RESUMO
The aim of the study was to evaluate the liver blood flow at different stages of hepatitis B as compared with prehepatic block. The examination was performed on 79 children aged 1-17 years who were divided in two groups. Group 1 consisted of 20 children with HBV chronic active hepatitis B: 10 children with liver efficiency (Gr. 1A) and 10 with liver cirrhosis (intrahepatic block) Gr. 1B. Group 2 comprised 59 children with prehepatic block. The liver blood flow was assessed with the help of a radioisotope liver scintiscan by the first flow technique using 99mTc-DTPA. The ratio of portal to total liver blood flow (HPI) and time of portal blood flow (T1/2) were estimated. In children from group 1A the HPI mean was 57% (N over 75%) and T1/2 was 7-8 sec (N4-7 sec) depending on age. In Group 1B the HPI mean was 25% and T1/2 was 9-13 sec. In most of the children with prehepatic block HPI was low (mean 22%) and was similar to that in children with cirrhosis due to HBV. The arterial blood flow increased while HPI showed a distinct decrease.
Assuntos
Hepatite B/fisiopatologia , Hepatite Crônica/fisiopatologia , Hipertensão Portal/fisiopatologia , Circulação Hepática/fisiologia , Cirrose Hepática/fisiopatologia , Adolescente , Criança , Pré-Escolar , Estudos de Avaliação como Assunto , Humanos , LactenteAssuntos
Doença das Coronárias/diagnóstico por imagem , Tálio , Adulto , Idoso , Feminino , Humanos , Masculino , Métodos , Pessoa de Meia-Idade , Radioisótopos , CintilografiaAssuntos
Ventrículos do Coração/diagnóstico por imagem , Infarto do Miocárdio/diagnóstico por imagem , Adulto , Idoso , Computadores , Ventrículos do Coração/fisiopatologia , Humanos , Pessoa de Meia-Idade , Infarto do Miocárdio/fisiopatologia , Cintilografia , Volume Sistólico , Tecnologia RadiológicaRESUMO
The investigations were carried out in 51 patients with different cardiovascular diseases using a gamma camera coupled to a computer. Pyrophosphate (Sn) injection followed by technetium-99m injection were administered through only one puncture of an antecubital vein. Tc-99m was given as a bolus and its passage through the cardiac cavities was recorded and ejection fraction and wall motion of left ventricle were estimated. It was observed that 10-30 min after Tc-99m injection a steady activity Tc-99m-labeled RBCs was maintained in the vascular bed which made possible evaluation of the motility of cardiac walls by the gating technique. Presence of labeled RBCs also permitted blood pool scans and spleen scans to be obtained. Cases investigated by this method for pericardial effusion and splenomegaly are described for illustration.
