Key result
Pregnant women showed greater cardiac output (2.0 vs 1.3 L/min/m1.83; P=0.02) and basal circumferential strain (-23.5% vs -14.6%; P=0.001) during isometric contraction compared to nonpregnant women.
Why the study?
Whether the increased resting demand of pregnancy alters acute cardiac responses to exercise in healthy pregnant women is not well understood.
Does pregnancy alter acute cardiac responses to submaximal isometric contraction and aerobic exercise in healthy women?
Cross-Sectional (n=45)
Does pregnancy alter acute cardiac responses to submaximal isometric contraction and aerobic exercise in healthy women?
Absolute Event Rate: 2% vs 1.3%
p-value: p=0.02
The maternal heart appropriately responds to additional cardiac demand during acute isometric and dynamic exercise, with greater LV mechanics underpinning global cardiac function in pregnant women.
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May indicate adaptive cardiac responses to isometric contraction in pregnancy; hypothesis-generating and should not yet change practice.
Meah et al. (2020) conducted a cross-sectional in Healthy pregnancy (n=45). Submaximal isometric contraction and aerobic exercise vs. Nonpregnant and postpartum women was evaluated on Cardiac output during isometric contraction (L·min-1·m-1.83) (p=0.02). Pregnant women showed greater cardiac output (2.0 vs 1.3 L/min/m1.83; P=0.02) and basal circumferential strain (-23.5% vs -14.6%; P=0.001) during isometric contraction compared to nonpregnant women.
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