- Tetralogy of Fallot
- Moderately hypoplastic pulmonary valve
- Turbulent flow across the pulmonary valve consistent with pulmonary valve stenosis
- Moderate sized patent ductus arteriosus with left to right shunting
- Tetralogy of Fallot
- Mildly hypoplastic pulmonary valve
- Turbulent flow across the pulmonary valve consistent with pulmonary valve stenosis
- Spectral Doppler across the right ventricular outflow tract (RVOT) and pulmonary valve
- D= Dagger-like Doppler pattern consistent with dynamic obstruction across the RVOT seconcdary to infundibular narowing
- PV= Second superimposed Doppler pattern consistent with fixed obstruction across the pulmonary valve.
Echocardiographic Assessment: Parasternal long axis (pulmonary valve)
- Assess infundibular obstruction (2D, color and spectral Doppler, spectral Doppler both pulse and continuous)
- Continuous wave Doppler interrogation of the right ventricular outflow tract demonstrates high-veloctiy flow with late-peaking, dagger-shaped flow consistent with dynamic infundibular obstruction.
- Assess pulmonary valve size and anatomy (2D, color, spectral Doppler both pulse and continuous)
- Assess main pulmonary artery size branch pulmonary artery size and degree of the obstruction (2D, color and spectral Doppler both pulse and continuous)