Respiratory sinus arrhythmia during stress predicts resting respiratory sinus arrhythmia 3 years later in a pediatric sample.
The author examined whether respiratory sinus arrhythmia (RSA) responses to stress predicted resting RSA approximately 3 years later in children and adolescents. A total of 149 children and adolescents (49% girls and women, 44% African Americans) participated in 2 laboratory protocols approximately 3 years apart. RSA reactivity during tasks was consistent within participants across tasks during each session. Resting RSA at Visit 1 explained 17% of the variance in resting RSA at Visit 2 when body mass index, duration between visits, race, gender, and age were controlled for. Visit 1 RSA reactivity explained an additional 5% of the variance in resting RSA at Visit 2. The positive relationship between Visit 1 reactivity and Visit 2 resting levels suggests that larger decreases in RSA during stress predicted lower resting RSA. Conversely, increases in RSA during stress were associated with higher resting RSA an average of 3 years later.
Salomon
Kristen
K
University of South Florida, Tampa, FL 33620, USA. ksalomon@chuma1.cas.usf.edu
D000293:Adolescent; D000367:Age Factors; D001146:Arrhythmia, Sinus / Q000453:epidemiology / Q000503:physiopathology* / Q000523:psychology; D015992:Body Mass Index; D002648:Child; D015897:Comorbidity; D005006:Ethnicity; D005260:Female; D005500:Follow-Up Studies; D006321:Heart / Q000294:innervation* / Q000503:physiopathology; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D012119:Respiration; D012143:Respiratory Physiological Phenomena; D012146:Rest; D012737:Sex Factors; D013315:Stress, Psychological / Q000453:epidemiology / Q000503:physiopathology / Q000523:psychology*; D014630:Vagus Nerve / Q000502:physiology*