bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparison of gated cardiac magnetic resonance imaging and two‐dimensional echocardiography for the evaluation of right ventricular thrombi: A case report with autopsy correlation
Authors: Johnson Dennis E. , Vacek James , Gollub Steven B. , Wilson David B. , Dunn Marvin 
Published: March 2007

AbstractIn a patient who died of complications of severe pulmonary hypertension, right ventricular failure, and sepsis, antemortem two‐dimensional (2‐D) echocardiography and magnetic resonance imaging (MRI) studies demonstrated a right ventricular mass which at autopsy proved to be thrombus. The diagnostic features of this mass as imaged by these two methods are compared. This case was complicated in that the patient had a history of right atrial myxoma that had been successfully removed three years previously, and a history of several prior pulmonary emboli. Gated MRI depicted the size, shape, and surface characteristics of the mass more clearly than 2‐D echocardiography because MRI provided better contrast and spatial resolution. Both techniques were useful in localizing the mass and showing if it was fixed or mobile. Depiction of tumor attachment was unclear with echocardiography but very clear with MRI. MRI also showed a left pulmonary artery thrombus that was not visualized by 2‐D echocardiography. Both techniques provided chamber dimension measurements showing enlargement of the right atrium and ventricle. This case demonstrates that gated MRI provides high‐quality images of cardiac anatomy and masses. Gated cardiac MRI should be considered at least complementary and potentially superior to two‐dimensional echocardiography in the evaluation of intracardiac masses in certain patients.
Differential hemodynamic effects of hypaque‐76 and renografin‐76 during coronary angiography: The role of calcium‐binding additives
Authors: Hwang Ming H. , Murdock David K. , En Piao Zhen , Gries William J. , Scanlon Patrick J. 
Published: March 2007

AbstractHypaque‐76 (H76) and Renografin‐76 (R76) are nearly identical ionic contrast media, except that R76 binds more calcium than H76 because of the presence of sodium citrate and EDTA in R76. To determine whether the calcium‐binding additives in ionic contrast media contribute to the hemodynamic effects of contrast media during coronary angiography, left coronary angiography was performed in anesthetized dogs. In nine closedchest dogs, 10 cc of H76 and R76 were injected in each dog in a blinded, randomized fashion. The effect of H76 and R76 on left ventricular systolic pressure (LVSP) and left ventricular diastolic pressure (LVDP), on mean aortic pressure (MAP), and on left ventricular (LV) dp/dt was recorded. Compared with H76, R76 produced a greater decrease in the LVSP (77 ± 25 mmHg vs 48 ± 17 mmHg P < .05), MAP (72 ± 24 mmHg vs 38 ± 18 mmHg P> .01). and LV dp/dt (747 ± 87 mmHg/sec vs 460 ± 81 mmHg/sec P> .01). In nine additional open‐chest dogs, left coronary angiography was performed 1 hour after occlusion of the proximal LAD coronary artery. Seven cc R76 produced a 35 ± 15 mmHg decrease in LVSP, compared with 20 ± 9 mmHg with H76 (P> .01). The LV dp/dt decreased 720 ± 387 mmHg/sec with R76, compared with 462 ± 222 mmHg/sec with H76 (P> 0.05). Thus, R76 produces significantly greater hemodynamic abnormalities than H76. Contrast media lacking calcium‐binding agents may be preferable for coronary angiography.
Cortical blindness after left internal mammary artery to left anterior descending coronary artery graft angiograph
Authors: Henzlova M.J. , Coghlan H.C. , Dean L.S. , Taylor J.L. 
Published: March 2007

AbstractWe describe a case of transient cortical blindness following internal mammary artery to left anterior descending coronary artery graft angiography. This dramatic, infrequent, and self‐limiting complication so far has not been described in the cardiovascular literatureIn the present era of internal mammary artery use for the left coronary artery grafting, the angiographer should be familiar with the diagnosis, prevention, and management of complications previously seen mostly during the posterior cerebral circulation angiography.
Percutaneous double‐balloon angioplasty of a stenotic modified fontan aortic homograft conduit
Authors: Pelikan Peter , French William J. , Ruiz Carlos , Laks Hillel , Criley John Michael 
Published: March 2007

AbstractA 28‐year‐old woman with pulmonary atresia underwent a modified Fontan procedure that utilized a valved aortic homograft; she developed stenosis of the distal anastomosis between the homograft and the pulmonary artery. Because of the increased risk of reoperation, balloon angioplasty of this stenotic lesion was performed successfully. In the subsequent 11 months she has remained asymptomatic. Balloon angioplasty was a successful alternative to reoperation in this patient.
An unusual case of guide wire fracture during percutaneous transluminal coronary angioplasty
Authors: Md Matty Vrolix , Md Johan Vanhaecke , Md Jan Piessens , Md Hilaire De Geest 
Published: March 2007

AbstractWe report a case of guide wire fracture during percutaneous transluminal coronary angioplasty, using one of the newer catheter systems. The broken free end of the guide wire remained within the coronary tree, and surgical removal was necessary. Entrapment and overcoiling of the guide wire can cause fracture; in our case excessive bending in a tortuous coronary tree resulted in this unusual complication. An excessive tensile load to the guide wire may result from anatomical peculiarities and can cause wire fracture.
Percutaneous balloon mitral valvuloplasty in a pregnant woman with mitral stenosis
Authors: Safian Robert D. , Berman Aaron D. , Md Benjamin Sachs , Diver Daniel J. , Come Patricia C. , Baim Donald S. , Bsn Linda McKay , Md William Grossman , McKay Raymond G. 
Published: March 2007

AbstractA 39‐year‐old woman with symptomatic mitral stenosis underwent percutaneous mitral valvuloplasty at the end of her first trimester of pregnancy. Balloon dilatation utilizing a double 18–20 mm balloon technique resulted in improvement in mean mitral gradient (16 to 7 mmHg) and in calculated mitral valve area (1.4 to 2.4 cm2), without significant complications and with an estimated radiation exposure to the fetus of less than 0.2 rads. The procedure resulted in disappearance of symptoms of congestive heart failure and allowed for discontinuation of diuretics. The subsequent course of gestation was uncomplicated and a normal baby boy was delivered in the 36th wk. We conclude that percutaneous mitral valvuloplasty may produce successful palliation of symptoms in patients with mitral stenosis during pregnancy.
Development and application of transseptal left heart catheterization
Authors: Weiner Ronald I. , Md Vladir Maranhao 
Published: March 2007

AbstractThe recent interest in transseptal left heart catheterization affords an opportunity to review the development and application of this procedure. This review briefly follows the history of right and left heart catheterization to the development of the transseptal procedure. A detailed description of the technique of transseptal catheterization is provided, as well as the indications and contraindications to its use. A learning curve is associated with this technique and is inversely related to the complication rate of the transseptal approach. Physicians working in high volume catheterization laboratories may gain the experience to safely perform transseptal left heart catheterization on carefully selected patients.
Preservation of left ventricular function in patients with total occlusion of the left anterior descending coronary artery and wide‐caliber distal vessel filling by collateral vasculature
Authors: Sedlis Steven P. , Cohen Kenneth H. , Sequeira Jeffrey M. , El‐Sherif Nabil 
Published: March 2007

AbstractThe segmental ventricular function of 76 patients with total occlusion of the left anterior descending coronary artery (LAD) was analyzed to establish the relationship between ventricular function and the presence and angiographic appearance of the collateral circulation. The relationship between function and collateral supply was found to be significant (P < .01). The only angiographic feature of the collateral vasculature that was associated with preserved function was the caliber of the distal LAD. Wide‐caliber vessels were more likely to be associated with preserved ventricular function than thin vessels (P < .01). In contrast, both rapidly filling collateral arteries and slow filling vessels were associated with preserved ventricular function. Collateral supply maintenance was significantly associated with preserved ventricular function, even when the collaterals arose from stenotic coronary arteries. Furthermore, despite marked differences in ventricular function between the base and apex of the heart, there was a true relationship between preserved ventricular function and the presence of collateral vessels for all segments of the anterior wall. These findings may be relevant to clinical decision making and to proper interpretation of studies of ventricular function following LAD occlusion.
Use of mechanical devices for distal hemoperfusion during balloon catheter coronary angioplasty
Authors: Md Jacques Heibig , Md Paolo Angelini , Leachman D. Richard , Beall Madeline M. , Beall Arthur C. 
Published: March 2007

AbstractPrevious attempts to protect the dependent myocardium during balloon catheter coronary angioplasty in animals and humans have had generally unsatisfactory results. This paper summarizes the authors' experience in investigating commercially available mechanical pumps for distal coronary hemoperfusion during balloon angioplasty. Both roller and piston pumps can attain adequate distal perfusion without significant side effects in the majority of patients. Our goal was to suppress angina for at least 5 min to prolong balloon inflation in awake patients. Minor T‐wave changes without concomitant angina pectoris can be expected when the distal coronary bed is perfused with hypothermic blood. Side branch occlusion by the inflated balloon prevents effective protection of the corresponding part of the dependent myocardium during distal hemoperfusion, which may result in persistent angina and ST‐T changes uncorrected by increasing the hemoperfusion rate. Distal coronary diffuse spasm, rare and transient, was the only immediate complication of this procedure. It is suggested that intense local wall stimulation could occur with a higher flow rate (jet effect). Improved balloon catheter pressure/flow characteristics and on‐line continuous mechanical pumps should soon make distal coronary hemoperfusion through balloon catheters an accepted clinical technique.
Percutaneous transluminal angioplasty of a stenosis at the origin of the left internal mammary artery graft: A case report
Authors: Md Visuit Vivekaphirat , Yellen Steven F. , Md Alberto Foschi 
Published: March 2007

AbstractA case of percutaneous transluminal angioplasty of a high‐grade stenosis at the origin of the left internal mammary graft is presented. An investigational angled‐balloon dilating catheter was used.
Anomalous origin of the right coronary high above the left sinus of valsalva
Authors: Thatcher Jackson L. , Miller William P. 
Published: March 2007

AbstractAnomalous origin of the right coronary artery from the ascending aorta above the left sinus of Valsalva is exceedingly rare and previously has been reported to be associated with congenital aortic valve disease. We report a case of the right coronary artery arising from the mid ascending aorta, high above the left sinus, with a clinically and angiographically normal aortic valve.
Use of a conductance (volume) catheter and transient inferior vena caval occlusion for rapid determination of pressure‐volume relationships in man
Authors: Kass David A. , Md Mark Midei , Phd Willard Graves , Brinker Fsca Jeffrey A. , Md , Maughan W. Lowell 
Published: March 2007

AbstractDetermination of left ventricular pressure‐volume relationships in situ ideally requires both a method for easy measurement of multiple pressure‐volume loops and a rapid and reversible means of altering load. We report a technique, previously used in animals, that combines conductance catheter volumes and rapid inferior vena caval occlusion to permit routine measurement of calibrated P‐V relationships in man for the first time. An 8F volume catheter with a 3F micromanometer tipped pressure catheter placed through its lumen was advanced to the left ventricular apex through a femoral artery. A thermodilution output catheter was placed through a 9F femoral venous sheath and later replaced with an IVC balloon occlusion catheter, through which a 2.5F bipolar wire was advanced for atrial pacing. A specialized data system facilitated collection, editing, and data analysis at the time of cardiac catheterization. Absolute volume calibration required cardiac output measurement and injection of hypertonic saline. IVC occlusion decreased peak left ventricular pressure by 42 ± 17 (SD) (P < .001) mm Hg in 15 patients. Endsystolic pressure‐volume relationships (ESPVR) were determined with 5–8 cardiac cycles with an average of r2 of 0.94 ± 0.05 and were generally reproducible. The slope of the ESPVR demonstrated consistency among a group of normal patients (n = 6), and was significantly lower than the slope derived from a group of patients with ventricular hypertrophy (n = 9). We conclude that left ventricular pressure‐volume relationships can be easily and repeatedly determined as part of a routine cardiac catheterization in man.
Monitoring of ischemia during percutaneous coronary angioplasty: Influence of guidewire, balloon placement, and lead selection
Authors: Md Shereif Rezkalla , Md Bassam Moushmoush , Connors Brad C. , Turi Zoltan G. 
Published: March 2007

AbstractWe examined the sensitivity of the surface 12‐lead electrocardiogram (ECG) for detecting ischemia during guidewire and deflated balloon passage as well as during balloon inflation in proximal epicardial stenoses during percutaneous transluminal coronary angioplasty (PTCA) of 55 patients. Ischemia (ST change ⩾ 0.1 mV) by 12‐lead ECG was detected in 28% of patients after guidewire passage, in 50% after deflated balloon passage, and in 76% during balloon inflation vs. 17%, 14%, and 50%, respectively, by limb lead monitoring alone. The best single lead for detecting ischemia during PTCA was V2 for left anterior descending and circumflex and III for right coronary artery inflations. The addition of a selected second precordial lead further enhanced ischemia monitoring. We conclude that ischemia is common during PTCA even during wire and deflated balloon passage, that the 12‐lead ECG is more sensitive for monitoring ischemia during PTCA than conventional techniques, and that laboratories can optimize their ability to detect ischemia during PTCA by selecting appropriate leads.
Percutaneous transluminal angioplasty of anomalous right coronary artery
Authors: Mooss Aryan N. , Heintz Mary H. 
Published: March 2007

AbstractAngioplasty of anomalous coronary arteries can be technically challenging because of difficulty in selectively cannulating the aberrant vessel. We present our experience with angioplasty of an anomalous right coronary artery. A Judkins‐type left coronary catheter with an eccentric tip, the FL4‐G type catheter was used to obtain stable position in the right coronary artery and angioplasty was performed.
Angiography of right gastroepiploic artery for coronary artery bypass graft
Authors: Tanimoto Yoshinori , Matsuda Yasuo , Fujii Banyo , Kobayashi Yurio , Hayashi Kenji , Takashiba Kiyoshi , Hamada Yoshio , Hanazono Shigemi , Ando Keijiro , Hashimoto Takashi 
Published: March 2007

AbstractWe describe the angiographic technique of grafting the right gastroepiploic artery to the coronary artery. With the femoral approach, our specially devised catheter was placed in the common hepatic artery or gastroduodenal artery. The gastroepiploic artery and graft to the coronary artery were visualized satisfactorily by manual injection of contrast media.
Percutaneous transluminal angioplasty for innominate artery stenosis and total occlusion of subclavian artery in takayasu's‐type arteritis
Authors: Staller Bernard J. , Maleki Massoud 
Published: March 2007

AbstractPrevious reports describe high success rates achieved by dilating subclavian artery stenoses. Attempts at angioplasty for total occlusions have been uniformly unsuccessful. No previous case successfully recanalizing total subclavian artery occlusion was found after an extensive literature search. Modified guidewire technique facilitated safe crossing of the occlusion.
Intercoronary and intracoronary communications in four cases of vasospastic angina
Authors: Takatsu Fumimaro , Osugi Junichi , Sugiishi Munetaka , Suzuki Akira , Nagaya Teruo 
Published: March 2007

AbstractPersistent intercoronary and intracoronary communications were observed on cineangiograms in four patients having vasospastic angina without significant coronary narrowings. On provocation of coronary spasm using ergonovine maleate, these communications seemed to protect myocardium from ischemia, at least partially.
Aortic annular tear after valvuloplasty: The role of aortic annulus echocardiographic measurement
Authors: Lewin Ruben F. , Dorros Gerald , King James F. , Seifert Paul E. , Schmahl Terence M. , Auer James E. 
Published: March 2007

AbstractFollowing percutaneous transluminal aortic valvuloplasty, 2/100 patients (2%) developed significant aortic insufficiency as a result of an aortic annular tear. Both patients underwent emergency aortic valve replacement and survived the operation. One patient died 4 weeks postoperatively from sepsis and multiorgan failure, and the other patient had a benign postoperative course. In both cases, the balloon area significantly exceeded the aortic annular area and caused the complication. Review of the balloon area‐aortic annular area ratio in our series showed that a value of < 1.2 was not associated with this complication.
Severe aortic regurgitation complicating percutaneous aortic valve valvuloplasty
Authors: Dean Larry S. , Chandler Jerry W. , Saenz Carlos B. , Baxley William A. , Bulle Thomas M. 
Published: March 2007

AbstractAn 88‐year‐old patient undergoing percutaneous aortic balloon valvuloplasty of a tricuspid aortic valve is described. The patient had mild aortic regurgitation prior to the procedure but developed severe aortic regurgitation after balloon dilatation of the valve. At the time of surgery there was no anatomic disruption of the valve or supporting structures. Development of severe aortic incompetence following balloon valvuloplasty has not been previously reported.
Right to left interatrial shunting following balloon mitral valvuloplasty
Authors: Goldberg Neil , Roman Cecelia F. , Cha Se Do , Weiner Ronald , Maranhao Vladir , Eldredge Jay , Fernandez Javier 
Published: March 2007

AbstractA complication of balloon mitral valvuloplasty is development of left‐to‐right interatrial shunt. This report describes right‐to‐left interatrial shunting following balloon mitral valvuloplasty in a patient with mitral stenosis, tricuspid regurgitation and pulmonary hypertension.
Inadvertent Swan‐Ganz catheter placement in the left pericardiophrenic vein
Authors: McLellan Bruce A. , Jerman Michael R. , French William J. , Criley J. Michael , Pelikan Peter C. D. 
Published: March 2007

AbstractPlacement of flow‐directed Swan‐Ganz catheters without fluoroscopic guidance occasionally results in placement in positions other than the pulmonary artery. In the case presented, the inadvertent placement of such a catheter into the left pericardiophrenic vein was probably facilitated by distortion of the right heart and systemic venous anatomy.
Single coronary artery from the left sinus of valsalva
Authors: Vassanelli Corrado , Turri Marco , Morando Giorgio , Menegatti Giuliana , Zardini Piero 
Published: March 2007

AbstractA patient with chronic exertional angina and electrocardiographic signs of myocardial ischemia at exercise stress test had recent onset of rest chest pain and underwent coronary arteriography. Besides severe atherosclerotic coronary disease (which was probably responsible for clinical presentation), a single coronary artery arising from the left sinus of Valsalva was discovered. This is an exceptional finding, and its in‐life diagnosis may be relevant for surgical treatment.
A wire technique to cross the congenitally stenotic aortic valve
Authors: Adatia I. , Benson L. N. , Freedom R. M. 
Published: March 2007

AbstractWe describe a double‐catheter “rendezvous” technique that allows the successful placement of a balloon valvotomy catheter retrogradely across a congenitally stenotic aortic valve when traditional single‐catheter retrograde methods fail. An important therapeutic procedure that might otherwise be abandoned can be completed with only the additional procedure of a transseptal atrial puncture and a second arterial entry.
Dilating guide wire: Use of a new ultra‐low‐profile percutaneous transluminal coronary angioplasty system
Authors: Rizzo Thomas F. , Ciccone John , Werres Roland 
Published: March 2007

AbstractThe following case reports represent two examples using the newly released Dilating Guide Wire. The balloon‐wire system is specifically designed to be used as a steerable percutaneous transluminal coronary angioplasty (PTCA) guide wire. It can be utilized as a predilatation device in combination with a standard PTCA dilating balloon or as a free‐standing dilatation catheter. As applied to the following situations, predilatation proved to be an effective time‐ and step‐saving approach when confronting severely stenosed coronary artery lesions.
An improved catheter design for crossing stenosed aortic valves
Authors: Feldman Ted , Carroll John D. , Chiu Y. Christopher 
Published: March 2007

AbstractRetrograde catheterization of the left ventricle in patients with aortic valve stenosis is commonly performed using a pigtail or coronary arterial catheter. This approach, although usually ultimately successful, may be highly tedious. To overcome the limitations of these conventional catheter shapes, we have designed a catheter specifically for crossing stenotic aortic valves. In a group of 17 patients, mean aortic valve area 0.75 cm2, the average time to cross the aortic valve was 2 minutes 45 seconds and the median time 30–40 seconds. Once the proper size catheter was selected, the average time to cross was 59 seconds. The success of this catheter is based on the operator's ability to “scan” or interrogate the surface of the valve thoroughly by manipulating the catheter and a moveable core straight tip guidewire.
Transluminal balloon embolization of an inadvertent aorto‐to‐coronary venous bypass to the anterior cardiac vein
Authors: Jost Stefan , Simon Rüdiger , Amende Ivo , Herrmann Gunhild , Reil Gert‐Hinrich , Lichtlen Paul R. 
Published: March 2007

AbstractTherapeutic embolization of blood vessels by means of hardly steerable devices (e.g. metal coils, gel foam) can result in displacement of the emboli in the circulation. The embolization of an ACVB‐graft erroneously implanted to the anterior cardiac vein was performed, applying a catheter system with a detachable silicone rubber balloon.