John C Spears

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BACKGROUND The maternal and neonatal risks associated with pregnancy in women with heart disease receiving comprehensive prenatal care have not been well defined. METHODS AND RESULTS We prospectively enrolled 562 consecutive pregnant women with heart disease and determined the outcomes of 599 pregnancies not ending in miscarriage. Pulmonary edema,(More)
BACKGROUND The physiological changes of pregnancy can result in cardiovascular complications in the mother, which in turn may have fetal implications. Prior studies have focused on specific cardiac lesions or identified univariate predictors. There is a need to refine the risk stratification of women with heart disease so they can receive appropriate(More)
BACKGROUND Pregnant women with heart disease (HD) are at increased risk for cardiac (CV) complications. However, the frequency of neonatal (NE) complications in pregnant women with HD relative to pregnant women without HD has not been examined. METHODS AND RESULTS Pregnant women with HD were prospectively monitored during 302 pregnancies. The frequency of(More)
The purpose of this study was to determine if children presenting with a chief complaint of back pain at a pediatric orthopedic office attribute their pain to wearing a heavy backpack. A retrospective medical records search was performed to identify school-age patients with back pain. Of the 346 patients included in this study, only 1 child attributed back(More)
The objective of two experiments was to correlate plasma levels of urea N (PUN) and the percentage of urine N in the form of urea (UUN) to weight gain in response to different dietary protein regimens for growing Angus steers. In Exp. 1, 60 steers (302 kg BW) were assigned to various levels of dietary N (control plus supplemental N to provide from 100 to(More)
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