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- W2077247100 abstract "A number of studies have found that increasing lead exposure is associated with increases in blood pressure in humans. Studies with animals suggest that lead-induced increases in vascular resistance account for these increases in blood pressure. The present study assessed cardiovascular functioning at rest and in response to acute stress for 9(1/2) year old children (N=122) having relatively low prenatal (cord) blood lead levels (M=1.98 microg/dL, SD=1.75) and low postnatal (early childhood) blood lead levels (M=4.62 microg/dL, SD=2.51). Higher cord blood levels were associated with higher baseline systolic blood pressure (SBP), and higher early childhood lead levels were associated with greater total peripheral (vascular) resistance (TPR) responses to acute stress. In addition, a negative association between blood lead levels and stroke volume (SV) suggests that lead-induced increases in vascular resistance were sufficient to produce cardiac afterload, a situation arising when blood pressure in the aorta makes it difficult for the left ventricle to eject blood. These effects were not mediated by differences in task performance or emotional responses to the acute stress tasks. Finally, these effects were significant for lead levels considered low, notably, below the 10 microg/dL threshold currently adopted by the CDC for deleterious effects." @default.
- W2077247100 created "2016-06-24" @default.
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- W2077247100 date "2005-07-01" @default.
- W2077247100 modified "2023-10-17" @default.
- W2077247100 title "Prenatal and early childhood blood lead levels and cardiovascular functioning in 9½ year old children" @default.
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- W2077247100 doi "https://doi.org/10.1016/j.ntt.2005.04.002" @default.
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