Alfatalaasemia Flashcards

1
Q

Hidropsia fetal - gene

A

4 deleções

_ _ / _ _

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2
Q

Doença da HbH - gene

A

3 deleções

a _/ _ _

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3
Q

Alfatalassemia minor - gene

A

2 deleções
a a /_ _ heterozigoto a0
a_/a_ homozigoto a +

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4
Q

Carreador assintomático - gene

A

a a /a _

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5
Q

Hidropsia fetal - fisiopato

A

HbF - a2y2
Ausencia se cadeia alfa -> sobra y -> se juntam e formam o tetramero y4 (Hb Barts)
Hb Barts é mto avida por 02, nao permitindo entrega de 02 para os tecidos

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6
Q

Hidropsia fetal - quadro clínico

A

Incompativel com vida extrauterina
Natimorto
Anemia e hipóxia grave que peovocam falencia cardiaca e edema fetal (hidropsia)

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7
Q

Doença da hemoglobina H - fisiopato

A

Sobras de cadeia B, formam tetrâmeros (B4) que sao a HbH

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8
Q

Doença da hemoglobina H - quadro clinico

A

Anemia moderada microcitica e hipocromica
Esplenomegalia
Quadro semelhante a talassemia intermedia
Hemolise extravascular
Eritropoise ineficaz

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9
Q

Alfataalassemia minor - quadro clinico

A

Assintomatico

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10
Q

Alfatalassemia minor - diagnostico

A

Acidental
Hemograma sem anemia, mas com microcitose e hipocromia
Fe normal
Eletroforese normal

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11
Q

Alfatalassemia minor - tto

A

Nao ha

Estudo genetico para aconselhamento genetico

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