Avaliação da função miocárdica de pacientes com síndrome mielodisplásica pelo ecocardiograma convencional com doppler e pelas novas técnicas de doppler tecidual e speckle-tracking

• Ano de defesa: 2012
• Autor(a) principal: Castro, Cláudio César Monteiro de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Síndromes Mielodisplásicas; Ecocardiografia Doppler
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/6885

Myelodysplastic syndrome is a clonal disorder of hematopoietic tissue highly prevalent on elderly Anemia is one of most striking feature of this disorder Patients with transfusional dependence have a poor prognosis Following complications related to the own illness cardiovascular complications are the leading cause of death New echocardiographic techniques such as Tissue Doppler and speckle-tracking may be useful on assessment of the myocardial function in these patients A group with 34 patients and 14 healthy controls matched by sex and age was subjected to conventional echocardiography Tissue Doppler and assessment of myocardial deformation (strain) Patients were divided between those with (13) or without (21) transfusional dependence and compared to controls In the group of transfusional dependence there were 10 subjects with iron overload (serum ferritin levels > 1.000 ng/mL) Those with transfusion dependence had bigger left systolic and diastolic ventricular volumes than controls (p = 0,047 and 0,039) The indexed left atrium volume was larger on those with transfusion dependence compared to controls (p = 0,003) The left ventricular diastolic function assessed by tissue and conventional Doppler (E/A and E/E’ ratios) was normal in the patient group and has not difference between them (p = 0,15 and 0,9) On the assessment of the systolic left ventricular function by ejection fraction and myocardial deformation (global longitudinal strain) there was no difference between groups or from reference values (p = 0,71 and 0,097) The interventricular septum thickness was larger in the group with serum ferritin > 1.000 ng/mL than patients with ferritin < 1.000 ng/mL (p = 0,012) The hemoglobin level but not ferritin showed linear correlation with the left volumes (atrium: r = -0,53 with p =0,013 / ventricle: r = -0,4 with p = 0,019) Our sample doesn’t show diastolic nor systolic global dysfunctions yet with new techniques of tissue Doppler and myocardial deformation (strain). Hemoglobin below 8 g/dL was an early marker of worst ventricular function in our patients with myelodysplastic syndrome