35. Cardiovascular changes in pregnancy Peaks in early 2nd trimester, then stable until term ↑ 33%-45% Cardiac output Early 2nd trimester, then stable ↑ 10%-30% Stroke volume Early 2nd trimester, then stable ↑ 12-18 beats/min Heart rate All bottom at 20-24 wk, then rise gradually to prepregnancy values at term ↓ 4-6mm Hg ↓ 8-15mm Hg ↓ 6-10mm Hg Arterial blood pressures Systolic Diastolic Mean Timing Account of change Parameter
62. No significant change Progressive rise throughout pregnancy of 0.1-0.2L Lowered by about 15%(0.55L in late pregnancy compared with 0.65L postpartum) Falls considerably (0.77L in late pregnancy compared with 0.96L postpartum) Unchanged ,expect for possibly a small terminal diminution Increased by about 5% Lowered by about 18% Increased by about 40% as a result of the increased tidal volume and unchanged respiratory rate Respiratory rate Tidal volume Expiratory reserve volume Residual volume Vital capacity Inspiratory capacity Functional residual capacity Minute ventilation Change in Pregnancy Test Lung volumes and capacities in pregnancy
![[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/3-maternalphysiology2009-090507103700-phpapp02/85/3-Maternal-Physiology2009-1-320.jpg)
