coronary stenosis using rotational ablation followed by low pressure balloon angioplasty
Authors: Borrione Massimo , Hall Patrick , Almagor Yaron , Maiello Luigi , Khlat Boutros , Finci Leo , Colombo Antonio 
Published: March 2007

AbstractHigh speed coronary rotational ablation followed by adjunctive low pressure coronary balloon angioplasty was used in 166 patients. Complex lesions were present in 63% of patients. Clinical success was achieved in 157 patients (95%). Angiographic success rate was 10% in A lesions, 95% in B1 lesions, 98% in B2 lesions, and 93% in C lesions. Mean vessel lumen diameter has increased from 0.4 mm to 1.4 mm after rotational ablation and to 2.3 mm following adjunctive balloon angioplasty. Left ventricular dysfunction, the presence of total occlusion, and the severity of stenosis before theprocedure were predictive of clinical failure. There were three abrupt vessel closures (1.8%) with one Q wave myocardial infarction. Non‐Q wave myocardial infarction occurred in 14 patients (8.4%) and three patients died during hospitalisation (1.8%). We conclude that rotational atherectomy followed by adjunctive low pressure balloon angioplasty gives comparable high success rates in different coronary lesions. © 1993 Wiiey‐Liss, Inc.
Prolonged heparin therapy for occlusive intracoronary thrombus
Authors: Kolansky Daniel M. , Shapiro Timothy A. , Laskey Warren K. 
Published: March 2007

AbstractThe presence of intracoronary thrombus is associated with increased complications during coronary angioplasty. Such thrombus may also mimic the appearance of a critical stenosis. We report a case of nearly occlusive intracoronary thrombus which resolved after prolonged heparin therapy, revealing only a minimal underlying stenosis. The recognition and treatment of this entity is discussed. © 1993 Wiiey‐Liss, Inc.
Use of the stiff shaft, straight terumo glidewire in crossing stenotic aortic valves
Authors: Sharma Samin K. , Israel Douglas H. , Kumar Kul , Ambrose John A. 
Published: March 2007

AbstractOne of the more difficult and time‐consuming diagnostic procedures in the cardiac catheterization laboratory is retrograde crossing of the severely stenotic aortic valve. Whereas patients with advanced aortic stenosis tend to be complicated and elderly, lengthy procedures can lead to a higher incidence of thrombo‐embolic and vascular complications and relatively greater procedural blood loss. This report concerns the use of the Terumo Glidewire to facilitate passage through stenotic and tortuous peripheral arteries. © 1993 Wiiey‐Liss, Inc.
Percutaneous transradial artery approach for coronary stent implantation
Authors: Kiemeneij Ferdinand , Jan Laarman Gert 
Published: March 2007

AbstractA new approach for implantation of Palmaz Schatz coronary stents is reported. We describe the technique and rationale of coronary stenting with miniaturized angioplasty equipment via the radial artery.This technique is illustrated in three patients. One patient underwent Palmaz Schatz stent implantation for a saphenous vene coronary bypass graft stenosis, the second patient for a restenosis in the anterior descending coronary artery after atherectomy, and the third patient for a second restenosis after balloon angioplasty in the circumflex coronary artery. © 1993 Wiley‐Liss, Inc.
Acute occlusion of a remote coronary artery complicating directional coronary atherectomy
Authors: Blankenship James C. 
Published: March 2007

AbstractTwo cases of acute occlusion in a remote coronary artery complicating directional coronary atherectomy are reported. In neither case was there definite angiographic evidence of spasm, dissection, or embolization. Since this complication is seldom seen with coronary angioplasty, it may represent a relatively specific risk of directional atherectomy.© 1993 Wlley‐LIM, Inc
Contralateral femoral vein removal of a circumferentially ruptured balloon‐catheter following pulmonary artery angioplasty
Authors: Luk Gordon , Rothman Abraham 
Published: March 2007

AbstractWhile attempting to remove a circumferentially ruptured balloon following branch pulmonary artery angioplasty, the shaft of the catheter broke, leaving the distal portion of the balloon and catheter in the femoral vein but still on the exchange wire. We describe a method to retrieve the broken balloon catheter via the contralateral femoral vein.© 1993 Wlley‐Liss, Inc
Balloon angioplasty of totally and subtotally occluded coronary arteries: results using the hydrophillic terumo radifocus guidewire m (glidewire)
Authors: Gray D. F. , Sivananthan U. M. , Verma S. P. , Michalis L. K. , Rees M. R. 
Published: March 2007

AbstractBalloon angioplasty was attempted, using hydrophillic Terumo guidewires, in 52 totally and subtotally occluded coronary arteries (50 patients), in which recanalisation by conventional angioplasty guidewires had failed. Hydrophillic guidewires had a crossing success rate of 65.4% (34/52); there was subsequently a technical success rate of 56% (29/52) and clinical success of 39% (20/52). Dissection of the coronary artery was seen in 16/29 technically successful cases. In 12/16 arteries, dissection was small and localised, whereas in 4/16 large and extended distally. There was one myocardial infarction and no peri‐procedural deaths. Eleven out of 29 technically successful cases continued to be regarded as successful 12 no postangioplasty. We conclude that the hydrophillic Terumo guidewire can improve the success rate in angioplasty of totally and subtotally occluded coronary arteries when conventional wires have failed.
© 1993 Wlley‐Liss, Inc
“Pseudo‐Narrowing” during right coronary angioplasty: How to diagnose correctly without withdrawing the guidewire
Authors: Chalet Yann , Chevalier Bernard , Hadad Simon El , Guyon Philippe , Lancelin Bernard 
Published: March 2007

AbstractThe straightening of a sinuous proximal segment of a coronary artery using the stiffness of the guidewire has recently been recognized as likely to cause false coronary lesions. The accurate diagnosis between a true dissection and a pseudo‐lesion is usually only done once all intra‐coronary material has been removed into the guiding catheter. Such a manoeuvre may prove dangerous in case of dissection. We propose to demonstrate that it is possible to diagnose this phenomenon while leaving the guidewire within the coronary artery, and withdrawing it progressively until its floppy segment rests equally on either side of the suspect lesion.
Immediate arterial hemostasis after cardiac catheterization: Initial experience with a new puncture closure device
Authors: Aker Umit T. , Kensey Kenneth R. , Heuser Richard R. , Sandza Joseph G. , Kussmaul William G. 
Published: March 2007

AbstractA novel device for obtaining arterial hemostasis after invasive procedures was tested in 30 patients undergoing diagnostic catheterization (26 patients) or coronary angioplasty (4 patients). The device is deployed through an arterial sheath and forms a positive mechanical seal both inside and outside the defect in the arterial wall. The components are all bioabsorbable.Thirteen patients received a heparin bolus during the catheterization procedure. The activated clotting time recorded in 15 patients just prior to device deployment averaged 264 sec. 29 of 32 attempted device deployments were successful (91%); and the remaining 3 devices pulled completely out as called for by design in the event of incomplete deployment. Twenty‐nine patients ultimately achieved successful hemostasis using the device, with the other patient receiving manual hemostasis. Of these 29, hemostasis was immediate and complete in 19 patients. Light digital pressure was required in another 8 patients for less than 5 min. There was minor delayed bleeding requiring supplemental light pressure in several cases. A total of 11 patients required supplemental pressure in addition to the hemostasis device. The use of bolus heparin was significantly (P = 0.05, Fisher's exact test) related to the requirement for supplemental pressure.Three patients developed hematomas, one of which was present prior to device deployment. The other two patients had received bolus heparin. No patient required transfusion or surgical repair. There was no change in the ankle/brachial systolic blood pressure index after device deployment or at late (30–60 day) follow‐up.Ultrasound studies revealed no significant pathology relative to the device. There was no residual evidence of the device at 2 month follow‐up ultrasound study.Thus the Kensey Nash Hemostatic Puncture Closure Device can safely, reliably, and rapidly provide arterial hemostasis after cardiac catheterization procedures. Its use warrants further study in comparison to standard manual hemostasis.
Stent shortening and elongation: Pitfalls with the wiktor coronary endoprosthesis
Authors: Vogt Pierre , Eeckhout Eric , Stauffer Jean‐Christophe , Goy Jean‐Jacques , Kappenberger Lukas 
Published: March 2007

AbstractThis report demonstrates two specific complications that occurred during implantation of a Wiktor (Medtronic, Inc., Minneapolis, MN) coronary stent: stent shortening and elongation were observed and attributed to the unique coil structure of the device. Major cardiac events occurred during follow‐up as a consequence of this stent deformation. Therefore, semiurgent bypass surgery should be considered to treat this complication.
Cardiac stab wound resulting in a left anterior descending artery to left ventricular fistula with delayed pericardial tamponade
Authors: Rossum Alfred , Osborn Larry , Wernly Jorge , Timm Craig , Abrams Jonathan 
Published: March 2007

AbstractWe describe the third known case of a traumatic left anterior descending artery to left ventricular fistula. Emergency operative repair was required on day 7 for delayed pericardial tamponade. The significant incidence of late serious sequelae with traumatic coronary artery fistulas suggests that early surgery is warranted.
Angioscopic guided interventions in a saphenous vein bypass graft
Authors: Annex Brian H. , Ajluni Steven C. , Larkin Timothy J. , O'Neill William W. , Safian Robert D. 
Published: March 2007

AbstractIntracoronary stents appear promising for treatment of focal vein graft lesions, but their use may be limited by the presence of intraluminal thrombus. This report describes the use of percutaneous coronary angioscopy to identify the presence or absence of intraluminal thrombus and to guide interventional therapy with transluminal extraction coronary atherectomy (TEC) and stenting in a patient with a complex vein graft stenosis.
Assessment of spontaneous coronary artery dissection by intravascular ultrasound in a patient with unstable angina
Authors: Kearney Peter , Erbel Raimund , Ge Junbo , Zamorano Jose , Koch Lothar , Görge Gunter , Meyer Jurgen 
Published: March 2007

AbstractWe describe a case of spontaneous coronary artery dissection that gave rise to post infarction unstable angina. An ambiguous angiographic appearance was shown by intracoronary ultrasound to arise from an extensive coronary dissection. The dissection membrane separating true and false lumina and features to suggest sluggish flow and early thrombosis in the false lumen were observed. No increase in lumen calibre was evident on ultrasound after PTCA (probably a consequence of the relatively large ultrasound catheter blank), but coronary flow reserve measured with intracoronary Doppler did improve and the patient remained stable and free of angina following the procedure.
Doppler catheter tip localization using color enhancement
Authors: Frazin Lee J. , Vonesh Michael J. , Yaacoub Adel S. , Kane Bonnie J. , Greene Rodney , Kemper W. Scott , Guberek Michael , McPherson David D. 
Published: March 2007

AbstractThe objective of this research was to determine if the ultrasound emissions of the Doppler catheter can be used to locate its position in 3 dimensions by conventional echocardiography. A Doppler catheter has previously been shown to permit nonfluoroscopic retrograde catheterization of the aortic root and left ventricular chamber by using velocity waveform polarity for directional guidance. A significant difficulty in providing ultrasound catheter guidance, however, has been the inability to recognize the Doppler catheter tip, because each point at which a flexible catheter crosses the image plane can be misinterpreted as the catheter tip. Initial in vitro water bath trials were performed using the Doppler catheter attached to a standard velocimeter. Using a 5 MHz imaging transducer and color Doppler methods, the presence or absence of a banded color pattern which could demarcate the Doppler catheter tip was recorded at various angles in and out of the scanning plane. Using Doppler retrograde guidance and transesophageal echocardiography, color Doppler banded patterns, which could identify the Doppler catheter tip, were investigated in the dog aorta. In order to understand the physical mechanisms involved, a series of water bath trials were then conducted using the Doppler catheter attached to a velocimeter which was synchronized to the echo machine. Initial nonsynchronized water bath trials revealed distinct banded color patterns demarcating the Doppler catheter tip when it pointed in any direction within the beam width, except for a 40° blind cone directly away from the imaging transducer. In vivo trials resulted in tracking of the Doppler catheter in the aorta and placement in the aortic root. The synchronized water bath trial revealed that the banded color pattern was a result of periodic direct sound transmission from the Doppler catheter to the imaging transducer. These studies have demonstrated that the ultrasonic emissions from the Doppler catheter allow its localization in three dimensions, and these properties may be useful in invasive ultrasonic diagnostic and therapeutic technology. © 1994 Wiley‐Liss,Inc..
Quantitation of the effective right ventricular output in patients with pulmonary atresia and intact ventricular septum after placement of a right ventricular outflow patch and an aorticopulmonary shunt
Authors: Saba Ziad , Armstrong Brenda E. , O'Laughlin Martin P. 
Published: March 2007

AbstractA mathematical derivation is presented of an equation that allows quantitation, in the cardiac catheterization laboratory, of the effective output of the right ventricle (QRV) in patients with pulmonary atresia and intact ventricular septum (PA/IVS) after palliation with a right ventricular outflow patch and an aorticopulmonary shunt. This derivation is based on the Fick principle and accounts for that portion of the right‐to‐left atrial shunt that flows through the aorticopulmonary shunt to the lungs and thus contributes to the effective pulmonary blood flow (Qep). This equation relates QRV to pulmonary blood flow (Qp), systemic cardiac output (Qs), and Qep by QRV = Qp + Qs ‐ (Qp)(Qs)/Qep. By providing an assessment of right ventricular function, this equation may be helpful in determining the suitability of the right ventricle to support biventricular repair. © 1994 Wiley‐Liss,Inc..
Transverse coronary dissection resulting in abrupt vessel closure following directional coronary atherectomy: clinical, angiographic, and intracoronary ultrasound findings
Authors: Shurmur Scott W. , Deligonul Ubeydullah , Rayner Ralph W. , Sears Thomas W. , Porter Thomas R. 
Published: March 2007

AbstractA 60‐year‐old man underwent directional coronary atherectomy (DCA) of the mid portion of a large, anatomically dominant left circumflex coronary artery, resulting in propagating transverse dissection and subsequent complete distal occlusion. Intravascular ultrasound imaging (IVUS) of the dissected segment demonstrated the entry point of the dissection, and systolic compression of the true vessel lumen, prior to angiographic deterioration of distal coronary flow. © 1994 Wiley‐Liss,Inc..
Longitudinal force focused coronary angioplasty: a technique for resistant lesions
Authors: Stillabower Michael E. 
Published: March 2007

AbstractIn a small percentage of vascular lesions undergoing angioplasty, the force generated by balloon inflation is insufficient to produce an acceptable deformation of the stenosis. Techniques developed to deal with this problem include the use of laser energy and rotational atherectomy. Use of a guidewire positioned between the dilating balloon and vessel wall has been reported to be effective in resistant heavily calcified lesions. The current case report describes a situation in which two wires between the balloon and the target lesion were required to produce an acceptable reduction in stenosis severity. This technique represents an extension of the single‐wire technique and may have relevance to the strategy being explored with the “cutting balloon”. © 1994 Wiley‐Liss,Inc..
Intravascular ultrasound imaging after excimer laser angioplasty
Authors: Honye Junko , Mahon Donald J. , Nakamura Shigeru , Wallis James , Al‐Zarka Amer , Saito Satoshi , Berns Michael , Tobis Jonathan M. 
Published: March 2007

AbstractTo help elucidate the mechanism of excimer laser coronary angioplasty (ELCA), intra‐vascular ultrasound (IVUS) imaging was performed in 19 of 29 patients who were treated with ELCA. The results were compared with a non‐randomized control group of 18 patients who had IVUS studies both before and after PTCA alone. After ELCA alone, lumen diameter (1.9 × 1.7 mm) and lumen cross‐sectional area (CSA) (2.9 mm2) by IVUS were not significantly different from baseline values in the patients before PTCA alone (2.1 × 1.8 mm, 3.2 mm2). After balloon dilatation in the laser treated group, lumen diameter (2.5 × 2.1 mm) and lumen CSA (4.9 mm2) were significantly greater than those post ELCA alone. However, there was no difference in lumen CSA or atheroma CSA in the group treated with excimer laser plus balloon dilatation vs. these measurements in the group treated with PTCA alone.ELCA does not ablate a large amount of atheroma (9% reduction) but creates a pathway to permit easier passage of a PTCA balloon. These quantitative and morphologic results may help explain why the restenosis rate with ELCA is similar to PTCA alone. © 1994 Wiley‐Liss,Inc..
Cardiac catheterization and selective coronary angiography in ascending aortic aneurysm or dissection
Authors: Israel Douglas H. , Sharma Samin K. , Ambrose John A. , Ergin M. Arisan , Griepp Randall R. 
Published: March 2007

AbstractCardiac catheterization and coronary angiography can be technically demanding and is potentially risky in patients with ascending aortic aneurysm or dissection. We describe our approach to and results in catheterizing 63 patients with ascending aortic pathology. © 1994 Wiley‐Liss,Inc..
Adult respiratory distress syndrome complicating intravenous infusion of low‐molecular weight dextran
Authors: Taylor Marc A. , Diblasi Stephen L. , Bender Robert M. , Santoian Edward C. , Cha Se Do , Dennis Charles A. 
Published: March 2007

AbstractRespiratory failure is one of the most uncommon and serious adverse drug reactions. Low‐molecular‐weight‐dextran (Dextran‐40) is a useful adjunctive anti‐platelet agent in the setting of coronary angioplasty and intracoronary stent placement. We report the occurrence of the adult respiratory distress syndrome following intravenous infusion of Dextran‐40. © 1994 Wiley‐Liss,Inc..
A technique for changing a ptca balloon catheter over a regular‐length guidewire
Authors: Nanto Shinsuke , Ohara Tomoki , Shimonagata Tsuyoshi , Hori Masatsugu , Kubori Syujiro 
Published: March 2007

AbstractIn 100 patients who underwent coronary angioplasty with more than one balloon catheter for a lesion, these over‐the‐wire balloon catheters were changed by using a regular‐length guidewire. In order to change to another balloon, the inflation device was connected to the central guide wire lumen of the catheter after pulling back the catheter until the proximal end of the regular length guide wire disappeared. By pulling back the balloon catheter from the guiding catheter by applying a pressure with the inflation device, the balloon was taken out of the guiding catheter leaving the wire in the coronary artery. One hundred forty‐nine of 163 attempted procedures were completed successfully. Our technique helped in performing a fast, safe, and reliable changing procedure compared to the procedure with an extended guidewire. © 1994 Wiley‐Liss,Inc..
Ancrod infusion for anticoagulation during and after ptca in a patient with heparin‐induced thrombocytopenia
Authors: Moore Joseph A. , Burket Mark W. , Puri Sanjeev , Temesy‐Armos Peter , Lachant Neil , Skeel Roland 
Published: March 2007

AbstractAncrod is a rapid‐acting defibrinogenating agent derived from the venom of the Malayan pit viper which has been used successfully as an alternative to heparin sulfate for anticoagulation during peripheral vascular procedures and coronary artery bypass surgery. We describe the first use of ancrod for anticoagulation before and during percutaneous transluminal coronary angioplasty (PTCA) in a patient with heparin‐associated thrombocytopenia. © 1994 Wiley‐Liss,Inc..
Relation between changes in severity of coronary artery stenosis and anginal patterns
Authors: Karnegis James N. , Matts John P. , Tuna Naip , Amplatz Kurt 
Published: March 2007

AbstractAlthough myocardial ischemia causes angina pectoris, angina and the severity of coronary artery stenosis in individuals do not correlate. However, changes in anginal status over time correlated with changes in the severity of coronary artery stenosis as determined by repeated coronary arteriograms has not been previously studied. Coronary arteriograms, done both at entry into the Program on the Surgical Control of the Hyperlipidemias (POSCH) and 3 years later, were blindly graded for changes in overall severity of coronary artery stenosis according to protocol by the POSCH Arteriography Review Committee. Arteriographic and clinical data from 376 control subjects (347 men, 29 women) were analyzed. There was no statistically significant relation over a long‐term (3 year) period between the absence, presence, development, or disappearance of angina pectoris and changes in coronary artery stenosis severity as determined by coronary arteriography. © 1994 Wiley‐Liss,Inc