Most common type of shock is-

Cardiogenic shock (CS) is characterized by systemic hypoperfusion due to severe depression of the cardiac index and sustained systolic aerial hypotension (<90 mmHg) despite an elevated filling pressure . It is associated with in-hospital moality rates >50%. . Circulatory failure based on cardiac dysfunction may be caused by primary myocardial failure, most commonly secondary to acute myocardial infarction (MI ), and less frequently by cardiomyopathy or myocarditis, cardiac tamponade, or critical valvular hea disease.Most patients have continuing chest pain and dyspnea and appear pale, apprehensive, and diaphoretic. Mentation may be altered, with somnolence, confusion, and agitation. The pulse is typically weak and rapid, often in the range of 90-110 beats/min, or severe bradycardia due to high-grade hea block may be present. Systolic blood pressure is reduced (<90 mmHg) with a narrow pulse pressure (<30 mmHg), but occasionally BP may be maintained by very high systemic vascular resistance. Tachypnea, Cheyne-Stokes respirations, and jugular venous distention may be present. The precordium is typically quiet, with a weak apical pulse. S 1 is usually soft, and an S 3 gallop may be audible. Acute, severe MR and VSR usually are associated with characteristic systolic murmurs Rales are audible in most patients with LV failure causing CS. Oliguria (urine output <30 mL/h) is common. ref:harrison&;s principles of internal medicine,ed 18,pg no 2232