Left Radionuclide Imaging
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Considerations about the influence of upper arms positioning on myocardial perfusion scintigraphy results / Considerações referentes à influência do posicionamento dos membros superiores sobre o resultado da cintilografia de perfusão do miocárdio
Contrary to the advances in imaging technology for nuclear cardiology applications, we keep using the same often uncomfortable and sometimes impracticable patient position- supine with arms raised above the head (C). We tested another position modality: supine with arms down at the sides of the trunk (T). The purpose of this study was to verify if the functi
Publicado em: 2008
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2. Prognostic value of non-invasive functional tests during the follow-up of acute myocardial infarction treated with primary coronary stenting / Valor prognóstico de provas funcionais na evolução tardia de pacientes com infarto agudo do miocárdio tratados com angioplastia coronária transluminal percutânea primária com implante de stent
Primary coronary angioplasty and stenting during acute myocardial infarction is the first treatment choice. Non-invasive testings have been used in the diagnosis of restenosis but its efficacy and time to be performed have to be determined. The purpose of this study was to evaluate exercise treadmill test, myocardial perfusion imaging and rest two-dimensiona
Publicado em: 2007
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3. Contributions of perfusion and myocardic cintilography function with double isotope and low dobutamina dose validity: evaluation of cellular integrity and contractile reserve in viable myocardium identification / Contribuições da cintilografia de perfusão e função miocárdica com duplo isótopo na vigência de baixa dose de dobutamina: avaliação da integridade celular e reserva contrátil na identificação do miocárdio viável
Em pacientes portadores de insuficiência coronariana com prognóstico desfavorável pela presença de disfunção ventricular significativa, a pesquisa de viabilidade miocárdica traz contribuições ao predizer a possibilidade de recuperação contrátil após revascularização. Os segmentos miocárdicos com disfunção contrátil por hipoperfusão podem
Publicado em: 2007
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4. Assessment of left ventricular performance and myocardial viability using quantitative radioisotope techniques.
The diagnostic value of a combined radionuclide technique was compared with conventional angiocardiographic techniques in 60 patients with coronary artery disease. Quantitative 201Tl myocardial imaging combined with radionuclide angiocardiography using 99mTc-HSA provided a safe and accurate method for the assessment of left ventricular performance. The defec
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5. Cardiac tumours: non-invasive detection and assessment by gated cardiac blood pool radionuclide imaging.
Four patients with cardiac tumours were investigated by gated cardiac blood pool radionuclide imaging and echocardiography. Contrast angiocardiography was performed in three of the cases. Two left atrial tumours were detected by all three techniques. In one of these cases echocardiography alone showed additional mitral valve stenosis, but isotope imaging ind
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6. Magnetic resonance assessment of aortic and mitral regurgitation.
Magnetic resonance imaging provides an accurate method for the measurement of left and right ventricular volume. The ratio of left ventricular stroke volume to right ventricular stroke volume was calculated from contiguous transverse magnetic resonance images and was used to measure the severity of regurgitation in 18 patients with aortic regurgitation and 1
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7. Comparison of Two-Dimensional Echocardiography, Radionuclide Ventriculography and Cineangiography in Detecting Surgically Documented Left Ventricular Thrombi
To assess the diagnostic value of various imaging techniques for identifying left ventricular thrombi, we studied 35 patients who underwent left ventricular aneurysm repair and inspection of the ventricular cavity for the presence of a thrombus. All patients underwent preoperative two-dimensional echocardiography and left ventricular cineangiography; radionu
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8. Temporal evolution of changes in left ventricular function induced by cold pressor stimulation. An assessment with radionuclide angiography and gold 195m.
The evolutionary changes in left ventricular function induced by cold pressor stimulation were investigated at 90 second intervals by rapid sequential first pass radionuclide angiography using the short half life tracer gold 195m. The results in 12 subjects with normal coronary arteries were compared with those in 12 patients with coronary artery disease. Le
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9. Pulmonary perfusion imaging applied to prediction of pulmonary vascular pressures in mitral and aortic valve disease.
Radionuclide lung perfusion imaging was performed on 27 patients with valvular disease of the left heart. The ratio of upper to total counts for the lungs, determined by computer, was correlated against pulmonary vascular mean pressures. A close correlation (r = 0.91) was obtained against pulmonary wedge pressure. After corrective cardiac surgery upper/total
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10. Phasic abnormalities of left ventricular emptying in coronary artery disease.
Seventy subjects with suspected coronary artery disease were studied by radionuclide angiocardiography. Delayed or paradoxically emptying regions of the left ventricle were detected by a relatively new nuclear technique--phase imaging. The results were assessed in the light of cardiac catheterisation findings. Compared with 19 normals, regions with abnormall
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11. Assessment of the right ventricle by magnetic resonance imaging in chronic obstructive lung disease.
Right ventricular wall and chamber volume were measured by magnetic resonance imaging in 16 patients with stable chronic obstructive lung disease who subsequently underwent measurement of pulmonary haemodynamics by right heart catheterisation. The patients had a forced expiratory volume in one second of 0.7 (SD 0.3) litres, a forced vital capacity of 2.4 (1.
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12. The ST segment of the ambulatory electrocardiogram in a normal population.
The behaviour of the ST segment in everyday life was studied by ambulatory electrocardiography in 111 normal volunteers. Fifteen were excluded because of abnormal exercise responses (10 subjects) and significant postural ST segment shifts (five subjects). This left 62 men and 34 women, mean (SD) age 40.5 (12.6) years (range 20-67 years). Ambulatory monitorin