In hypovolemic shock all happen EXCEPT: September 2012: (A) Constriction of capacitance vessels, (B) Constriction of aerioles in the skin, (C) Decrease in cardiac output, (D) Hea rate decreases
Answer is D. Ans. D i.e. Hea rate decreases Hypovolaemic shock It is due to inadequate circulation volume. The most common causes of this type of shock being any cause of fluid loss; haemorrhage, salt and water loss, sepsis, burns, etc. A poor venous return to the hea will decrease the stroke volume and cardiac output. The patient will attempt to compensate by tachycardia and increased systemic vascular resistance (SVR). They become cold peripherally (shut down).