Pulmonary Arteriovenous Malformation Unmasked by Pregnancy: A Review of Pulmonary Arteriovenous Malformations and Cardiovascular and Respiratory Changes in Pregnancy
Table 2
Physiological changes of the cardiovascular system during the pregnancy [28–38].
Feature
Change
Week of pregnancy/trimester
Blood volume
↑ 1-2 L (up to 40-50%)
Increase from 7th week, peaks at 30-34 weeks
Plasma volume
↑ By 30–50% (=1200-1600 mL) till 70% in twin pregnancies