Heart rate variability as a marker of autonomic nervous system activity in young people with eosinophilic and non-eosinophilic asthma.

ANS activity (as measured using HRV analysis) is not associated with pathophysiology or inflammatory phenotype in young asthmatics with generally well-controlled asthma. However, enhanced SNS activity can be detected in asthmatics with AHR or who use β-agonist medication.