> ## Documentation Index
> Fetch the complete documentation index at: https://docs.medera.info/llms.txt
> Use this file to discover all available pages before exploring further.

# Blood Pressure

> Systolic and diastolic estimation from PPG morphology + HR

BP is estimated by `_estimate_blood_pressure(hr, ppg_signal, peaks)`. Output is `systolic_bp`, `diastolic_bp`, and `bp_confidence`.

<Warning>
  Medera's BP is an **estimate** derived from rPPG morphology, not a cuff measurement. Use for **trend** observation; do not use as a clinical decision substitute for a calibrated cuff.
</Warning>

| Aspect           | Value                                                              |
| :--------------- | :----------------------------------------------------------------- |
| Minimum duration | 60 s                                                               |
| Output           | `systolic_bp` (mmHg), `diastolic_bp` (mmHg), `bp_confidence` (0–1) |