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2.
Am J Transplant ; 2019 Dec 13.
Artigo em Inglês | MEDLINE | ID: mdl-31834977

RESUMO

Epipericardial fat necrosis is an uncommon clinical condition of unknown etiology. It typically presents as acute pleuritic chest pain and should be differentiated from acute pulmonary embolism and acute coronary syndrome. This condition is diagnosed by characteristic chest computed tomography findings of an ovoid mediastinal fatty lesion with intrinsic and surrounding soft-tissue stranding. Treatment of epipericardial fat necrosis includes the administration of anti-inflammatory agents, and symptoms usually resolve within a few days after treatment initiation. This disease entity has rarely been reported since it was first described in 1957. Most current knowledge of epipericardial fat necrosis is based on case reports that describe this condition in previously healthy individuals. We present the case of a 39-year-old woman with a history of heart transplant, who presented with chest pain secondary to epipericardial fat necrosis. Serial computed tomography revealed lesion resolution after appropriate treatment.

3.
Transplantation ; 2019 Aug 08.
Artigo em Inglês | MEDLINE | ID: mdl-31403557

RESUMO

BACKGROUND: Data on the prevention of fractures after heart transplant (HTx) are controversial in the literature. Understanding the effects of HTx on bone may guide appropriate treatments in this high-risk population. METHODS: Seventy adult HTx patients were followed for 12 months. Clinical and laboratory parameters, bone mineral density (BMD), microarchitecture and vertebral fractures were assessed at baseline (after intensive care unit discharge) and at 6 and 12 months. Patients received recommendations regarding calcium intake and vitamin D supplementation after HTx. RESULTS: At baseline, 27% of patients had osteoporosis, associated with the length of hospitalization before HTx (p=0.001). BMD decreased in the first 6 months, with partial recovery later. Bone microarchitecture deteriorated, mainly in the trabecular bone in the first 6 months and cortical bone in the subsequent 6 months. At baseline, 92.9% of patients had vitamin D levels <30 ng/mL and 20.0% <10 ng/mL. Patients also had calcium at the lower limit of normal, high alkaline phosphatase, and high bone resorption biomarker. These abnormalities were suggestive of impaired bone mineralization and normalized at 6 months with correction of vitamin D deficiency. The majority of vertebral fractures were identified at baseline (23% of patients). After multivariate analyses, only a lower fat mass persisted as a risk factor for vertebral fractures (OR 1.23, 95% CI 1.04-1.47, p=0.012). CONCLUSIONS: High frequencies of densitometric osteoporosis, vitamin D deficiency, bone markers abnormalities and vertebral fractures were observed shortly after HTx. Calcium and vitamin D supplementation should be the first step in correcting bone mineralization impairment before specific osteoporosis treatment.

4.
J Card Surg ; 34(7): 638-640, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31212360

RESUMO

A The coronary artery bypass graft (CABG) is common. Sometimes can be challenging. Here we present a 79-year-old man presented with unstable angina and simultaneous activelower gastrointestinal bleeding (hemoglobin level, 5.1 g/L) due to actinic rectitis after radiation therapy for prostate carcinoma performed 1 year previously. Coronary angiography showed marked stenosis of the left anterior descending artery. Antiplatelet aggregation therapy, such as percutaneous coronary intervention or systemic heparin therapy for coronary artery bypass, was not feasible owing to the active rectal bleeding. Therefore, off-pump CABG has performed without systemic heparin therapy and the patient recovered well. For specific cases, CABG without systemic heparin therapy can be safely performed.


Assuntos
Ponte de Artéria Coronária sem Circulação Extracorpórea/métodos , Hemorragia Gastrointestinal/complicações , Infarto do Miocárdio/cirurgia , Doenças Retais/complicações , Idoso , Heparina , Humanos , Masculino , Infarto do Miocárdio/complicações , Resultado do Tratamento
5.
Clin Neurophysiol ; 130(1): 101-108, 2019 01.
Artigo em Inglês | MEDLINE | ID: mdl-30503909

RESUMO

OBJECTIVE: We investigated the potential association of cerebral autoregulation (CA) with postoperative delirium (PD), a common complication of cardiac surgery with cardiopulmonary bypass (CPB). METHODS: In patients undergoing coronary artery bypass graft (CABG) surgery with CPB, cerebral blood flow velocity (CBFV) and blood pressure (BP) were continuously recorded during 5-min preoperatively (T1), after 24 h (T2), and 7 days after procedure (T3). Prospective multivariate logistic regression analysis was performed to determine the independent risk factors of PD. Autoregulation index (ARI) was calculated from the CBFV response to a step change in BP derived by transfer function analysis. RESULTS: In 67 patients, mean age 64.3 ±â€¯9.5 years, CA was depressed at T2 as shown by values of ARI (3.9 ±â€¯1.7), compared to T1 (5.6 ±â€¯1.7) and T3 (5.5 ±â€¯1.8) (p < 0.001). Impaired CA was found in 37 (55%) patients at T2 and in 7 patients (20%) at T3. Lower ARI at T1 and T2 were predictors of PD (p = 0.003). CONCLUSION: Dynamic CA was impaired after CABG surgery with CPB and was a significant independent risk factor of PD. SIGNIFICANCE: Assessment of CA before and after surgery could have considerable potential for early identification of patients at risk of PD, thus reducing poor outcomes and length of stay. CLINICAL TRIALS REGISTRATION: www.clinicaltrials.gov (NCT02143544, April 30, 2014).


Assuntos
Circulação Cerebrovascular/fisiologia , Ponte de Artéria Coronária/efeitos adversos , Delírio/epidemiologia , Homeostase/fisiologia , Complicações Pós-Operatórias/epidemiologia , Idoso , Ponte de Artéria Coronária/tendências , Delírio/diagnóstico , Delírio/fisiopatologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/diagnóstico , Complicações Pós-Operatórias/fisiopatologia , Estudos Prospectivos
6.
Crit Care Med ; 46(8): e742-e750, 2018 08.
Artigo em Inglês | MEDLINE | ID: mdl-29727370

RESUMO

OBJECTIVES: The aim of this study was to evaluate the efficacy of perioperative intra-aortic balloon pump use in high-risk cardiac surgery patients. DESIGN: A single-center randomized controlled trial and a meta-analysis of randomized controlled trials. SETTING: Heart Institute of São Paulo University. PATIENTS: High-risk patients undergoing elective coronary artery bypass surgery. INTERVENTION: Patients were randomized to receive preskin incision intra-aortic balloon pump insertion after anesthesia induction versus no intra-aortic balloon pump use. MEASUREMENTS AND MAIN RESULTS: The primary outcome was a composite endpoint of 30-day mortality and major morbidity (cardiogenic shock, stroke, acute renal failure, mediastinitis, prolonged mechanical ventilation, and a need for reoperation). A total of 181 patients (mean [SD] age 65.4 [9.4] yr; 32% female) were randomized. The primary outcome was observed in 43 patients (47.8%) in the intra-aortic balloon pump group and 42 patients (46.2%) in the control group (p = 0.46). The median duration of inotrope use (51 hr [interquartile range, 32-94 hr] vs 39 hr [interquartile range, 25-66 hr]; p = 0.007) and the ICU length of stay (5 d [interquartile range, 3-8 d] vs 4 d [interquartile range, 3-6 d]; p = 0.035) were longer in the intra-aortic balloon pump group than in the control group. A meta-analysis of 11 randomized controlled trials confirmed a lack of survival improvement in high-risk cardiac surgery patients with perioperative intra-aortic balloon pump use. CONCLUSIONS: In high-risk patients undergoing cardiac surgery, the perioperative use of an intra-aortic balloon pump did not reduce the occurrence of a composite outcome of 30-day mortality and major complications compared with usual care alone.


Assuntos
Procedimentos Cirúrgicos Cardíacos/mortalidade , Procedimentos Cirúrgicos Cardíacos/métodos , Balão Intra-Aórtico/métodos , Complicações Pós-Operatórias/epidemiologia , Idoso , Cardiotônicos/administração & dosagem , Feminino , Humanos , Unidades de Terapia Intensiva , Tempo de Internação , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/mortalidade , Fatores de Risco , Método Simples-Cego
8.
Thyroid ; 27(5): 738-745, 2017 05.
Artigo em Inglês | MEDLINE | ID: mdl-28095748

RESUMO

OBJECTIVE: The human heart expresses the type 2 deiodinase (D2) that activates thyroxine (T4) to triiodothyronine (T3). At the same time, the inactivating type 3 deiodinase (D3) has been found in a rat model of right ventricular hypertrophy. It is not known whether the human myocardium metabolizes thyroid hormone. This study examined myocardial thyroid hormone metabolism in patients with aortic valve stenosis (AS) undergoing aortic valve replacement and in patients with coronary artery disease (CAD) undergoing coronary artery bypass grafting surgery. METHODS: Myocardial thyroid hormone metabolism was assessed by analyzing the difference in serum thyroid hormone levels between the aortic root (incoming blood) and the coronary sinus (outgoing blood) of patients undergoing cardiac surgery. A total of 23 patients with AS and 35 patients with CAD were included. Patients received a pre-surgical echocardiogram, and pre-, during and post-surgical thyroid hormone serum levels were collected in the myocardial and peripheral circulations. RESULTS: Patients with AS exhibited the expected left ventricle (LV) hypertrophy (i.e., 20-30% increase in LV posterior wall and interventricular septum thickness and ∼10% increase in AS in LV diastolic diameter). Immediately before cardiopulmonary bypass, blood flowing through the AS myocardium exhibited a 4.6% reduction in T3 and 6.9% increase in rT3 levels, decreasing the serum T3/rT3 ratio by 9.6%. T4 and thyrotropin serum levels remained similar between the aortic root and coronary sinus. In contrast, no myocardial thyroid hormone metabolism was observed in CAD patients. Notably, the AS myocardium lost the ability to inactivate thyroid hormone after cardiopulmonary bypass, possibly due to myocardial stunning. CONCLUSIONS: There is accelerated thyroid hormone inactivation in the AS myocardium, which is likely the result of D3 expression. No evidence to suggest thyroid hormone activation in the myocardium was obtained in the present study.


Assuntos
Estenose da Valva Aórtica/metabolismo , Miocárdio/metabolismo , Tri-Iodotironina/sangue , Idoso , Estenose da Valva Aórtica/patologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Miocárdio/patologia
9.
Anesthesiology ; 126(1): 85-93, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-27841822

RESUMO

BACKGROUND: Vasoplegic syndrome is a common complication after cardiac surgery and impacts negatively on patient outcomes. The objective of this study was to evaluate whether vasopressin is superior to norepinephrine in reducing postoperative complications in patients with vasoplegic syndrome. METHODS: This prospective, randomized, double-blind trial was conducted at the Heart Institute, University of Sao Paulo, Sao Paulo, Brazil, between January 2012 and March 2014. Patients with vasoplegic shock (defined as mean arterial pressure less than 65 mmHg resistant to fluid challenge and cardiac index greater than 2.2 l · min · m) after cardiac surgery were randomized to receive vasopressin (0.01 to 0.06 U/min) or norepinephrine (10 to 60 µg/min) to maintain arterial pressure. The primary endpoint was a composite of mortality or severe complications (stroke, requirement for mechanical ventilation for longer than 48 h, deep sternal wound infection, reoperation, or acute renal failure) within 30 days. RESULTS: A total of 330 patients were randomized, and 300 were infused with one of the study drugs (vasopressin, 149; norepinephrine, 151). The primary outcome occurred in 32% of the vasopressin patients and in 49% of the norepinephrine patients (unadjusted hazard ratio, 0.55; 95% CI, 0.38 to 0.80; P = 0.0014). Regarding adverse events, the authors found a lower occurrence of atrial fibrillation in the vasopressin group (63.8% vs. 82.1%; P = 0.0004) and no difference between groups in the rates of digital ischemia, mesenteric ischemia, hyponatremia, and myocardial infarction. CONCLUSIONS: The authors' results suggest that vasopressin can be used as a first-line vasopressor agent in postcardiac surgery vasoplegic shock and improves clinical outcomes.


Assuntos
Procedimentos Cirúrgicos Cardíacos , Norepinefrina/farmacologia , Complicações Pós-Operatórias/tratamento farmacológico , Choque/tratamento farmacológico , Vasoplegia/tratamento farmacológico , Vasopressinas/farmacologia , Brasil , Método Duplo-Cego , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Choque/complicações , Resultado do Tratamento , Vasoconstritores/farmacologia , Vasoplegia/complicações
10.
Crit Care Med ; 44(4): 724-33, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26646462

RESUMO

OBJECTIVES: To evaluate the effects of goal-directed therapy on outcomes in high-risk patients undergoing cardiac surgery. DESIGN: A prospective randomized controlled trial and an updated metaanalysis of randomized trials published from inception up to May 1, 2015. SETTING: Surgical ICU within a tertiary referral university-affiliated teaching hospital. PATIENTS: One hundred twenty-six high-risk patients undergoing coronary artery bypass surgery or valve repair. INTERVENTIONS: Patients were randomized to a cardiac output-guided hemodynamic therapy algorithm (goal-directed therapy group, n = 62) or to usual care (n = 64). In the goal-directed therapy arm, a cardiac index of greater than 3 L/min/m was targeted with IV fluids, inotropes, and RBC transfusion starting from cardiopulmonary bypass and ending 8 hours after arrival to the ICU. MEASUREMENTS AND MAIN RESULTS: The primary outcome was a composite endpoint of 30-day mortality and major postoperative complications. Patients from the goal-directed therapy group received a greater median (interquartile range) volume of IV fluids than the usual care group (1,000 [625-1,500] vs 500 [500-1,000] mL; p < 0.001], with no differences in the administration of either inotropes or RBC transfusions. The primary outcome was reduced in the goal-directed therapy group (27.4% vs 45.3%; p = 0.037). The goal-directed therapy group had a lower occurrence rate of infection (12.9% vs 29.7%; p = 0.002) and low cardiac output syndrome (6.5% vs 26.6%; p = 0.002). We also observed lower ICU cumulative dosage of dobutamine (12 vs 19 mg/kg; p = 0.003) and a shorter ICU (3 [3-4] vs 5 [4-7] d; p < 0.001) and hospital length of stay (9 [8-16] vs 12 [9-22] d; p = 0.049) in the goal-directed therapy compared with the usual care group. There were no differences in 30-day mortality rates (4.8% vs 9.4%, respectively; p = 0.492). The metaanalysis identified six trials and showed that, when compared with standard treatment, goal-directed therapy reduced the overall rate of complications (goal-directed therapy, 47/410 [11%] vs usual care, 92/415 [22%]; odds ratio, 0.40 [95% CI, 0.26-0.63]; p < 0.0001) and decreased the hospital length of stay (mean difference, -5.44 d; 95% CI, -9.28 to -1.60; p = 0.006) with no difference in postoperative mortality: 9 of 410 (2.2%) versus 15 of 415 (3.6%), odds ratio, 0.61 (95% CI, 0.26-1.47), and p = 0.27. CONCLUSIONS: Goal-directed therapy using fluids, inotropes, and blood transfusion reduced 30-day major complications in high-risk patients undergoing cardiac surgery.


Assuntos
Procedimentos Cirúrgicos Cardíacos/métodos , Hemodinâmica/fisiologia , Complicações Pós-Operatórias/prevenção & controle , Agonistas de Receptores Adrenérgicos beta 1/uso terapêutico , Idoso , Idoso de 80 Anos ou mais , Débito Cardíaco , Procedimentos Cirúrgicos Cardíacos/mortalidade , Dobutamina/uso terapêutico , Feminino , Hidratação/métodos , Humanos , Unidades de Terapia Intensiva , Tempo de Internação , Masculino , Metanálise como Assunto , Pessoa de Meia-Idade , Complicações Pós-Operatórias/epidemiologia , Literatura de Revisão como Assunto , Resultado do Tratamento
11.
Ann Thorac Surg ; 97(5): 1617-23, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24657033

RESUMO

BACKGROUND: The renoprotective effect of N-acetylcystein in patients undergoing coronary artery bypass graft surgery is controversial. METHODS: We assessed the renoprotective effect of the highest dose of N-acetylcystein sanctioned for clinical use in a prospective, double-blind, placebo-controlled study including 70 chronic kidney disease patients, stage 3 or 4, who underwent coronary artery bypass graft surgery, on cardiopulmonary bypass (CPB) and off CPB, and were randomly allocated to receive either N-acetylcystein 150 mg/kg followed by 50 mg/kg for 6 hours in 0.9% saline or only 0.9% saline. Acute kidney injury was defined by the Acute Kidney Injury Network classification. RESULTS: The incidence of kidney injury was reduced in the N-acetylcystein group (57.1% versus 28.6%, p=0.016). Nonuse of N-acetylcystein (relative risk 3.58, 95% confidence interval: 1.04 to 12.33, p=0.04) and cardiopulmonary bypass (relative risk 4.55, 95% confidence interval: 1.28 to 16.15, p=0.02) were independent predictors of kidney injury. In patients treated with CPB, N-acetylcystein reduced the incidence of kidney injury from 63% to 46%. Oxidative stress was increased in control subjects (p=0.01) and abolished in patients receiving N-acetylcystein. CONCLUSIONS: Maximum intravenous doses of N-acetylcystein reduce the incidence of acute kidney injury in patients with kidney disease undergoing coronary artery bypass graft surgery, abolish oxidative stress, and mitigate the negative effect of CPB on renal function.


Assuntos
Acetilcisteína/administração & dosagem , Lesão Renal Aguda/prevenção & controle , Ponte de Artéria Coronária/métodos , Estenose Coronária/cirurgia , Falência Renal Crônica/diagnóstico , Pulsoterapia/métodos , Idoso , Ponte Cardiopulmonar/efeitos adversos , Ponte Cardiopulmonar/métodos , Intervalos de Confiança , Ponte de Artéria Coronária/efeitos adversos , Estenose Coronária/complicações , Estenose Coronária/diagnóstico por imagem , Estenose Coronária/mortalidade , Relação Dose-Resposta a Droga , Método Duplo-Cego , Feminino , Mortalidade Hospitalar , Humanos , Falência Renal Crônica/complicações , Falência Renal Crônica/cirurgia , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/prevenção & controle , Prognóstico , Estudos Prospectivos , Radiografia , Valores de Referência , Medição de Risco , Estatísticas não Paramétricas , Taxa de Sobrevida , Resultado do Tratamento
12.
BMC Cardiovasc Disord ; 12: 65, 2012 Aug 16.
Artigo em Inglês | MEDLINE | ID: mdl-22898311

RESUMO

BACKGROUND: 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.


Assuntos
Ponte de Artéria Coronária/efeitos adversos , Doença da Artéria Coronariana/terapia , Creatina Quinase Forma MB/sangue , Cardiopatias/diagnóstico , Imagem Cinética por Ressonância Magnética , Miocárdio , Intervenção Coronária Percutânea/efeitos adversos , Projetos de Pesquisa , Troponina I/sangue , Biomarcadores/sangue , Distribuição de Qui-Quadrado , Ponte de Artéria Coronária sem Circulação Extracorpórea/efeitos adversos , Doença da Artéria Coronariana/sangue , Doença da Artéria Coronariana/patologia , Doença da Artéria Coronariana/cirurgia , Fibrose , Cardiopatias/sangue , Cardiopatias/patologia , Cardiopatias/fisiopatologia , Humanos , Modelos Logísticos , Análise Multivariada , Miocárdio/metabolismo , Miocárdio/patologia , Necrose , Intervenção Coronária Percutânea/instrumentação , Valor Preditivo dos Testes , Estudos Prospectivos , Stents , Volume Sistólico , Fatores de Tempo , Resultado do Tratamento , Regulação para Cima , Disfunção Ventricular Esquerda/diagnóstico , Disfunção Ventricular Esquerda/etiologia , Disfunção Ventricular Esquerda/fisiopatologia , Função Ventricular Esquerda
13.
Rev. med. (Säo Paulo) ; 87(2): 92-98, 2008. ilus
Artigo em Português | LILACS | ID: lil-506454

RESUMO

A doença aterosclerótica cardiovascular é a maior causa de morte tanto no Brasilquanto nos países desenvolvidos, sendo, portanto, um assunto de relevância tanto para profissionais da área de saúde quanto para a população geral. Apresentamos, então, as formasde tratamento da doença, principalmente no enfoque cirúrgico, com a revascularização do miocárdio. Para tanto, iniciamos com um pequeno histórico que nos mostra como se chegouà operação como conhecemos hoje. Discutimos as técnicas atualmente empregadas neste tipo de operação e quando ela é feita com ou sem circulação extra-corpórea; quais são ospacientes com indicação para esse tipo de tratamento e o que se espera dos resultados, quais as perspectivas desse procedimento; e como a prática de cirurgias minimamente invasivas ea utilização da robótica auxiliam o cirurgião. Por fim, contextualizamos dois procedimentos novos: a revascularização percutânea, que ainda apresenta resultados incertos a longo prazo e a neoangiogênese, que é um procedimento em fase de estudo.


The atherosclerotic cardiovascular disease is the greatest cause of death in Brazil as much as in the developed world. Therefore, it’s a relevant issue for health professionals and for general population. So, we present the treatments for the disease, focusing the surgery, with revascularization of the myocardium. Then, we start with a short report that shows how the operation achieves its actual state, the techniques currently applied in this kind of operationand when it’s done with or without extracorporeal circulation; who the patients for this treatment are and what results we can expect; the perspectives for this procedure, such as the practiceof minimally invasive surgeries and the utilization of robotics to help the surgeon. At last, we contextualize two new procedures: the percutaneous revascularization, that still shows uncertain long-term results, and the neoangiogenesis, which still is in study phase.


Assuntos
Isquemia Miocárdica/cirurgia , Procedimentos Cirúrgicos Minimamente Invasivos , Revascularização Miocárdica/tendências
14.
Rev. Soc. Cardiol. Estado de Säo Paulo ; 13(4): 452-463, jul.-ago. 2003. ilus, tab, graf
Artigo em Português | LILACS | ID: lil-394951

RESUMO

A insuficiência mitral funcional nas cardiomiopatias dilatadas ocorre em razão das alterações da geometria do ventrículo esquerdo e dos aparelhos valvar e subvalvar. A sobrecarga de volume decorrente da insuficiência mitral resulta no aumento progressivo da cavidade ventricular e do anel mitral, agravando a disfunção ventricular. O objetivo deste trabalho é estudar o resultado da substituição valvar mitral associado ao remodelamento ventricular nesse grupo de pacientes. No período de julho de 2000 a fevereiro de 2003, 20 pacientes consecutivos portadores de insuficiência mitral funcional (classe funcional III e IV) e cardiomiopatia dilatada idiopática foram submetidos a troca da valva mitral associada ao remodelamento ventricular esquerdo. Foram avaliados segundo as alterações hemodinâmicas e ecocardiográficas e quanto à evolução clínica. A análise estatística foi obtida por meio do teste t de Student e a análise de sobrevida, pelo método de Kaplan-Meyer. A mortalidade hospitalar foi de 10 por cento e a curva atuarial demonstrou sobrevida de 74 por cento + 14,8 por cento aos 30 meses de seguimento; após seguimento médio de 11,2 meses, 82 por cento dos pacientes encontram-se em classe funcional I e II. A avaliação hemodinâmica apresentou melhora do débito e do índice cardíacos (p < 0,00001 para ambos). A avaliação ecocardiográfica demonstrou melhora da fração de ejeção (p = 0,01), redução dos diâmetros sistólico e diastólico final esquerdo (p = 0,0007 e p = 0,03) e redução do volume sistólico final esquerdo (p = 0,03). A troca valvar mitral associada ao remodelamento ventricular foi capaz de reduzir os sintomas, melhorar a qualidade de vida e prolongar a sobrevida desses pacientes.


Assuntos
Humanos , Insuficiência da Valva Mitral/cirurgia , Insuficiência da Valva Mitral/etiologia , Insuficiência da Valva Mitral/patologia , Valva Mitral/cirurgia , Cardiomiopatia Dilatada , Insuficiência Cardíaca , Fatores de Tempo
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