First aid treatment for patients with haemodialysis when there is shortness of breath?

DDx, Tx: I'm not sure i would say "first aid". I would say that the etiology of shortness of breath needs to be determined. The differential diagnosis (ddx) could include: volume overload, chf, pulmonary embolism, copd/asthma, pneumonia, etc. The treatment depends on the diagnosis/etiology of the symptom of shortness of breath.

Need evaluation: There might be component of coronary disease need evaluation may be BP related or arrhythmia any way need further work up.