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511551
Outflow obstruction in well child
Description
Paediatrics (Cardio) Mind Map on Outflow obstruction in well child, created by v.djabatey on 28/01/2014.
No tags specified
cardio
paediatrics
paediatrics
cardio
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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Resource summary
Outflow obstruction in well child
aortic stenosis
aortic valve leaflets partly fused together
giving a restrictive exit from left ventricle
may be 1-3 aortic leaflets
may not be an isolated lesion
often assoc w/ (& so must exclude)
mitral valve stenosis
coarctation of aorta
clinical features
asymptomatic murmur
commonest presentation
presentation of severe stenosis
reduced exercise tolerance
chest pain on exertion
syncope
presentation in neonatal period
severe heart failure->shock
presentation of critical aortic stenosis & duct dependent circulation
physical signs
small vol, slow rising pulses
carotid thrill (always)
ejection systolic murmur maximal @ upper right sternal edge
delayed & soft aortic S2
apical ejection click
Ix
CXR
normal
prominent left ventricle w/ post stenotic dilatation of asc aorta
ECG
left ventricular hypertrophy
deep S wave in V2 and tall R wave in V6
down going T wave
suggests left ventricular strain & aortic stenosis
congenital type commoner in boys
Mx
regular assessment
clincal
echo
if symptomatic on exercise or hihg resting Pa gradient (> 64 mmHg) across aortic valve
balloon valvotomy
generally safe in older kids
more difficult & dangerous in neonates
eventual aortic valve replacement
neonates & kids w/ sig aortic stenosis requiring Rx in 1st few years of life
early Rx
palliative
directed @ delaying valve replacement
avoid competitive sports if severe aortic stenosis
if severe, risk of sudden death
pulmonary stenosis
pulmonary leaflets partly fused together
-> restrictive exit from right ventricle
seen in Noonan's syn
clinical features
presentation
asymptomatic
mild-mod stenosis
poor exercise tolerance
severe stenosis
right ventricular failure/cyanosis
critical stenosis
clinical diag
physical signs
ejection sys murmur
best heard at upper left sternal edge
thrill
ejection click
best heard at upper left sternal edge
prominent right ventricular heave
when severe stenosis
Ix
CXR
normal
post stenotic dilatation of pul a
ECG
right ventricular hypertrophy
upright T wave in V1
Mx
most kids are asymptomatic
when Pa grad across pul valve gets sig increased ( > 64 mmHg)
intervention needed
trans-catheter balloon dilatation
adult-type coarctation of aorta
uncommon
not duct dependent
gradually gets more severe over many years
usually occurs distal to origin of left subclavian a @ level of ductus arteriosus
commoner in boys than girls
but more common in Turner's syn
clinical features
asymptomatic
systemic hypertension in right arm
ejection systolic murmur
upper sternal edge
or btw shoulder blades
collaterals heard w/ continuous murmur at the back
radio-femoral delay
due to blood bypassing obstruction via collateral vessels in chest wall
so pulse in legs delayed
weak/absent femoral pulses
Ix
CXR
rib notching
due to development of large collateral intercostal aa running under ribs posteriorly to bypass obstruction
3 sign
w/ visible notch in desc aorta @ site of coarctation
ECG
left ventricular hypertrophy
deep S wave in V2, tall R wave in V6 and upright T wave
downgoing T wave in V6
suggest left ventricular strain and severe coarctation and/or HTN
Mx
when condition severe
as assessed by echo
stent insertion using cardiac catheter
surgical repair
complications
premature coronary heart disease
congestive cardiac failure
hypertensive encephalopathy
intracerebral haemorrhage
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