cardiology Flashcards
pathophysiology of TGA
ductus arterioles is closing/has closed so pulmonary circulation supplied systemic organs causing cyanosis
CXR of TGA
egg shadow and increased pulmonary vascular markings with narrow pedicle
treatment of TGA
prostaglandin E2 keep DA open until surgery (an arterial switch procedure)
risk factors of coarctation of aorta
turners 45XO, male, bicuspid aorta, PKD, NFM-1
what is coartation of aorta
congenital narrowing of the aorta usually just distal to origin of left subclavian around DA
symptoms of coarctation of aorta
reduced blood pressure distal to coarctation and increased BP proximal
therefore HTN in upper limbs and weak femoral pulses so radiofemoral delay and higher BP in right arm compared to left
systolic murmur over left scapula
notching of inferior borders of ribs inn adults due to intercostal HTN
HF in infancy
investigations of coarctation or aorta
4 limb BP CXR = rib notching ECG = LV strain CT angiogram ECHO and doppler
treatment of coarctation of aorta in sick neonate
IV prostaglandins
fluids and furosemide
ventilation
treatment of coarctation in adult
balloon dilation and stunting, BB for HTN
symptoms of bicuspid aortic valve
no problems at birth but leads to stenosis and regurgitation and predisposed to IE
causes of PDA
premature
symptoms of PDA
machine like constant murmur at left subclavian due to shifting blood
wide pulse pressure with bounding and collapsing pulse
treatment of PDA
NSAIDS or IV indomethacin which are cyclooxgenase inhibitors to promote PDA closure
if this doesn’t close, give prostaglandins and surgery by 6 months
symptoms of VSD
small = LOUD pan systolic murmur at LSE large = quieter, and pulmonary HTN
can be asymptomatic or severe HF
symptoms of HF in neonates
breathless, sweating, poor feeds, recurrent chest infections
investigations in VSD
ECG
small = normal
large = RVH and LVH
CXR
small = mild pulmonary plethora
large = cardiomegaly and marked pulmonary plethora
treatment of VSD
if symptomatic or large = surgical closure at 3-6 months
diuretics, ACE-I, high calorie diet, surgery
definition of cyanosis
> 5g/L of deoxygenated Hb
complication of VSD and AVSD
can lead to Eisenmeiger syndrome - a shunt reversal due to pulmonary HTN
cyanotic heart disease in children
TGA and TOF due to right to left shunt so misses out the lung
what is tetralogy of fallot
abnormal separation of trunks arterioles into aorta and pulmonary artery
pulmonary stenosis
VSD
overriding aorta
RVH
causes of TOF
Di George
symptoms of TOF
infant = cyanosis, squatting, clubbing
adult = asymptomatic, cyanosis
ejection systolic murmur a LLSE
investigations in TOF
boot shaped heart