Search Results
Results 251 - 300 of 733
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Miyao Y - - 2000
OBJECTIVES: The purpose of this study was to evaluate the extent of atherosclerotic changes in angiographically normal coronary arteries using intravascular ultrasound (IVUS) technique in patients with coronary spastic angina. BACKGROUND: Nitric oxide activity was shown to be decreased in coronary arteries of patients with coronary spastic angina (CSA). Decrease ...
Shaheen J - - 2000
Angina pectoris usually occurs in patients with significant coronary artery disease during periods of increased coronary demand such as increased heart rate. Bradycardia is a rare and unusal cause of angina pectoris that should be considered during the evaluation of patients with agnia. This paper reports three cases of bradycardia-induced ...
Anderson G B - - 2000
BACKGROUND AND PURPOSE: Digital subtraction angiography (DSA) is the standard of reference for detecting cerebral vasospasm after subarachnoid hemorrhage (SAH). CT angiography (CTA) is a relatively recent method for depicting the intracranial arterial vasculature. The purpose of this study was to compare CTA and DSA in the detection and quantification ...
Konstantinov I E - - 2000
Robert H. Goetz performed the first successful clinical coronary artery bypass operation on May 2, 1960. He used a nonsuture technique to connect the right internal thoracic artery to the coronary artery by means of a modified Payr's cannula made of tantalum. The patency of the anastomosis was demonstrated angiographically ...
Chan C L - - 2000
to describe an intraoperative technique using a Fogarty balloon to treat arterial spasm following vascular bypass and endarterectomy. prospective case control study. twenty-two patients following femorodistal bypass surgery and one patient following carotid endarterectomy, with arterial spasm in the distal run-off on completion angiography, were treated with Fogarty balloon dilatation. ...
Niccoli G - - 2000
We report the case of a 65-year-old woman who developed unstable angina 2 months after successful coronary angioplasty of the left anterior descending coronary artery. Coronary angiography failed to show angiographic restenosis, but intracoronary ergonovine caused ST segment elevation and her habitual chest pain in the absence of epicardial coronary ...
Boffa G M - - 2000
We describe the angiographic characteristics of coronary artery spasm observed in 12 out of 247 (4.9%) patients who underwent 808 coronary angiographies after heart transplantation. Coronary artery spasm was diagnosed when localized and reversible narrowing of the coronary lumen was identified. After coronary artery spasm identification all patients were followed-up ...
Katzenschlager R - - 2000
We report about a patient suffering from multiple spastic stenoses of varying degree of both iliac arteries and from occlusion of the left tibiofibular trunc. Laboratory investigations revealed increased levels of homocysteine and the diagnosis of homocystinuria was confirmed by fibroblast cell culture. The spasms responded well to vasodilative therapy ...
Wung S F - - 2000
By using our database of continuous 18-lead electrocardiographic (ECG) recordings (standard + V3-5R + V7-9) during coronary angioplasty, we selected 68 patients with left circumflex balloon occlusions (posterior ischemia model) or proximal right coronary artery balloon occlusions (right ventricular IRV] ischemia model). ST-segment amplitudes (J + 60 ms) at preangioplasty ...
Fujita H - - 2000
BACKGROUND: Dipyridamole is a vasodilator of resistance vessels and has no vasoconstrictive effect on large coronary arteries. HYPOTHESIS: The present study used dipyridamole thallium-201 (201Tl) scintigraphy to clarify the role of microvasculature in coronary flow limitation in patients with vasospastic angina and normal coronary arteries. METHODS: Sixteen patients underwent dipyridamole ...
Puc M M - - 2000
Transmyocardial laser revascularization (TMLR) has been widely evaluated for treatment of the ischemic myocardium either in conjunction with coronary artery bypass grafting or as sole therapy. Clinically, it has shown significant improvement for angina symptoms, but the mechanism by which this modality works is unknown at this time. The original ...
Shimada T - - 1999
BACKGROUND: Recently, several case reports have implicated vasospasm of small coronary arteries in vasospastic angina pectoris. Vasospasm of small coronary arteries was also considered from angiographic findings in patients with atypical chest pain. In Syrian hamster, vasospasm in small coronary arteries was considered to be the cause of dilated cardiomyopathy. ...
Fuster V - - 1999
In 110 patients with either stable or unstable angina, the morphology of coronary artery lesions was qualitatively assessed at angiography. Each obstruction reducing the luminal diameter of the vessel by 50% or greater was categorized into one of the following morphologic groups: concentric (symmetric narrowing); type I eccentric (asymmetric narrowing ...
Goto A - - 1999
A dilemma arises in patients with chest pain or other symptoms suggestive of coronary artery disease but without significant coronary artery stenosis or spasm even after the spasm provocation test by either ergonovine or acetylcholine. Incremental doses of intracoronary acetylcholine (up to 100 micrograms for left coronary artery and 50 ...
Hellstrom H R - - 1999
It is accepted that primary occlusions of epicardial arteries by thromboses, stenotic coronary artery disease (CAD), and spasm directly induce symptoms in ischemic heart disease (IHD). Because of this acceptance, there has been little interest in alternate mechanisms for IHD--as the spasm of resistance vessel (S-RV) concept of IHD, which ...
Kyoshima K - - 1999
OBJECTIVE: We describe an easy and useful method for treating hemifacial spasm related to the vertebral artery. METHODS: The technique entails the manufacture of a dural belt harvested from the cerebellar convexity dura and a dural bridge made at the petrous dura combined with the use of an aneurysm clip. ...
Lazarous D F - - 1999
OBJECTIVE: Angiogenic peptides like VEGF (vascular endothelial growth factor) and bFGF (basic fibroblast growth factor) have entered clinical trials for coronary artery disease. Attempts are being made to devise clinically relevant means of delivery and to effect site-specific delivery of these peptides to the cardiac tissue, in order to limit ...
Sakata K - - 1999
In patients with pseudoxanthoma elasticum, severe organic coronary artery stenosis often occurs without coronary risk factors. However, this report presents the case of a 49-year-old woman with pseudoxanthoma elasticum who had coronary artery spasm with an angiographically normal coronary artery. In addition, coronary artery spasm was provoked with dipyridamole thallium-201 ...
Haris K - - 1999
A method for extraction and labeling of the coronary arterial tree (CAT) using minimal user supervision in single-view angiograms is proposed. The CAT structural description (skeleton and borders) is produced, along with quantitative information for the artery dimensions and assignment of coded labels, based on a given coronary artery model ...
Gibson C M - - 1999
OBJECTIVES AND BACKGROUND: While attention has focused on coronary blood flow in the culprit artery in acute myocardia infarction (MI), flow in the nonculprit artery has not been studied widely, in part because it has been assumed to be normal. We hypothesized that slower flow in culprit arteries, larger territories ...
Yamagishi H - - 1999
A woman with coronary artery disease underwent a new imaging technique: dobutamine-stress electrocardiography (ECG)-gated tetrofosmin-single photon emission computed tomography (SPECT). Dobutamine-stress ECG-gated tetrofosmin-SPECT with automatic left ventricular function analysis software programs detected improvement and a biphasic response of dysfunctional myocardium during dobutamine infusion, which suggested viable but hibernating myocardium. Dobutamine-stress ...
Petropoulakis P N - - 1999
To investigate the concomitant coronary flow and hemodynamic changes induced by dobutamine and adenosine in the catheterization laboratory, we studied stenotic and adjacent normal coronary arteries in 20 patients using paired Doppler Flowires. Coronary flow velocity and hemodynamics were measured sequentially after intracoronary (ic) adenosine, during incremental iv dobutamine infusion, ...
Nii T - - 1999
We report two cases of ventricular fibrillation during noncardiac surgery. Although an emergency coronary angiogram showed no significant coronary stenosis, coronary artery spasm was induced by the intracoronary injection of acetylcholine. It is possible that ventricular fibrillation is caused by coronary artery spasm during noncardiac surgery in patients without overt ...
Kim P - - 1999
Alteration of sarcolemmal permeability was evaluated in the cerebral artery after subarachnoid hemorrhage. Significance of membrane dysfunction in the pathogenesis of chronic spasm and contribution of apoptosis were investigated in a canine model. Permeability of the smooth muscle cell (SMC) membrane was assessed by double staining with a hydrophilic (ethidium ...
La Vecchia L - - 1999
An extensive spontaneous right coronary artery dissection was the only abnormal angiographic finding detected in a 67-year-old man with chronic exercise-induced angina pectoris. The lesion was treated with multiple stenting with good angiographic results. The clinical implications of this finding and the details of the intervention performed are discussed in ...
Jessurun G A - - 1999
Patients with symptomatic small vessel coronary artery disease may be inadequate candidates for revascularization procedures. They may suffer from refractory angina, which does not respond to maximal anti-anginal drug therapy. In addition to patients with end stage coronary artery disease and syndrome X, this newly defined group of subjects with ...
Kulkarni N M - - 1999
Coronary spasm is a well-recognized observation during coronary angiography. This report describes a patient who developed spasm of a radial artery bypass graft during coronary intervention. There are many reports on the angiographic follow-up to confirm the surgical results for patency in radial arterial conduits. We share our experience with ...
Ergene O - - 1999
Catheter-induced vasospasm of small caliber arteries, such as the coronary arteries, is frequently observed during cardiac catheterization, but obstruction of the large caliber arteries has not previously been reported. Here we present two cases in which femoral and external iliac arteries were totally obstructed due to spasm during diagnostic coronary ...
Caputo M - - 1999
We report a case of a 62-year-old man with severe manifestations of postoperative coronary artery spasm following effective coronary artery bypass grafting. The coronary artery spasm was manifested by ST segment elevation, hypotension and wall motion abnormalities on echocardiography. Urgent angiography confirmed the diagnosis and intracoronary infusion of nitroglycerine and ...
Sganzerla P - - 1999
Prinzmetal variant angina due to epicardial coronary artery spasm is a disease usually treated with drug therapy with successful results. A case of variant angina, refractory to conventional pharmacological treatment, and complicated by coronary artery thrombosis, was treated with percutaneous transluminal coronary angioplasty and stenting with good immediate and late ...
Mehta A C - - 1999
Bronchoscopic manipulation of an endobronchial carcinoid can precipitate a carcinoid crisis. Coronary artery spasm is an uncommon manifestation of carcinoid crisis, and has never been reported as a complication of flexible bronchoscopy. We report a case of a 10-year-old girl who developed coronary artery spasm and cardiac arrest during neodymiumyttrium ...
Birnbaum Y - - 1999
This study assessed whether differences in the underlying mechanisms for various patterns of precordial ST-segment depression with inferior acute myocardial infarction (AMI) are associated with poorer prognoses. We studied 1,155 patients with inferior AMI who underwent thrombolysis in the Global Utilization of Streptokinase and TPA for Occluded arteries (GUSTO-I) angiographic ...
Futterman L G - - 1999
LMWH (enoxaparin) should be used in combination with aspirin in the early phase of non-Q wave MI and in patients with unstable angina. The benefit of LMWH in acute coronary syndromes has been validated in several clinical trials. In addition, the use of LMWH is cost-effective when compared with use ...
Meyer V E - - 1999
Arterial spasms developing during microsurgical vascular anastomoses can be a difficult problem. We have been using specially developed spherical dilators in clinical practice to remove spasm that do not respond to the application of warm saline with lidocain. Dilating the spastic segment of the vessel two or three times with ...
Ogawa H - - 1999
It has been suggested that active inflammation plays an important role in the pathogenesis of acute coronary syndromes, including unstable angina. Intracellular adhesion molecule-1 (ICAM-1) is a major ligand on the endothelial cells for adherence of the activated polymorphonuclear leukocytes. Recently, it has been demonstrated that the soluble form of ...
Ohmura H - - 1999
Recent study demonstrated high susceptibility of plasma LDL to lipid peroxidative modification in patients with variant angina. Oxidized stress state, especially oxidized LDL, may induce coronary artery spasm by its impairing effect of endothelium-dependent arterial relaxation, but precise mechanisms remain unclear. Study subjects included 93 patients who underwent coronary angiographic ...
Domínguez H - - 1999
We present a case of cerebral subarachnoid haemorrhage, with T-wave inversions and myocardial akinesia on echocardiography and ventriculography. Acute coronary angiography showed normal arteries. An aneurysm of the right middle cerebral artery was clamped. Echocardiogram was normalized. We discuss coronary spasm as the possible mechanism of myocardial stunning in subarachnoid ...
Stoll H P - - 1999
BACKGROUND AND HYPOTHESIS: Pharmacologic modulation of the contents of the pericardial space has been shown to influence the response of coronary arteries to balloon injury. Endoluminal (EL) local delivery of various drugs into coronaries has been found to be limited by short residence time, as well as by highly variable ...
Gupta S - - 1998
Pharmacological therapy remains the treatment of choice for Prinzmetal angina. We report an unconventional approach of coronary artery stenting to treat coronary artery spasm in variant angina refractory to triple drug therapy. Favorable clinical and angiographic results and a negative Ergonovine test, under less aggressive medical therapy, are valuable arguments ...
Bowles D K - - 1998
Exercise training produces numerous adaptations in the coronary circulation, including an increase in coronary tone, both in conduit and resistance arteries. On the basis of the importance of voltage-gated Ca2+ channels (VGCC) in regulation of vascular tone, we hypothesized that exercise training would increase VGCC current density in coronary smooth ...
Shaheen J - - 1998
BACKGROUND: The diagnostic value of 12-lead electrocardiography during dobutamine stress echocardiography (DSE) is not well documented. METHODS AND RESULTS: We reviewed the records of 116 patients referred for DSE and coronary angiography, 52 of whom were excluded because of abnormal ST segment or inadequate DSE. Of the analyzed 65 patients, ...
Kang S H - - 1998
To evaluate whether the flow-mediated vasodilation and coronary flow reserve are impaired or not in patients with vasospastic angina (VA), we measured the changes of epicardial coronary artery diameter and flow reserve in spasm related-left anterior descending coronary artery (LAD). The flow mediated-response of epicardial coronary arteries in 15 VA ...
Parmar M S - - 1998
Emotional stress is a recognized trigger for coronary artery spasm. An association between dreams and sudden death is described in folklore and medical history, and originates from the common experience of being awakened by vivid, frightening dreams, with racing pulse, cold sweats and other physiological responses associated with intense distress. ...
Ha J W - - 1998
BACKGROUND: It has been suggested that the sympathetic nervous system might play an important role in the development of coronary artery spasm. However, no cardiac imaging modality has been able to demonstrate abnormal sympathetic innervation in patients with coronary artery spasm. The purpose of this study was to assess the ...
Haddy S M - - 1998
We present a case of intramural hematoma initially misdiagnosed as angina, and requiring myocardial revascularization. Angiography failed to lead to the proper diagnosis and the original transesophageal echocardiogram was misinterpreted as showing an intimal flap that was actually an echocardiographic artifact. The echocardiographic characteristics and implications of this entity are ...
Okada M - - 1998
The number of patients with coronary artery disease has been increasing and several kinds of treatments have been performed to alleviate their conditions. In patients with small branches or diffuse stenotic lesions of the coronary arteries, on whom coronary artery bypass grafting and intracoronary intervention cannot be carried out, it ...
Kugiyama K - - 1998
OBJECTIVES: This study sought to examine effect of vitamin C, an antioxidant, on the abnormal vasomotor reactivity in spasm coronary arteries. BACKGROUND: Oxygen free radicals generated in the arterial walls have been shown to cause endothelial vasomotor dysfunction. METHODS: Responses of the epicardial arterial diameters of the left coronary arteries ...
Numata Y - - 1998
The aim of this study was to assess whether the psychobehavioral pattern alexithymia is related to coronary artery spasm. Alexithymia, deficient psychological awareness, was examined using the Minnesota Multiphasic Personality Inventory Alexithymia Scale in 100 patients with angina pectoris in whom coronary spasm, defined as > or = 99% coronary ...
Yamabe H - - 1998
This study was undertaken to assess the diagnostic value of resting 123I-BMIPP scintigraphy in patients with effort angina pectoris. One hundred and four patients underwent scintigraphic and angiographic examinations. The subsets of the patients were stable effort angina pectoris (stable type) in 27 cases, new onset of effort angina pectoris ...
Piquemal R - - 1998
A 34-year-old woman was hospitalized for severe acute arterial insufficiency of the limbs. Overuse of ergotamine derivative was acknowledged by the patient, who had a long history of migraine headaches. An arteriogram showed diffuse arterial spasm and occlusion of right leg distal arteries. Intravenous infusion of a stable prostacyclin analog ...
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