Effect of anxiety on the function of the cardiorespiratory system

Abstract

The effects of anxiety on the external respiration system and respiratory sinus arrhythmia (RSA) were studied in healthy subjects in real life conditions. Changes in external respiration parameters and heart rate variability (HRV) in students going to take their end of term exams were assessed relative to a midterm period, and the cardiorespiratory system was monitored in a longitudinal study for 50 days. The function of the cardiorespiratory system was characterized by measuring external respiration parameters and calculating HRV parameters. State anxiety (SA) was assessed using Spielberger's scale. An increase in SA before an exam was accompanied by a higher breathing rate, a higher tidal volume, and lower HRV indices, especially those related to respiratory sinus arrhythmia (HF and HF norm ). The changes in the parameters depended on the increase in SA. A negative correlation was observed between midterm HF and pre exam SA. The longitudinal study revealed a distinct negative correlation between respiratory sinus arrhythmia parameters and peak expi ratory flow (PEF) and a positive correlation between SA and PEF in the majority of subjects. Changes in car diorespiratory parameters depended on the changes in SA in the longitudinal study. An increase in SA was accompanied by substantial changes in respiratory sinus arrhythmia (RAS) and external respiration parame ters, and their correlation was assumed to indicate that modification of parasympathetic activity plays a lead ing role in increasing PEF.

Non-invasive prognostic biomarker of lung cancer patients with brain metastases: Recurrence quantification analysis of heart rate variability

“…The results showed that the complexity decreased during ischemia. Dimitriev et al (2020) demonstrated that the Lmax exhibited a significant increase (the largest Lyapunov exponent decreased) during mental stress than the rest state, indicating increased predictability and a decreased complexity of the system dynamics during mental stress. All the above studies illustrated that a decrease in the unpredictability and complexity of the heart rate modulation system is closely linked to the disease states of the body.…”

The Cardiorespiratory Network in Healthy First-Degree Relatives of Schizophrenic Patients

“…The significant alterations within the cardiorespiratory system seem clearly pointing to a diseaserelated hallmark in SZO and could reflect responses of the ANS during psychosis in acute schizophrenic patients. Due to, that relatives are not in the same "emotional and psychotic state" as patients it seems to be that the alterations within the cardiorespiratory system are closely connected to the emotions in SZO (Suess et al, 1980;Dimitriev et al, 2014;Jerath et al, 2015) and occur mainly only in this disease (Schulz et al, 2015b).…”