Transfer function-derived central pressure and cardiovascular disease events: the Framingham Heart Study

Area of Science:

• Cardiovascular Medicine
• Biomedical Engineering
• Epidemiology

Background:

• Central pulse pressure (PP) and pressure amplification relationships with cardiovascular disease (CVD) events are debated.
• Central aortic pressure estimation may offer improved CVD risk prediction beyond brachial systolic blood pressure (SBP).

Purpose of the Study:

• To evaluate the predictive value of central hemodynamics, including augmentation index and central PP, for major CVD events.
• To compare the predictive capability of central aortic pressure estimates against traditional brachial SBP measurements.

Main Methods:

• Radial artery tonometry and a generalized transfer function were used to assess central hemodynamics.
• Proportional hazards models analyzed the association between central hemodynamics and first-onset CVD events in 2183 Framingham Heart Study participants.

Main Results:

• Augmentation index, central aortic systolic pressure, central aortic PP, and PP amplification were not significantly related to CVD events after multivariable adjustment.
• Adding brachial SBP after central pressure estimates improved model fit, whereas adding central pressure after brachial SBP did not.

Conclusions:

• Central PP and PP amplification, derived via radial tonometry and a generalized transfer function, were not predictive of CVD risk when accounting for standard risk factors including brachial SBP.
• Brachial SBP remains a crucial predictor of cardiovascular risk, outperforming central aortic pressure estimates in this cohort.