Peritoneal Cancer How To Manage A Cancer Patient With Shortness Of Breath While Sitting Upright?

How to manage a cancer patient with shortness of breath while sitting upright? - peritoneal cancer

Laying in bed, okay. However, shortness of breath (and the higher rate of heart beat) is becoming increasingly difficult to move while sitting or standing. Is there a reason, and what can be done to improve the situation? The patient has adrenal cancer (stage 4) and spread to the liver, peritoneal area.