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Association of antepartum blood pressure levels and angiogenic profile among women with chronic hypertension.
Pregnancy Hypertension 2018 October
BACKGROUND: Angiogenic factors have been implicated in the pathogenesis of preeclampsia. This pilot study explored the association between antenatal blood pressure levels and angiogenic biomarkers (sFlt1 and PlGF) among women with chronic hypertension (cHTN).
METHODS: Blood samples were collected from women with cHTN (with/without superimposed preeclampsia) within 96 h prior to delivery. Subjects were stratified by mean outpatient BP as controlled (cBP < 140/90) or uncontrolled (uBP ≥ 140/90). Descriptive statistics were generated and assessed as appropriate. Logistic regression was employed to assess for adverse pregnancy outcomes between groups.
RESULTS: Data from seventy-eight women were analyzed, of which 58 (74.4%) were African American. Fifty-six (71.8%) had cBP and 22 (28.2%) had uBP. Use of antepartum outpatient antihypertensive medications was more frequent in patients with uBP (46.4% vs. 13.6%, p = 0.01). Compared to women with cBP, women with uBP had higher levels of pre-delivery sFlt1 and sFlt1/PlGF ratio (sFlt: 4218.5 vs. 3056.0 pg/ml, p = 0.046; sFlt/PlGF: 62.5 vs. 25.0, p = 0.04). Additionally, more uBP patients had superimposed preeclampsia with severe features (54.6% vs. 25.0%; p = 0.01) and preterm delivery (defined as a gestational age <35 weeks (40.9% vs. 10.7%; p = 0.002)) than cBP patients. In the multivariable model, women with uBP had greater odds of preterm delivery (OR 6.78; p = 0.01), superimposed preeclampsia (OR 3.20; p = 0.03) and preeclampsia with severe features (OR 3.27; p = 0.04) than women with cBP.
CONCLUSION: In women with cHTN, elevated antepartum BP is associated with worsened outcomes and may be associated with abnormal angiogenic profile at delivery. Larger studies are needed to confirm these findings.
METHODS: Blood samples were collected from women with cHTN (with/without superimposed preeclampsia) within 96 h prior to delivery. Subjects were stratified by mean outpatient BP as controlled (cBP < 140/90) or uncontrolled (uBP ≥ 140/90). Descriptive statistics were generated and assessed as appropriate. Logistic regression was employed to assess for adverse pregnancy outcomes between groups.
RESULTS: Data from seventy-eight women were analyzed, of which 58 (74.4%) were African American. Fifty-six (71.8%) had cBP and 22 (28.2%) had uBP. Use of antepartum outpatient antihypertensive medications was more frequent in patients with uBP (46.4% vs. 13.6%, p = 0.01). Compared to women with cBP, women with uBP had higher levels of pre-delivery sFlt1 and sFlt1/PlGF ratio (sFlt: 4218.5 vs. 3056.0 pg/ml, p = 0.046; sFlt/PlGF: 62.5 vs. 25.0, p = 0.04). Additionally, more uBP patients had superimposed preeclampsia with severe features (54.6% vs. 25.0%; p = 0.01) and preterm delivery (defined as a gestational age <35 weeks (40.9% vs. 10.7%; p = 0.002)) than cBP patients. In the multivariable model, women with uBP had greater odds of preterm delivery (OR 6.78; p = 0.01), superimposed preeclampsia (OR 3.20; p = 0.03) and preeclampsia with severe features (OR 3.27; p = 0.04) than women with cBP.
CONCLUSION: In women with cHTN, elevated antepartum BP is associated with worsened outcomes and may be associated with abnormal angiogenic profile at delivery. Larger studies are needed to confirm these findings.
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