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Avaliação cardíaca com cintilografia com 123 I-mlBG e ventriculografia radioisotópica em pacientes submetidos à quimioterapia com antraciclinas na infância e adolescência / Cardiac scintigraphy evaluation with 123I-mIBG and radionuclide ventriculography in patients undergoing anthracycline chemotherapy in childhood and adolescence
São Paulo; s.n; 2015. [141] p. ilus, graf, tab.
Thesis in Portuguese | LILACS | ID: biblio-870951
Responsible library: BR66.1
Localization: BR66.1
RESUMO

INTRODUÇÃO:

O câncer infantil é a primeira causa de morte em crianças, nos países desenvolvidos. Nos últimos 40 anos, graças ao desenvolvimento da Oncopediatria e de drogas como as antraciclinas (ATC), a taxa de cura tem atingido até 80%. Isto repercutiu em significativo aumento da sobrevida e, consequentemente, nos efeitos deletérios da quimioterapia com ATC, como a cardiotoxicidade. A fim de estudar os efeitos tardios da quimioterapia com ATC sobre o sistema nervoso cardíaco simpático (SNS), foi realizado estudo de cintilografia com 123I-mIBG (meta-iodobenzilguanedina ligado ao iodo123) e comparado com dose dos ATCs e fração de ejeção do ventrículo esquerdo (FEVE), através da ventriculografia radioisotópica (VR). As variáveis analisadas pela cintilografia com 123I-mIBG foram a relação coração/mediastino (C/M) e a taxa de clareamento (TC) que sinalizam o funcionamento neuronal cardíaco.

MÉTODOS:

realizado estudo transversal de pacientes assintomáticos submetidos à quimioterapia com ATC na infância e adolescência, com período de 2 a 21 anos, após o término do tratamento, e com ecocardiograma (ECO) normal. Dos 118 pacientes participantes recrutados, 27 foram excluídos (motivos radioterapia torácica, desistência e uso de cardioprotetores). Os dados clínicos e patológicos dos 91 pacientes participantes foram coletados dos prontuários ou através de anamnese. Simultaneamente foi estudado um grupo controle (40 voluntários), e, com as avaliações de imagens com 123I-mIBG e VR, foi preenchida uma ficha de coleta padronizada previamente elaborada e digitada em banco de dados no Software IBM® SPSS® Statistics 20.0.1 for Windows, para posterior análise. Os achados dos pacientes foram analisados e comparados aos do grupo controle.

RESULTADOS:

Neste grupo, a média de acúmulo da 123I-mIBG - 3,5h, avaliada pela relação C/M, foi de 2,23 com IC [95%] (2,17-2,29). A média da TC foi de 10,27% com IC [95%] (7,52-13,03). Para ambas as informações, os valores apresentaram-se...
ABSTRACT

INTRODUCTION:

Child cancer is the first cause of children's death in developed countries. In the last 40 years, thanks to the development of the pediatric oncology and drugs like the Anthracyclines (ATC), cure rate has reached up to 80%. This reflected a significant improvement in survival and as a consequence the deleterious effects from chemotherapy, like cardiotoxicity, has emerged. In order to study the later effects of the chemotherapy with ATC on the sympathetic nervous system (SNS) cardiac 123I-mIBG (123Imetaiodobenzylguanidine) scintigraphy was performed and compared to the left ventricle ejection fraction (LVEF), through radionuclide ventriculography (RV). The variables analized by the 123I-mIBG scintigraphy were the heart/mediastinum ratio (H/M) and the washout rate (WR).

METHODS:

This is a transversal study of asymptomatic patients undergoing ATC chemotherapy in childhood and adolescence, ages varying from 2 to 21 years after the end of the treatment and normal echocardiogram (ECO). From the 118 recruted participant subjects, 27 were excluded ( thoracic radiotherapy, abandonment and use of cardioprotectors). The clinical and pathological data from the 91 patients were collected from medical records or clinical history. A control group of 40 healthy volunteers(28 male, 14 females; ages varying from 3 to 36) was studied simultaneously and evaluated as well with 123I-mIBG and RV. All data collected were stored in a databank for later analysis, patients findings versus control group.

RESULTS:

In the patient group the average H/M ratio from the late 123I-mIBG image was 2,23 with CI [95%] (2,17-2,29), and average WR was 10,27% with CI [95%] (7,52-13,03). The control group had the H/M ratio of 2,26 with CI [95%] (2,18-2,34) and the WR rate of 9,64% with CI [95%] (5,76-13,52). The comparison between groups was not significant. However, it has to be highlighted that 6,6% of all the patients had abnormal H/M values which were...
Subject(s)
Full text: Available Collection: International databases Health context: SDG3 - Health and Well-Being / SDG3 - Target 3.2 Reduce avoidable death in newborns and children under 5 Health problem: Target 3.2: Reduce avoidable death in newborns and children under 5 / Noncommunicable Diseases Database: LILACS Main subject: Radionuclide Ventriculography / Child / Adolescent / Anthracyclines / Cardiotoxins / Neoplasms Type of study: Observational study / Prevalence study Limits: Adolescent / Child / Child, preschool / Female / Humans / Male Language: Portuguese Year: 2015 Document type: Thesis
Full text: Available Collection: International databases Health context: SDG3 - Health and Well-Being / SDG3 - Target 3.2 Reduce avoidable death in newborns and children under 5 Health problem: Target 3.2: Reduce avoidable death in newborns and children under 5 / Noncommunicable Diseases Database: LILACS Main subject: Radionuclide Ventriculography / Child / Adolescent / Anthracyclines / Cardiotoxins / Neoplasms Type of study: Observational study / Prevalence study Limits: Adolescent / Child / Child, preschool / Female / Humans / Male Language: Portuguese Year: 2015 Document type: Thesis
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