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
3 resultados
Resultados de Busca
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- 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.
- Functional Performance of Different Venous Limb Options in Simulated Neonatal/Pediatric Cardiopulmonary Bypass Circuits(2018) CANEO, Luiz Fernando; MATTE, Gregory S.; GUIMARAES, Daniel Peres; VIOTTO, Guilherme; MAZZETO, Marcelo; CESTARI, Idagene; NEIROTTI, Rodolfo A.; JATENE, Marcelo B.; WANG, Shigang; UNDAR, Akif; CHANG JUNIOR, Joao; JATENE, Fabio B.Objective: Hemodilution is a concern in cardiopulmonary bypass (CPB). Using a smaller dual tubing rather than a single larger inner diameter (ID) tubing in the venous limb to decrease prime volume has been a standard practice. The purpose of this study is to evaluate these tubing options. Methods: Four different CPB circuits primed with blood (hematocrit 30%) were investigated. Two setups were used with two circuits for each one. In Setup I, a neonatal oxygenator was connected to dual 3/16"" ID venous limbs (Circuit A) or to a single 1/4"" ID venous limb (Circuit B); and in Setup II, a pediatric oxygenator was connected to dual 1/4"" ID venous limbs (Circuit C) or a single 3/8"" ID venous limb (Circuit D). Trials were conducted at arterial flow rates of 500 ml/min up to 1500 ml/min (Setup I) and up to 3000 ml/min (Setup II), at 36 degrees C and 28 degrees C. Results: Circuit B exhibited a higher venous flow rate than Circuit A, and Circuit D exhibited a higher venous flow rate than Circuit C, at both temperatures. Flow resistance was significantly higher in Circuits A and C than in Circuits B (P<0.001) and D (P<0.001), respectively. Conclusion: A single 1/4"" venous limb is better than dual 3/16"" venous limbs at all flow rates, up to 1500 ml/min. Moreover, a single 3/8"" venous limb is better than dual 1/4"" venous limbs, up to 3000 ml/min. Our findings strongly suggest a revision of perfusion practice to include single venous limb circuits for CPB.
- Rational Use of Mechanical Circulatory Support as a Bridge to Pediatric and Congenital Heart Transplantation(2018) MIANA, Leonardo A.; SILVA, Guilherme Viotto Rodrigues da; CANEO, Luiz Fernando; TURQUETTO, Aida Luisa; TANAMATI, Carla; FORONDA, Gustavo; MASSOTI, Maria Raquel; PENHA, Juliano G.; AZEKA, Estela; GALAS, Filomena R. B. G.; JATENE, Fabio B.; JATENE, Marcelo B.Introduction: Donor shortage and organ allocation is the main problem in pediatric heart transplant. Mechanical circulatory support is known to increase waiting list survival, but it is not routinely used in pediatric programs in Latin America. Methods: All patients listed for heart transplant and supported by a mechanical circulatory support between January 2012 and March 2016 were included in this retrospective single-center study. The endpoints were mechanical circulatory support time, complications, heart transplant survival and discharge from the hospital. Results: Twenty-nine patients from our waiting list were assessed. Twelve (45%) patients were initially supported by extracorporeal membrane oxygenation (ECMO) and a centrifugal pump was implanted in 17 (55%) patients. Five patients initially supported by ECMO were bridged to another device. One was bridged to a centrifugal pump and four were bridged to Berlin Heart Excor (R). Among the 29 supported patients, 18 (62%) managed to have a heart transplant. Thirty-day survival period after heart transplant was 56% (10 patients). Median support duration was 12 days (interquartile range [IQR] 4-26 days) per run and the waiting time for heart transplant was 9.5 days (IQR 2.5-25 days). Acute kidney injury was identified as a mortality predictor (OR=22.6 [CI=1.04-494.6]; P=0.04). Conclusion: Mechanical circulatory support was able to bridge most INTERMACS 1 and 2 pediatric patients to transplant with an acceptable complication rate. Acute renal failure increased mortality after mechanical circulatory support in our experience.