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Year 2 CR > Development of the Heart > Flashcards

Development of the Heart Flashcards

1
Q

what are endocardial heart tubes dervied from

A

blood islands

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2
Q

what happens in lateral folding

A

two endocardial tubes join to make one heart tube

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3
Q

what is direction of primitive blood flow

A

inferior to superior

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4
Q

what causes dextrocardia

A

problem with Dynein microtubules

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5
Q

what separates primitive atrium and ventricle

A

atrioventricular canal

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6
Q

what causes division of atrioventricular canal into two

A

lateral and inferior endocardial cushions

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7
Q

what is ostium

A

hole

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8
Q

how is foramen ovale formed

A

septum primum and secundum grow. leave a space.

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9
Q

flow of blood through foramen ovale

A

r to left

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10
Q

what closes foramen ovale

A

septum primum

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11
Q

most common septal defect

A

ventricular

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12
Q

VSD cyanotic?

A

no

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13
Q

what does truncus arteriosus form

A

aorta and pulmonary trunk

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14
Q

what causes truncus arteriosus septation

A

truncoconal swellings growing in a sprial

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15
Q

what brings ox blood to foetus

A

umbilical vein

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16
Q

four acyanotic heart lesions

A

ASD
VSD
Patent ductus arteriosus
coarctation of aorta

17
Q

what is coarctation of aorta

A

pre or post ductal narrowing of aorta

18
Q

risk of small PDA

A

bacterial endocarditis

19
Q

3 cyanotic heart lesions

A

Tetralogy of Fallot
Persistent truncus arteriosus
transposition of great vessels

20
Q

tetralogy of F

A

VSD
massive aorta
pulmonary stenosis
r ventricle hypertrophy

21
Q

persistent truncus arteriosus

A

one vessel coming from both ventricles - HF

22
Q

transposition of g vessels?

A

bad spiraling
immediate surgery

23
Q

where does gas exchange happen in foetus

A

placenta

24
Q

what do umb il arteries do

A

carry deox blood from foetus to placenta

25
Q

ductus arteriosus?

A

ox blood from pulmonary artery to aorta, bypassing lungs

26
Q

ductus venosus?

A

bypasses foetal liver
carries oxygenated blood from umbilical vein to IVC

27
Q

changes at birth

A

lungs start
ductus v -> ligamentum venosum
ductus a -> ligamentum arteriosum
foramen ovale -> fossa ovalis
umb vein -> ligamentum teres
umb artery -> medial umbilical ligament

28
Q

label

A

1 fossa ovalis
2 pectinate muscles
3 SVC
4 christae terminalis

29
Q

label

A

4 ligamentum arteriosum
5 pulmonary trunk

30
Q
A

Year 2 CR (33 decks)

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