How does chronic inflammation affect HRV and heart disease risk?

Chronic inflammation dampens HRV by altering autonomic balance: vagal (parasympathetic) activity declines while sympathetic activity rises. Pro-inflammatory cytokines (IL-6, TNF-α) and CRP can impair baroreflex sensitivity and promote oxidative stress, endothelial dysfunction, and plaque progression. Lower HRV is consistently linked with higher risk of arrhythmias and adverse cardiovascular outcomes, and inflammation and reduced HRV often amplify each other. Lifestyle factors that raise inflammation, sedentary behavior, obesity, poor diet, smoking, inadequate sleep, also reduce HRV, creating a loop that elevates disease risk. Interventions that reduce systemic inflammation (regular aerobic exercise, Mediterranean-style diet, weight loss, sleep optimization, stress management, smoking cessation) tend to improve HRV and may lower cardiovascular risk. For personalized risk, discuss testing for inflammatory markers with a clinician.

Chronic inflammation lowers HRV by reducing vagal tone and boosting sympathetic activity, signaling higher heart disease risk; reducing inflammation can improve autonomic balance.