Chronic Hypertension and Pregnancy (CHAP) Project (CHAP)
- Study HIC#:2000024291
- Last Updated:01/10/2024
Brief Summary:
The purpose of this study is to evaluate whether a blood pressure treatment strategy during pregnancy to achieve targets that are recommended for non-pregnant reproductive-age adults (<140/90 mmHg) compared ACOG- recommended standard during pregnancy (no treatment unless BP is severe) is effective and safe.
- Age12 years and older
- GenderFemale only
Contact Us
For more information about this study, including how to volunteer, contact:
Lauren Perley
- Phone Number: 1-203-737-6040
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Trial Purpose and Description
The purpose of this study is to evaluate whether a blood pressure treatment strategy during pregnancy to achieve targets that are recommended for non-pregnant reproductive-age adults (<140/90 mmHg) compared ACOG- recommended standard during pregnancy (no treatment unless BP is severe) is effective and safe.
Eligibility Criteria
Inclusion Criteria:
1.Women with chronic hypertension in pregnancy with new or untreated chronic hypertension, blood pressure 140-159 systolic or 90-104 diastolic OR known chronic hypertension on monotherapy and taking any antihypertensive and blood pressure ≤159/104 (including those with blood pressure <140/90);
2.Singleton; and
3.viable pregnancy <23 weeks of gestation.
Exclusion Criteria:
1.Blood pressures prior to randomization ≥160 systolic or ≥105 diastolic (with or without treatment);
2.Patients currently treated with >1 antihypertensive medication (more likely to have severe chronic hypertension);
3.Multi-fetal pregnancy;
4.Known secondary cause of chronic hypertension;
5.High-risk co-morbidities for which treatment may be indicated:
◦Class C or higher diabetes mellitus
◦Chronic kidney disease - including baseline proteinuria (>300mg/24-hr, p/c ratio >0.3, or persistent 1+ proteinuria*) or creatinine >1.2.
*If a dipstick value at screening is more than trace, a clean catch or catheter urine should be obtained and re-tested by dipstick. If this shows trace or absence of protein, the patient is included. If it again shows 1+ protein, the patient is excluded until a 24-hr urine <300mg/24hr or p/c ratio is <0.3.
◦Cardiac disorders: cardiomyopathy, angina, CAD
◦Prior stroke
◦Retinopathy
◦Sickle cell disease;
6.Known major fetal anomaly;
7.Known fetal demise;
8.Suspected IUGR;
9.Membrane rupture or planned termination prior to randomization;
10.Plan to deliver outside the consortium centers (unless approved by the Clinical Coordinating Center) or unlikely to follow-up in the opinion of study staff or previous participation in this trial;
11.Contraindication to labetalol or nifedipine (e.g. know hypersensitivity); and (12) Current substance abuse or addiction (cocaine, methamphetamine) *The minimum age varies by center