Search Results
Results 251 - 300 of 700
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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 ...
Goldberg S L - - 1998
Radial artery access for coronary artery angioplasty is a cost-effective alternative to other vascular entry sites. The initial series of patients using the radial artery site for an operator without experience in using arm access for coronary artery angioplasty was evaluated. Clinical success was achieved via the radial artery in ...
Yamashita K - - 1998
Recruitable coronary collaterals may appear when spasm suddenly occludes the coronary artery. We report a patient with variant angina who had visible collateral vessels on a control coronary angiogram, despite the presence of normally appearing coronary arteries. These collaterals disappeared after intracoronary administration of nitroglycerin. These findings suggest that recruitable ...
Mohri M - - 1998
BACKGROUND: Microvascular angina can occur during exercise and at rest. Reduced vasodilator capacity of the coronary microvessels is implicated as a cause of angina during exercise, but the mechanism of angina at rest is not known. Our aim was to test the hypothesis that primary hyperconstriction (spasm) of coronary microvessels ...
Kindgen-Milles D - - 1998
A 73-year-old man without a history of coronary artery disease had two episodes of significant ST-segment elevation indicative of inferior myocardial ischemia during the resection of an abdominal aortic aneurysm. During the further course, sudden ST-segment elevations occurred and resolved spontaneously without preceding hemodynamic instability. The patient sustained two episodes ...
Shanoudy H - - 1998
Forced hyperventilation is simple, safe to perform, and can be used as a provocative test for coronary vasospasm. This study assesses whether a vasospastic component of angina might be detected in patients with angiographically "nonobstructive" coronary artery disease by posthyperventilation technetium-99m (Tc-99m) sestamibi single-photon emission computed tomography (SPECT) cardiac imaging. ...
Lekakis J P - - 1998
OBJECTIVES: We sought to determine endothelium-dependent vasodilator function in the brachial artery of patients with microvascular angina pectoris. BACKGROUND: Previous studies suggest the presence of endothelial dysfunction of the coronary microcirculation in patients with microvascular angina pectoris. It is not known whether endothelial dysfunction in these patients is a generalized ...
Yamagishi H - - 1998
A 55-year-old Japanese woman demonstrated ST-segment elevation in leads I, aVL, and V3-V6 with chest pain both in an ergometer exercise test and on dobutamine stress echocardiography. Although the baseline coronary arteriogram revealed no organic stenosis, total occlusion of the distal portion of the posterolateral branch of the left circumflex ...
Hung D Z - - 1998
A patient with coronary artery disease suffered an acute myocardial infarction temporally related to chewing a betel nut. Alkaloids in betel nut, such as arecoline, may play a contributing role in coronary artery spasm due to parasympathomimetic effects on vessels with abnormal endothelium. Chewing betel nuts may instantly induce a ...
Porta C - - 1998
Cardiotoxicity is an uncommon side-effect of 5-FU-based chemotherapy. Coronary artery vasospasms have been postulated to be involved in the pathogenesis of this rare but serious problem. We found high plasma levels of ET-1, a potent natural vasoconstrictor, in two patients who experienced two of the commonest clinical manifestations of 5-FU-induced ...
Nagatani T - - 1998
The authors describe a case of hemifacial spasm associated with Marfan's syndrome. A 24-year-old-woman suffered from left hemifacial spasm for 6 years. She had undergone surgical treatments for bilateral ectopia lentis and kyphoscoliosis in the second decade of life. She also had unusually long and slim limbs with arachnodactyly. Three-dimensional ...
Schweitzer W - - 1998
TMR (Transmyocardial Laserrevascularization) was performed on the partially dyskinetic left ventricular anterior wall with stenotic coronary blood supply in a 61 year old woman with a history of angina and myocardial infarction. As an ischemic aneurysm developed in the anteroapical region of the TMR treated area, it became clear that ...
Hendrickx J F - - 1998
Intraoperative coronary artery spasm (CAS) is rare, and most cases have been reported during cardiac surgery (4, 7, 12). The following is a case report of a patient undergoing liver resection developing CAS, resulting in well-documented ST-segment elevation in lead II and V5 of the electrocardiogram (ECG) and severe hemodynamic ...
Kim C B - - 1997
Transmyocardial revascularization (TMR) is a potential therapy for patients with severe angina pectoris and coronary anatomy deemed unsuitable for traditional revascularization techniques. Investigations of TMR are reviewed with emphasis on studies relevant to the development of a percutaneous, catheter-based transmyocardial revascularization procedure (PMR). The results of the preliminary animal studies ...
Yamashita K K Department of Neurosurgery, Osaka Red Cross Hospital; Osaka, - - 1997
There have never been functional studies in the diagnosis of hemifacial spasm caused by neurovascular compression. We used neurointerventional techniques to conduct a functional investigation of the artery responsible for hemifacial spasm in seven patients. A microcatheter was inserted into the various arteries of the posterior circulation under systemic heparinization, ...
Kugiyama K - - 1997
OBJECTIVES: This study sought to examine whether flow-dependent dilation is impaired at the site of coronary artery spasm in patients with coronary spastic angina. BACKGROUND: Physiologic stimuli such as exercise and exposure to cold have been shown to cause an increase in coronary blood flow, leading to flow-dependent dilation of ...
Platania N - - 1997
The case is reported of a 58 year-old man with left-sided trigeminal and glossopharyngeal neuralgia, left hemifacial spasm and arterial hypertension. Preoperative MRI angiography examination showed a massively ectatic left vertebral artery. At operation a multiple neurovascular compression, which is described, was discovered. Microvascular decompression was performed and postoperatively the ...
Jain U - - 1997
STUDY OBJECTIVES: To evaluate the automated determination of onset and offset times and amplitudes of all the PQRST waves from simultaneously recorded surface electrocardiogram (SECG) and unipolar esophageal ECG (EsECG). The occurrence of ST segment deviation is also examined. DESIGN: Prospective, observational study. SETTING: University hospital. PATIENTS: 30 patients undergoing ...
Lin Y J - - 1997
Previous studies have shown that propranolol, an effective mainstay for angina pectoris and unstable angina, can induce coronary arterial spasm in patients with variant angina. However, no report has yet associated it with painless Prinzmetal's ST elevation in patients without a history of variant angina. The present communication describes such ...
Matsubara T - - 1997
BACKGROUND: The clinical role of collateral vessels, which are transiently augmented during coronary artery spasm, remains controversial. OBJECTIVE: To examine the correlation between coronary arteriographic and electrocardiographic features during spasm in the left anterior descending artery (LAD). METHODS: We studied 45 patients in whom LAD spasms were induced by administration ...
Kordestani R K - - 1997
OBJECTIVE: The goals of the study were to determine the incidence and time course of cerebral arterial spasm in patients with penetrating craniocerebral gunshot wounds, to study the relationship between vasospasm and subarachnoid hemorrhage (SAH) in these patients, and to evaluate the effects of vasospasm on outcome. METHODS: Thirty-three patients ...
Kévorkian J P - - 1997
An eighteen-year-old woman with pseudoxanthoma elasticum (PXE) suffered from mild angina pectoris over a ten-year period. Severe triple-vessel disease with mild left ventricular dysfunction was demonstrated on angiography. No revascularization was feasible. Despite a reported high frequency of angina pectoris among patients with PXE, only 10 convincing reports have appeared ...
Kanda I - - 1997
The mechanism of coronary artery spasm has been hypothesized as follows: the dormant gene of the smooth muscle of the human coronary artery is identical or similar to the active gene of the smooth muscle of ductus arteriosus, but can be activated by estrogen. The activation could be preventable by ...
Flotats A - - 1997
A comparison was performed between technetium-99m tetrofosmin myocardial perfusion tomography at baseline and after nitrate administration, using a 2-day protocol, and rest-reinjection thallium-201 single-photon emission tomography (SPET) studies in order to assess whether nitrates enhance the detection of viable myocardium with 99mTc-tetrofosmin. Fifteen patients with coronary artery disease, previous myocardial ...
Valentine E G - - 1997
A 77-year-old man with a history significant only for coronary artery disease presented to the ED with left-arm pain, shortness of breath, nausea, and diaphoresis. Six hours after the patient's admission to the hospital for presumed unstable angina, fever and left arm swelling, associated with crepitus and violaceous bullae, developed. ...
Akar F - - 1997
AIMS: We studied the effectiveness of levcromakalim, a potassium channel opener (KCO), in the prevention and reversal of spasm in arterial grafts used in coronary artery bypass operations, namely, internal mammary artery (IMA) and gastroepiploic artery (GEA). METHODS: Spasm was mimicked in vitro in arterial rings from 109 patients by ...
Kayikçio─člu A - - 1997
Successful ear replantations are rare. The authors report a case in which 75 percent of the ear survived with an arterial anastomosis only. An extended period of time must be allowed for relief of arterial spasm in replants with tiny vessel diameters.
Kamiguchi H - - 1997
Hemifacial spasm can be caused by vascular compression of the facial nerve at the root exit zone from the brainstem. Several case reports suggest that narrowing of the cerebellopontine angle cistern caused by Paget's disease, abnormal elevation of the petrous bone caused by hyperplasia, or contralateral acoustic neurinoma may increase ...
Motoyama T - - 1997
Coronary spasm is induced by acetylcholine, serotonin, ergonovine, or histamine, all of which cause vasodilation when the endothelium is intact, and is promptly relieved by nitroglycerin, which vasodilates through the direct action on smooth muscle. Endothelial dysfunction is therefore possibly involved in the pathogenesis of coronary artery spasm. The aim ...
Stallworth J R - - 1997
This case documents acquired reversible cortical blindness as a complication of hypertension secondary to acute glomerulonephritis and emphasizes the importance of recognizing this complication in children. The etiology of the cortical blindness is felt to be secondary to ischemia with edema from arterial spasm. Results of a CT scan of ...
Yamashita K - - 1997
We used neurointerventional techniques to conduct a functional investigation of the artery responsible for hemifacial spasm in a 48-year-old woman. Insertion of a microcatheter into the posterior inferior cerebellar artery stopped the hemifacial spasm immediately and completely. The artery was verified intraoperatively as the vessel compressing the root exit zone ...
Chang Q - - 1997
OBJECTIVE: Our previous work showed that stress sensitized the vessels of cardiomyopathic hamsters (CMHs), but only hamsters in the lesion-forming period of their life. We hypothesized that we would find an interaction between stressor intensity and microvascular vulnerability. METHOD: Male CMHs at ages of 1.5, 2.5, and 3.5 months were ...
Yamagishi H - - 1997
A 66-year-old woman underwent elective cardiac catheterization for investigation of periodic attacks of chest pain at rest. During the examination, a chest pain attack occurred unexpectedly, resulting in ST elevation in the precordial leads on electrocardiography. Immediate coronary arteriography demonstrated no organic stenosis but markedly delayed contrast medium perfusion in ...
Iwase M - - 1996
We compared the effectiveness and practicability of dobutamine stress echocardiography (DSE) and treadmill exercise electrocardiographic testing (TMT) for detecting coronary artery disease. Ninety-six patients (mean age 58.8 +/- 9.0 years) who presented for coronary angiography underwent both DSE and symptom-limited TMT. Two-dimensional echocardiography was performed to detect ischemia-induced wall motion ...
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