All of the following physiological changes are seen in pregnancy except:
Ans. d. Increased peripheral resistance (Ref: Dutta 6/e p53, 51)During the physiological course of pregnancy, maternal peripheral vascular resistance decreases."Pregnancy is a state of hypervolemia. There is active retention of sodium (900 mmol), potassium (350 mmol) and water."- Dutta 6/e p51Hemodynamic Changes during Pregnancy Non-PregnantPregnancy near TermChangeCardiac output (liter/min)4.56.26+40%Stroke volume (ml)6575+27%Heart rate (per minute)7085+17%Blood pressureUnaffected or mid-pregnancy drop of diastolic pressure by 5-10 mm HgVenous pressure8-10 cm (femoral)20 cm water+100% waterColloid oncotic pressure2018-14%Systemic vascular resistance -21%Pulmonary vascular resistance -34%
Increased stroke volume
Increased cardiac output
Increased intravascular volume
Increased peripheral resistance
Cardiovascular System