Acute cardiac autonomic and hemodynamic responses to resistive breathing: Effect of loading type and intensity

IF 1.3 4区医学 Q4 PHYSIOLOGY

Clinical Physiology and Functional Imaging Pub Date : 2024-03-18 DOI:10.1111/cpf.12877

Karan Pongpanit, Manta Korakot, Peerakan Nitilap, Nopparat Puplab, Noppawan Charususin, Kornanong Yuenyongchaiwat

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引用次数: 0

Abstract

Objectives

This study aimed to assess the acute impact of distinct loading breathing types and intensities on cardiac autonomic function and hemodynamic responses in healthy young adults.

Methods

A randomized, crossover trial involved 28 participants who underwent inspiratory resistive breathing, expiratory resistive breathing (ERB) and combined resistive breathing, each at 30% and 60% of maximal respiratory pressures. Data on heart rate variability (HRV) and hemodynamic parameters were collected during each trial.

Results

The study revealed significant main and interaction effects for both the performed task and the intensity across all measured variables (all p < 0.001). ERB at 60% load demonstrated significantly higher HRV values in the standard deviation of normal-to-normal RR intervals, the square root of the mean squared difference of successive normal-to-normal RR intervals and high-frequency power, as well as significantly lower values in heart rate, stroke volume, stroke volume index, cardiac output, cardiac index, end-diastolic volume and end-diastolic volume index, compared to other loaded protocols (all p < 0.001).

Conclusion

These findings highlight the acute effect of type-specific and load-dependent resistive breathing on cardiac autonomic and hemodynamic functions, where ERB at 60% intensity showed the most significant cardiovagal modulation while causing the least hemodynamic alterations.

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阻力呼吸的急性心脏自主神经和血液动力学反应：负荷类型和强度的影响。

研究目的本研究旨在评估不同负荷呼吸类型和强度对健康年轻人心脏自主神经功能和血流动力学反应的急性影响：这项随机交叉试验涉及 28 名参与者，他们分别在 30% 和 60% 的最大呼吸压力下进行了吸气阻力呼吸、呼气阻力呼吸 (ERB) 和联合阻力呼吸。每次试验期间都收集了心率变异性（HRV）和血液动力学参数的数据：研究显示，在所有测量变量中，所执行的任务和强度都有明显的主效应和交互效应（均为 p）：这些研究结果凸显了特定类型和负荷依赖性阻力呼吸对心脏自主神经和血流动力学功能的急性影响，其中 60% 强度的 ERB 对心脏迷走神经的调节作用最显著，而对血流动力学的改变最小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Clinical Physiology and Functional Imaging 医学-生理学

CiteScore

3.40

自引率

5.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Clinical Physiology and Functional Imaging publishes reports on clinical and experimental research pertinent to human physiology in health and disease. The scope of the Journal is very broad, covering all aspects of the regulatory system in the cardiovascular, renal and pulmonary systems with special emphasis on methodological aspects. The focus for the journal is, however, work that has potential clinical relevance. The Journal also features review articles on recent front-line research within these fields of interest. Covered by the major abstracting services including Current Contents and Science Citation Index, Clinical Physiology and Functional Imaging plays an important role in providing effective and productive communication among clinical physiologists world-wide.