A Personal Health System for Self-Management of Congestive Heart Failure (HeartMan): Development, Technical Evaluation, and Proof-of-Concept Randomized Controlled Trial

Figure 1. The logical architecture of the HeartMan system.

Figure 2. Exercise-related screens of the HeartMan app: the main screen, blood pressure input before the exercise, health check before the exercise, and exercise list.

Figure 3. Mindful game "World Sense".

Figure 4. The physical architecture of the HeartMan system.

Figure 5. Dashboards of the HeartMan mobile app for physical activity, nutrition, mental support, and medication management.

Figure 6. Screenshots of the HeartMan web application for medical professionals: heart rate measurements (upper) and adherence to the HeartMan-suggested self-management (lower).

Figure 7. Mean absolute error of systolic blood pressure and diastolic blood pressure estimation in the leave-one-subject-out experiment using the Empatica E4 wristband. DBP: diastolic blood pressure; MAE: mean absolute error; SBP: systolic blood pressure.

Figure 8. Segment of example estimates and ground truth diastolic blood pressure from the HeartMan trial. DBP: diastolic blood pressure.