Key result
Greater pulse rate complexity links to slower cognitive decline, equivalent to being ~3 years younger.
Why the study?
Cardiovascular diseases are linked to cognitive health, and subclinical changes like cardiac autonomic dysfunction precede disease. It was unknown whether pulse rate complexity is associated with longitudinal cognitive decline in older adults.
Is the complexity of pulse rate associated with longitudinal cognitive decline in older adults?
Cohort (n=503)
Is the complexity of pulse rate associated with longitudinal cognitive decline in older adults?
Effect estimate: 1-SD increase equivalent to ~3 years younger
Higher complexity of pulse rate, measured via distribution entropy from overnight pulse oximetry, is associated with slower cognitive decline in older adults.
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Should not yet guide cognitive monitoring; leaves open whether pulse rate complexity predicts or modifies decline.
Gao et al. (2025) conducted a cohort in Cognitive decline (n=503). Complexity of pulse rate (distribution entropy) vs. Conventional time- or frequency-domain pulse rate variability measures was evaluated on Longitudinal changes in global cognition (1-SD increase equivalent to ~3 years younger). Greater complexity of pulse rate (distribution entropy) was associated with a slower decline in global cognition, with a 1-SD increase equivalent to being approximately 3 years younger.
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