congenital heart disease Flashcards
what are the different types of ventricular septal defects?
sub pulmonary
membranous
AV canal type
Muscular
what does the haemodynamics of VSD depend on ?
pulmonary artery pressure
size of the defect/hole
does not depend on location
what type of murmur is associated with VSD ?
pan systolic murmur
what is the difference in presentation with a large VSD and a smaller VSD ?
a large VSD presents late and presents with heart failure
a small VSD presents early due to the loud pansystolic murmur
how can VSD be diagnosed and what is the treatment ?
diagnosis : trans-thoracic echo
treatment: surgery between 3-6 months
when does eisenmenger syndrome occur ?
when a large VSD is left untreated the shunt goes from being left to right
to becoming right to left
( higher pressure where the deoxygenated blood is)
what type of murmur is associated with eisenmenger syndrome ?
short ejection pansystolic murmur
what does the chest X-ray of a large VSD show ?
increased cardio-thoracic ratio
left ventricular dilatation
lung plethora
what are the complications of left to right shunts ( large VSD ) ?
recurrent chest infections CHF eisenmenger syndrome Infective endocarditis Arrhythmia
what is the medical treatment for VSD ?
potassium sparing diuretics to decrease the volume overload
captopril
what are the indications for surgical repair of VSD ?
intractable CHF growth failure despite medical therapy Large VSD ( 3-6 months of age )
what does the haemodynamic of the ASD depend on ?
size of the ASD
compliance of the right ventricle
what is the most common type of ASD ?
secundum type where the foramen ovale is patent
what are the clinical signs of heart failure ?
tachypnea
tachycardia
stunted growth
what is heard on auscultation of an atrial septal defect (patent formane ovale )
fixed splitting of the second heart sound
is ASD cyanotic or acyanotic ?
Acyanotic
which clinical finding is not commonly associated with ASD ?
heart failure due to good heart elasticity
what are the haemodynamics behind PDA ?
similar to VSD - associated with volume overload in the left ventricle
which congenital heart defect is most commonly associated with preterm babies ?
Patent Ductus Arteriosus
what type of murmur is associated with PDA ?
continuous systolic murmur ( infraclavicular)
what are the three management options for PDA ?
conservative/Supportive management
Pharmacotherapy ( indomethacin, paracetamol, ibuprofen)
Surgery ( only if the previous two methods have failed)
which genetic abnormality is highly associated with CHD ?
down syndrome
what is AVSD a defect inn ?
endocardial cushion
what is the correlation between hypertrophy and heart failure ?
the more hypertrophy there is the less the chances of occurence of HF