bluuebunny/crossref_metadata_2025_split huggingface dataset:
Combined cardiac catheterization and carotid cineangiography: An analysis of complications
Authors: Kramer John R. , Abi‐Mansur Pierre S. , Goormastic Marlene , Phillips Daniel F. 
Published: March 2007

AbstractTwo hundred fifty‐three patients underwent cardiac catheterization with selective cineangiography of the carotid arteries. Diagnostic angiograms of both the right and left carotid arteries were obtained in 240 patients (95%). Of these, 217 patients (90%) were studied without complication, 18 (8%) had minor complications, and five (2%) had major complications. Four of the five major complications occurred in patients with bilateral carotid atherosclerosis obliterans. Variations of catheterization technique used in an effort to reduce risk are discussed.
Percutaneous angioplasty of internal mammary artery graft stenosis: Case report and discussion
Authors: Zaidi Adnan R. , Hollman Jay L. 
Published: March 2007

AbstractPercutaneous transluminal coronary angioplasty (PTCA) was successfully used for the first time in 1977. With experience, its application broadened to include multiple lesions, complex anatomical stenoses, multiple vessels, and saphenous vein aortocoronary bypass grafts. This case demonstrates successful internal mammary graft angioplasty with continued long‐term (eight months) success, documented angiographically.
A new femoral bypass graft catheter
Authors: Simmons Charles R. , Willis William H. 
Published: March 2007

AbstractA three‐dimensional left coronary bypass graft catheter with a sidewinder configuration is described. It is best suited for superior origins of left coronary bypass grafts. This graft catheter has been used successfully from the femoral route in more than 620 patients without serious complications. The method for using this catheter from the femoral route is described.
New principles for optimum left ventriculography
Authors: Hildner Frank J. , Furst Ariel , Krieger Richard , Chengot Matthew , Javier Roger P. , Tolentino Alfonso O. , Samet Philip 
Published: March 2007

AbstractLeft ventriculography has become the single most important procedure in the evaluation of cardiac function. This study reevaluated the refinements of catheter and power injector technology to assess recommendations of past years and establish new principles for optimum ventriculography. Ventriculograms from 102 patients undergoing left heart catheterization and coronary arteriography for coronary, valvular, and myocardial heart disease served as the test sample. Three styles of #7F high‐flow 110‐cm pigtail catheters were utilized. One had 12 sideholes while the other two had six sideholes positioned nearer the base of the curl. Analysis of ventriculographic quality of each angiogram was performed by three of the authors independently and subsequently together. Five variables were analyzed for their effect on the diagnostic quality of the angiogram: (1) 6‐hole catheters, (2) 12‐hole catheters, (3) volume of contrast, (4) flow rate, and (5) location of injection. Once these analyses were complete, the effect of combinations of these variables was tested to determine their effect on angiographic quality. The first combination included contrast volume and flow rate. The second combination compared contrast volume and flow rate when utilized with 6‐ or 12‐hole catheters. The third combination tested the 6‐ and 12‐hole catheters in the apex or inflow locations. A multivariate contingency analysis was used to define relationships between the variables and the quality of the angiogram obtained.As independent variables, catheter style, volume of contrast, flow rate, and location of injection did not influence angiographic quality. However, the apex as a location of injection was the single most consistently important determinant of ventricular angiographic quality. Combination variables of contrast volume and flow rate did not affect angiographic quality. But when these were tested using 6‐ and 12‐hole catheters, high volume and low flow through a 6‐hole catheter achieved a result significantly better than all other combinations. Low flow rates were superior to high flow in nearly all combinations tested. The combination of 6‐hole catheter in the apex was substantially better than the 12‐‐hole in the inflow tract or any of the four other combinations. When total volume of contrast must be limited because of ventricular dysfunction, valvular heart disease, or renal disease, injection of relatively small amounts of contrast using low flow rates through a 6‐hole catheter positioned deep in the ventricle should permit a safe study to be diagnostically superior.
Myocardial preservation with alternate coronary artery occlusion and reversal of flow through collateral vessels
Authors: Thomas James D. , Gundel Walter D. 
Published: March 2007

AbstractIn 1980, a 46‐year‐old man suffered occlusion of his left anterior descending coronary artery with preservation of myocardium due to collateral flow from a patent right coronary artery. Six years later, unstable angina recurred, this time due to right coronary occlusion but with myocardial preservation due to reversal of collateral flow from his now recanalized left anterior descending artery.
Multiple vessel coronary angioplasty: Classification, results, and patterns of restenosis in 494 consecutive patients
Authors: Myler Richard K. , Topol Eric J. , Shaw Richard E. , Stertzer Simon H. , Clark David A. , Fishman Jodi , Murphy Mary C. 
Published: March 2007

AbstractWe report the immediate results and 6 month follow‐up data of 494 consecutive patients who underwent coronary angioplasty in two or more major epicardial arteries. Clinical success was achieved in 95% of the 494 patients. The technical success rate for the 1,117 vessels dilated was 89%, defined as at least a 35% reduction (mean = 53%) of the initial percent diameter stenosis and a decrease in the transstenotic gradient to ≤15 mmHg (mean = 9 mmHg). Complications of the procedure included emergency bypass surgery (2.8%), myocardial infarction (3.0%), and hospital death (0.4%) inclusive. At least one of these complications (major cardiac event) occurred in 3.8% of patients. Prior to angioplasty, 46% of patients were in Canadian Cardiovascular Society Class II, 42% in Class III, and 12% in Class IV. Follow‐up clinical evaluation (mean follow‐up period of 16.9 months) showed 83% of patients in Class I, 14% in Class II, and 3% in Class III. Of the 286 successful patients who have reached 6 month follow‐up plateau (mean follow‐up period of 20.5 months), 164 (57%) have so far had repeat coronary angiography and exhibited three different patterns: all lesions patent (N = 54), some lesions restenosed (N = 60), and all lesions restenosed (N = 32). There were 18 patients with new vessel lesions (not previously dilated). Logistic regression analyses demonstrated that clinical factors including diabetes (P <.05), hypercholesterolemia, (P <.01), new onset angina (P <.05), current smoking (P <.01), and morphologic and technical factors such as preangioplasty diameter stenosis > 95% (P <.05) and higher balloon inflation pressure (P <.05) were predictive of increased risk of recurrence. Patients were classified into two groups based on the anatomy of the target lesions. In Group A (N = 217), patients had a single lesion in each of the vessels to be dilated; Group B (N = 277) patients had a complex lesion in at least one of the vessels dilated. Group B patients were more likely to develop recurrence (P <.05). Of the original 494 patients, 488 (99%) are alive. Coronary angioplasty (either initially or with repeat PTCA) has been the definitive treatment in 453 of the 494 patients for an overall success of 92%. Thus multiple vessel coronary agioplasty can be performed effectively with a high angioplasty success rate and relatively low complication rate and excellent clinical prognosis. Patterns of restenosis appear to be related to clinical, morphologic, and technical factors.
Visualisation of left atrial thrombi by coronary arteriography
Authors: Hubbard W. N. , Hine A. L. , Rubens M. , Donaldson R. M. 
Published: March 2007

AbstractAbnormal vascularity in the region of the left atrial appendage was demonstrated by coronary arteriography in 5 patients with mitral stenosis. Subsequently, three of these patients proceeded to operation, and left atrial thrombi were confirmed in all three cases. Neovascularity must be differentiated from congenital fistulae, tumours, and coronary artery disease. Thrombus in the left atrial appendage is difficult to diagnose even with the use of cross‐sectional echocardiography and may occasionally be demonstrated by coronary arteriography.
Myocardial damage following coronary air embolism during coronary angiography
Authors: Amar Ronnie , Halon David A. , Lewis Basil S. 
Published: March 2007

AbstractCoronary air embolism may go unnoticed or cause chest pain, electrocardiogram changes, and myocardial damage; it may mimic coronary spasm [1,2]. We report a patient who sustained subendocardial myocardial infarction following intracoronary injection of air.
Clinical implication of inadvertent monitoring of pulmonary artery pressure via a “left atrial” catheter
Authors: Molajo Mrcp Adeniyi O. , Remington Shirley R. , Thomas William F. , Deiraniya Abdul K. 
Published: March 2007

AbstractA patient is described in whom a left atrial catheter was inadvertently wedged in a pulmonary vein following mitral valve replacement. The pulmonary vein wedge pressure obtained approximated the pulmonary artery pressure and was suggestive of paraprosthetic mitral valve regurgitation.
Snare loop technique for removal of broken steerable PTCA wire
Authors: Watson Linley E. 
Published: March 2007

AbstractTwo cases are described of percutaneous removel of trapped, broken steerable PTCA guidewire. One case described breakage of a guidewire inside the ascending aorta leaving a free end, which is retrieved using the snare loop technique. The second case described retrieval of an intact yet unwound wire through the guiding catheter using a snare loop wire.
Spontaneous dissection of the left anterior descending coronary artery in a male with survival
Authors: Vacek James L. , Phelix Joan , Dunn Marvin 
Published: March 2007

AbstractSpontaneous coronary artery dissection is a rare event, felt to be caused by intimal disruption and formation of a false lumen in the vessel wall. Compression of the true lumen by intramural hematoma may result in obstruction to blood flow, myocardial ischemia, infarction, and ultimately, death. We report the first instance (to our knowledge) of survival in a man with spontaneous dissection of the left anterior descending coronary artery.
Angiographic visualization of a right gastroepiploic artery‐left circumflex coronary artery graft
Authors: Black A. J. R. , Gibbons F. 
Published: March 2007

AbstractA 41‐year‐old man who underwent coronary artery bypass grafting using a gastroepiploic artery graft to the left circumflex coronary artery is reported. Subselective angiography of the right gastroepiploic artery using a steerable guidewire and coaxial catheter system is described.
Coronary artery aneurysm formation following PTCA
Authors: Weston Mark W. , Bowerman Richard E. 
Published: March 2007

AbstractSince its introduction in 1977, the number of procedures and indications for PTCA have grown. With this more frequent and broader use, new complications have been reported. This report describes the formation of a new coronary artery aneurysm at the PTCA site following dilatation. The pathogenesis of aneurysmal formation following PTCA is unknown.
Comparison of the performance of superflow (5F) and conventional 8F catheter for cardiac catheterization by the femoral route
Authors: Molajo Adeniyi O. , Ward Christopher , Bray C. L. , Dobson David 
Published: March 2007

AbstractIn order to determine whether the use of a smaller catheter would allow day‐case cardiac catheterization by the femoral route, the performance of the Superflow (5F) and the 8F catheters was compared in 34 adults who underwent left ventriculography and coronary angiography. As shown by the significantly lower fluoroscopy time [2.8 ± 1.2 min vs 4.5 ± 2.7 min, (m ± SD), p = 0.027] the 8F catheter was more maneuverable than the Superflow (5F) catheter. Poor left ventriculograms were obtained in a higher proportion of patients in whom the Superflow (5F) catheter was used. There was no significant difference in the time to achieve hemostasis at the puncture site in the two groups of patients (13 ± 5 min vs 10 ± 3 min, p = 0.09). It is concluded that the use of the Superflow (5F) catheter confers no advantage, while it is associated with longer screening time and poorer left ventriculograms.
Left main coronary artery embolism: A case report
Authors: Maddoux Gerry L. , Goss Jerome E. , Ramo Barry W. , Raff Gilbert L. , Heuser Richard R. , Shadoff Neal , Wilson John N. , Deane William M. , Hoyt Thomas W. , Fowler Burt N. , Gerety Richard L. , Hoffman Aaron Ronald 
Published: March 2007

AbstractA 27‐year‐old man had recurrent myocardial infarction found to be due to coronary embolism to the left main coronary artery with downstream embolization. The presumed etiology of thromboembolism was idiopathic cardiomyopathy. A unique method of treatment with Fogarty catheter retrieval was used.
Coronary arteriographic findings in cocaine abuse‐induced myocardial infarction
Authors: Hadjimiltiades Stavros , Covalesky Veronica , Manno Bruno V. , Haaz William S. , Mintz Gary S. 
Published: March 2007

AbstractA 31‐year‐old black man was admitted with an acute anterior myocardial infarction 20 minutes after IV cocaine abuse. Cardiac catheterization showed a totally occluded left anterior descending artery. Intracoronary and intravenous streptokinase resulted in thrombolysis: repeat angiography showed a normal anterior descending.
Hemodynamic and cardiac metabolic changes during nicardipine‐induced myocardial ischemia
Authors: Thomassen Anne R. , Bagger Jens P. , Nielsen Torsten T. 
Published: March 2007

AbstractAfter 10 mg nicardipine IV a patient with stable angina developed chest pain and ST‐segment depression accompanied by excessive tachycardia, low arterial blood pressure, and initially decreased coronary sinus blood flow. Measurements of arterial concentrations and cardiac exchanges of lactate, glucose, free fatty acids, glutamate, and alanine showed alterations indicative of severe ischemia.
Percutaneous transluminal angioplasty of a surgically obstructed left internal mammary artery graft
Authors: Klein Allan L. , Marquis Jean‐Francois , Higginson Lyall A. J. 
Published: March 2007

AbstractWe describe a case of an angioplasty of left internal mammary artery. This case had had a recent surgery and was found to have a stenosis at the site of a surgical clip. This was successfully dilated, and the patient became asymptomatic. Follow‐up at one year revealed continual improvement.
Coronary angioplasty at the time of initial diagnostic coronary angiography in patients with unstable angina
Authors: Haraphongse Mant , Tymchak Wayne , Rossall Richard E. 
Published: March 2007

AbstractOf the last 200 consecutive patients undergoing PTCA procedures at our institution, 29 (15%) had unstable angina; and angioplasty was performed at the time of diagnostic coronary arteriography. There were 26 males and three females with an age range of 31–82 (mean 57) years. Factors favoring PTCA at the time of initial coronary arteriography included clinical indications for revascularization, appropriate anatomy based on high‐quality fluoroscopy, and availability of emergency surgery if required. Of 34 coronary lesions in 29 patients, 19 involved the anterior branch of the left anterior descending coronary artery (LAD), eight the circumflex branch (Cx); and seven the right coronary artery (RCA). Five patients had two vessels dilated (one LAD + RCA, two LAD + Cx, and two RCA + Cx). Of the coronary artery lesions, 19 were concentric, seven were eccentric, 20 were single and discrete, six were long or multiple in the same vessel; eight vessels were totally occluded, and in nine patients there was good collateral circulation. Twenty‐nine (85%) arteries were successfully dilated. Of the unsuccessful cases, one was from failure to cross a totally occluded lesion, and three residual lesions and/or postdilatation pressure gradients remained significant. One patient required emergency aortocoronary bypass surgery because of total occlusion of the LAD immediately post‐PTCA. There were no postprocedural myocardial infarcts or deaths. It is concluded that, in selected patients with unstable angina, PTCA can be performed successfully and with low risk at the time of initial diagnostic coronary arteriography. This approach offers certain clinical financial advantages.
Successful combined percutaneous aortic balloon valvuloplasty and coronary angioplasty in two critically III patients
Authors: Hays Leonard J. , Tedesco Christine L. , Leatherman George F. , Smucker Mark L. 
Published: March 2007

AbstractThis report describes combined aortic balloon valvuloplasty and coronary angioplasty in two critically ill patients with aortic stenosis and coronary artery disease.
Systolic expansion of the aortic root: An echocardiographic and angiographic sign of aortic composite graft dehiscence
Authors: Josephson Richard A. , Singer Igor , Levine Joseph H. , Maughan Lowell , Pyeritz Reed E. , Gott Vincent L. , Weisman Harlan F. , Brinker Jeffrey 
Published: March 2007

AbstractPrecise diagnosis of aortic composite graft dehiscence may be difficult. We present a case illustrating this problem and its resolution. Two‐dimensional echocardiography and contrast ventriculography revealed a space adjacent to the aortic valve conduit that demonstrated marked systolic expansion. The dynamic variation of this space was secondary to communication with the left ventricular cavity caused by disruption of the composite graft valve ring. Thus, systolic expansion of the aortic root is a useful echocardiographic and angiographic sign of composite graft dehiscence.
Angiographic recognition of coronary ostial stenosis in nonspecific aorto‐arteritis
Authors: Kaul U. , Reddy K. S. , Narula Jagat , Nath C. S. , Mukhopadhyaya S. , Rajani M. , Bhatia M. L. 
Published: March 2007

AbstractA 17‐year‐old girl was seen with acute anterior myocardial infarction resulting in congestive heart failure. Clinical examination followed by detailed investigation revealed diffuse nonspecific aorto‐arteritis, with left coronary ostial stenosis, which is a very rare association. The relevant literature is reviewed.
Single coronary artery: Right coronary artery originating from distal left circumflex
Authors: Sheth Mukesh , Dovnarsky Michael , Cha Se Do , Kini Panambur , Maranhao Vladir 
Published: March 2007

AbstractThis report describes a patient with single coronary artery, in whom the right coronary artery originated from the distal left circumflex. However, this anomaly was not of clinical significance based on atypical nature of chest pain, negative thallium exercise test and absence of coronary obstruction.
Assessment of aortic pressure‐volume relationships with an impedance catheter
Authors: Ferguson James J. , Miller Michael J. , Ba Peter Sahagian, , Aroesty Julian M. , Mckay Raymond G. 
Published: March 2007

AbstractVolume measurements obtained with an impedance catheter (impedance volume measurements) have been used previously in determining pressure‐volume relationships in the right and left ventricles and in the right atrium. The purpose of the present study was to determine the utility of impedance volume techniques in the assessment of aortic pressure‐volume relationships in animals and humans. Experiments to develop this methodology were first performed in ten anesthetized dogs, with simultaneous measurements of aortic pressure (micromanometer), diameter (ultrasonic crystals), and impedance volume. Transient (20 sec) inferior vena cava (IVC) occlusion and nitroprusside infusion resulted in a reproducible series of aortic pressure‐volume and pressure‐diameter points. In each case changes in impedance volume closely paralleled changes in diameter. From the wide range of pressure‐volume points, it was possible to construct pressure‐volume plots for a single cardiac cycle, as well as longer loops over a 20–40 mm Hg pressure range. End‐systolic and end‐diastolic pressure‐volume points could subsequently be identified, which outlined a more precise pressure‐volume relationship that was linear in six cases and curvilinear in four cases, depending on the level of aortic pressure.We extended these techniques to human subjects undergoing diagnostic cardiac catheterization. Studies using the impedance catheter in the aorta were performed in 11 patients. Aortic pressure‐volume curves were elicited during Valsalva maneuver to obtain data over a range wider than that of a single cardiac cycle. Measurements of relative volume were calibrated with simultaneous M‐mode echocardiography in three patientsWe conclude that pressure‐volume relationships in the aorta can be assessed with impedance volume techniques, making possible in vivo measurements of arterial compliance. Potential nonlinearities in aortic P‐V relationships requrie that the assessment of aortic compliance encompass as much as possible of the physiologic range of pressure and volume.
Value and limitations of intracoronary adenosine for the assessment of coronary flow reserve
Authors: Zijlstra F. , Juilli Md Y. Ère , Serruys P. W. , Roelandt J. R. T. C. 
Published: March 2007

AbstractAn ideal coronary vasodilator for studying coronary flow reserve should rapidly produce a maximal hyperemic response, be short acting to permit repeated measurements, and not alter systemic hemodynamics. We measured with a Doppler tip balloon catheter, in 12 patients before and/or after percutaneous transluminal coronary angioplasty the hyperemic response following 12.5 mg intracoronary papaverine and following gradually incremental bolus injections of intracoronary adenosine, starting from 0.05 mg until a maximal hyperemic response or side effects. The mean dose (±SD) of adenosine needed to produce maximal hyperemia was 0.23 (±0.20 mg). Coronary blood flow velocity after adenosine increased to 1.6 ± 0.3 times resting coronary blood flow velocity, comparable in magnitude to the hyperemia following intracoronary papaverine. The time from injection to peak effect after adenosine was 7.4 (SD ± 2.2) sec and after papaverine 26 (SD ± 7) sec. Adenosine resulted in a bradyarrythmia in three patients. Intracoronary adenosine is a potent and very short acting vasodilator for studying coronary flow reserve, but the side effects and unpredictability of the dosage needed to produce maximal hyperemia may limit its applicability.