Evidence-Based Prediction and Prevention of Adverse Outcomes Caused by Postpartum Hypertension

To better understand postpartum blood pressure changes, the investigators are proposing a study to monitor blood pressure after delivery in 100 patients who the investigators expect to have normal blood pressure (i.e. low-risk group), 100 patients who the investigators expect to be at risk of new-onset high blood pressure postpartum (i.e. intermediate-risk group), and 100 patients who had high blood pressure prior to pregnancy (or very early, before 20 weeks in pregnancy) who the investigators know are at high risk of blood-pressure related complications postpartum (i.e. high-risk group). Patients will be given a non-invasive wearable device that monitors blood pressure continuously for 6 weeks postpartum. The investigators expect that the daily changes in blood pressure will be different between these groups, which may allow us to better predict who is at risk, how much monitoring is needed, and when to intervene before the blood pressure abnormalities cause complications. The blood pressure device that will be given to patients is the YHE® BP Doctor Med Blood Pressure Smartwatch. This is a highly-accurate medical grade device that has not received FDA clearance. As such, the device is not being used to make blood pressure management and treatment decisions, but rather to gather data on postpartum cardiovascular physiology. Safety stops are built into the protocol such that elevated readings detected by the watch will trigger clinical referrals and validation by standard blood pressure cuffs prior to determine need for treatment.