Tricuspid atresiaX-ray Findings - No transposition
 Normal-sized heart
 Decreased pulmonary vessels (60-70%)
Pulmonic stenosis usually present
 Flat/concave pulmonary artery
 Small ASD  enlarged RA
Blood can’t exit RA
 Large ASD  normal or slightly  RA
Blood can exit RA
Tricuspid atresia—some PS, no transposition
Normal-sizeheart
Decreasedpulmonaryvasculature
Concave MPA
RA notenlarged=largerASD
Tricuspid atresia—some PS, no transposition
Tricuspid atresiaX-ray Findings - Transposition
 Mild cardiomegaly
 Engorged pulmonaryvessels
 No pulmonic stenosis
 No characteristicappearance to heart
Ao
PA
Tricuspid atresia—no PS, shunt vessels
Enlarged heart
Shunt vessels
Tricuspid atresia—no PS, shunt vessels
Why Tricuspid Atresia Appears on BothIncreased and Decreased Vasculature DDxswith Cyanosis
With PS
Without PS
Tricuspid atresia
ECG-gated spin-echotransaxial imagedemonstrates a bar ofmuscle and fat (bluearrow) (tricuspid atresia)separating the rightatrium (yellow arrow)from the hypoplasticright ventricle (redarrow)
Amersham
Tricuspid atresia
Enlargedright atrium
Small rightventricle
Ebstein’s Anomaly
Ebstein’s Anomaly
Ebstein’s AnomalyGeneral
Rare
Posterior and septal cusps of tricuspid valvedisplaced into right ventricle
 Right ventricle smaller or “atrialized”
Tricuspid insufficiency  right atrialpressure  a R  L shunt through foramenovale (or ASD)
Cyanosis is present in neonate
Ebstein’s Anomaly
Remember
Increased volume of blood from regurgitantvalves always produces larger sized chambersthan does blood under increased pressure asin a stenotic valve
Ebstein’s Anomaly
Normal
Ebstein’s AnomalyX-ray Findings
Cardiomegaly
 One of only conditions  cardiomegalyfirst few days of life
Unusual prominence to right heart border
Pulmonary flow is decreased
Ebstein’s
Anomaly
Ebstein’s
Anomaly
Markedcardiomegaly
Decreasedvasculature
Cyanosis
Ebstein’s
Anomaly
Ebstein’s
Anomaly
Ebstein’s Anomaly
Ebstein’s Anomaly
Ebstein’s AnomalyTriad
Decreased flow
Cyanosis
MarkedCardiomegaly
Cyanosis with Dec vascularity
Tricuspid atresia*-normal
Transposition*-normal
Tetralogy-normal
Truncus-type IV-enlarged
Ebstein's-huge
Single Ventricle
Single Ventricle
Single Ventricle
Surprise!
There are usually two ventricles in this disease
Single ventricle: one “normal” ventricle withtwo atria
Three types of Single Ventricle
Morphologic LV with a rudimentary RV (common)
Morphologic RV with a rudimentary LV (rare)
Morphologically indeterminate ventricle (rare)
Single Ventricle
Most common
Morphologic LV with rudimentary RV
Also called
 Double-inlet left ventricle
 Common ventricle
 Univentricular heart
Frequently difficult to determinewhich anatomic ventricle is present