  Cardiovascular monitoring is important to prevent diseases from progressing.
The jugular venous pulse (JVP) waveform offers important clinical information
about cardiac health, but is not routinely examined due to its invasive
catheterisation procedure. Here, we demonstrate for the first time that the JVP
can be consistently observed in a non-contact manner using a novel light-based
photoplethysmographic imaging system, coded hemodynamic imaging (CHI). While
traditional monitoring methods measure the JVP at a single location, CHI's
wide-field imaging capabilities were able to observe the jugular venous pulse's
spatial flow profile for the first time. The important inflection points in the
JVP were observed, meaning that cardiac abnormalities can be assessed through
JVP distortions. CHI provides a new way to assess cardiac health through
non-contact light-based JVP monitoring, and can be used in non-surgical
environments for cardiac assessment.
