Abstract 4345869: Self-Monitoring And Responsive Technology for postpartum blood pressure control (SMART postpartum BP program): A Feasibility Study

Background: Hypertensive disorders of pregnancy (HDP) affect 15% of pregnant individuals and contribute significantly to maternal morbidity and mortality. Recent work in the U.K. suggests that extended home blood pressure monitoring (HBPM) after delivery, combined with blood pressure (BP) medication self-management, may improve cardiovascular outcomes at 9-months postpartum. Our objective was to develop a similar program using an established text-based HBPM program and assess the feasibility among a racially diverse cohort of postpartum patients with the HDP in the U.S. Methods: We conducted an unblinded single-arm pilot feasibility trial among postpartum individuals with HDP who delivered at Penn Medicine. All participants completed our institution’s 10-day, automated, text-based HBPM program that is standard of care for postpartum patients with hypertension. Between August and October 2024, we invited patients who completed the 10-day program to extend HBPM for an additional 10 weeks and provided a self-management guide for medication adjustment to achieve a goal BP < 140/90. Patients could participate regardless of BP medication use at enrollment. Following program completion, we conducted semi-structured interviews to identify barriers and facilitators to engagement. The primary implementation outcomes were extended program completion, engagement, and feasibility. Results: Of 426 eligible patients, 166 (36%) were enrolled in the intervention. The mean age was 33 years (SD 5.6), 42.8% identified as Black, and 66.3% were privately insured. Retention was 83.7% at week 6 and 74.7% at week 10 (Figure 1). Participants who discontinued were less likely to have chronic hypertension or be prescribed BP medication at enrollment. On average, participants submitted 13.4 (SD 12.0) BP measurements during the program. The most common barrier to program engagement was time, and factors that supported engagement were the text reminders, convenience of measuring BP at home, and receiving a BP monitor. Stress/anxiety was a common theme and mostly associated with high BP readings; participants described feeling reassured that they were being monitored remotely. Other themes included health literacy/education and health care provider contact (see Table 1). Conclusion: Extended home-based BP monitoring with self-management tools is feasible and shows promise for integration into standard of care for postpartum patients with hypertension.