Blood Pressure
What is Blood Pressure?
Blood Pressure measures the force exerted by blood against the walls of your arteries as your heart pumps. It is recorded as two numbers:
Systolic Pressure (the top number) represents the pressure when your heart beats and bumps out.
Diastolic Pressure (the bottom number) represents the pressure when your heart is at rest between beats.
How to retrieve Blood Pressure from Vitals™ SDK?
ItemItem | DescriptionDescription |
|---|---|
| Supported by Server Version(s) | NyanCat (V1 Backend)CrimsonLion (V2 Backend) |
| User Info Required | Age, gender, weight, and height data are optional to obtain this metric value, but we strongly recommend you to input them for higher accuracy. |
| Vitals™ SDK API | Please use the healthResult.health.vitalSigns.bloodPressure, healthResult.health.vitalSigns.bloodPressureSystolic, or the healthResult.health.vitalSigns.bloodPressureDiastolic variables provided by the callback function onVideoFrameProcessed. |
| API Reference | Health, VitalSign |
What does it mean to have high Blood Pressure?
High Blood Pressure, known as hypertension, can be influenced by genetics, diets, stress, smoking, and alcohol consumption which potentially leads to serious cardiovascular issues.
What does it mean to have low Blood Pressure?
A Blood Pressure reading outside the normal range suggests a higher risk of health problems. Low Blood Pressure (hypotension) can cause dizziness and fainting.
How does Vitals™ SDK measure it?
Blood Pressure is measured by a machine learning model that analyses features of the rPPG signal captured by the camera, such as Pulse Transit Time, which is the time it takes for the blood pressure pulse wave to travel between two arterial sites.
Unit of Measurement: millimeters of mercury (mmHg)
Range
ValueValue | Quantitative InterpretationQuantitative Interpretation |
|---|---|
| Systolic: < 120 Diastolic: < 80 | Normal |
| Systolic: [120, 130) and Diastolic: < 80 | Elevated |
| Systolic: [130, 140) and / or Diastolic: [80, 90) | Hypertension Stage 1 |
| Systolic: > 140 and / or Diastolic: > 90 | Hypertension Stage 2 |
| Systolic: > 180 and / or Diastolic: > 120 | Hypertension Crisis |
The output range for Systolic Blood Pressure is [90, 180], while that for Diastolic Blood Pressure is [60, 110].