510577
Description
Mind Map by v.djabatey, updated more than 1 year ago
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Created by v.djabatey
about 10 years ago
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persistent ductus arteriosus
- ductus arteriosus connects pulmonary artery to descending aorta
- in term infants, normally closes shortly after birth
- PDA= ductus
arteriosus has failed to
close by 1 month after
the expected date of
delivery
- due to defect in constrictor
mechanism of the duct
- flow of blood
across PDA is
from aorta to
pulmonary artery
(L to R)
- after fall in pul vasc res after birth
- after fall in pul vasc res after birth
- in preterm
infant PDA is
due to
prematurity not
congenital
heart disease
- due to defect in constrictor
mechanism of the duct
- in term infants, normally closes shortly after birth
- clinical features
- unusual sx
- sx of heart failure & pulmonary HTN
- if duct large -> increased pulmonary blood flow
- if duct large -> increased pulmonary blood flow
- sx of heart failure & pulmonary HTN
- signs
- continuous
murmur
beneath L
clavicle
- continues
into diastole
as Aorta Pa
> pulmonary
a Pa
throughout
cardiac cycle
- continues
into diastole
as Aorta Pa
> pulmonary
a Pa
throughout
cardiac cycle
- collapsing or bounding pulse
- due to increase in pulse Pa
- due to increase in pulse Pa
- continuous
murmur
beneath L
clavicle
- unusual sx
- Ix
- usually normal
- CXR
- ECG
- CXR
- if PDA large and symptomatic
- features no different to large VSD
- ECG
- left ventricular
hypertrophy w/ large
L to R shunt
- right
ventricular
hypertrophy w/
pul HTN
- left ventricular
hypertrophy w/ large
L to R shunt
- CXR
- normal/ enlarged heart
- enlarged pulmonary arteries
- increased pulmonary vasc
- normal/ enlarged heart
- ECG
- echo
- easily IDs duct
- easily IDs duct
- features no different to large VSD
- usually normal
- Mx
- closure
- to abolish lifelong risk of
- bacterial endocarditis
- pulmonary vasc disease
- bacterial endocarditis
- method
- coil or occlusion device
- introduced via
cardiac catheter at ~
1yr old
- introduced via
cardiac catheter at ~
1yr old
- surgical ligation
- coil or occlusion device
- to abolish lifelong risk of
- closure
- a type of left to right shunt
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