bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rotational ablation of coronary artery lesions using single, large burrs
Authors: Zacca Nadim M. , Kleiman Neal S. , Rodriguez Arsenio R. , Heibig Jacques , Warth David , Harris Scott , Minor Steven T. , Raizner Albert E. 
Published: March 2007

AbstractPrevious clinical use of the Rotablator(TM) In coronary artery disease has involved a sequential increase in burr sizes up to 2 mm in diameter and has often utilized balloon adjunct to achieve an optimal result. We report our experience and describe our technique using a single, large burr (2.25, 2.5, or 2.75 mm diameter) without balloon assistance. The burr size was selected to approximate 70–90 percent of the apparent normal lumen diameter. Thirty‐one patients with 36 lesions of complex morphology (eccentric, irregular, calcified, ulcerated, at bends, at bifurcations, completely occluded, as well as balloon failures) were successfully treated with the Rotablator(TM). Results were assessed by computerized quantitative angiography. The percent diameter stenosis (mean ± SD) for the group was reduced from 69.8 ± 11.3% to 30.9 ± 10% (p < 0.001). The mean absolute diameter stenosis increased from 0.9 ± 0.3 mm to 2.2 ± 0.3 mm (p < 0.001). Angiographically visible dissections were seen in 4 patients and were uncomplicated in 2. One patient had a non‐Q‐wave myocardial infarction. A fourth patient had a presumed acute occlusion 36 hr after the procedure, necessitating emergency bypass surgery, but without Q waves on the electrocardiogram or wall‐motion abnormalities on the echocar‐diogram. Nitroglycerin was infused through the Rotablator(TM) catheter and has considerably lowered the degree and frequency of spasm. No other acute complications occurred. The mean procedure time using a single burr was shorter than when multiple burrs were used: 56.5 vs. 97.3 min, respectively (p < 0.05). The use of a single, large‐size Rotablator(TM) burr is an effective method of treating complex coronary stenoses without balloon assistance and has an encouragingly low complication rate and short procedure time. © 1992 Wiley‐Liss, Inc.
Accelerated coronary artery stenosis at a site proximal to coronary angioplasty
Authors: Voyce Stephen J. , Carey Kevin T. , Weiner Bonnie H. , Laifer Lawrence I. , Folland Edward D. 
Published: March 2007

AbstractRapid progression of coronary stenosis has been described in patients undergoing percutaneous transluminal coronary angioplasty (PTCA), typically resulting in symptomatic angina 3 to 30 months postprocedure. We report a case of accelerated coronary stenosis in the instrumented vessel resulting in angina 3 days post‐PTCA. © 1992 Wiley‐Liss, Inc.
Percutaneous fenestration of dissecting intima with a transseptal needle. A new therapeutic technique for visceral ischemia complicating acute aortic dissection
Authors: Saito Shigeru , Arai Hidekazu , Kim Kunikane , Aoki Naoto , Tsurugida Masanobu 
Published: March 2007

AbstractNoncardiac visceral ischemia is a major complication with acute aortic dissection and is caused by obstruction of the major visceral arteries by dissecting intima. Two patients with this condition underwent emergency percutaneous fenestration of dissecting intima, and the blood flow to the lower extremity and kidney was restored. A transseptal needle and peripheral angioplasty balloon catheter were used for fenestration. There were no associated complications in either patient. One patient was treated medically and another had ascending aortic replacement surgery the day after percutaneous fenestration. Clinical follow‐up of 10 and 5 months, respectively, revealed good clinical outcomes. Percutaneous fenestration should be considered the treatment of choice for visceral ischemia due to acute aortic dissection. © 1992 Wiley‐Liss, Inc.
Progression of Takayasu's aortitis in a young japanese woman: Serial angiographic study
Authors: Iga Kanji , Hori Kenjiro , Matsumura Tadashi , Gen Hiromitu , Tamamura Toshitake 
Published: March 2007

AbstractProgression of Takayasu's aortitis was observed by serial angiography over 2 years. Acute aortic regurgitation due to marked dilatation of the proximal ascending aorta was followed by aneurysmal dilatation of the distal ascending aorta. Aneurysmal dilatation of the carotid arteries then developed, with subsequent obstruction of both the bilateral vessels by thrombosis. © 1992 Wiley‐Liss, Inc.
Initial and long‐term results of percutaneous transluminal coronary angioplasty in patients 75 years of age and older
Authors: ten Berg J.M. , Bal E.T. , Joe Gin R.M. Tjon , Ernst J.M.P.G. , Mast E.G. , Ascoop C.A.P.L. , Defauw J.J.A.M. , Plokker H.W.M. 
Published: March 2007

AbstractIn 212 patients aged 75 years and older the immediate and long‐term results of percutaneous transluminal coronary angioplasty (PTCA) were assessed. For 293 stenoses the primary angiographic success rate was 96% and the overall clinical success rate was 90.6%. Angioplasty caused a myocardial infarction in 7 patients (3.3%), 2 patients (0.9%) needed emergency aorto coronary bypass surgery, and 4 patients (1.9%) died following the procedure. Actuarial 7 year survival was calculated at 69.3% with a standard deviation (SD) of 8%. Actuarial cardiac survival at 7 years was 92.1% (SD 3%), whereas non‐cardiac survival at 7 years was 75.3% (SD 9%). Actuarially, at 7 years 98.5% (SD 1%) were estimated to remain free from myocardial infarction in the angioplasty‐related area, 95.7% (SD 2%) to remain free from any myocardial infarction, 93.9% (SD 2%) to remain free from re‐PTCA because of a recurrence, 84.7% (SD 5%) to remain free from any re‐PTCA, and 97.1% (SD 2%) to remain free from (re)‐operation. Fifty‐two point three percent (SD 8%) were estimated to remain free from any cardiac event. If recurrence of angina is taken into account, only 25.8% (SD 13%) remain asymptomatic during 7 years follow‐up. After successful angioplasty in patients aged 75 and older the chance of remaining free from any event or angina at 7 years actuarial follow‐up gets as low as 15.7% (SD 9%).We conclude that in selected elderly patients angioplasty can be performed with a high success rate, although the periprocedural mortality and morbidity appear to be higher than in the younger age group. During long‐term follow‐up, most of the patients remain free of cardiac events and survival appears to be largely dependent on non‐cardiac factors. However, long‐term relief from angina is probably less than in younger patients. © 1992 Wiley‐Liss, Inc.
Coronary stenting: Single institution experience with the initial 100 cases using the Palmaz‐Schatz stent
Authors: Colombo Antonio , Maiello Luigi , Almagor Yaron , Thomas Jack , Zerboni Santino , Summa Michele Di , Finci Leo 
Published: March 2007

AbstractWe studied 100 patients who had coronary implantation of Palmaz‐Schatz stents in our institution from November 1989 until March 1991. A total of 126 standard and 6 short stents were implanted. The patients' mean age was 58 ± 5 years, and 97 were males. The indications were lesions with high risk of restenosis (29 patients), restenosis (27 patients), suboptimal result of angioplasty (24 patients), dissection (16 patients), and recanalized chronic total occlusion (6 patients). In 17 patients a brachial cut‐down approach was used. Stents were correctly placed in 98 patients. Stent related complications occurred in 9 patients: major ischemic complications in 7 patients (acute myocardial infarction in 2 patients, emergency bypass surgery in 3 patients and emergency angio‐plasty in 2 patients); in 3 of these patients there was a subacute closure of the stent and in 2 patients there were delivery problems. Vascular complications at the site of arterial puncture occured in 3 patients (some patients had more than one complication). A learning curve was observed. There was a decrease in the complication rate with the higher number of patients treated: 28% for the first 50 patients and 6% for the last 50 patients. Clinical follow‐up was available in all patients. Of the 92 patients eligible for follow‐up (7 ± 2 months), 69 patients were asymptomatic and 23 had recurrence of angina: 19 patients for stent restenosis and 4 patients for coronary artery disease progression. Follow‐up angiogram was done in 79/92 (86%) patients: 21 had restenosis (27%). Restenosis rate was higher in patients with multiple stents 40% (6/15) than with the single stent 23% (15/64), and when the indications were for dissection 35% (6/17). These differences did not reach statistical significance. The global incidence of restenosis appears to be lower when compared to balloon coronary angloplasty, although there is no garantee these populations are comparable. Stenting seems to be a good alternative to coronary angioplasty in lesions which are not considered ideal for the balloon dilatation and to treat occlusive dissections. The use of multiple and partial overlapping stents is associated with a high restenosis rate. These impressions need to be tested in a large, randomized, multicenter study. © 1992 Wiley‐Liss, Inc.
Multicenter dose‐finding trial for thrombolysis with urokinase preactivated pro‐urokinase (TCL 598) in acute myocardial infarction
Authors: Gulba Dietrich C. , Bode Christoph , Sen Semi , Topp Jürgen , Fischer Klaus , Wolf Helmut , Hecker Hartmut 
Published: March 2007

AbstractIn a multicenter dose‐finding study, the thrombolytic potency of urokinase preactivated pro‐urokinase was evaluated. Sixty‐two patients were randomly assigned to receive 250,000 U of urokinase plus either 4.5 mega U (group I: n=33) or 6.5 mega U (group II: n = 29) of pro‐urokinase. Patency rates were 36.4% (20.4–54.9%) vs. 54.5% (36.3–71.9%) (n=27) at 60 minutes and 55.6% (32.5–70.6%) vs. 62.1% (42.3–79.3%) at 90 min into thrombolysis (n.s.). In a third group of 12 patients treated with 500,000 U of urokinase plus 6.5 mega U of pro‐urokinase patency was achieved in 33.3% (9.9–65.1%) and 41.7% (15.2–72.3%) at 60 and 90 min, respectively. Patency rates at 24 hr follow‐up angiography (n= 35) were 78.6% (49.2–95.3%), 85.7% (57.2–98.2%), and 85.7% (42.1–99.6%). Coagulation analysis in 37 patients revealed similar alterations in the three treatment groups with minor decreases in fibrinogen levels, moderate drops in plasminogen and α‐2‐antiplasmin levels, and moderate increases in the concentrations of the total fibrino‐gen/fibrin degradation products, the differences between the groups not being significant. Bleeding complications were observed in 12.9%, 13.8%, and 25% of patients in groups I, II, and III, respectively, mainly related to catheter sites. Hence, the safety profile of urokinase preactivated pro‐urokinase seems comparable to other thrombolytic regimens. Reopening of occluded coronary arteries, however, is achieved relatively slowly. Thus, in its use for thrombolysis in myocardial infarction, urokinase preactivated pro‐urokinase does not seem to offer superior advantages. © 1992 Wiley‐Liss, Inc.
Maximum stress‐volume index ratio of the left ventricle in hypertrophic cardiomyopathy
Authors: Nakagawa Makoto , Shirato Kunio , Sakuma Masahito , Ishigaki Hidehiko , Ohe Masatoshi , Ikeda Jun , Takishima Tamotsu 
Published: March 2007

AbstractTo evaluate the left ventricular contractile state in patients with nonobstructive hyper‐trophic cardiomyopathy (HCM), we analyzed the maximum stress‐volume index ratio (MSVR) using catheter‐tip cineangiography in 11 patients with HCM and 16 normal subjects. The value of the MSVR in normal subjects was 6.48±1.25 kdyn/cm5/m2 (mean±SD) and we defined the range of the mean±2 SD as the normal MSVR range. Six patients with HCM placed inside the normal MSVR range (IN), but the other 5 patients placed outside and to the right of the normal range (RIGHT). This suggests that the contractile states of the patients of the RIGHT group were depressed. Compared with IN, the end‐diastolic and end‐systolic volume Indices of RIGHT were larger (EDVI; 69.3±6.9 vs. 96.1 ±11.1 ml/m2, p<0.01, ESVI; 18.2 ± 3.2 vs. 29.1 ±8.3 ml/m2, p<0.05), but the ejection fraction did not differ (IN 73.5±5.7 vs. RIGHT 69.6±8.3%, NS). End‐diastolic pressure of IN and RIGHT was higher than that of normal subjects (IN 16.5±4.5, RIGHT 16.7±4.6 vs. 8.3±2.5 mm Hg, both p<0.05), but there was no difference between the two groups in HCM. End‐systolic pressure did not differ among the three groups. End‐diastolic, mean systolic, and end‐systolic stresses of IN were similar to those of RIGHT Left ventricular wall thickness (RIGHT 1.66±0.22 vs. IN 1.36±0.14 cm, p<0.05) and mass index (RIGHT 272.2±25.5 vs. IN 176.1 ±19.0 g/m2, p<0.01) of RIGHT were larger than those of IN. Furthermore, there were linear inverse relations between the MSVR and the end‐diastolic volume index (r= −0.84) and between the MSVR and mass index (r=‐0.91) in the 11 patients with HCM. These results suggest that there were two groups among the HCM patients, that is, those with normal (or preserved) and those with depressed contractile states, and patients with large end‐diastolic volume indices and increased mass indices tended to have depressed contractile states. © 1992 Wiley‐Liss, Inc.
Ambiguous coronary angiography: Clinical utility of intravascular ultrasound
Authors: White Christopher J. , Ramee Stephen R. , Collins Tyrone J. , Jain Ashit , Mesa Juan E. 
Published: March 2007

AbstractWe report the use of intravascular ultrasound (IVUS) in situations where angiography was ambiguous or uncertain in assessing the significance of coronary stenoses. The indications for performing intravascular ultrasound were (1) angiographic findings did not correlate with the clinical presentation (n = 5) and (2) the lesion was not seen well by angiography because of overlapping vessels at the site of suspected stenosis (n=3). We studied eight lesions in seven patients. Six nonobstructive stenoses on angiography were shown by IVUS to be significant. In two patients, stenoses were thought to be significant on angiography, but, due to overlapping of the vessels, there was doubt regarding the severity of the narrowing. In these two patients, IVUS clearly showed that the lesions were nonobstructive. As seen from the above results, angiography underestimated 6/8 stenoses and overestimated in 2/8 stenoses when compared to IVUS. We conclude that IVUS can be used to clarify ambiguous angiographic findings which can have a major impact on the clinical decision making. © 1992 Wiley‐Liss, Inc.
Complete heart block complicating retrograde left‐heart catheterization of patients with cardiac allografts
Authors: Sack Jeffrey B. , MaCalpin Rex , Gerber Richard , Gupta Vinod K. , Sherman C. Todd , Yeatman Larry 
Published: March 2007

AbstractThe development of complete heart block during left‐sided cardiac catheterization is an uncommon event. We describe three cases of complete heart block complicating leftsided cardiac catheterization of patients with cardiac allografts. Review of the cases performed at our institution suggests that complete heart block during left‐sided cathe‐terization may be more common in patients with cardiac allografts. © 1992 Wiley‐Liss, Inc.
Transseptal catheterization update 1992
Authors: Clugston Richard , Lau Francis Y.K. , Ruiz Carlos 
Published: March 2007

AbstractResurgence of the transseptal procedure in the last decade has occurred coincident with the advent of therapeutic catheterizations and in particular mitral balloon valvuloplasty. As larger numbers of these procedures have been performed, experience shows that the position of intended septal puncture varies for each anticipated procedure and need not lie at the fossa ovalis, which is frequently displaced or inaccessible. Recognizing the dynamic alterations in septal and atrial anatomy that accompany the various combinations of valvular heart disease, the experienced interventionalist will use precatheterization echo and radiological techniques to enable precise and localized transseptal puncture. Using these techniques in 597 patients for valvular heart disease, we have had no deaths and a morbidity of 1.8% with the transseptal puncture. © 1992 Wiley‐Liss, Inc.
Prolonged intravenous urokinase infusion: An alternative pharmacologic approach in the treatment of thrombus‐containing saphenous vein graft stenoses
Authors: Cospito Peter D. , Popma Jeffrey J. , Satler Lowell F. , Leon Martin B. , Kent Kenneth M. , Pichard Augusto D. 
Published: March 2007

AbstractA subtotally occlusive saphenous vein graft stenosis resolved after rapid intracoronary and prolonged intravenous urokinase infusion. Additional therapy was unnecessary, avoiding the attendant risks of saphenous vein graft angioplasty. Combined intracoronary and intravenous urokinase infusion should be considered prior to coronary angioplasty of saphenous vein graft stenoses, particularly when diffuse degeneration is present or the risk of underlying thrombus is high. © 1992 Wiley‐Liss, Inc.
New approach to management of intraaortic balloon pumps in patients with peripheral vascular disease: Case reports of four patients requiring urgent IABP insertion
Authors: Lewis Bruce E. , Sumida Colin , Hwang Ming H. , Loeb Henry S. 
Published: March 2007

AbstractFour selected cases of emergent IABP insertion in PV patients are presented. After angiographic documentation of critical iliac stenosis, conservative peripheral angioplasty was performed prior to IABP insertion. No patient experienced a peripheral ischemic event associated with IABP use. © 1992 Wiley‐Liss, Inc.
Guidelines for the performance of outpatient catheterization and angiographic procedures
Authors: Clark David A. , Moscovich Michael D. , Vetrovec George W. , Wexler Lewis 
Published: March 2007

AbstractCardiac catheterization and angiography is a safe procedure performed on patients with suspected or potentially serious cardiovascular disorders. Complications of the procedure are related both to heart disease itself and to elements of the procedure. For a variety of social and financial reasons, the performance of cardiac catheterization and coronary angiography on an outpatient basis has increased recently. The purpose of this paper is to state the guidelines of The Society for Cardiac Angiography and Interventions regarding the performance of outpatient catheterization in a hospital setting.© 1992 Wlley‐LIM, Inc.
Pressure wave fidelity in catheter introducers
Authors: Tock Christine L. , Hyman William A. 
Published: March 2007

AbstractPressure waveform fidelity was examined in two sizes of the Bard catheter introducer. The purpose of this endeavor was to determine whether accurate blood pressure measurements could be achieved directly via the catheter introducers. The introducers were incorporated into a mock circulatory system for the study. The effects of supporting dilators and catheters within the introducer sheath during pressure measurements were also considered. Parameters used to explain pressure waveform response within the catheter introducers included the damping coefficient and the natural frequency of the catheter introducer, and the effects of impedance mismatching between the transducer and the mock circulatory system. Overall, the pressure measurements obtained from the catheter introducer were distorted. Mean pressure levels measured in the introducers were up to 15 mmHg higher than the true mean pressure. The distortion in the pressure measurements can be attributed for the most part to impedance mismatching. In sum, the pressure measurements obtained from catheter introducer‐manometer systems should be used only referentially, and not as an absolute standard.
Clinical results and quality of life after percutaneous transluminal coronary angioplasty: A preliminary report
Authors: McKenna Kryss T. , McEniery Paul T. , Maas Frederick , Aroney Constantine N. , Bett John H. N. , Cameron James , Garrahy Paul , Holt Geoffrey , Hossack Kenneth F. , Murphy Allan L. 
Published: March 2007

AbstractTo evaluate the effect of percutaneous transluminal coronary angioplasty (PTCA) on quality of life, data on symptomatic status, functional capacity, life satisfaction, and psychological wellness were collected on 102 patients at 1 day pre‐PTCA and 2 months post‐PTCA, and on the first 50 of these patients at 10 months post‐PTCA. There were highly significant changes (p <0.001) in all quality of life measures between pre‐PTCA and the 1st follow‐up measurements. No further significant changes occurred in these measures between the 1st and 2nd follow‐up measurements, indicating that the initial improvement in quality of life was sustained over this period. Data on primary success rate, complications, and pre‐ and post‐PTCA risk factor scores are also reported.
Coronary artery aneurysm formation following directional coronary atherectomy
Authors: Krolick Merrill A. , Bugni William J. , Walsh John W. 
Published: March 2007

AbstractDirectional coronary atherectomy has recently become available to treat coronary stenosis by excision and removal of tissue. The optimal depth of resection by this method has not been determined and complications have occurred. This report describes the formation of a coronary aneurysm at an atherectomy site in an asymptomatic patient, a finding not reported previously.
Case report: Formation of vessel aneurysm after stand alone coronary excimer laser angioplasty
Authors: Preisack Melitta B. , Voelker Wolfram , Haase Karl K. , Karsch Karl R. 
Published: March 2007

AbstractFormation of aneurysms in coronary arteries can be observed following percutaneous transluminal balloon angioplasty but has not been reported previously after coronary excimer laser angioplasty in humans. Stand alone coronary excimer laser angioplasty was performed in a 49‐year‐old man with a 75% left anterior descending artery stenotic lesion and exertional angina, documenting a good angiographic result postintervention. Control angiography 6 months after the procedure revealed an aneurysm distal to a 90% restenosis in the area of ablation.
Aneurysmal formation after successful pulsed laser coronary angioplasty
Authors: Nakamura Fumitaka , Kvasnicka Jan , Decoster Hans L. , Geschwind Herbert J. 
Published: March 2007

AbstractWe report two cases of coronary artery aneurysmal formation as long term consequences of Ho: YAG and excimer laser coronary angioplasty. This case report suggests that pulsed laser angioplasty may result in severe vessel wall damage that may lead ultimately to aneurysmal formation.
Detachable balloon embolization of an latrogenic aortocoronary arteriovenous fistula combined with aortocoronary bypass PTCA: A case report
Authors: Peregrin J. H. , Želízko M. , Kováčc J. 
Published: March 2007

AbstractCoronary artery bypass surgery was performed in a 54‐year‐old male, and one of the grafts was inadvertently sutured to the vena cordis magna instead of to the left anterior descending coronary artery (LAD). Four years later the patient observed a progression of symptoms including episodes of angina pectoris at rest. Coronary angiography showed stenosis of one of the bypass grafts and notable dilatation of an iatrogenic arteriovenous (A‐V) fistula. The stenosed bypass graft was dilated and the A‐V fistula occluded by use of a detachable balloon. Embolization was performed rather than surgery, as the LAD was found to be a poor surgical target. The patient's symptoms improved after the procedure; he was followed for 18 months during which time his condition remained stable.
Combined PTCA and microcoil embolization of a left internal mammary artery graft
Authors: Mishkel G. J. , Willinsky R. 
Published: March 2007

AbstractInternal mammary arteries are increasingly common conduits for coronary revascularization. Although infrequent, cardiologists are faced with a number of technical failures. We describe a case of combined PTCA to a LIMA insertion stenosis, along with coil embolization of a large unligated intercostal side branch. A complication of embolization is described along with angiographic follow‐up.