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Your search keyword '"Parga, José R."' showing total 37 results
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37 results on '"Parga, José R."'

1. Cyanide and Copper Recovery from Barren Solution of the Merrill Crowe Process

Author

Parga, José R., Valenzuela, Jesús L., Díaz, J. A., Kvithyld, Anne, editor, Meskers, Christina, editor, Kirchain, Randolph, editor, Krumdick, Gregory, editor, Mishra, Brajendra, editor, Reuter, Markus, editor, Wang, Cong, editor, Schlesinger, Mark, editor, Gaustad, Gabrielle, editor, Lados, Diana, editor, and Spangenberger, Jeffrey, editor

Published
2016
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28. Late Gadolinium Enhancement Magnetic Resonance Imaging in the Diagnosis and Prognosis of Endomyocardial Fibrosis Patients

Author

Salemi, Vera M.C., primary, Rochitte, Carlos E., additional, Shiozaki, Afonso A., additional, Andrade, Joalbo M., additional, Parga, José R., additional, de Ávila, Luiz F., additional, Benvenuti, Luiz A., additional, Cestari, Ismar N., additional, Picard, Michael H., additional, Kim, Raymond J., additional, and Mady, Charles, additional

Published
2011
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31. Abstract 4189: The Amount of Myocardial Fibrosis by Contrast-Enhanced Magnetic Resonance Imaging Predicts Mortality Late after Aortic Valve Replacement in Patients with Severe Aortic Valve Disease: Validation against Quantitative Histopathology

Author

Azevedo, Clerio F, primary, Nigri, Marcelo, additional, Tarasoutchi, Flávio, additional, Pommerantzeff, Pablo M, additional, Sampaio, Roney O, additional, Parga, José R, additional, Ávila, Luiz F, additional, Spina, Guilherme S, additional, Grinberg, Max, additional, Higuchi, Maria L, additional, and Rochitte, Carlos E, additional

Published
2008
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34. Myocardial Delayed Enhancement by Magnetic Resonance Imaging in Patients With Chagas’ Disease A Marker of Disease Severity

Author

Rochitte, Carlos E., Oliveira, Paulo F., Andrade, Joalbo M., Ianni, Bárbara M., Parga, José R., Ávila, Luiz F., Kalil-Filho, Roberto, Mady, Charles, Meneghetti, José C., Lima, João A.C., and Ramires, José A.F.

Abstract

ObjectivesWe sought to investigate whether myocardial delayed enhancement (MDE) by magnetic resonance imaging (MRI) could quantify myocardial fibrosis (MF) in patients with Chagas’ heart disease (CHD), thus defining the severity of the disease.BackgroundMyocardial fibrosis secondary to ischemic disease can be imaged using MDE. Advanced CHD is characterized by progressive MF.MethodsFifty-one patients with CHD were enrolled: 15 seropositive asymptomatic participants in the indeterminate phase (IND); 26 patients with known clinical CHD; and 10 patients with known CHD and ventricular tachycardia (VT). Using a 1.5-T MRI system, we acquired left ventricular (LV) short-axis slices using cine-MRI (LV function) and inversion-recovery gradient-echo (MDE).ResultsMyocardial fibrosis by MRI was present in 68.6% of all patients, in 20% of IND, 84.6% of CHD, and 100% of VT (p < 0.001). Quantified MF increased progressively across disease severity subgroups (0.9 ± 2.3% in IND; 16.0 ± 12.3% in CHD; and 25.4 ± 9.8% in VT, p < 0.001) and New York Heart Association functional classes (I: 7.5 ± 9.5%; II: 21.9 ± 13.8%; and III: 25.3 ± 9.9% of LV mass, p < 0.001). Left ventricular ejection fraction and MF had significant negative correlation (r = −0.78, p < 0.001), similar to the segmental MF and function: 4.9 ± 15.1% of MF in normal function, 32.5 ± 32.5% in mildly hypokinetic, 57.8 ± 31.4% in severely hypokinetic, and 72.3 ± 36.2% in akinetic and dyskinetic segments, respectively (p < 0.001).ConclusionsIn CHD, MDE by MRI quantifies MF that not only can be detected in the early asymptomatic stages but parallels well-established prognostic factors and provides unique information for clinical disease staging.

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35. [Coronary calcium score as predictor of stenosis and events in pretransplant renal chronic failure].

Author

Rosário MA, Lima JJ, Parga JR, Avila LF, Gowdak LH, Lemos PA, and Rochitte CE

Subjects
Adult, Aged, Epidemiologic Methods, Female, Humans, Kidney Transplantation, Male, Middle Aged, Predictive Value of Tests, Prognosis, Calcinosis diagnostic imaging, Coronary Angiography methods, Coronary Stenosis diagnostic imaging, Kidney Failure, Chronic complications, Tomography, X-Ray Computed methods
Abstract

Background: Coronary artery disease (CAD) is the major cause of death among chronic renal failure (CRF) patients. Traditional, non-invasive exams to detect CAD and to predict events have shown insufficient results in this group. CT Scan evaluation of Coronary Calcium Score (CCS) has proven to be of prognostic value for the population reporting no renal condition., Objective: To investigate CCS accuracy in detecting obstructive CAD and in predicting cardiovascular events in candidates to renal transplant as compared to quantitative invasive coronary angiography (ICA)., Methods: Ninety-seven (97) CRF patients aged > or =35 were evaluated. Obstructive CAD was considered as > or =50% or > or =70% stenosis on ICA. Descriptive data, concordance, diagnostic tests, Kaplan-Meier, and multivariate analysis were used., Results: Agatston mean score was 580.6 +/- 1,102.2. Minimum and maximum values were 0 and 7,994, with median at 176. Only 14 patients had zero calcium score. No differences were reported in regard to ethnicity. Highest regional calcium was associated to the highest probability of coronary stenosis in the same segment. Agatston calcium score showed high accuracy for the diagnosis of > or =50% and > or =70% stenosis, with area under ROC curve (AUC) of 0.75 and 0.70, respectively. At the threshold of 400, calcium score identified a subgroup with a higher rate of cardiovascular events at an average follow-up time of 29+/-11.0 months., Conclusion: CCS proved to have good diagnostic and prognostic performance for cardiovascular events evaluation in CRF patients.

Published
2010
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37. Images in cardiovascular medicine. Cardiac sarcoidosis evaluated by delayed-enhanced magnetic resonance imaging.

Author

Serra JJ, Monte GU, Mello ES, Coral GP, Avila LF, Parga JR, Ramires JA, and Rochitte CE

Subjects
Cardiomyopathies complications, Chronic Disease, Electrocardiography, Female, Fibrosis complications, Heart Aneurysm diagnosis, Heart Aneurysm etiology, Hepatitis diagnosis, Hepatitis etiology, Humans, Image Enhancement, Internet, Jaundice etiology, Lymphatic Diseases diagnostic imaging, Lymphatic Diseases etiology, Magnetic Resonance Imaging, Cine, Middle Aged, Sarcoidosis complications, Tomography, X-Ray Computed, Video Recording, Weight Loss, Cardiomyopathies diagnosis, Fibrosis diagnosis, Magnetic Resonance Imaging methods, Sarcoidosis diagnosis
Published
2003
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