The victim complains of a sharp or crushing pain in the chest that lasts more than a few minutes; the pain may spread to the back, neck, jaw, shoulder or arm, especially the left one. The victim is often anxious, cold and abnormally pale. Other symptoms include shortness of breath, sweating, dizziness and nausea. In certain cases, the victim may have trouble breathing and speaking or suffer from paralysis of the limbs.
Cardiac arrest can occur at any time; it is thus vital to call emergency services as soon as possible.
Put the victim in a quiet spot and isolate him if he is agitated. Have the victim lay down to avoid any harm if he falls; if this is not possible, or if the victim has respiratory troubles, have him sit. Loosen the victim's collar and belt to facilitate breathing. If the victim asks spontaneously for sugar, give him some, preferably in chunks.
Ask the victim a couple of questions:
Call the emergency services and give them all of the above information, then supervise the victim while waiting for paramedics to arrive.
