Observational study of Non-Invasive Venous waveform Analysis (NIVA) to assess intracardiac filling pressures during right heart catheterization.

This observational proof of concept study utilizing a prototype NIVA device demonstrates a moderate correlation between NIVA value and PCWP in patients undergoing RHC. NIVA thus represents a promising developing technology for non-invasive assessment of congestion in spontaneously breathing patients.