RCAAP Repository

INTRODUCTION: The use of plates and screws for more rigid fixation of the sternum, without maintaining contact between the upper portion of the sternum and mediastinum. The present study seeks new choice of plate with a significant difference, the same does not need to be removed in order to proceed to open when necessary sternal emerging opening of the bone. OBJECTIVE: The current study aims to evaluate the efficacy and safety of this procedure. METHODS: To this end, we selected ten patients with coronary artery disease have shown no significant risk factors for mediastinitis. The surgery was thus performed in the usual way that all patients with coronary artery disease surgeries are done at the institution. Only at the time of sternal closure is that there was a change, with the combination of steel wires and plates. RESULTS: All cases had sternal closure properly with good outcome in the medium term. CONCLUSION: The use of plates ENGIMPLAN proved safe and effective for sternal closure.

INTRODUÇÃO: A cirurgia de revascularização do miocárdio muitas vezes é o tratamento de escolha de pacientes que sofrem angina instável. Não sabemos se essa condição acresce morbimortalidade nesse cenário. OBJETIVO: Comparar os desfechos dos pacientes submetidos a cirurgia de revascularização do miocárdio com quadro de angina instável com os pacientes submetidos a cirurgia de revascularização do miocárdio que não apresentaram angina instável. MÉTODOS: Coorte retrospectiva. A angina instável foi definida como síndrome coronariana aguda sem supradesnivelamento de ST e sem alteração enzimática e/ou angina classe IV. RESULTADOS: No período entre fevereiro de 1996 a julho de 2010, de 2.818 a cirurgia de revascularização do miocárdio isoladas realizadas, 1.016 (36,1%) pacientes apresentaram angina instável. A análise multivariada demonstrou que os pacientes com angina instável no pré-operatório utilizaram mais medicações como ácido acetilsalicílico, betabloqueador, heparina (anticoagulação plena), nitrato e menor necessidade de diureticoterapia, do que pacientes sem angina instável. Pacientes com angina instável utilizaram maior monitorização com Swan-Ganz e suporte com balão intra-aórtico do que os pacientes estáveis. Sobre os desfechos, necessitaram de maior tempo de internação (P=0,030) e apresentaram menor taxa de óbito (P=0,018) no pós-operatório de cirurgia de revascularização do miocárdio isolada. CONCLUSÃO: Submeter pacientes a cirurgia de revascularização do miocárdio isolada na vigência de síndrome coronariana aguda como angina instável não elevou a taxa de mortalidade.

Paciente do sexo feminino, 47 anos, admitida com queixa de dispneia aos pequenos esforços como único sintoma. Exames clínico, eletrocardiográfico e de laboratório normais. Radiografia de tórax demonstrou massa em base de hemitórax direito, que a tomografia computadorizada de tórax revelou tratar-se de massa cística bem delimitada, medindo cerca de 11,3 x 10,6 x 10,9 cm, sugerindo o diagnóstico de cisto pericárdico. A paciente foi submetida a toracotomia direita para ressecção do cisto. A paciente evoluiu sem intercorrências. O resultado do exame anatomopatológico, ao contrário do esperado, diagnosticou cisto tímico.

No summary/description provided

INTRODUCTION: Management of aortic root aneurysm or dissection has been the subject of much discussion that has led to some modifications. The current trend is a valve-sparing root replacement. We compared the outcome following valve sparing root repair with Bentall procedure. METHODS: We retrospectively evaluated 70 patients who underwent root replacement for aneurysm or dissection and compared the outcomes of valve-sparing root replacement with those of the Bentall procedure from January 2007 to December 2011 at our institution. RESULTS: Twenty-five patients had valve-sparing aortic root replacement (VSR, including reimplantation or remodeling) (23 males and 2 females), and 45 patients had the Bentall procedure (34 males and 11 females). Patients who underwent a VSR were younger with a mean age of 55.4 ± 14.8 years compared to those who underwent the Bentall procedure with a mean age of 60.6 ± 12.7 (P=ns). The preoperative aortic insufficiency (AI) in the VSR group was moderate in 8 (32%) patients, and severe in 6 (24%). Preoperative creatinine was 1 ± 0.35 mg/dl in the VSR group and 1.1 ± 0.87 mg/dl in the Bentall group. In the VSR group, 3 (12%) patients had emergency surgery; by contrast, in the Bentall group, 8 (17%) patients had emergent surgery. Concomitant coronary artery bypass grafting (excluding coronary reimplantation) was performed in 8 (32%) patients in the VSR group and in 12 (26.6%) patients in the Bentall group (P=0.78); additional valve procedures were performed in 2 (8%) patients in the VSR group and in 11 (24.4%) patients in the Bentall group. The perioperative mortality was 8% (n=2) and 13.3% (n=6), for the VSR and Bentall procedures, respectively (P=0.7, ns). The total duration of intensive care unit stay was 116.6 ± 106 hours for VSR patients and 152.5 ± 218.2 hours for Bentall patients (P=0.5). The overall length of stay in the hospital was 10 ± 8.1 days for VSR and 11 ± 9.52 days for Bentall (P=0.89). The one-year survival was 92% for the VSR group and 79.0% for the Bentall group. The seven-year survival for the VSR group was 92% and 79% for the Bentall group (95% CI [1.215 to 0.1275], P=0.1). CONCLUSION: Aortic valve-sparing root replacement can be performed with acceptable morbidity and mortality with a comparable long-term survival to the Bentall procedure.

INTRODUÇÃO: A fibrilação atrial pós-operatória é a arritmia mais comum em cirurgia cardíaca; estima-se sua incidência entre 20% e 40%. OBJETIVO: Avaliar a incidência de acidente vascular encefálico e insuficiência renal aguda nos pacientes que apresentaram fibrilação atrial no pós-operatório de cirurgia de revascularização miocárdica. MÉTODOS: Estudo coorte longitudinal, bidirecional, realizado no Hospital da Beneficência Portuguesa (SP), com levantamento de prontuários de pacientes submetidos à cirurgia de revascularização miocárdica, de junho de 2009 a julho de 2010. De um total de 3010 pacientes foram retirados 382 pacientes, que apresentavam fibrilação atrial no pré-operatório e/ou cirurgias associadas). O estudo foi conduzido em conformidade com as seguintes resoluções nacionais e internacionais: ICH Harmonized Tripartite Guidelines for Good Clinical Practice - 1996; Resolução CNS196/96; e Declaração de Helsinque. RESULTADOS: Os 2628 pacientes incluídos neste estudo foram divididos em dois grupos: grupo I, que não apresentou fibrilação atrial no pós-operatório, com 2302 (87,6%) pacientes; e grupo II, com 326 (12,4%) que evoluíram com fibrilação atrial no pós-operatório. A incidência de acidente vascular encefálico nos pacientes foi de 1,1% sem fibrilação atrial no pós-operatório vs. 4% com fibrilação atrial no pós-operatório (P<0,001). Insuficiência renal aguda pós-operatória ocorreu em 12% dos pacientes com fibrilação atrial no pós-operatório e 2,4% no grupo sem fibrilação atrial no pós-operatório (P<0,001), ou seja, uma relação 5 vezes maior. CONCLUSÃO: Neste estudo verificou-se alta incidência de acidente vascular encefálico e insuficiência renal aguda nos pacientes com fibrilação atrial no pós-operatório, sendo as taxas maiores que as referidas na literatura.

INTRODUCTION: Biochemical markers of myocardial injury are frequently altered after cardiac surgery. So far there is no evidence whether oral beta-blockers may reduce myocardial injury after coronary artery bypass grafting. OBJECTIVE: To determine if oral administration of prophylactic metoprolol reduces the release of cardiac troponin I in isolated coronary artery bypass grafting, not complicated by new Q waves. METHODS: A prospective randomized study, including 68 patients, divided in 2 groups: Group A (n=33, control) and B (n=35, beta-blockers). In group B, metoprolol tartrate was administered 200 mg/day. The myocardial injury was assessed by troponin I with 1 hour and 12 hours after coronary artery bypass grafting. RESULTS: No significant difference between groups regarding pre-surgical, surgical, complication in intensive care (15% versus 14%, P=0.92) and the total number of hospital events (21% versus 14%, P=0.45) was observed. The median value of troponin I with 12 hours in the study population was 3.3 ng/ml and was lower in group B than in group A (2.5 ng/ml versus 3.7 ng/ml, P<0,05). In the multivariate analysis, the variables that have shown to be independent predictors of troponin I release after 12 hours were: no beta-blockers administration and number of vessels treated. CONCLUSION: The results of this study in uncomplicated coronary artery bypass grafting, comparing the postoperative release of troponin I at 12 hours between the control group and who used oral prophylactic metoprolol for at least 72 hours, allow to conclude that there was less myocardial injury in the betablocker group, giving some degree of myocardial protection.

OBJECTIVE: To compare pressure-support ventilation with spontaneous breathing through a T-tube for interrupting invasive mechanical ventilation in patients undergoing cardiac surgery with cardiopulmonary bypass. METHODS: Adults of both genders were randomly allocated to 30 minutes of either pressure-support ventilation or spontaneous ventilation with "T-tube" before extubation. Manovacuometry, ventilometry and clinical evaluation were performed before the operation, immediately before and after extubation, 1h and 12h after extubation. RESULTS: Twenty-eight patients were studied. There were no deaths or pulmonary complications. The mean aortic clamping time in the pressure support ventilation group was 62 ± 35 minutes and 68 ± 36 minutes in the T-tube group (P=0.651). The mean cardiopulmonary bypass duration in the pressure-support ventilation group was 89 ± 44 minutes and 82 ± 42 minutes in the T-tube group (P=0.75). The mean Tobin index in the pressure support ventilation group was 51 ± 25 and 64.5 ± 23 in the T-tube group (P=0.153). The duration of intensive care unit stay for the pressure support ventilation group was 2.1 ± 0.36 days and 2.3 ± 0.61 days in the T-tube group (P=0.581). The atelectasis score in the T-tube group was 0.6 ± 0.8 and 0.5 ± 0.6 (P=0.979) in the pressure support ventilation group. The study groups did not differ significantly in manovacuometric and ventilometric parameters and hospital evolution. CONCLUSION: The two trial methods evaluated for interruption of mechanical ventilation did not affect the postoperative course of patients who underwent cardiac operations with cardiopulmonary bypass.

INTRODUCTION: In vitro hydrodynamic characterization of prosthetic heart valves provides important information regarding their operation, especially if performed by noninvasive techniques of anemometry. Once velocity profiles for each valve are provided, it is possible to compare them in terms of hydrodynamic performance. In this first experimental study using laser doppler anemometry with mechanical valves, the simulations were performed at a steady flow workbench. OBJECTIVE: To compare unidimensional velocity profiles at the central plane of two bi-leaflet aortic prosthesis from St. Jude (AGN 21 - 751 and 21 AJ - 501 models) exposed to a steady flow regime, on four distinct sections, three downstream and one upstream. METHODS: To provide similar conditions for the flow through each prosthesis by a steady flow workbench (water, flow rate of 17L/min.) and, for the same sections and sweeps, to obtain the velocity profiles of each heart valve by unidimensional measurements. RESULTS: It was found that higher velocities correspond to the prosthesis with smaller inner diameter and instabilities of flow are larger as the section of interest is closer to the valve. Regions of recirculation, stagnation of flow, low pressure, and flow peak velocities were also found. CONCLUSIONS: Considering the hydrodynamic aspect and for every section measured, it could be concluded that the prosthesis model AGN 21 - 751 (RegentTM) is superior to the 21 AJ - 501 model (Master Series). Based on the results, future studies can choose to focus on specific regions of the these valves.

INTRODUCTION: The heart transplant became a consecrated therapy for patients with terminal heart failure, increasingly improving the survival. OBJECTIVE: To identify the medium-term results in patients undergoing cardiac transplantation. METHODS: This is a descriptive, documentary and retrospective study, using a quantitative approach, developed in a Unit of Transplant and Heart Failure, of a tertiary level public hospital, located in Fortaleza, CE, Brazil. The data were obtained from a sample of 188 patients (154 men and 34 women), submitted to the heart transplant, in the period from October 1997 to March 2011. There were calculated survival rates based on Kaplan-Meier methods. RESULTS: There were identified information about the patient's gender (male 81.91%), medical diagnosis which determined the heart transplantation (idiopathic cardiomyopathies 23.98%, ischemic 23.4% and Chagasic 17.02%). The median age of patients was 48 years old (interquartile range = 17.25 years) and the median observation period was 877 days. During this period, 78 patients died, resulting in survival ratios of 72%, 59% and 47% after 1, 5 and 9 years of cardiac transplantation, respectively. Younger patients had longer survival (P=0.0418). CONCLUSION: The medium-term survival of patients undergoing cardiac transplantation is significant, especially for younger patients.

OBJETIVO: Avaliar a influência do comprimento cabeça-nádega e do índice de massa corporal na avaliação ultrassonográfica do coração fetal, pelas vias abdominal e vaginal, no primeiro trimestre de gestação. MÉTODOS: Realizou-se um estudo de corte transversal com 57 gestantes normais entre 12 a 14 semanas (CCN < 84 mm). Foram avaliados os seguintes planos cardíacos, pelas vias abdominal e vaginal: quatro câmaras, via de saída do ventrículo direito, via de saída do ventrículo esquerdo e arco aórtico. Utilizou-se o modo B, Doppler colorido e ultrassonografia de quarta dimensão (spatio-temporal image correlation). Para avaliar a influência do comprimento cabeça-nádega e índice de massa corporal na avaliação dos planos cardíacos fetal, utilizou-se o teste t não-pareado. RESULTADOS: Não se observou diferenças estaticamente significativas nas taxas de sucesso e insucesso entre as vias abdominal e vaginal em relação ao índice de massa corporal, contudo, observou-se maior taxa de insucesso na avaliação vaginal utilizando o modo B associado ao Doppler colorido (P<0,01). CONCLUSÃO: O índice de massa corporal e o comprimento cabeça-nádega não tiveram interferência na avaliação cardíaca fetal no primeiro trimestre de gestação.

OBJETIVO: O aumento da atividade miocárdica da Glicose 6-Fosfato Desidrogenase tem sido demonstrado na insuficiência cardíaca. Este estudo avalia a atividade miocárdica da Glicose 6-Fosfato Desidrogenase no treinamento do ventrículo subpulmonar de cabras adultas. MÉTODOS: Foram utilizadas 18 cabras adultas, divididas em três grupos: convencional (bandagem fixa), sham e intermitente (bandagem ajustável; 12 horas diárias de sobrecarga). A sobrecarga sistólica (70% da pressão sistêmica) foi mantida durante quatro semanas. As avaliações hemodinâmica e ecocardiográfica foram realizadas durante todo o estudo. Depois de cumprido o protocolo, os animais foram mortos para avaliação morfológica e da atividade da Glicose 6-Fosfato Desidrogenase dos ventrículos. RESULTADOS: Apesar de haver sobrecarga sistólica proporcionalmente menor no ventrículo subpulmonar do grupo intermitente (P=0,001), ambos os grupos de estudo apresentaram aumento da massa muscular de magnitude similar. Os grupos intermitente e convencional apresentaram aumento da massa de 55,7% e 36,7% (P<0,05), respectivamente, em comparação ao grupo sham. O conteúdo de água do miocárdio não variou entre os grupos estudados (P=0,27). O ecocardiograma demonstrou maior aumento (37,2%) na espessura do ventrículo subpulmonar do grupo intermitente, em relação aos grupos sham e convencional (P<0,05). Foi observada maior atividade da Glicose 6-Fosfato Desidrogenase na hipertrofia miocárdica do ventrículo subpulmonar do grupo convencional, comparada aos grupos sham e intermitente (P=0,05). CONCLUSÃO: Ambos os grupos de treinamento ventricular desenvolveram hipertrofia ventricular, a despeito do menor tempo de sobrecarga sistólica no grupo intermitente. A maior atividade de Glicose 6-Fosfato Desidrogenase observada no grupo convencional pode refletir um desequilíbrio redox, com maior produção de fosfato de dinucleotídeo de nicotinamida e adenina e glutationa reduzida, um mecanismo importante da fisiopatologia da insuficiência cardíaca.

INTRODUCTION: Depression during or shortly after hospitalization elevated two to three times the risk of mortality or nonfatal cardiac events, significantly increasing the morbidity and mortality of these patients. OBJECTIVE: To assess the impact of revascularization on symptoms of depression in patients with coronary artery disease. METHODS: A prospective cohort study of 57 patients of both sexes undergoing coronary artery bypass grafting between June 2010 and June 2011. We used the SF-36 to assess quality of life, and the Beck Depression Inventory to detect depressive symptoms, applied preoperatively and six months. RESULTS: The prevalence of patients aged 60-69 years was 22 patients (38.60%), 39 men (68.42%), 26 described themselves as mixed race (45.61%), 16 literate (28.07 %) and 30 married (52.63%). The beck depression inventory score demonstrated increased after revascularization: 15 patients mild (26.32%) at time zero to 17 (29.82%) after. And with moderate, seven patients (12.28%) before and 10 (17.54%) after. In the categories of individuals with decreased minimum degree of 32 (56.14%) to 28 (49.12%), and severe of three (5.26%) for two (3.51%) patients. Association was observed between beck depression inventory, gender, age, lifestyle, comorbidities and quality of life. CONCLUSION: There was a high prevalence of elevated beck depression inventory scores, lowest scores of depressive symptoms among men and association between the improvement of quality of life scores and beck depression inventory.

OBJECTIVE: Since twenty-four-hour imaging by Tl-201 myocardial perfusion scintigraphy has been introduced as an effective additional procedure, the aim of this study was to compare this method's result with only rest redistribution procedure in the diagnosis of myocardial viability. METHODS: Thirty patients (Seven female, 23 male; mean: 59.8 ± 10.7, 55.8-63.8 years old) with diagnosis of coronary artery disease were involved in this study. All patients had anamnesis of previous myocardial infarction and/or total occlusion of any main artery in the coronary angiography. Myocardial perfusion scintigraphy with Tl-201 with rest four hour (early) redistribution and 24 hour delayed redistribution protocol were performed to all of the patients. The images were evaluated according to 17 segment basis by an experienced nuclear medicine physician and improvement of a segment by visual interpretation was considered as viable myocardial tissue. RESULTS: Viability was found at 52 segments in the early redistribution images and additional 18 segments in the 24 hour delayed redistribution images on segment basis in the evaluation of 510 segments of 30 patients. On per patient basis, among the 26 patients who had viable tissue, 14 (54%) had additional improvement in 24 hour delayed images. Three (12%) patients had viable tissue in only 24 hour delayed images. CONCLUSION: Delayed imaging in Tl-201 MPS is a necessary application for the evaluation of viable tissue according to considerable number of patients with additional improvement in 24 hour images in our study, which is restricted to the patients with myocardial infarct.

OBJECTIVE: To identify clinical and echocardiographic indicators of the necessity for early surgical closure of patent ductus arteriosus in preterm neonates. METHODS: The prospective study was conducted at the Neonatal Unit of Hospital Municipal Odilon Behrens between 2006 and 2010. The study population comprised 115 preterm neonates diagnosed with patent ductus arteriosus in the first week after birth, of whom 55 (group S) were submitted to clinical and or surgical closure and 60 (group NS) received non-surgical treatment. The parameters analyzed were birth weight, diameter of the ductus arteriosus (DAD), left atrial-to-aortic root diameter ratio (LA:Ao), the quotient of DAD² and birth weight (mm²/kg), and ductal shunting. RESULTS: The study population comprised 58 males and 57 females. The average birth weight of group S (924 ± 224.3 g) was significantly (P=0.049) lower than that of group NS (1012.3 ± 242.8 g). The probability of the preterm neonates being submitted to surgical closure was 62.1% (P=0.006) when the DAD2/birth weight index was &gt; 5 mm²/kg, 72.2% (P=0.001) when the LA:Ao ratio was &gt; 1.5, and 61.2% when ductal shunting was high (P=0.025). CONCLUSION: The parameters DAD²/birth weight index &gt; 5 mm²/kg, LA:Ao ratio &gt; 1.5 and high ductal shunting were statistically significant indicators (P<0.05) of the need for surgical closure of patent ductus arteriosus in low birth weight preterm neonates. Moreover, when an LA:Ao ratio &gt; 1.5 was associated with the occurrence of shock, the probability of surgical closure increased to 78.4%.

INTRODUÇÃO: Transfusões de uma ou mais unidades de concentrado de hemácias é estratégia amplamente utilizada em cirurgia cardíaca, mesmo após várias evidências de aumento de morbimortalidade. A escassez de sangue no mundo também já é evidente. OBJETIVO: Avaliar se o risco de mortalidade é dose-dependente do número de unidades de concentrado de hemácias transfundidas após cirurgia de revascularização miocárdica. MÉTODOS: Entre junho 2009 e julho 2010, foram analisados 3010 pacientes: transfundidos e não transfundidos. Pacientes hemotransfundidos foram divididos em seis grupos conforme receberam uma, duas, três, quatro, cinco e seis ou mais unidades concentrado de hemácias e, após um ano da cirurgia de revascularização miocárdica, avaliamos o risco de mortalidade em cada grupo. Para obtenção do odds ratio foi utilizado modelo de regressão logística multivariado. RESULTADOS: Transfusão crescente de unidades de concentrado de hemácias resulta em risco também crescente de mortalidade, evidenciando uma relação dose-reposta. Os valores do odds ratio aumentam com o acréscimo do número de unidades de hemácias alogênicas transfundidas. O risco de ocorrência de óbitos pelo odds ratio bruto foi 1,42 (P=0,165); 1,94 (P=0,005); 4,17; 4,22; 8,70, 33,33 (P<0,001) e o risco de mortalidade pelo odds ratio ajustado foi 1,22 (P=0,43); 1,52 (P=0,08); 2,85; 2,86; 4,91 e 17,61 (P<0,001), conforme receberam transfusão de uma, duas, três, quatro, cinco, seis ou mais unidades concentrado de hemácias, respectivamente. CONCLUSÃO: O risco de mortalidade é diretamente proporcional ao número de unidades de concentrado de hemácias transfundidas em cirurgia de revascularização miocárdica. Quanto mais sangue alogênico transfundido, maior o risco de mortalidade. A prática transfusional atual precisa ser reavaliada.

OBJECTIVE: To associate the pre- and intraoperative variables with postoperative complications of patients undergoing coronary artery bypass graft surgery. METHODS: The pre- and intraoperative risk factors of individuals of both genders with diagnosis of coronary insufficiency undergoing coronary artery bypass graft have been studied. RESULTS: Fifty-eight individuals with median age 62 ± 10 year-old were included in the study, 67% of whom were male. Fourteen (24.1%) patients were smokers, 39 (67.2%) had previous myocardial infarction history, 11 (19%) had undergone coronary angioplasty, 74% had hypertension, 27% had diabetes mellitus, 64% had dyslipidemia and 15.5% had chronic obstructive pulmonary disease. Eighteen (31%) patients presented postoperative complications, most frequent being: infection in surgical incision, difficulties in deambulation, dyspnea, urinary infection and generalized weakness. Male patients had fewer complications than females (P=0.005). Patients with chronic obstructive pulmonary disease remained hospitalized for longer time periods (P=0.019). Postoperative complications occurred in 50% of the patients with creatinine increased, while only 27.1% of the patients with normal value of creatinine had complications (P=0.049). In addition, complications occurred in 50% of the patients with diabetes mellitus, while only 23.8% of patients without diabetes mellitus had complications (P=0.032). The intraoperative factors showed no statistically significant differences. CONCLUSION: The preoperative factors are associated with postoperative complications in patients undergoing coronary artery bypass graft surgery.

INTRODUCTION: Myocardial preservation during open heart surgeries and harvesting for transplant are of great importance. The heart at the end of procedure has to resume its functions as soon as possible. All cardioplegic solutions are based on potassium for induction of cardioplegic arrest. OBJECTIVE: To assess a cardioplegic solution with no potassium addition to the formula with two other commercially available cardioplegic solutions. The comparative assessment was based on cytotoxicity, adenosine triphosphate myocardial preservation, and caspase 3 activity. The tested solution (LIRM) uses low doses of sodium channel blocker (lidocaine), potassium channel opener (cromakalin), and actin/myosin cross bridge inhibitor (2,3-butanedione monoxime). METHODS: Wistar rats underwent thoracotomy under mechanical ventilation and three different solutions were used for "in situ" perfusion for cardioplegic arrest induction: Custodiol (HTK), Braile (G/A), and LIRM solutions. After cardiac arrest, the hearts were excised and kept in cold storage for 4 hours. After this period, the hearts were assessed with optical light microscopy, myocardial ATP content and caspase 3 activity. All three solutions were evaluated for direct cytotoxicity with L929 and WEHI-164 cells. RESULTS: The ATP content was higher in the Custodiol group compared to two other solutions (P<0.05). The caspase activity was lower in the HTK group compared to LIRM and G/A solutions (P<0.01). The LIRM solution showed lower caspase activity compared to Braile solution (P<0.01). All solutions showed no cytotoxicity effect after 24 hours of cells exposure to cardioplegic solutions. CONCLUSION: Cardioplegia solutions without potassium are promised and aminoacid addition might be an interesting strategy. More evaluation is necessary for an optimal cardioplegic solution development.

A proposta da revascularização do miocárdio sem emprego da circulação extracorpórea visa à diminuição da morbimortalidade decorrente dos potenciais efeitos deletérios da circulação extracorpórea. Todavia, embora a maioria dos estudos demonstre que a revascularização sem circulação extracorpórea é factível e forneça resultados similares à operação com circulação extracorpórea, no que se refere à morbimortalidade hospitalar, e pode mesmo diminuir a incidência de alguns eventos, sua eficácia a médio e longo prazo tem sido questionada. Alguns estudos demonstram menor sobrevida em pacientes submetidos à revascularização do miocárdio sem circulação extracorpórea, levantando a hipótese de que a revascularização incompleta e/ou a pior evolução dos enxertos realizados na operação sem circulação extracorpórea em comparação à operação com circulação extracorpórea, observadas em alguns estudos, seriam responsáveis por essa evolução desfavorável.

The study aimed to analyze the available evidence in the literature on nursing care in the hospital post-cardiac surgery. Data were collected from electronic databases LILACS, SciELO, MEDLINE, via DeCS thoracic surgery, hospital, nursing care, in the period 2001 to 2011. Ten articles were selected that showed the need to develop a plan of nursing discharge focusing on prevention of complications and coping with physical limitations resulting from heart surgery. Thus, the discharge should be considered from the time of admission, with carefully planned actions involving patient and family.