Heart Rate is typically a calculated measurement, derived from various direct measurements of heart activity, such as ECG, Blood Pressure, or non-invasive pulse measurements. Heart rate indicates the frequency, typically measured in beats per minute...

dP/dt is a signal derived from pressure, typically ventricular blood pressure, that indicates the change in pressure over time.

Respiratory Exchange Ratio (RER) is the ratio between the volume of CO 2 being produced by the body and the amount of O 2 being consumed. This value of this ratio gives us an indication as to whether the body is operating aerobically or anaerobically...

Oxygen saturation is a relative measure of the quantity of dissolved or carried oxygen in the blood. It is usually measured as percentage of hemoglobin binding sites occupied by oxygen in the bloodstream. Arterial oxygen saturation measured at the...

ECG / EKG Signal Electrocardiography (ECG or EKG) is the study of the heart's electrical activity, most commonly recorded via placement of electrodes on the skin. Human and animal ECG signals can be recorded for easy processing of heart rate, heart...

Electrical stimulation has long been used in research to either observe propagation or activation properties, mapping and threshold studies in both human and animal subjects. By varying the amplitude, duration and frequency of stimulation, it has...

Galvanic Skin Response (GSR) measures changes in sweat gland activity on the skin as an indication of physiological or psychological arousal. Galvanic Skin Response may also be referred to as electrodermal response (EDR), skin conductance response...