Right ventricular hypertrophy

Enlarged right ventricle with thickened wall

VSD (Ventricular septal defect)

Ventricular septal defect (abnormal opening between left and right ventricles)

Pulmonary stenosis

Narrowing of the pulmonary artery causing blockage of bloodflow

Overriding aorta

Aorta is located more to the right than normal and takes in blood both ventricles

PDA* (Patent ductus arteriosus)

*Not part of Tetralogy of Fallot, but frequently occurs with it "Patent Ductus Arteriosus": a vessel that usually closes up shortly after birth, but in this case remained open, causing changes to bloodflow