Biomarkers · Functional Fitness

Chronotropic Index

Higher values go with lower risk of death. No risk curve catalogued yet.

Published risk of death2.19×low chronotropic index vs not low (adjusted RR) (95% CI 1.43–3.44) · Consecutive patients (1877 men, 1076 women; mean age 58) not on beta-blockers referred for treadmill thallium testing, tertiary centre (Cleveland)

Sources

Lauer et al. Impaired chronotropic response to exercise stress testing as a predictor of mortality. JAMA. 1999;281:524-9.

Related markers: Cardiorespiratory Fitness (VO2 Max) · Daily Movement (Wrist Accelerometer, MIMS) · Daily Step Count · Exercise Capacity (METs) · FEV1/FEV6 Ratio · Forced Expiratory Volume in 1 Second (FEV1) · Forced Vital Capacity (FVC) · Heart Rate Recovery (1 min)