Table 1.

Glossary of terms

Intra-arterial (invasive) blood pressure	Direct measurement of blood pressure within the artery using an in-dwelling catheter-based pressure transducer
Peripheral (non-invasive) blood pressure	Blood pressure at a site distal from the aorta. This most often refers to brachial or radial artery blood pressure, but for the purpose of this paper also includes carotid blood pressure even though local derivation is regarded as a surrogate of central blood pressure
Central (aortic) blood pressure	Blood pressure in the proximal ascending aorta
Systolic blood pressure amplification	The increase in systolic blood pressure from proximal to peripheral arterial vessels (e.g. aorta-to-brachial, or brachial-to-radial arteries)
Transfer function	Signal processing step to estimate central blood pressure waveforms from peripherally recorded waveforms
Calibration	Process of scaling a waveform using units of pressure