Collapse initially defines the drop in pressure of a body fluid which results in the corruption of the organ on which it depends. This term is now mainly used to refer to cardiovascular collapse. In the heart, it is characterized by a sudden drop in blood pressure resulting in a number of clinical signs such as prostration (sudden loss of muscle strength), cyanosis (bluish tint) and cold in the extremities, tachycardia, and hypotension . It may be due to a large hemorrhage, infarction, a major allergic reaction, or infection. The cause of this shock is researched and must be treated promptly.