You should call 911 or go to an emergency room IF you feel short of breath, including when walking.
You should call 911 right away IF you are experiencing potential life-threating symptoms which include:
Debe llamar o ir a una sala de emergencias SI…siente dificultad para respirar incluso al caminar.
Debe llamar 911 de inmediato si experimenta síntomas potencialmente mortales que incluyen: