What medical term is used for a condition that results from pulmonary hypertension, creating chronic pressure overload in the right ventricle?

Right-sided congestive heart failure (CHF), and if due to a primary pulmonary problem Rt. CHF is termed Cor Pulmonale

They probably don't understand either 1. what the nightmare is about or 2. his anxiety and stress

Depression is lifelong, though you can get medication to with it. the difference between sadness and depression is that sadness lasts a little bit, depression last a long time and it goes on and off. people usually get depression through experiences they have been through, or genetics.