It is possible that a person diagnosed with stage 4 congestive heart failure take a long car or train trip?

Yes, but: Yes, but they need to take precautions. They should move around, stretch, and walk every 2 hrss to avoid a blood clot. If travel is prolonged, Lovenox (enoxaparin) should be considered. One must be sure to have enough of all of their medicines and, if necessary, oxygen. Their diuretic may be inconvenient and a urine bottle can be helpful. However, it's just as restful to sit in a car or train as in a bedroom.