Tetralogy of Fallot (ToF) is a combination of these four heart defects: large VSD, enlarged aorta, pulmonary stenosis, and hypertrophy.
This heart also depicts hypoplasia of the left pulmonary artery.
In this heart, Dextrocardia causes the whole heart to flip so the RA is on the patient’s left side and the LA is on the patient’s right side.
Also, the CCTGA causes just the ventricles to swap places. So, the LV is on the patient’s left side again and the RV is on the patient’s right side again.
When the heart is forming, the artery trunk splits into the pulmonary artery and the aorta. In Truncus Arteriosus, the Pulmonary Artery and Aorta do NOT fully split from each other. This results in a common valve and common path leaving the heart. [Type I: the Pulmonary Artery branches off from the common trunk BEFORE splitting to go to the right and left lungs.]