What are some of the signs of a cardiac emergency?

Chest pain: Chest pain which lasts for more than a few minutes pain which spreads to the arms, neck, jaw, or shoulders a feeling of "fullness or squeezing" in the chest fainting, sweating, nausea, or shortness of breath feeling of impending doom.

CP, cardiac arrest : Cardiovascular emergencies are life-threatening disorders that must be diagnosed quickly to avoid delay in treatment and to minimize morbidity and mortality. Patients may present with severe hypertension, chest pain, dysrhythmia, or cardiopulmonary arrest.