bluuebunny/crossref_metadata_2025_split huggingface dataset:
Massive hemoptysis associated with isolated peripheral pulmonary artery stenosis
Authors: Matsumoto Alan H. , Delany David J. , Parker Leonard A. , Ney Kathryn A. 
Published: March 2007

AbstractA fatal case of massive hemoptysis in a patient with isolated peripheral pulmonary artery stenosis is described. Such patients are predisposed to developing pulmonary artery aneurysms. When hemoptysis develops, erosion of an aneurysm into an adjacent bronchus should be considered and aggressive diagnostic evaluation undertaken.
Approach to reduction of vascular complications of percutaneous valvuloplasty
Authors: Cole Patricia L. , Krone Ronald J. 
Published: March 2007

AbstractThe large‐bore arterial sheaths required for balloon valvuloplasty and intraaortic balloon pumps may be associated with substantial morbidity when introduced into the superficial femoral artery in elderly people, especially women and those with peripheral atherosclerosis. We report a total occlusion of the superficial femoral artery by a large intravascular sheath requiring subsequent surgical intervention. A femoral arteriogram using less than 10 cc of contrast through a 5F catheter can assure placement of the puncture into the common femoral artery prior to introducing the large sheath or catheter, thus reducing morbidity.
Semicircular curve catheter for pulmonary artery catheterization
Authors: Miller Gordon Chason 
Published: March 2007

AbstractCatheters with a distal curve consisting of a half circle of 7.5 cm diameter have been found to markedly facilitate pulmonary artery catheterization from either arm in adults. The full semicircular curve holds the tip off the lateral wall of the right ventricular outflow tract facilitating its passage, reducing arrhythmias, and reducing the chance of perforation. The curve was factory‐formed into both end‐hole type catheters for pressures, pulmonary wedging, and blood sampling and formed into side‐hole catheters with a closed‐end, as the NIH, for pulmonary angiograms. In 179 of 182 procedures, it was observed clearly to facilitate, to make more gentle, and to speed pulmonary artery catheterization as compared to catheters with lesser curves.
Postextrasystolic potentiation of systolic gradient in valvular aortic stenosis: Clinical usefulness and analysis of hemodynamic factors
Authors: Domingo Enric , Angel Juan , Alvarez Amparo , Anivarro Inocencio , Soler‐Soler J. 
Published: March 2007

AbstractTo analyze the behavior of aortic valve gradient (AVG) after ventricular extrasystole (VE), we studied 36 pure valvular aortic stenoses (AS) free of coronary artery disease and obstructive hypertrophic cardiomyopathy, in whom basal (B) (74 ± 32 mm Hg) and catheter‐induced post‐VE (110 ± 50 mm Hg) AVG were obtained. In all 26 cases with valve area <0.70 cm2, the post‐VE AVG was ≥70 mm Hg. In 19 cases AVG after two or more consecutive VE were also obtained. Maximal post‐VE AVG was obtained after multiple VE (19 cases) and/or after one VE causing a post‐VE pause equal or longer than 1.7 basal cardiac cycles (post‐VE RR ≥1.7B RR) (9 cases). Basal and postsingle VE AVG, up to a post‐VE RR ≥ 1.7 B RR, were a linear function of previous RR (r≥0.90), regression line slope increasing with AS severity (P =.05). Inotropic state measured by PEP/LVET only increased after multiple VE, P <.01. AVG after multiple VE was independent of post‐VE RR. Thus, (1) post‐VE potentiation of AVG may be seen with fixed valvular AS without obstructive cardiomyopathy; (2) post‐VE AVG is a function of compensatory pause after single VE and of increased inotropism after multiple VE; (3) analysis of maximal post‐VE AVG generated as described is reliable and useful for assessing AS severity (post‐VE AVG ≥ 70 mm Hg meaning an aortic valve area <0.70 cm2) and may supplement valve area calculations.
Progression of left main coronary artery stenosis following left anterior descending coronary artery angioplasty
Authors: Harper J. Michael , Shah Yogesh , Kern Morton J. , Vandormael Michel G. 
Published: March 2007

AbstractAlthough recent clinical experience indicates a high success rate, percutaneous transluminal coronary angioplasty (PTCA) is still associated with serious complications which usually occur during or shortly after the procedure and are principally related to the lesion or segment of vessel being dilated. We report 2 cases of subacute progression within months of left main stenosis following successful, uncomplicated left anterior descending (LAD) coronary PTCA. Identification of left main trunk involvement may mandate earlier follow‐up or intervention.
Percutaneous transluminal coronary angioplasty of anomalous left circumflex coronary artery
Authors: Kimbiris Demetrios , Lo Eric , Iskandrian Abdulmassih 
Published: March 2007

AbstractWe present our experience of percutaneous transluminal coronary angioplasty in two patients with an anomalous left circumflex coronary artery with severe stenosis. In the first case, the anomalous vessel originated from the first portion of the right coronary artery, and in the second case it originated from the right sinus of Valsalva. Cannulating the anomalous vessel with the guiding catheter can be difficult. The right Judkins‐type catheter, with a posteriorly directed tip, is the most appropriate catheter for cannulating the anomalous circumflex artery when the vessel originates from the first portion of the right coronary artery, and the left Amplatz‐type 1 is most appropriate when the vessel originates from the right sinus of Valsalva.
A new technique for angioplasty of occluded coronary arteries and bypass grafts, not associated with acute myocardial infarction
Authors: De Swart J. B. R. M. , van Gelder L. M. , van der Krieken A. M. , El Gamal M. I. H. 
Published: March 2007

AbstractWe describe a new technique for angioplasty of totally occluded coronary arteries and bypass grafts in the absence of acute myocardial infarction. We used a guiding catheter, a coronary infusion catheter, and a relatively stiff steerable guide wire to perforate the occlusion. Angioplasty of the recanalized vessel was subsequently performed. The procedure was attempted in nine patients; it was successful in eight. There were no complications. The advantages of this technique are discussed.
Does intracoronary papaverine dilate epicardial coronary arteries? implications for the assessment of coronary flow reserve
Authors: Zijlstra F. , Reiber J. H. C. , Serruys P. W. 
Published: March 2007

AbstractIntracoronary papaverine is used as a means to induce a strong and short‐lasting hyperemia in several recently developed methods to measure coronary flow reserve. Changes in stenosis geometry from papaverine would influence the measured coronary flow reserve. Therefore, we investigated the influence of intracoronary papaverine on stenosis geometry with quantitative analysis of the coronary angiogram and assessed the influence of papaverine on pressure‐flow characteristics of the stenosis and coronary flow reserve. The cross‐sectional areas (mean ± SD) of the stenosis increased 18% ± 7% after papaverine. The normal proximal and distal parts of the coronary artery dilated 5% ± 2% after papaverine. This results in a decrease of the calculated pressure drop over the stenosis varying from 20% to 30%. Coronary flow reserve of a flowlimiting epicardial stenosis is overestimated by 16% when papaverine is used to induce hyperemia. These papaverine‐induced changes can nevertheless be circumvented by maximal vasodilation of the major epicardial coronary artery with 3 mg intracoronary isosorbidedinitrate prior to the investigation of the coronary flow reserve with papaverine.
Double‐wire angioplasty of the right coronary artery bifurcational stenosis
Authors: Nath Amar , Vetrovec George W. , Cowley Michael J. , Newton Mark , Disciascio Germano , Mukharji Jhulan , Lewis Stephen A. 
Published: March 2007

AbstractTwo cases of distal right coronary artery (RCA) bifurcational stenoses involving ostia of the posterolateral (PLA) and the posterior descending (PDA) branches in patients who underwent successful coronary angioplasty using a double‐wire technique are reported. A single guiding catheter and sequential balloon inflations were utilized in one, and two guiding catheters and simultaneous balloon inflations in the other. The indications, techniques, and outcomes are described.
Percutaneous balloon valvuloplasty and coronary angioplasty for the treatment of calcific aortic stenosis and obstructive coronary artery disease in an elderly patient
Authors: Vandormael Michel , Deligonul Ubeydullah , Gabliani Gregory , Chaitman Bernard , Kern Morton J. 
Published: March 2007

AbstractAn 81‐year‐old man with severe calcific aortic stenosis and coronary artery disease who refused surgical therapy was treated with sequential percutaneous balloon aortic valvuloplasty (PBAV) and percutaneous transluminal angioplasty. Before percutaneous balloon valvuloplasty, the mean aortic gradient was 76 mmHg, and the aortic valve area was. 45 cm2. The aortic valve was dilated using 15‐mm and 18‐mm balloons. The mean gradient decreased to 40 mmHG, and the aortic valve area increased to.62 cm2. Percutaneous transluminal coronary angioplasty (PTCA) was performed 2 weeks later, and an 85% proximal left circumflex stenosis was successfully dilated to 20%. No complications were noted during either procedure. At 6‐month follow‐up, the patient had returned to normal activities and was asymptomatic. Thus, combined therapy with PBAV and PTCA is technically feasible in selected elderly patients with calcific aortic stenosis and anatomically suitable coronary artery disease. This nonsurgical therapeutic approach may be useful in the treatment of selected patients who refuse or who are deferred from cardiac surgery.
Hemodynamic effects of contrast media during coronary angiography: A comparison of three nonionic agents to Hypaque‐76
Authors: Piao Zhen En , Murdock David K. , Hwang Ming H. , Raymond Richard M. , Scanlon Patrick J. 
Published: March 2007

AbstractCoronary angiography with standard ionic contrast media is associated with marked alterations in cardiac hemodynamics because of the depressant effects of the contrast media on cardiac contractility. Nonionic contrast media have been reported to produce less hemodynamic alteration than standard ionic contrast media. However, there is no information on how one nonionic media compares to another. Thus we compared the hemodynamic effects of three nonionic contrast media, lopamidol (IOP), lohexol (IOH), and loversol (IOV) to each other as well as to the standard ionic contrast media Hypaque‐76 (H76). In 20 closed‐chest anesthetized dogs, we recorded the maximal change in left ventricular systolic pressure (LVSP), mean aortic pressure, left ventricular diastolic pressure (LVDP), and left ventricular dp/dt during 10‐cc left main coronary artery injections of H76, IOP, IOH, and IOV. The mean aortic pressure and LVSP decreased 36 ± 17 mm Hg and 46 ± 21 mm Hg with H76 but only 5 ± 5 mm Hg and 6 ± 5 mm Hg with IOP, 5 ± 4 mm Hg and 6 ± 6 mm Hg with IOH, and 5 ± 4 mm Hg and 7 ± 6 mm Hg with IOV (P < 0.001). The LVDP increased 6 ± 5.0 mm Hg with H76 out only 0.2 ± 0.5 mm Hg with IOP, 0.2 ± 0.3 mm Hg with IOH, and 0.5 ± 1.0 mm Hg with IOV (P < 0.001). The LV dp/dt decreased 545 ± 261 mm Hg/sec with H76 but increased 886 ± 477 mm Hg/sec with IOP, 910 ± 96 mm Hg/sec with IOH, and 473 ± 335 mm Hg/sec with IOV (P < 0.001). Whereas each nonionic agent produced significantly less hemodynamic abnormalities than H76, there was no significant difference between any of the nonionic agents on any hemodynamic parameter. Thus, as compared to H76, these nonionic contrast media produced only trivial alterations in hemodynamics and LV dp/dt. These agents may be preferable in patients with LV dysfunction.
Balloon inflation following injection of contrast material through the distal lumen of the USCI balloon catheter
Authors: McEniery Paul T. , Grigera Fernando , Chambers James , Franco Irving , Hollman Jay 
Published: March 2007

AbstractWe report on four patients in whom we observed inflation of the balloon following injection cf contrast material into the distal lumen during percutaneous transluminal coronary angioplasty. This is a rare technical problem. However, inadvertent balloon inflation may cause transient occlusion of the proximal coronary artery and in one case was associated with acute occlusion of a vessel that had been dilated. Management involves prompt deflation of the balloon.
Acute total aortic occlusion during cardiac catheterization associated with polycythemia vera
Authors: Zinn Philip , Applegate Robert J. , Walsh Richard A. 
Published: March 2007

AbstractWe present a case of acute total aortic occlusion at the time of cardiac catheterization in a 62‐yr‐old female with an acute myocardial infarction and newly diagnosed polycthemia vera. Despite normalization of serum viscosity and red cell mass by phlebotomy, her predisposition to thrombosis persisted. Caution is advised when considering cardiac catheterization in patients with this disease.
Transpancreatic catheterization of the right hepatic artery for chemoembolization using a new infusion system
Authors: Quinn Michael F. , Lundell Caroline J. , Daniels John R. , Vegh Gabriel B. , Engelson Erik T. 
Published: March 2007

AbstractThe right hepatic artery was catheterized for chemoembolization in a patient with liverdominant metastatic breast carcinoma and occlusion of the celiac artery by tumor compression. This was accomplished by use of a new coaxial infusion catheter‐steerable guidewire system passed through the superior mesenteric artery and posterior pancreatic arcade.
Transfemoral coronary arteriography via a prosthetic aortic bifurcation graft
Authors: Smith Douglas C. , Willis William H. 
Published: March 2007

AbstractAngiographers may inappropriately avoid the transfemoral access route when a prosthetic aortic bifurcation graft exists. An aortofemoral graft will necessitate overdilatation of the femoral puncture site to allow adequate manipulation. If the puncture transverses both walls of the femoral limb of the graft into the native artery, further withdrawal of the catheter will allow reentry into the graft. When an aorta‐to‐external‐iliac, end‐to‐side graft is present, transfemoral catheterization will frequently result in the guide wire or catheter tip terminating in the occluded common iliac artery. By choosing the proper catheter, entrance into the distal limb of the proximally communicating graft may be achieved. For the unwary operator, these confusing situations may result in failure to properly catheterize the graft. The methods of successfully overcoming these problems are discussed and illustrated.
Technical consideration for a new X‐ray video progressive scanning system for cardiac catheterization
Authors: Wondrow Merrill A. , Bove Alfred A. , Holmes David R. , Gray Joel E. , Julsrud Paul R. 
Published: March 2007

AbstractThe widespread growth of interventional angiographic procedures has expanded the use of X‐ray video systems. Reduced radiation exposure to the patient and staff has been recently reported by implementing a new pulsed progressive scanning video system. We have shown that this system, which enables the pulsing of the X‐ray generator at 30 pulses per second, results in a 50% reduction in radiation exposure. The technical parameters and implementation of a progressive scanning video system are discussed. Image quality, temporal and spatial resolution, and signal‐to‐noise ratio (SNR) were assessed using conventional interlaced and progressive video scanning. These comparisons documented improved resolution, no degradation of ejection fraction measurements, improved clinical images, and a 1.0‐dB improvement in the SNR with the progressive scanning. Progressive scanning video systems reduce radiation exposure and provide an objective improvement in image quality over conventional scanning video systems.
Hemodynamic and electrocardiographic consequences of high‐ and low‐osmolality contrast agents for left ventricular angiography
Authors: Vik‐Mo Harald , Rosland Gunnar A. , Følling Magne , Danielsen Ragnar 
Published: March 2007

AbstractThe cardiovascular effects of two nonionic contrast agents with low osmolality (iohexol and metrizamide) were compared with one standard ionic, high‐osmolality contrast agent (metrizoate) used for left ventricular (LV) angiography in patients with coronary heart disease. Metrizoate induced a marked elevation of LV end‐diastolic pressure and LV systolic pressure and an increase in cardiac output after a delay of a few minutes. All these changes were significantly less severe with iohexol and metrizamide. Hypotension occuring 30 sec after LV angiography was observed only with use of metrizoate. All agents increased heart rate, but the increase after metrizoate was significantly more pronounced and prolonged. The PQ and QT interval was prolonged only by metrizoate. The subjective symptoms were significantly more marked with metrizoate than with the two other agents. Thus the new nonionic contrast agent iohexol and metrizamide produced markedly less hemodynamic and electrocardiographic disturbance than the ionic agent metrizoate.
Unusually long inflation times during percutaneous transluminal coronary angioplasty
Authors: Palazzo Angela M. , Gustafson Gregory M. , Santilli Eugene , Kemp Harvey G. 
Published: March 2007

AbstractUnusually prolonged balloon inflations (PBI) during percutaneous transluminal coronary angioplasty (PTCA) have been utilized in 26 consecutive patients to establish adequate coronary perfusion after shorter inflation times resulted in severe residual stenosis (N = 15), early arterial closure (N = 5), or extensive dissection (N = 6). Inflations lasted 1.5 to 15 min and 23/27 stenoses were successfully dilated. The average reduction in stenosis was 67% (90%–33%). Chest pain occurred in 34% vs. 7% (P < 0.01), and ST changes occurred during 66% vs. 57% (NS) of PBI vs. short inflations.
Thromboembolic complications in coronary angiography associated with the use of nonionic contrast medium
Authors: Grollman Julius H. , Liu Chi Kong , Astone Robert A. , Lurie Mark D. 
Published: March 2007

AbstractThromboembolic complications occurred during diagnostic coronary arteriography in three patients in spite of systemic heparinization. These mishaps were associated with the use of a nonionic contrast medium, which is known not to have a significant protective effect on coagulation pathways. If nonionic contrast media are to be used in angiographic studies of critical organs, meticulous technique is imperative, and adequate systemic heparinization is recommended.
Percutaneous femoral transluminal angioplasty of a right brachial artery occluded after sones coronary angiography
Authors: Maouad Joseph , Guermonprez Jean Léon 
Published: March 2007

AbstractA case of percutaneous transluminal angioplasty (PTA) from the groin to a 7‐cm right brachial artery occlusion in a 41‐year‐old man, having previously undergone Sones coronary angiography 2 months earlier, is presented. The post‐PTA angiogram shows near‐normal reconstitution of the total obstruction, persisting after 6 months with complete loss of collateral circulation. In a case of total obstruction of the brachial artery, femoral PTA should be considered before resorting to surgical treatment.
Clinical experience with the Monorail balloon catheter for coronary angioplasty
Authors: Finci Leo , Meier Bernhard , Roy Paul , Steffenino Giuseppe , Rutishauser Wilhelm 
Published: March 2007

AbstractThe Monorail balloon catheter is distinctly different from other current balloon catheters: the guidewire passes through the balloon itself, exits the catheter proximal to the balloon, and runs alongside its small shaft (3 French) through the guiding catheter. Monorail coronary angioplasty was attempted in 61 patients on 73 lesions with balloons from 2.0 to 3.7 mm. Angiographic success was obtained in 66 lesions (90%). For 15 lesions, balloon exchanges were needed. In three lesions, the Monorail balloon failed to cross the lesion, while a standard balloon succeeded; two lesions could not be crossed with any balloon. Vessel occlusion occurred in four patients: two had emergency surgery without infarct (one died suddenly 4 days later and one had a stroke 1 day later), one was recanalized with a standard balloon, and one had a myocardial infarct. Continuous infusion of urokinase was used until patient 3 in whom problems with the delivery system led to cardiocerebral air embolization (with complete recovery). No thrombotic complications were observed in the subsequent 58 patients with only a bolus of 10,000 U of heparin. The Monorail balloon facilitates contrast injections and balloon exchanges but appears more difficult to pass through tight lesions. Omission of the previously recommended infusion with a thrombolytic agent proved safe.
Percutaneous mitral valvuloplasty: Retrograde, transarterial double‐balloon technique utilizing the transseptal approach
Authors: Babic Uros U. , Dorros Gerald , Pejcic Petar , Djurisic Zoran , Vucinic Mihailo , Lewin Ruben F. , Grujicic Sreten N. 
Published: March 2007

AbstractBetween February 1985 and May 1987, 72 patients with mitral stenosis (MS) underwent percutaneous transluminal mitral valvuloplasty (PTMV). The retrograde transarterial double‐balloon technique was used on 54/72 patients (75%); 16 males, 38 females; mean age: 39 ± 11 years. Transseptal catheterization was used to place two 0.035″, 350‐cm exchange wires into the ascending aorta in order to be snared, retrieved, and exteriorized, each through a femoral artery. Over these wires, the balloon dilation catheters were advanced through the femoral artery, retrogradely, across the mitral valve, for PTMV. The transmitral mean gradient fell [18 ± 4 to 9 ± 5 mmHg (P < 0.001)]; the cardiac output increased [5.1 ± 0.8 6.1 ± 0.8 L/min (P < 0.001)]; the hemodynamically calculated valve area increased [1.2 ± 0.2 to 2.3 ± 0.6 cm2 (P < 0.001)]; and the short axis two‐dimensional echocardiographic valve area increased [1.1 ± 0.3 to 2.2 ± 0.7 (P < 0.001)]. PTMV was unsuccessful in two patients (4%), due to the inability to maintain the inflated balloons in the mitral position. Significant complications were encountered in two patients: two strokes (3.7%) and one mortality from the stroke (1.4%). Significant mitral regurgitation occurred in two patients (3.7%); no post‐PTMV hemodynamically significant atrial septal defects were detected. Follow‐up (mean time: 11 ± 6 months) of 43 patients showed a persistent improvement in echocardiographic findings in 27 (63%) and hemodynamically measured mitral valve area in the 16 patients in which cardiac catheterization was repeated. The retrograde, transarterial double‐balloon technique can successfully accomplish PTMV with good results and an acceptable low morbidity and mortality.
Pulsed doppler evaluation of regurgitation in mitral valve prostheses
Authors: Azuma Steven S. , Abbasi A. S. , Fraser Allan , Hebel Laura L. , Bernstein William L. , Decristofaro Dominic 
Published: March 2007

AbstractProsthetic mitral valve regurgitation was evaluated by both pulsed Doppler ultrasound and left ventriculography. Pulsed Doppler ultrasound was found to have only a 20% sensitivity in detecting prosthetic mitral valve regurgitation documented by left ventriculography. Possible reasons for this poor sensitivity include 1) an eccentric jet not identified by the small pulsed Doppler sample volume; 2) prothesis interference with the Doppler signal in the apical four chamber view; and 3) the large angle of incidence between the pulsed Doppler signal and the regurgitant jet. Mitral insufficiency, especially when not severe, may be missed by this technique. Care must be taken in interpreting negative results from a pulsed Doppler ultrasound evaluation of a prosthetic mitral valve.