LUIZ FERNANDO CANEO
Projetos de Pesquisa
Unidades Organizacionais
Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina - Médico
LIM/11 - Laboratório de Cirurgia Cardiovascular e Fisiopatologia da Circulação, Hospital das Clínicas, Faculdade de Medicina
LIM/65, Hospital das Clínicas, Faculdade de Medicina - Líder
LIM/11 - Laboratório de Cirurgia Cardiovascular e Fisiopatologia da Circulação, Hospital das Clínicas, Faculdade de Medicina
LIM/65, Hospital das Clínicas, Faculdade de Medicina - Líder
42 resultados
Resultados de Busca
Agora exibindo 1 - 10 de 42
- Suporte Circulatório como Ponte para Transplante Cardíaco Pediátrico(2016) CANEO, Luiz Fernando; MIANA, Leonardo A.; JATENE, Marcelo B.
- Impact of Vacuum-Assisted Venous Drainage on Forward Flow in Simulated Pediatric Cardiopulmonary Bypass Circuits Utilizing a Centrifugal Arterial Pump Head(2020) GUIMARAES, Daniel Peres; CANEO, Luiz Fernando; MATTE, Gregory S.; CARLETTO, Luciana P.; POLICARPO, Valeria Camargo; CASTRO, Ana Vitoria C. X.; MIRANDA, Matheus H. C.; COSTA, Priscila S.; JATENE, Marcelo B.; CESTARI, Idagene; JATENE, Fabio B.Objective: To analyze the impact of vacuum-assisted venous drainage (VAVD) on arterial pump flow in a simulated pediatric cardiopulmonary bypass circuit utilizing a centrifugal pump (CP) with an external arterial filter. Methods: The simulation circuit consisted of a Quadrox-I Pediatric oxygenator, a Rotaflow CP (Maquet Cardiopulmonary AG, Rastatt, Germany), and a custom pediatric tubing set primed with Lactated Ringer's solution and packed red blood cells. Venous line pressure, reservoir pressure, and arterial flow were measured with VAVD turned off to record baseline values. Four other conditions were tested with progressively higher vacuum pressures (-20, -40, -60, and -80 mmHg) applied to the baseline cardiotomy pressure. An arterial filter was placed into the circuit and arterial flow was measured with the purge line in both open and closed positions. These trials were repeated at set arterial flow rates of 1500, 2000, and 2500 mL/min. Results: The use of progressively higher vacuum caused a reduction in effective arterial flow from 1490 +/- 0.00 to 590 +/- 0.00, from 2020 +/- 0.01 to 1220 +/- 0.00, and from 2490 +/- 0.0 to 1830 +/- 0.01 mL/min. Effective forward flow decreased with increased levels of VAVD. Conclusion: The use of VAVD reduces arterial flow when a CP is used as the main arterial pump. The reduction in the forward arterial flow increases as the vacuum level increases. The loss of forward flow is further reduced when the arterial filter purge line is kept in the recommended open position. An independent flow probe is essential to monitor pump flow during cardiopulmonary bypass.
- Blunted peripheral blood supply and underdeveloped skeletal muscle in Fontan patients: The impact on functional capacity(2018) TURQUETTO, Aida Luiza Ribeiro; SANTOS, Marcelo Rodrigues dos; SAYEGH, Ana Luiza Carrari; SOUZA, Francis Ribeiro de; AGOSTINHO, Daniela Regina; OLIVEIRA, Patricia Alves de; SANTOS, Yarla Alves dos; LIBERATO, Gabriela; BINOTTO, Maria Angelica; OTADUY, Maria Concepcion Garcia; NEGRAO, Carlos Eduardo; CANEO, Luiz Fernando; JATENE, Fabio Biscegli; JATENE, Marcelo BiscegliBackground: Changes in circulatory physiology are common in Fontan patients due to suboptimal cardiac output, which may reduce the peripheral blood flow and impair the skeletal muscle. The objective of this study was to investigate the forearm blood flow (FBF), cross-sectional area (CSA) of the thigh and functional capacity in asymptomatic clinically stable patients undergoing Fontan surgery. Methods: Thirty Fontan patients and 27 healthy subjects underwent venous occlusion plethysmography, magnetic resonance imaging of the thigh musculature and maximal cardiopulmonary exercise testing. Muscle sympathetic nerve activity (MSNA), norepinephrine measures, cardiovascular magnetic resonance, handgrip strength and 6-minute walk test were also performed. Results: Fontan patients have blunted FBF (1.59 +/- 0.33 vs 2.17 +/- 0.52 mL/min/100 mL p < 0.001) and forearm vascular conductance (FVC) (1.69 +/- 0.04 vs 2.34 +/- 0.62 units p < 0.001), reduced CSA of the thigh (81.2 +/- 18.6 vs 116.3 +/- 26.4 cm(2) p < 0.001), lower peak VO2 (29.3 +/- 6 vs 41.5 +/- 9mL/kg/min p < 0.001), walked distance (607 +/- 60 vs 701 +/- 58m p < 0.001) and handgrip strength (21 +/- 9 vs 30 +/- 8 kgf p < 0.001). The MSNA (30 +/- 4 vs 22 +/- 3 bursts/min p < 0.001) and norepinephrine concentration [265 (236-344) vs 222 (147-262) pg/mL p = 0.006] were also higher in Fontan patients. Multivariate linear regression showed FVC (beta = 0.653; CI = 0.102-1.205; p = 0.022) and stroke volume (beta = 0.018; CI = 0.007-0.029; p = 0.002) to be independently associated with reduced CSA of the thigh adjusted for body mass index. The CSA of the thigh adjusted for body mass index (beta = 5.283; CI = 2.254-8.312; p = 0.001) was independently associated with reduced peak VO2. Conclusion: Patients with Fontan operation have underdeveloped skeletal muscle with reduced strengh that is associated with suboptimal peripheral blood supply and diminished exercise capacity.
- Heart Retransplantation for Coronary Allograft Vasculopathy in Children: 25 Years of Single -Center Experience(2020) AZEKA, Estela; WALKER, Thomas; SIQUEIRA, Adailson Wagner da Silva; PENHA, Juliano; MIANA, Leonardo; CANEO, Luiz Fernando; MASSOTI, Maria Raquel; TANAMATI, Carla; MIURA, Nana; JATENE, Marcelo Biscegli
- Lessons Learned From a Critical Analysis of the Fontan Operation Over Three Decades in a Single Institution(2017) CANEO, Luiz Fernando; TURQUETTO, Aida L. R.; NEIROTTI, Rodolfo A.; BINOTTO, Maria A.; MIANA, Leonardo A.; TANAMATI, Carla; PENHA, Juliano G.; SILVEIRA, Joao B. D.; SILVA, Thais M. Alexandre e; JATENE, Fabio B.; JATENE, Marcelo B.Background: The Fontan operation (FO) has evolved and many centers have demonstrated improved results relative to those from earlier eras. We report a single-institution experience over three decades, describing the outcomes and evaluating risk factors. Methods: Successive patients undergoing primary FO were divided into era I (1984-1994), era II (1995-2004), and era III (2005-2014). Clinical and operative notes were reviewed for demographic, anatomic, and procedure details. End points included early and late mortality and a composite of death, heart transplantation (HTX), or Fontan takedown. Results: A total of 420 patients underwent 18 atriopulmonary connections, 82 lateral tunnels (LT), and 320 extracardiac conduit (EC) Fontan procedures. Forty-six (11%) patients died; early and late mortality were 7.9% and 3.1%, respectively. Eight (1.9%) patients underwent HTX, 11 (2.6%) underwent Fontan conversion to EC, and 1 (0.2%) takedown of EC to bidirectional Glenn shunt. Prevalence of concomitant valve surgery (P < .001) and pulmonary artery reconstruction (P < .001) differed over the eras. Preoperative valve regurgitation was associated with likelihood of early mortality (odds ratio [OR] = 3.5, P = .002). Embolic events (OR = 1.9, P = .047), preoperative valve regurgitation (OR = 2.3, P = .029), diagnosis of unbalanced atrioventricular canal defect (OR = 1.14, P = .03), and concomitant valve replacement (OR = 6.9, P = .001) during the FO were associated with increased risk of the composite end point (death, HTX, or takedown). Conclusion: Technical modifications did not result in improved results across eras, due in part to more liberal indications for surgery in the recent years. Valve regurgitation, unbalanced atrioventricular canal, embolic events, or concomitant valve replacement were associated with FO failure.
- Improving preoperative risk-of-death prediction in surgery congenital heart defects using artificial intelligence model: A pilot study(2020) CHANG JUNIOR, Joao; BINUESA, Fabio; CANEO, Luiz Fernando; TURQUETTO, Aida Luiza Ribeiro; ARITA, Elisandra Cristina Trevisan Calvo; BARBOSA, Aline Cristina; FERNANDES, Alfredo Manoel da Silva; TRINDADE, Evelinda Marramon; JATENE, Fabio Biscegli; DOSSOU, Paul-Eric; JATENE, Marcelo BiscegliBackground Congenital heart disease accounts for almost a third of all major congenital anomalies. Congenital heart defects have a significant impact on morbidity, mortality and health costs for children and adults. Research regarding the risk of pre-surgical mortality is scarce. Objectives Our goal is to generate a predictive model calculator adapted to the regional reality focused on individual mortality prediction among patients with congenital heart disease undergoing cardiac surgery. Methods Two thousand two hundred forty CHD consecutive patients' data from InCor's heart surgery program was used to develop and validate the preoperative risk-of-death prediction model of congenital patients undergoing heart surgery. There were six artificial intelligence models most cited in medical references used in this study: Multilayer Perceptron (MLP), Random Forest (RF), Extra Trees (ET), Stochastic Gradient Boosting (SGB), Ada Boost Classification (ABC) and Bag Decision Trees (BDT). Results The top performing areas under the curve were achieved using Random Forest (0.902). Most influential predictors included previous admission to ICU, diagnostic group, patient's height, hypoplastic left heart syndrome, body mass, arterial oxygen saturation, and pulmonary atresia. These combined predictor variables represent 67.8% of importance for the risk of mortality in the Random Forest algorithm. Conclusions The representativeness of ""hospital death"" is greater in patients up to 66 cm in height and body mass index below 13.0 for InCor's patients. The proportion of ""hospital death"" declines with the increased arterial oxygen saturation index. Patients with prior hospitalization before surgery had higher ""hospital death"" rates than who did not required such intervention. The diagnoses groups having the higher fatal outcomes probability are aligned with the international literature. A web application is presented where researchers and providers can calculate predicted mortality based on the CgntSCORE on any web browser or smartphone.
conferenceObject Waiting List Risk Factors in Pediatric Heart Transplant Center in the Developing Country(2012) CAUDURO, A. S.; MOREIRA, L. F. P.; TANAMATI, C.; CANEO, L. F.; PENHA, J.; JATENE, M. B.Purpose: Most of data upon waiting list risk factors are based in studies done in developed countries. In this study we aimed to identify what are these risk factors in a health system enviroment of a developing country like Brazil. Methods and Materials: Time on the waiting list was defined as the time of initial listing to the time of removal due a transplant, death, recovery or removed. Survival time in the waiting list was estimated using the Kaplan-Meier method. Univariate and multivariate relationships were evaluated with the Cox proportional hazards model. Results: Of 222 patients the median age was 3.9 yrs, median weight 13Kg; female 52%. Dilated cardiomyopathy 62%, congenital heart disease 25%, restrictive cardiomyopathy10%, chronic graft failure 3%. We had 45%listed as priority. 41% transplant, 40% died, 14% were removed, 5% are still waiting. Survival were 73% in 30 days, 60% in 90, 51% in 6m. Diagnosis, age, weight, urea, level and priorit status were considered predictors in the univariate analysis. Diagnosis of CHD and, priority status, were found as independent risk factors. Conclusions: Less has been known about the mortality risk factors in the waiting list in our enviroment. Actually these data are very similar to those ones retrieved in the early 1990 when the young and very ill children were destined to died. These results support the urgency of adoption of new technologies and new strategies addressed to child in the waiting list.- Translation and Validation of the Boston Technical Performance Score in a Developing Country(2021) MIANA, Leonardo A.; NATHAN, Meena; TENORIO, Davi Freitas; MANUEL, Valdano; GUERREIRO, Gustavo; FERNANDES, Natalia; CAMPOS, Carolina Vieira de; V, Paula Gaiolla; CASSAR, Renata Sa; TURQUETTO, Aida; AMATO, Luciana; CANEO, Luiz Fernando; DARODA, Larissa Leitao; JATENE, Marcelo Biscegli; JATENE, Fabio B.Introduction: The Technical Performance Score (TPS) was developed and subsequently refined at the Boston Children's Hospital. Our objective was to translate and validate its application in a developing country. Methods: The score was translated into the Portuguese language and approved by the TPS authors. Subsequently, we studied 1,030 surgeries from June 2018 to October 2020. TPS could not be assigned in 58 surgeries, and these were excluded. Surgical risk score was evaluated using Risk Adjustment in Congenital Heart Surgery (or RACHS-1). The impact of TPS on outcomes was studied using multivariable linear and logistic regression adjusting for important perioperative covariates. Results: Median age and weight were 2.2 (interquartile range [IQR] = 0.5-13) years and 10.8 (IQR = 5.6-40) kilograms, respectively. In-hospital mortality was 6.58% (n=64), and postoperative complications occurred in 19.7% (n=192) of the cases. TPS was categorized as 1 in 359 cases (37%), 2 in 464 (47.7%), and 3 in 149 (15.3%). Multivariable analysis identified TPS class 3 as a predictor of longer hospital stay (coefficient: 6.6; standard error: 2.2; P=0.003), higher number of complications (odds ratio [OR]: 1.84; 95% confidence interval [CI]: 1.1-3; P=0.01), and higher mortality (OR: 3.2; 95% CI: 1.4-7; P=0.004). Conclusion: TPS translated into the Portuguese language was validated and showed to be able to predict higher mortality, complication rate, and prolonged postoperative hospital stay in a high-volume Latin-American congenital heart surgery program. TPS is generalizable and can be used as an outcome assessment tool in resource diverse settings.
- Impaired Pulmonary Function is an Additional Potential Mechanism for the Reduction of Functional Capacity in Clinically Stable Fontan Patients(2017) TURQUETTO, Aida L. R.; CANEO, Luiz F.; AGOSTINHO, Daniela R.; OLIVEIRA, Patricia A.; LOPES, Maria Isabel C. S.; TREVIZAN, Patricia F.; FERNANDES, Frederico L. A.; BINOTTO, Maria A.; LIBERATO, Gabriela; TAVARES, Glaucia M. P.; NEIROTTI, Rodolfo A.; JATENE, Marcelo B.Central factors negatively affect the functional capacity of Fontan patients (FP), but ""non-cardiac"" factors, such as pulmonary function, may contribute to their exercise intolerance. We studied the pulmonary function in asymptomatic FP and its correlations with their functional capacity. Pulmonary function and cardiopulmonary exercise tests were performed in a prospective study of 27 FP and 27 healthy controls (HC). Cardiovascular magnetic resonance was used to evaluate the Fontan circulation. The mean age at tests, the mean age at surgery, and the median follow-up time of FP were 20(+/- 6), 8(+/- 3), and 11(8-17) years, respectively. Dominant ventricle ejection fraction was within normal range. The mean of peak VO2 expressed in absolute values (L/min), the relative values to body weight (mL/kg/min), and their predicted values were lower in FP compared with HC: 1.69 (+/- 0.56) vs 2.81 (+/- 0.77) L/min; 29.9 (+/- 6.1) vs 41.5 (+/- 9.3) mL/kg/min p < 0.001 and predicted VO2 Peak [71% (+/- 14) vs 100% (+/- 20) p < 0.001]. The absolute and predicted values of the forced vital capacity (FVC), forced expiratory volume in one second (FEV1), inspiratory capacity (IC), total lung capacity (TLC), diffusion capacity of carbon monoxide of the lung (DLCO), maximum inspiratory pressure (MIP), and sniff nasal inspiratory pressure (SNIP) were also significantly lower in the Fontan population compared to HC. An increased risk of restrictive ventilatory pattern was found in patients with postural deviations (OD:10.0, IC:1.02-97.5, p = 0.042). There was a strong correlation between pulmonary function and absolute peak VO2 [FVC (r = 0.86, p < 0.001); FEV1 (r = 0.83, p < 0.001); IC (r = 0.84, p < 0.001); TLC (r = 0.79, p < 0.001); and DLCO (r = 0.72, p < 0.001). The strength of the inspiratory muscles in absolute and predicted values was also reduced in FP [-79(+/- 28) vs -109(+/- 44) cmH(2)O (p = 0.004) and 67(+/- 26) vs 89(+/- 36) % (p = 0.016)]. Thus, we concluded that the pulmonary function was impaired in clinically stable Fontan patients and the static and dynamic lung volumes were significantly reduced compared with HC. We also demonstrated a strong correlation between absolute Peak VO2 with the FVC, FEV1, TLC, and DLCO measured by complete pulmonary test.
- Use of Short-term Circulatory Support as a Bridge in Pediatric Heart Transplantation(2015) CANEO, Luiz Fernando; MIANA, Leonardo Augusto; TANAMATI, Carla; PENHA, Juliano Gomes; SHIMODA, Monica Satsuki; AZEKA, Estela; MIURA, Nana; GALAS, Filomena Regina Barbosa Gomes; GUIMARAES, Vanessa Alves; JATENE, Marcelo BiscegliBackground: Heart transplantation is considered the gold standard therapy for the advanced heart failure, but donor shortage, especially in pediatric patients, is the main limitation for this procedure, so most sick patients die while waiting for the procedure. Objective: To evaluate the use of short-term circulatory support as a bridge to transplantation in end-stage cardiomyopathy. Methods: Retrospective clinical study. Between January 2011 and December 2013, 40 patients with cardiomyopathy were admitted in our Pediatric Intensive Care Unit, with a mean age of 4.5 years. Twenty patients evolved during hospitalization with clinical deterioration and were classified as Intermacs 1 and 2. One patient died within 24 hours and 19 could be stabilized and were listed. They were divided into 2 groups: A, clinical support alone and B, implantation of short-term circulatory support as bridge to transplantation additionally to clinical therapy. Results: We used short-term mechanical circulatory support as a bridge to transplantation in 9. In group A (n = 10), eight died waiting and 2 patients (20%) were transplanted, but none was discharged. In group B (n = 9), 6 patients (66.7%) were transplanted and three were discharged. The mean support time was 21,8 days (6 to 984h). The mean transplant waiting list time was 33,8 days. Renal failure and sepsis were the main complication and causeof death in group A while neurologic complications were more prevalent en group B. Conclusion: Mechanical circulatory support increases survival on the pediatric heart transplantation waiting list in patients classified as Intermacs 1 and 2.