Call 911. In the event of a possible heart attack, stroke, trouble breathing, loss of consciousness or other life-threatening situation, the Fire and Rescue Department recommends calling 911 immediately so that an Advanced Life Support Unit with skilled personnel can be dispatched to aid you. They will probably arrive at your home within 5-10 minutes - far faster and with less risk to life than your going to the emergency room. See Fire and Rescue on this subject.