JOSE RODRIGUES PARGA FILHO
Projetos de Pesquisa
Unidades Organizacionais
Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina - Médico
LIM/65, Hospital das Clínicas, Faculdade de Medicina
LIM/65, Hospital das Clínicas, Faculdade de Medicina
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conferenceObject BIOMARKERS AND CMR WITH LATE GADOLINIUM ENHANCEMENT FOR DIAGNOSIS OF PROCEDURE-RELATED MYOCARDIAL NECROSIS: A PROSPECTIVE TRIAL USING THE THIRD UNIVERSAL DEFINITION OF MYOCARDIAL INFARCTION(2013) HUEB, Whady; NOMURA, Cesar; VILLA, Alexandre V.; PARGA, Jose; COSTA, Leandro; MELO, Rodrigo M. V.; OIKAWA, Fernando T. C.; STRUNZ, Celia; REZENDE, Paulo; LIMA, Eduardo; GARZILLO, Cibele L.; RIBEIRO, Expedito E.; HUEB, Alexandre; SERRANO, Carlos; RAMIRES, Jose; KALIL-FILHO, RobertoBackground: The elevation of cardiac biomarkers after percutaneous or surgical myocardial revascularization procedures is common. However, the correlation between the release and the diagnosis of procedure-related myocardial infarction (Ml) remains unknown. In this study we aim to compare the release of cardiac biomarkers after mechanical interventions with the presence of late gadolinium enhancement (LGE) in cardiac magnetic resonance (CMR). Methods: In this prospective study, we evaluated 64 stable multivessel coronary artery disease patients with preserved ventricular function and formal indication to revascularization. The release of troponin and CKMB for diagnosis of procedure-related Ml was defined as the third universal definition of Ml. CMR with LGE was performed in all patients before and after interventions. Measurements of cardiac biomarkers were performed before and after the procedure, every 6 hours until 48h after PCI and 72h after CABG. Results: Of 64 patients, 44 (68.8%) underwent CABG and 20 (31.2%) underwent PCI; 46 (72%) were male, 45 (70%) had 3-vessel disease, 33 (52%) had diabetes and 23 (36%) had class Ill/IV of angina. For CABG patients, injury occurred in 95.5% (troponin) and 25% (CKMB); for PCI patients injury occurred in 70% (troponin) and 5% (CKMB). From the initial 64 patients, 14 (21.9%) had new LGE on post-procedure CMR, 13 after CABG and 1 after PCI. From these 14 patients, 7 (50%) presented elevation of CKMB above the cutoffs and troponin was elevated in all patients. From the 50 patients with no new LGE on CMR, 5 (10%) presented CKMB elevation and 42 (84%) presented troponin elevation above the 99th percentile. Based on current cutoffs, troponin had a sensitivity of 100% and specificity of 16% (positive predictive value of 25% and negative predictive value of 100%). CKMB had a sensitivity of 50% and specificity of 90% (positive predictive value of 58% and negative predictive value of 87%). Conclusion: In this study, cardiac biomarkers had a low accuracy for the diagnosis of procedure-related myocardial infarction based on LGE CMR.- Myocardial fibrosis detected by cardiac CT predicts ventricular fibrillation/ventricular tachycardia events in patients with hypertrophic cardiomyopathy(2013) SHIOZAKI, Afonso Akio; SENRA, Tiago; ARTEAGA, Edmund; MARTINELLI FILHO, Martino; PITA, Cristiane Guedes; AVILA, Luis Francisco R.; PARGA FILHO, Jose Rodrigues; MADY, Charles; KALIL-FILHO, Roberto; BLUEMKE, David A.; ROCHITTE, Carlos EduardoBackground: Myocardial fibrosis (MF) occurs in up to 80% of subjects with asymptomatic or mildly symptomatic hypertrophic cardiomyopathy (HCM) and can constitute an arrhythmogenic substrate for re-entrant, life-threatening ventricular arrhythmias in predisposed persons. Objective: The aim was to investigate whether MF detected by delayed enhancement cardiac CT is predictive of ventricular tachycardia (VT) and fibrillation (VF) that require appropriate therapy by an implantable cardioverter defibrillator (ICD) in patients with HCM. Methods: Twenty-six patients with HCM with previously (for at least 1 year) implanted ICD underwent MF evaluation by cardiac CT. MF was quantified by myocardial delayed enhanced cardiac CT. Data on ICD firing were recorded every 3 months after ICD implantation. Risk factors for sudden cardiac death in patients with HCM were evaluated in all patients. Results: MF was present in 25 of 26 patients (96%) with mean fibrosis mass of 20.5 +/- 15.8 g. Patients with appropriate ICD shocks for VF/VT had significantly greater MF mass than patients without (29.10 +/- 19.13 g vs 13.57 +/- 8.31 g; P = .01). For a MF mass of at least 18 g, sensitivity and specificity for appropriate ICD firing were 73% (95% CI, 49%-88%) and 71% (95% CI, 56%-81%), respectively. Kaplan-Meier curves indicated a significantly greater VF/VT event rate in patients with MF mass >= 18 g than in patients with MF <18 g (P = .02). In the Cox regression analysis, the amount of MF was independently associated with VF/VT in ICD-stored electrograms. Conclusion: The mass of MF detected by cardiac CT in patients with HCM at high risk of sudden death was associated with appropriate ICD firings.
- Chronic troponin elevation assessed by myocardial T1 mapping in patients with stable coronary artery disease(2023) SEGRE, Carlos Alexandre W.; LEMOS, James A. de; ASSUNCAO, Antonildes Nascimento; NOMURA, Cesar Higa; FAVARATO, Desiderio; STRUNZ, Celia Maria Cassaro; VILLA, Alexandre Volney; PARGA FILHO, Jose Rodrigues; REZENDE, Paulo Cury; HUEB, Whady; RAMIRES, Jose Antonio Franchini; KALIL FILHO, Roberto; SERRANO, Carlos VicenteBackground:Cardiac troponin detected with sensitive assays can be chronically elevated, in the absence of unstable coronary syndromes. In patients with chronic coronary artery disease, clinically silent ischemic episodes may cause chronic troponin release. T1 mapping is a cardiovascular magnetic resonance technique useful in quantitative cardiac tissue characterization. We selected patients with anatomically and functionally normal hearts to investigate associations between chronic troponin release and myocardial tissue characteristics assessed by T1 mapping. Methods:We investigated the relationship between cardiac troponin I concentrations and cardiovascular magnetic resonance T1 mapping parameters in patients with stable coronary artery disease enrolled in MASS V study before elective revascularization. Participants had no previous myocardial infarction, negative late gadolinium enhancement, normal left ventricular function, chamber dimensions and wall thickness. Results:A total of 56 patients were analyzed in troponin tertiles: nativeT1 and extracellular volume (ECV) values (expressed as means +/- standard deviations) increased across tertiles: nativeT1 (1006 +/- 27 ms vs 1016 +/- 27 ms vs 1034 +/- 37 ms, ptrend = 0.006) and ECV (22 +/- 3% vs 23 +/- 1.9% vs 25 +/- 3%, ptrend = 0.007). Cardiac troponin I concentrations correlated with native T1(R = 0.33, P = .012) and ECV (R = 0.3, P = .025), and were independently associated with nativeT1 (P = .049) and ventricular mass index (P = .041) in multivariable analysis. Conclusion:In patients with chronic coronary artery disease and structurally normal hearts, troponin I concentrations correlated with T1 mapping parameters, suggesting that diffuse edema or fibrosis scattered in normal myocardium might be associated with chronic troponin release.
conferenceObject Clinical, electrocardiographic, echocardiographic and cardiac magnetic resonance imaging follow-up in patients with non-compaction cardiomyopathy in isolation or in association with other diseases(2018) ROCON, C.; MELO, M. D. Tavares De; ARAUJO FILHO, J. A.; PARGA FILHO, J. R.; HAJJAR, L. A.; KALIL FILHO, R.; BOCCHI, E. A.; SALEMI, V. M.- Myocardial tissue characterization in Chagas' heart disease by cardiovascular magnetic resonance(2015) TORREAO, Jorge A.; IANNI, Barbara M.; MADY, Charles; NAIA, Evandro; RASSI, Carlos H.; NOMURA, Cesar; PARGA, Jose R.; AVILA, Luis F.; RAMIRES, Jose A. F.; KALIL-FILHO, Roberto; ROCHITTE, Carlos E.Background: Chagas' heart disease is an important public health problem in South America. Several aspects of the pathogenesis are not fully understood, especially in its subclinical phases. On pathology Chagas' heart disease is characterized by chronic myocardial inflammation and extensive myocardial fibrosis. The latter has also been demonstrated by late gadolinium enhancement (LGE) by cardiovascular magnetic resonance (CMR). In three clinical phases of this disease, we sought to investigate the presence of LGE, myocardial increase in signal intensity in T2-weighted images (T2W) and in T1-weighted myocardial early gadolinium enhancement (MEGE), previously described CMR surrogates for myocardial fibrosis, myocardial edema and hyperemia, respectively. Methods: Fifty-four patients were analyzed. Sixteen patients with the indeterminate phase (IND), seventeen patients with the cardiac phase with no left ventricular systolic dysfunction (CPND), and twenty-one patients with the cardiac phase with left ventricular systolic dysfunction (CPD). All patients underwent 1.5 T CMR scan including LGE, T2W and MEGE image sequences to evaluate myocardial abnormalities. Results: Late gadolinium enhancement was present in 72.2 % of all patients, in 12.5 % of IND, 94.1 % of the CPND and 100 % of the CPD patients (p < 0.0001). Myocardial increase in signal intensity in T2-weighted images (T2W) was present in 77.8 % of all patients, in 31.3 % of the IND, 94.1 % of the CPND and 100 % of the CPD patients (p < 0.0001). T1-weighted myocardial early gadolinium enhancement (MEGE) was present in 73.8 % of all patients, in 25.0 % of the IND, 92.3 % of the CPND and 94.1 % of the CPD (p < 0.0001). A good correlation between LGE and T2W was observed (r = 0.72, and p < 0.001). Conclusions: Increase in T2-weighted (T2W) myocardial signal intensity and T1-weighted myocardial early gadolinium enhancement (MEGE) can be detected by CMR in patients throughout all phases of Chagas' heart disease, including its subclinical presentation (IND). Moreover, those findings were parallel to myocardial fibrosis (LGE) in extent and location and also correlated with the degree of Chagas' heart disease clinical severity. These findings contribute to further the knowledge on pathophysiology of Chagas' heart disease, and might have therapeutic and prognostic usefulness in the future.
conferenceObject Biventricular imaging markers to predict outcome in non-compaction cardiomyopathy: a machine learning study(2018) ROCON, C.; TABASSIAN, M.; MELO, M. D. Tavares De; ARAUJO FILHO, J. A.; PARGA FILHO, J. R.; HAJJAR, L. A.; KALIL FILHO, R.; BOCCHI, E. A.; D'HOOGE, J.; SALEMI, V. M. C.- Hypotheses, rationale, design, and methods for prognostic evaluation of cardiac biomarker elevation after percutaneous and surgical revascularization in the absence of manifest myocardial infarction. A comparative analysis of biomarkers and cardiac magnetic resonance. The MASS-V Trial(2012) HUEB, Whady; GERSH, Bernard J.; REZENDE, Paulo Cury; GARZILLO, Cibele Larrosa; LIMA, Eduardo Gomes; VIEIRA, Ricardo D'Oliveira; GARCIA, Rosa Maria Rahmi; FAVARATO, Desiderio; SEGRE, Carlos Alexandre W.; PEREIRA, Alexandre Costa; SOARES, Paulo Rogerio; RIBEIRO, Expedito; LEMOS, Pedro; PERIN, Marco A.; STRUNZ, Celia Cassaro; DALLAN, Luis A. O.; JATENE, Fabio B.; STOLF, Noedir A. G.; HUEB, Alexandre Ciappina; DIAS, Ricardo; GAIOTTO, Fabio A.; COSTA, Leandro Menezes Alves da; OIKAWA, Fernando Teiichi Costa; MELO, Rodrigo Morel Vieira de; SERRANO JUNIOR, Carlos Vicente; AVILA, Luiz Francisco Rodrigues de; VILLA, Alexandre Volney; PARGA FILHO, Jose Rodrigues; NOMURA, Cesar; RAMIRES, Jose A. F.; KALIL FILHO, RobertoBackground: Although the release of cardiac biomarkers after percutaneous (PCI) or surgical revascularization (CABG) is common, its prognostic significance is not known. Questions remain about the mechanisms and degree of correlation between the release, the volume of myocardial tissue loss, and the long-term significance. Delayed-enhancement of cardiac magnetic resonance (CMR) consistently quantifies areas of irreversible myocardial injury. To investigate the quantitative relationship between irreversible injury and cardiac biomarkers, we will evaluate the extent of irreversible injury in patients undergoing PCI and CABG and relate it to postprocedural modifications in cardiac biomarkers and long-term prognosis. Methods/Design: The study will include 150 patients with multivessel coronary artery disease (CAD) with left ventricle ejection fraction (LVEF) and a formal indication for CABG; 50 patients will undergo CABG with cardiopulmonary bypass (CPB); 50 patients with the same arterial and ventricular condition indicated for myocardial revascularization will undergo CABG without CPB; and another 50 patients with CAD and preserved ventricular function will undergo PCI using stents. All patients will undergo CMR before and after surgery or PCI. We will also evaluate the release of cardiac markers of necrosis immediately before and after each procedure. Primary outcome considered is overall death in a 5-year follow-up. Secondary outcomes are levels of CK-MB isoenzyme and I-Troponin in association with presence of myocardial fibrosis and systolic left ventricle dysfunction assessed by CMR. Discussion: The MASS-V Trial aims to establish reliable values for parameters of enzyme markers of myocardial necrosis in the absence of manifest myocardial infarction after mechanical interventions. The establishments of these indices have diagnostic value and clinical prognosis and therefore require relevant and different therapeutic measures. In daily practice, the inappropriate use of these necrosis markers has led to misdiagnosis and therefore wrong treatment. The appearance of a more sensitive tool such as CMR provides an unprecedented diagnostic accuracy of myocardial damage when correlated with necrosis enzyme markers. We aim to correlate laboratory data with imaging, thereby establishing more refined data on the presence or absence of irreversible myocardial injury after the procedure, either percutaneous or surgical, and this, with or without the use of cardiopulmonary bypass.
conferenceObject HIGH SENSITIVITY CARDIAC TROPONIN I CHANGES RELATED WITH T1 MAPPING IN PATIENTS WITH CHRONIC ISCHAEMIC HEART DISEASE WITHOUT LATE ENHANCEMENT GADOLINIUM BY CRM(2015) SEGRE, Carlos; ASSUNCAO JUNIOR, Antonildes Nascimento; NOMURA, Cesar; VILLA, Alexandre; STRUNZ, Celia; REZENDE, Paulo; PARGA, Jose; TAKIUTI, Myrthes Emy; HUEB, Whady; RAMIRES, Jose; KALIL-FILHO, Roberto- Exercise-Induced Decrease in Myocardial High-Energy Phosphate Metabolites in Patients With Chagas Heart Disease(2013) LEME, Ana Maria Betim Paes; SALEMI, Vera Maria Cury; WEISS, Robert G.; PARGA, Jose Rodrigues; IANNI, Barbara Maria; MADY, Charles; KALIL-FILHO, RobertoBackground: The influence of exercise on cardiac metabolic response in patients with Chagas disease is incompletely understood. Methods and Results: Changes in cardiac energetic metabolism were investigated in Chagas disease patients before and during isometric handgrip exercise with P-31 magnetic resonance spectroscopy (MRS). Twenty-eight patients (10 with systolic dysfunction: group I; 10 with normal systolic function and electrocardiogram (ECG) abnormalities: group II; and 8 asymptomatic without ECG abnormalities: group III) and 8 healthy control subjects (group C) were evaluated by electrocardiogram, echocardiogram, functional tests for coronary artery disease, and image-selected localized cardiac P-31-MRS. The myocardial phosphocreatine to [beta-phosphate]adenosine triphosphate ratio (PCr/beta-ATP) was measured at rest and during isometric handgrip exercise. Exercise testing or 99mTc-sestamibi scintigraphy were negative for myocardial ischemia in all individuals. At rest, cardiac PCr/beta-ATP was decreased in all Chagas groups (1.23 +/- 0.37) versus group C (1.88 +/- 0.08; P < .001) and was lower in group I (0.89 +/- 0.24) versus groups II (1.44 +/- 0.23) and III (1.40 +/- 0.37; P < .001). There was no stress-induced change in cardiac PCr/beta-ATP (1.88 +/- 0.08 at rest vs 1.89 +/- 0.08 during exercise; P = NS) in group C. Mean cardiac PCr/beta-ATP was 0.89 +/- 0.24 and 0.56 +/- 0.21 at rest and during exercise, respectively, in group I (37% decrease; P < .001). In group II, PCr/beta-ATP was 1.44 +/- 0.23 at rest and 0.97 +/- 0.37 during exercise (33% decrease; P < .001). In group III, PCr/beta-ATP was 1.40 +/- 0.37 at rest and 0.60 +/- 0.19 during exercise (57% decrease; P < .001). Conclusions: Myocardial high-energy phosphates are reduced at rest in Chagas heart disease patients, and the reduction is greater in patients with left ventricular dysfunction. Regardless of left ventricular function, Chagas patients exhibit an exercise-induced decline in cardiac high-energy phosphates consistent with myocardial ischemia, suggesting the possibility that this metabolic approach may offer a tool to probe new interventions in Chagas disease patients.
- Noncompaction cardiomyopathy: a substrate for a thromboembolic event(2015) MELO, Marcelo Dantas Tavares de; ARAUJO FILHO, Jose Arimateia Batista de; PARGA FILHO, Jose Rodrigues; LIMA, Camila Rocon de; MADY, Charles; KALIL-FILHO, Roberto; SALEMI, Vera Maria CuryBackground: Noncompaction cardiomyopathy (NCC) is a rare genetic cardiomyopathy characterized by a thin, compacted epicardial layer and an extensive noncompacted endocardial layer. The clinical manifestations of this disease include ventricular arrhythmia, heart failure, and systemic thromboembolism. Case presentation: A 43-year-old male was anticoagulated by pulmonary thromboembolism for 1 year when he developed progressive dyspnea. Cardiovascular magnetic resonance imaging showed severe biventricular trabeculation with an ejection fraction of 15%, ratio of maximum noncompacted/compacted diastolic myocardial thickness of 3.2 and the presence of exuberant biventricular apical thrombus. Conclusion: Still under discussion is the issue of which patients and when they should be anticoagulated. It is generally recommended to those presenting ventricular systolic dysfunction, antecedent of systemic embolism, presence of cardiac thrombus and atrial fibrillation. In clinical practice the patients with NCC and ventricular dysfunction have been given oral anticoagulation, although there are no clinical trials showing the real safety and benefit of this treatment.