No abstract available.
Hyperplasia* ; Islets of Langerhans* ; Nesidioblastosis*

No abstract available.
Acidosis, Lactic*

No abstract available.
Pneumonia*

No abstract available.
Crohn Disease*

To substantiate the hypothesis that patients with antecedent angina(> or =24hr before myocardial infarcton) are more likely to have a significant residual stenosis than are those without antedecent angina, the coronary angiogram of 27 patients with successful coronary thrombolysis for acute myocardial infarction were reviewed. In comparison with the patients without antecedent angina the patient with antecedent angina had an increased mean stenosis (86.9% vs 69.3%) and had a more decreased ejection fraction(52.3% vs 65.6%). These findings suggest that angina pectoris before acute myocardial infarction would be regarded as one of high risk factors after acute myocardial infarction.
Angina Pectoris* ; Constriction, Pathologic* ; Humans ; Myocardial Infarction* ; Risk Factors

The use of advanced imaging techniques in computed tomography(CT) and magnetic resonance imaging (MRI) has established the appearance of most common liver neoplasms. There are, however, considerable overlaps In the appearances of various pathologic entities on CT and MRI, and certain hepatic lesions can show unusual characteristics that may lead to misinterpretation, so it is important for the radiologist to be aware of these uncommon appearances. The purpose of this article is to illustrate the spectra of uncommon patterns and various diagnostic pitfalls encountered on CT and MRI of liver neoplasms.
Liver Neoplasms* ; Liver* ; Magnetic Resonance Imaging*

PURPOSE: To compare the usefulness of echo-planar imaging (EPI) and fast spin-echo (FSE) in routine brain MR imaging. MATERIALS AND METHODS: Twenty-five patients with various intracranial diseases were prospectively examined with T2-weighted MR imaging on a 1.5T unit using FSE, spin echo singl-shot EPI (SS-EPI) and multi-shot EPI (MS-EPI) techniques. For qualitative assessment, overall image quality, discrimination between cortical gray-white matter and between basal ganglia-white matter, lesion conspicuity, image distortion and artifacts (motion, ghost, flow, and susceptibility) were all evaluated using a subjective scoring system ranging from 1 to 4 (1 for the worst and 4 for the best). For quantitative assessment, contrast and contrast-to-noise ratio (CNR) were calculated for cortical gray-white matter, basal ganglia-white matter, and lesion-white matter. RESULTS: Overall image quality, discrimination between cortical gray-white matter, basal ganglia-white matter, and lesion-white matter, lesion conspicuity, image distortion and susceptibility artifacts showed the highest value in FSE and the lowest in SS-EPI. Motion artifacts were seen only in FSE, while flow and ghost artifacts were most commonly seen in SS-EPI. Contrast and CNR of anatomical and pathologic structures showed the highest value in FSE, especially for cortical gray-white matter and basal ganglia-white matter . CONCLUSION: With regard to overall image quality, image distortion, susceptibility artifacts, contrast and CNR, EPI is far inferior to FSE. In routine brain MR imaging., the usefulness of EPI techniques would therefore be very limited.
Artifacts ; Brain* ; Discrimination (Psychology) ; Echo-Planar Imaging ; Humans ; Magnetic Resonance Imaging* ; Prospective Studies

We performed radionuclide ventriculography before and within 1 week after percutaneous mirtal valvuloplasty(PMV) to evaluate left ventricular(LV) function in 20 patients(3 males and 17 females, mean age of 38±10 years) who were pure mitral stenosis before PMV and less than grade 1 mitral regurgitation developed after PMV. 9 out of 20 patients had atrial fibrillation and 3 patients developed a small left-to-right shunt(Qp/Qs<1.5)after PMV using double-balloon technique resulted in a increase in mitral valve area(0.9±0.3 to 2.1±0.8mm
Atrial Fibrillation ; Cardiac Output ; Female ; Humans ; Male ; Mitral Valve ; Mitral Valve Insufficiency ; Mitral Valve Stenosis* ; Radionuclide Ventriculography ; Stroke Volume

The patency of graft vessels and their effects on the native coronary circulation were studied by evaluation of 78 graft sites in 35 patients who underwent selective bypass graft angiography among 152 CABG cases at a mean follow-up 12.6 month. The result were as follows ; 1) The overall graft patency rate was 70.5% : 73.8% for left anterior descending artery, 68.4% for left circumflex arterty, 64.7% for right coronary artery. 2) The patency rate of internal mammary artery was 77.8%. 3) In twenty eight patients who underwent native coronary angiography, twelve pateints showed progression of coronary artery disease in grafted vessel and two patients showed progression of coronary artery disease in non-grafted vessel. 4) The treadmill test was performed before and after coronary artery bypass graft in thirteen patients. Among 13 patients, nine patinets showed improved exercise tolerance. 5) The percutaneous transluminal coronary angioplasty were successfully performed for dilating three cases of stenotic vein graft and two cases of left main lesions after CABG and one case of stenotic left internal mammary artery graft.
Angiography ; Angioplasty, Balloon, Coronary ; Arteries ; Coronary Angiography ; Coronary Artery Bypass* ; Coronary Artery Disease ; Coronary Circulation ; Coronary Vessels* ; Exercise Test ; Exercise Tolerance ; Follow-Up Studies ; Humans ; Mammary Arteries ; Transplants ; Veins

PURPOSE: The purpose of this study was to evaluate the characteristic MR findings of intramedullary spinal cord tumors according to histologic diagnosis. MATERIALS AND METHODS: MR images of 34 patients with surgically-proven intramedullary spinal cord tumor were retrospectively reviewed. Histologic diagnosis revealed 15 ependymomas, ten astrocytomas, three hemangioblastomas, two oligidendrogliomas, one malignant schwannoma, one glioblastoma multiforme, one neuroblastoma and one ganglioglioma. MR images were analyzed for location, size, shape, signal intensity, and degree and pattern of contrast enhancement of the tumors. RESULTS: All tumors showed cord expansion and a varying extent of involvement ranging from 1.5 to 30cm. Variable degrees of contrast enhancement were seen in all cases. Cervical, cervico-thoracic, thoracic, and thoraco-lumbar spinal ependymomas accounted for three, two, six, and four cases, respectively, while four, two, and four cases of cervical, cervico-thoracic, and thoracic spinal astrocytomas respectively, were seen. Other tumors were located most commonly in the thoracic spinal cord. A sharply-defined tumor margin was seen in 13 of 15 ependymomas, in all three hemangioblastomas, one neuroblastoma and one ganglioglioma. Tumors usually showed slightly low- or iso-signal intensity on T1-weighted images and high signal intensity on T2-weighted images. Peritumoral cysts were seen in nine ependymomas, one hemangioblastoma, and one astrocytoma, while peritumoral hemorrhage was seen only in three ependymomas. Relatively homogeneous enhancement was seen in nine of 13 ependymomas, all hemangioblastomas and one neuroblastoma. All ten astrocytomas showed a poorly defined tumor margin and heterogeneous enhancement. CONCLUSION: On the basis of characteristic MR findings, intramedullary cord tumors may be histopathologically diagnosed.
Astrocytoma ; Diagnosis ; Ependymoma ; Ganglioglioma ; Glioblastoma ; Hemangioblastoma ; Hemorrhage ; Humans ; Magnetic Resonance Imaging* ; Neurilemmoma ; Neuroblastoma ; Retrospective Studies ; Spinal Cord Neoplasms ; Spinal Cord*