Congenital Heart Defects Presentation
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Transcript of Congenital Heart Defects Presentation
8/20/2019 Congenital Heart Defects Presentation
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Congenital Heart DefectsMODULE F
Chapter ElevenCardiac System
Pages 348 - 359
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Objectives
• Differentiate between the different
congenital heart diseases and state
whether they are cyanotic and acyanotic.
• Describe the defect present with each
congenital heart disease.
• Describe the surgical repair (if any) for
each congenital heart disease.
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Cardiac Defects
• Patent Ductus Arteriosus
• Atrial Septal Defect
• Ventricular Septal Defect
• Tetralogy of Fallot
• Transposition of the Great Arteries
• Coarctation of the Aorta
• Anomalous Venous Return
• Truncus Arteriosus
• Hypoplastic Left-Heart Syndrome
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Web Sites
• http://www.childrensheartinstitute.org/edu
cate/defects/defects.htm
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Normal Cardiac Blood Flow
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Ductus Arteriosus
• Fetal Circulation Component
• Connects Pulmonary Artery to Aorta
• Shunts blood away from lungs
• Maintained patent by presence of
prostaglandins
• Closure secondary to:
• Increase in PaO2_
• Decrease in level of prostaglandins
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Patent Ductus Arteriosus
• 5-10% of all births (1 of 2000 live births)
• 80% of premature babies
• 2-3 times more common in females than
males.
• 5th or 6th most common congenital cardiac
defect.
• Often associated with other defects.
• May be desirable with some defects.
• Morbidity/Mortality related to degree of
blood flow through PDA.
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Pathophysiology - PDA
• With a drop in pulmonary arterial pressure
(reduction in hypoxic pulmonary vascularconstriction), blood will flow through PDA.
• LEFT TO RIGHT SHUNT
•
Increased pulmonary blood flow may lead topulmonary edema.
• Reduced blood flow to all postductal organs
• NEC
• If pulmonary artery pressure rises above Aorticpressure, blood will move in the other direction.
• RIGHT TO LEFT SHUNT
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Diagnosis - PDA
• Loud grade I to grade III systolic murmur
at left sternal border.
• Washing machine
• Echocardiography
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Treatment - PDA
• Restrict fluids.
• Diuretics
• Prostaglandin Inhibitors - Indomethacin
•
Surgical closure (ligation).
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Atrial Septal Defect
• 6-10% of all births (1 of 1500 live births)
• 2 times more common in females than males.
• Types:
• Ostium Secundum (at or about the Foramen Ovale)
•Sinus Venous (at about the point where SVC and IVCattach to Right Atrium)
• In 1950 most children with ASD did not reach the
first grade. Today, first year surgery facilitates
normal growth and development.
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ASD P h h i d
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ASD: Pathophysiology andDiagnosis
• Pathophysiology
• Left to Right Shunt
• Inefficient recirculation of good blood through
pulmonary arteries.
•
May not manifest symptoms and may befound later in life.
• If defect is significant, may cause problems
later in life due to inefficiencies.
• Diagnosis
• Murmur
• Echocardiography
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Treatment - ASD
• Surgical closure.
• Non-Surgical closure via cardiac
catheterization.
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Ventricular Septal Defect
• 1% of all births (2 to 4 of 1000 live births)
• Vast majority the hole is small.
• In 1950, fatal. Today almost all VSD can be
closed successfully, even in small babies.
Lillehei was the first person in history tocorrect both ASD and VSD on 8/31/54.
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VSD: Pathophysiology & Diagnosis
• Pathophysiology
• May be isolated or associated with other
congenital cardiac defects.
• With normal PVR:
• LEFT TO RIGHT SHUNT
• With elevated PVR (RDS):
• RIGHT TO LEFT SHUNT
•
Diagnosis• Echocardiography
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Treatment - VSD
• Nothing if VSD is small.
• With CHF or Failure to Thrive: Surgical
closure.
http://64.143.41.32/news.html
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Tetralogy of Fallot• 1% of neonates.
• Most common of the cyanotic cardiac diseases.• Mortality increases with age (1 year-old has a
25% mortality, 40 year-old has 95%).
• In 1950, fatal. Today, less than 5% mortality withchildren operated on in infancy, leading normallives.Four Defects• Pulmonary Artery Stenosis (determinant factor related
to severity)• VSD (usually large)
• Overriding Aorta
• RV hypertrophy
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Tetralogy of allot agnos s an
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Tetralogy of allot: agnos s an Treatment
• Tet Spells
•CXR: Boot-shaped Heart
• Diagnosed with echocardiography.
• Surgical correction.• Reparative or Palliative (Blalock-Taussig)
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Blalock-Taussig
• Something
the LordMade.
• Vivien
Thomas
Com lete T ns osition of the
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Complete Transposition of theGreat Arteries
• Second most common form (5-7%) of
congenital cardiac anomalies.
• Aorta arises from RV and Pulmonary
Arteries from LV.
• Without an abnormality, life would not
be possible.
• ASD
• VSD (30-40%)
• PDA
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Transposition Diagnosis and
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Transposition – Diagnosis and Treatment
• Diagnosis
• Chest X-Ray: “Egg on aString”
• Echocardiography
• Cardiac Catheterization (?)
•Treatment• Balloon septostomy during
cardiac cath.• Rashkind’s Procedure
• Reestablish Foramen Ovale
• Prostaglandin E1 to keepPDA open.
• Surgical Correction• Jantene Operation
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Coarctation of the Aorta
• 7% of congenital cardiac defects.
• Constriction of the aorta.
• Results in severely reduced blood flow.
• Increased work on the heart leading to
CHF and cardiovascular collapse.
• Location of narrowing determines the
clinical signs.
• Usually associated with PDA, VSD and a
defective aortic valve.
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Location of Coarctation
• Pre-Ductal
• Less common but more serious
• Associated with VSD, PDA, Transposition
• Post-Ductal
• More common
• Often associated with collateral circulation
beyond coarctation, which minimizes effect.
• Diagnosed by a difference in blood pressurebetween lower extremities and upper ones.
• Pressure in upper extremities > lower
oarctat on agnos s an
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oarctat on – agnos s an Treatment
• Diagnosis
• Chest X-Ray
• Echocardiography
• Cardiac catheterization
• Treatment
• Support with inotropic agents (Dopamine).
• Prostaglandins to maintain PDA.
• Surgical repair
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A V R
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Anomalous Venous Return
• Return of pulmonary venous blood to the
right atrium instead of the left.• ASD is present to sustain life.
• Can also be partial.
• Cyanosis usually present.
• Diagnosed with echocardiography.
• Surgical correction with reimplantation of
pulmonary veins.
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Truncus Arteriosus
• Defect in which one large vessel arises fromright and left heart over a large VSD.
• Cyanosis is often present.
•
CHF common.• Diagnosed with echocardiography and
cardiac catheterization.
• Surgery:
• Separate pulmonary arteries from truncus.
• Closure of VSD
• Create valved connection between RV and
Pulmonary Artery
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Repair of Truncus
Arteriosus
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Hypoplastic Left-Heart Syndrome• Several anomalies:
• Coarctation of the aorta• Hypoplastic left ventricle
• Aortic and mitral valve stenosis or atresia.
•
Cyanotic defect.• Right heart pumps blood to body through
PDA.
•
Closure of PDA results in hypotension,shock, and death.• Maintain hypoxemia with normalized CO2
levels.•
“40-40 Club”
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1 Patentforamenovale
2 Coarctationof the aorta
3 Patent ductus
arteriosus4 Narrowed
aorta
5 Hypoplasticleft ventricle
6 Aortic atresia
Surgical Treatment of Hypoplastic Left
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Surgical Treatment of Hypoplastic LeftHeart Syndrome
• Three separate
surgeries.• Norwood procedure
• First few days after birth.
• Glenn Shunt (CavoPulmonary Connection)• 3-9 months of age
• Fontan Procedure•
2 years of age• Less wait because of
damage from pulmonaryhypertension.
St ge I No wood P ocedu e
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Stage I - Norwood Procedure
Stage II Glenn Shunt
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Stage II - Glenn Shunt
Stage III Fontan Procedure
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Stage III – Fontan Procedure