PABLO MARIA ALBERTO POMERANTZEFF
Projetos de Pesquisa
Unidades Organizacionais
Departamento de Cardio-Pneumologia, Faculdade de Medicina - Docente
Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina
LIM/11 - Laboratório de Cirurgia Cardiovascular e Fisiopatologia da Circulação, Hospital das Clínicas, Faculdade de Medicina - Líder
LIM/65, Hospital das Clínicas, Faculdade de Medicina
Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina
LIM/11 - Laboratório de Cirurgia Cardiovascular e Fisiopatologia da Circulação, Hospital das Clínicas, Faculdade de Medicina - Líder
LIM/65, Hospital das Clínicas, Faculdade de Medicina
7 resultados
Resultados de Busca
Agora exibindo 1 - 7 de 7
- Quality improvement program in Latin America decreases mortality after cardiac surgery: a before-after intervention study(2022) MEJIA, Omar Asdrubal Vilca; BORGOMONI, Gabrielle Barbosa; DALLAN, Luis Roberto Palma; MIOTO, Bruno Mahler; ACCORSI, Tarso Augusto Duenhas; LIMA, Eduardo Gomes; SOEIRO, Alexandre de Matos; LIMA, Felipe Gallego; BRANDAO, Carlos Manuel de Almeida; POMERANTZEFF, Pablo Maria Alberto; DALLAN, Luis Alberto Oliveira; LISBOA, Luiz Augusto FerreiraBackground: The current challenge of cardiac surgery (CS) is to improve outcomes in adverse scenarios. The aim of this study was to assess the impact of a quality improvement program (QIP) on hospital mortality in the largest CS center in Latin America.Methods: Patients were divided into two groups: before (Jan 2013-Dec 2015, n = 3534) and after establishment of the QIP (Jan 2017-Dec 2019, n = 3544). The QIP consisted of the implementation of 10 central initiatives during 2016. The procedures evaluated were isolated coronary artery bypass grafting surgery (CABG), mitral valve surgery, aortic valve surgery, combined mitral and aortic valve surgery, and CABG associated with heart valve surgery. Propensity Score Matching (PSM) was used to adjust for inequality in patients' preoperative characteristics before and after the implementation of QIP. A multivariate logistic regression model was built to predict hospital mortality and validated using discrimination and calibration metrics.Results: The PMS paired two groups using 5 variables, obtaining 858 patients operated before (non-QIP) and 858 patients operated after the implementation of the QIP. When comparing the QIP versus Non-QIP group, there was a shorter length of stay in all phases of hospitalization. In addition, the patients evolved with less anemia (P = 0.001), use of intra-aortic balloon pump (P = 0.003), atrial fibrillation (P = 0.001), acute kidney injury (P < 0.001), cardiogenic shock (P = 0.011), sepsis (P = 0.046), and hospital mortality (P = 0.001). In the multiple model, among the predictors of hospital mortality, the lack of QIP increased the chances of mortality by 2.09 times.Conclusion: The implementation of a first CS QIP in Latin America was associated with a reduction in length of hospital stay, complications and mortality after the cardiac surgeries analyzed.
- Epigenetic regulation of transcription factor binding motifs promotes Th1 response in Chagas disease cardiomyopathy(2022) BROCHET, Pauline; IANNI, Barbara Maria; LAUGIER, Laurie; FRADE, Amanda Farage; NUNES, Joao Paulo Silva; TEIXEIRA, Priscila Camillo; MADY, Charles; FERREIRA, Ludmila Rodrigues Pinto; FERRE, Quentin; SANTOS, Ronaldo Honorato Barros; KURAMOTO, Andreia; CABANTOUS, Sandrine; STEFFEN, Samuel; STOLF, Antonio Noedir; POMERANTZEFF, Pablo; FIORELLI, Alfredo Inacio; BOCCHI, Edimar Alcides; PISSETTI, Cristina Wide; SABA, Bruno; CANDIDO, Darlan da Silva; DIAS, Fabricio C.; SAMPAIO, Marcelo Ferraz; GAIOTTO, Fabio Antonio; MARIN-NETO, Jose Antonio; FRAGATA, Abilio; ZANIRATTO, Ricardo Costa Fernandes; SIQUEIRA, Sergio; PEIXOTO, Giselle De Lima; RIGAUD, Vagner Oliveira-Carvalho; BACAL, Fernando; BUCK, Paula; ALMEIDA, Rafael Ribeiro; LIN-WANG, Hui Tzu; SCHMIDT, Andre; MARTINELLI, Martino; HIRATA, Mario Hiroyuki; DONADI, Eduardo Antonio; PEREIRA, Alexandre Costa; RODRIGUES JUNIOR, Virmondes; PUTHIER, Denis; KALIL, Jorge; SPINELLI, Lionel; CUNHA-NETO, Edecio; CHEVILLARD, ChristopheChagas disease, caused by the protozoan Trypanosoma cruzi, is an endemic parasitic disease of Latin America, affecting 7 million people. Although most patients are asymptomatic, 30% develop complications, including the often-fatal Chronic Chagasic Cardiomyopathy (CCC). Although previous studies have demonstrated some genetic deregulations associated with CCCs, the causes of their deregulations remain poorly described. Based on bulk RNA-seq and whole genome DNA methylation data, we investigated the genetic and epigenetic deregulations present in the moderate and severe stages of CCC. Analysis of heart tissue gene expression profile allowed us to identify 1407 differentially expressed transcripts (DEGs) specific from CCC patients. A tissue DNA methylation analysis done on the same tissue has permitted the identification of 92 regulatory Differentially Methylated Regions (DMR) localized in the promoter of DEGs. An in-depth study of the transcription factors binding sites (TFBS) in the DMRs corroborated the importance of TFBS's DNA methylation for gene expression in CCC myocardium. TBX21, RUNX3 and EBF1 are the transcription factors whose binding motif appears to be affected by DNA methylation in the largest number of genes. By combining both transcriptomic and methylomic analysis on heart tissue, and methylomic analysis on blood, 4 biological processes affected by severe CCC have been identified, including immune response, ion transport, cardiac muscle processes and nervous system. An additional study on blood methylation of moderate CCC samples put forward the importance of ion transport and nervous system in the development of the disease.
conferenceObject Transcatheter aortic valve implantation without contrast media technique in chronic kidney disease population - pilot study(2022) NICZ, P.; FREIRE, A. F. D.; FILIPPINI, F. B.; KANHOUCHE, G.; ACCORSI, T. A. D.; RIBEIRO, H. B.; LIBERATO, G.; NOMURA, C. H.; CASSAR, R. S.; VIEIRA, M. L.; MATHIAS, W.; POMERANTZEFF, P. M. A.; TARASOUTCHI, F.; ABIZAID, A.; BRITO JR., F. S. De- Matrix Metalloproteinase 2 and 9 Enzymatic Activities are Selectively Increased in the Myocardium of Chronic Chagas Disease Cardiomyopathy Patients: Role of TIMPs(2022) BARON, Monique Andrade; FERREIRA, Ludmila Rodrigues Pinto; TEIXEIRA, Priscila Camillo; MORETTI, Ana Iochabel Soares; SANTOS, Ronaldo Honorato Barros; FRADE, Amanda Farage; KURAMOTO, Andreia; DEBBAS, Victor; BENVENUTI, Luiz Alberto; GAIOTTO, Fabio Antonio; BACAL, Fernando; POMERANTZEFF, Pablo; CHEVILLARD, Christophe; KALIL, Jorge; CUNHA-NETO, EdecioChronic Chagas disease (CCC) is an inflammatory dilated cardiomyopathy with a worse prognosis compared to other cardiomyopathies. We show the expression and activity of Matrix Metalloproteinases (MMP) and of their inhibitors TIMP (tissue inhibitor of metalloproteinases) in myocardial samples of end stage CCC, idiopathic dilated cardiomyopathy (DCM) patients, and from organ donors. Our results showed significantly increased mRNA expression of several MMPs, several TIMPs and EMMPRIN in CCC and DCM samples. MMP-2 and TIMP-2 protein levels were significantly elevated in both sample groups, while MMP-9 protein level was exclusively increased in CCC. MMPs 2 and 9 activities were also exclusively increased in CCC. Results suggest that the balance between proteins that inhibit the MMP-2 and 9 is shifted toward their activation. Inflammation-induced increases in MMP-2 and 9 activity and expression associated with imbalanced TIMP regulation could be related to a more extensive heart remodeling and poorer prognosis in CCC patients.
- Cardiovascular findings in Williams-Beuren Syndrome: Experience of a single center with 127 cases(2022) HONJO, Rachel Sayuri; MONTELEONE, Vanessa Figueiredo; AIELLO, Vera Demarchi; WAGENFUHR, Jaqueline; ISSA, Victor Sarli; POMERANTZEFF, Pablo Maria Alberto; FURUSAWA, Erika Arai; ZANARDO, Evelin Aline; KULIKOWSKI, Leslie Domenici; BERTOLA, Debora Romeo; KIM, Chong AeWilliams-Beuren syndrome (WBS) is a rare, microdeletion syndrome characterized by facial dysmorphisms, intellectual disability, a friendly personality, cardiovascular and other abnormalities. Cardiovascular defects (CVD) are among the most prevalent characteristics in WBS, being supravalvular aortic stenosis (SVAS) the most frequent, followed by peripheral pulmonary stenosis (PPS). A comprehensive retrospective review of medical records of 127 patients with molecular diagnosis of WBS, in a period of 20 years, was done to evaluate the incidence, the natural history of cardiovascular disease, and the need for surgical intervention, including heart transplantation (HT). A total of 94/127 patients presented with CVD. Of these 94 patients, 50% presented with SVAS and 22.3% needed heart surgery and/or cardiac catheterization including one that required HT due to severe SVAS-related heart failure at 19 years of age. The patient died in the postoperative period due to infectious complications. Cardiovascular problems are the major cause of sudden death in patients with WBS, who have a significantly higher mortality risk associated with surgical interventions. There is a higher risk for anesthesia-related adverse events and for major adverse cardiac events following surgery. End-stage heart failure due to myocardial ischemia has been described in WBS patients and it is important to consider that HT can become their only viable option. To our knowledge, the case mentioned here is the first HT reported in an adolescent with WBS. HT can be a viable therapeutic option in WBS patients with adequate evaluation, planning, and a multidisciplinary team to provide the required perioperative care and follow-up.
- Myxomatous Mitral Valve Mechanical Characterization(2022) SANTIAGO, A. G.; MALMONGE, S. M.; POMERANTZEFF, P. M. A.; I, J. Figueiredo; GUTIERREZ, M. A.The mitral valve (MV) along with the tricuspid valve are part of the atriovalvar complex and, when committed by myxomatous disease, suffers from tissue degeneration with severs changes in its mechanical properties, consequently loosing its coaptation capability, resulting in the well known Mitral Regurgitation (MR). This paper presents the results of stress x strain tests of 19 mitral valve posterior leaflets committed by myxomatous disease extracted from patients undergoing MV repair surgery. Due to their dimensions, only uni axial testes were performed, i.e., only the radial direction was considered. Are presented the Young Modulus, Yielding and Linearity limits. The Young Modulus obtained for myxomatous MV are compared to normal values found in the literature.
- Redo aortic valve surgery in a case of dextrocardia with situs inversus totalis(2022) DINATO, Fabricio Jose; BRANDAO, Carlos Manuel de Almeida; VERONESE, Elinthon Tavares; POMERANTZEFF, Pablo Maria Alberto; JATENE, Fabio BiscegliIntroduction: Dextrocardia is a rare congenital cardiac anomaly where the base-apex axis of the heart is directed to the right side. It may be associated with situs solitus, situs inversus, or situs ambiguous. Such cases are technically challenging when heart surgery is needed. Presentation of case: We presented a case of a patient with dextrocardia and situs inversus totalis, who had severe aortic bioprosthetic valve degeneration needing a redo aortic valve replacement. Our operative strategy was to change the position of the main surgeon to the left side of the patient to perform most surgical steps. Discussion: A meticulous pre-operative surgical plan involving the whole team was very important for a smooth intra-operative course and a favourable outcome. Regarding the position of the main surgeon standing on the left side of the patient, we believed this surgical team arrangement added much to the technical ease for the pro-cedure, since the anatomy was opposite to what our minds are used to. Also, computed tomography scan played a crucial role for a proper preoperative anatomical evaluation and surgical planning. Conclusion: Our approach with the surgeon on the left side provided excellent exposure for redo aortic valve replacement in dextrocardia with situs inversus totalis. This surgical management played an important role for the good result in this technically challenging scenario.