What is dyspnea and cardiac dythesia?

Dyspnea is difficulty breathing... for what ever reason. I assume you mean Cardiac Dyspnea rather then "Dythesia" (no such word) Cardiac Dyspnea is difficulty breathing due to cardiac (heart) origins. This is usually known as Pulmonary Edema which is kind of like "lung swelling."

Usually the heart becomes damaged or enlarged and becomes a much less efficient pump. Then there is a backup of blood in the lungs because the left ventricle, the main pumping chamber of the heart, is dysfunctional usually below 20% of full function. Another scenario is that you have ingested to much fluid or to much salt and retained to much fluid for the failing heart to function.

( I have seen Congestive Heart Failure patients eat a well endowed dill pickle during dinner, and be in the hospital ER by 3-4 AM.) This blood back up begins to push the blood plasma (liquid part of the blood) out of the billions of vessels in the lung and into the billions of microscopic air spaces (avieoli) and the breathing ... more.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.