Key result
Falling pressure yielded a rightward shifted and more sensitive arterial baroreflex response curve compared to rising pressure, causing a hysteresis reversal at hypotensive pressures.
Observational
The arterial baroreflex exhibits hysteresis, processing diastolic pressure differently depending on whether pressure is rising or falling.
Baroreflex hysteresis reversal at hypotension warrants no practice change; leaves open its relevance to human BP control and modeling.
The findings show that the arterial baroreflex processes diastolic pressure dependent on the direction of pressure change from the previous beat, yielding two distinct baroreflex response curves to falling and rising pressure. Overall, the falling pressure curve is rightward shifted and more sensitive. The rightward shift caused a hysteresis reversal at hypotensive pressures as the falling pressure saturation plateau of the sigmoid response curve occurred at higher pressures than the rising pressure curve.
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Incognito et al. (2020) reported an observational. Falling pressure vs. Rising pressure was evaluated on Arterial baroreflex response. Falling pressure yielded a rightward shifted and more sensitive arterial baroreflex response curve compared to rising pressure, causing a hysteresis reversal at hypotensive pressures.
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