Septic shock is associated with sepsis which is the presence of pathogenic organisms in the blood or tissues. It is frequently associated with abdominal and pelvic infection complicating trauma or surgery. In early septic shock, the preload and afterload are decreased, and the myocardial contractility is increased. In late septic shock, the preload and afterload are increased and the myocardial contractility is decreased. The fourth type of shock is distributive shock.
Distributive shock is defined as a profound decrease in systemic vascular tone.
These drugs include barbiturates, phenothiazines and antihypertensive agents. Anaphylactoid shock is a reaction similar to anaphylactic shock, but does not require the incubation period of induced sensitivity. Additionally, anaphylactoid shock is not associated with antigen-antibody reactions. In distributive shock, as in early septic shock, the preload and afterload are decreased while the myocardial contractility is increased. There are three other possible causes of shock in neonates and young infants .