Congenital Diaphragmatic Hernia, or CDH, is a birth defect with complications to the diaphragm. Pulmonary Hypertension, or high blood pressure in the lungs, is the other effect where, after birth, the lack of proper blood flow creates the vessels to be so small that pressure builds up causing problems with the lungs.
You can learn how the hernia is initially caused here: https://youtu.be/LcHdHdCvqnk
And learn about the other effect of CDH, Pulmonary Hypoplasia, here: https://youtu.be/Dr8-089evYA
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