Cardiorespiratory Fitness, Coronary Artery Calcium, and Cardiovascular Disease Events in a Cohort of Generally...

Area of Science:

• Cardiology
• Preventive Medicine
• Exercise Physiology

Background:

• Coronary artery calcification (CAC) and cardiorespiratory fitness (CRF) are established independent predictors of cardiovascular disease (CVD).
• The combined impact of CAC and CRF on CVD risk remains less understood.
• Previous research suggests higher CRF may mitigate CVD events in individuals with high CAC.

Purpose of the Study:

• To investigate the effect of continuous levels of CRF on CVD risk.
• To assess this association across varying degrees of CAC burden.
• To understand the joint predictive value of CRF and CAC for CVD events.

Main Methods:

• Utilized data from 8425 men without clinical CVD undergoing preventive examinations (1998-2007).
• Measured CRF objectively and assessed CAC burden.
• Employed parametric proportional hazards regression models for analysis over an average 8.4-year follow-up.

Main Results:

• CVD events increased with higher CAC and decreased with higher CRF.
• Each additional MET of CRF was associated with an 11% lower CVD risk (HR, 0.89; 95% CI, 0.84-0.94), independent of CAC.
• A strong inverse relationship between CRF and CVD incidence was observed across all CAC severity groups.

Conclusions:

• Higher CRF attenuates CVD risk across all levels of coronary artery calcification in generally healthy men.
• Cardiorespiratory fitness is a crucial factor in mitigating cardiovascular risk, regardless of existing CAC.
• Promoting higher CRF may be a key strategy in preventing CVD events in diverse populations.