Can pvc's cause chest tightness and shortness of breath?

Possibly: Pvs are extra beats and in succession can cause your complaints. You may want to get an ekg or go to the emergency room.

PVC's : In a healthy 31 yr old male, pvc's are almost never the cause of any major issues. Mostly likely, you're having some anxiety when experiencing pvc's (which is very common)! nevertheless, get a check up to make sure there isn't anything else going on. If you're checkup is clean, i bet those symptoms will go away after getting the proper reassurance.