July 1, 1994AJP Heart and Circulatory Physiology

Increasing the respiratory interval from 3 to 6 seconds progressively increased the high-frequency amplitude of heart rate variability in both supine and tilt positions (P=0.001 and 0.035, respectively), while the mean R-R interval remained unchanged.

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Why the study?

Does paced breathing and its respiratory interval modify the relationship between spectral components of heart rate variability and cardiac vagal tone in healthy young males?

Population

7 healthy young males under beta-adrenergic blockade by intravenous propranolol (0.2 mg/kg)

Comparison

Paced breathing at varying respiratory intervals vs Spontaneous breathing

Design

Other

Authors

JHJunichiro Hayano SMShizuo Mukai MSMasahito Sakakibara

Discussion

Member takes

Overview

Longer respiratory intervals amplify HF-HRV amplitude without changing mean R-R; hypothesis-generating for paced breathing standardization in vagal assessment.

Structured PICO

Does paced breathing and its respiratory interval modify the relationship between spectral components of heart rate variability and cardiac vagal tone in healthy young males?

Population

7 healthy young males under beta-adrenergic blockade by intravenous propranolol (0.2 mg/kg)

Intervention

Paced breathing at varying respiratory intervals (same as spontaneous, and increased from 3 to 6 seconds)

Comparator

Spontaneous breathing

Outcome

Spectral components of heart rate variability (amplitude of high-frequency and low-frequency components) and mean R-R intervalsurrogate

Increased respiratory intervals during paced breathing amplify respiratory-related vagal modulation of heart rate without changing mean cardiac vagal tone.

Cite This Study

Hayano et al. (1994) studied this question.

synapsesocial.com/papers/6a704d19febe604dd70915f6 https://doi.org/10.1152/ajpheart.1994.267.1.h33

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July 1, 1994AJP Heart and Circulatory Physiology

Increasing the respiratory interval from 3 to 6 seconds progressively increased the high-frequency amplitude of heart rate variability in both supine and tilt positions (P=0.001 and 0.035, respectively), while the mean R-R interval remained unchanged.

View Full Paper

Ask AI

Bookmark

Why the study?

Does paced breathing and its respiratory interval modify the relationship between spectral components of heart rate variability and cardiac vagal tone in healthy young males?

Population

7 healthy young males under beta-adrenergic blockade by intravenous propranolol (0.2 mg/kg)

Comparison

Paced breathing at varying respiratory intervals vs Spontaneous breathing

Design

Other

Authors

JHJunichiro Hayano SMShizuo Mukai MSMasahito Sakakibara

Discussion

Member takes

Overview

Longer respiratory intervals amplify HF-HRV amplitude without changing mean R-R; hypothesis-generating for paced breathing standardization in vagal assessment.

Structured PICO

Does paced breathing and its respiratory interval modify the relationship between spectral components of heart rate variability and cardiac vagal tone in healthy young males?

Population

7 healthy young males under beta-adrenergic blockade by intravenous propranolol (0.2 mg/kg)

Intervention

Paced breathing at varying respiratory intervals (same as spontaneous, and increased from 3 to 6 seconds)

Comparator

Spontaneous breathing

Outcome

Spectral components of heart rate variability (amplitude of high-frequency and low-frequency components) and mean R-R intervalsurrogate

Increased respiratory intervals during paced breathing amplify respiratory-related vagal modulation of heart rate without changing mean cardiac vagal tone.

Cite This Study

Hayano et al. (1994) studied this question.

synapsesocial.com/papers/6a704d19febe604dd70915f6 https://doi.org/10.1152/ajpheart.1994.267.1.h33

Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

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