What question did this study set out to answer?

To define and validate the baroreflex effectiveness index as a novel metric for measuring how frequently the baroreflex modulates heart rate in response to daily blood pressure changes.

March 1, 2001AJP Regulatory Integrative and Comparative Physiology

Baroreflex effectiveness index: an additional measure of baroreflex control of heart rate in daily life

View Full Paper

Ask AI

Bookmark

To define and validate the baroreflex effectiveness index as a novel metric for measuring how frequently the baroreflex modulates heart rate in response to daily blood pressure changes.
Assessed the specificity of the baroreflex effectiveness index in 8 cats before and after sinoaortic denervation.
Quantified 24-hour baroreflex effectiveness index and baroreflex sensitivity across daytime and nighttime periods in 14 healthy human subjects.
Sinoaortic denervation in cats produced an 89% reduction in the baroreflex effectiveness index.
In healthy humans, the 24-hour average index value was 0.21, exhibiting diurnal variation (~0.25 during the day vs. ~0.15 at night) in counterphase with baroreflex sensitivity.
Arterial baroreflexes induced pulse interval changes in response to only 21% of all systolic blood pressure ramps.

Structured PICO

Population

8 cats and 14 healthy humans

Intervention

Measurement of the baroreflex effectiveness index (BEI), defined as the ratio between the number of systolic blood pressure ramps followed by respective reflex pulse interval ramps and the total number of systolic blood pressure ramps; sinoaortic denervation was performed in the cat model.

Outcome

Baroreflex effectiveness index (BEI) values and day-night modulationsurrogate

The baroreflex effectiveness index (BEI) quantifies the frequency of baroreflex-driven pulse interval changes in response to blood pressure ramps, providing complementary physiological information to traditional baroreflex sensitivity.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

BEI may complement baroreflex sensitivity in research settings; leaves open its clinical utility pending validation in disease.

Cite This Study

Rienzo et al. (2001) studied this question.

synapsesocial.com/papers/6a70a6355d37378ac1ddc816 https://doi.org/10.1152/ajpregu.2001.280.3.r744

View Full Paper

Ask AI

Bookmark

Baroreflex effectiveness index: an additional measure of baroreflex control of heart rate in daily life

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Baroreflex effectiveness index: an additional measure of baroreflex control of heart rate in daily life

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Also Consider