Publication: Effectiveness of device-guided breathing in chronic coronary syndrome: a randomized controlled study
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Date
2023-09-01
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Abstract
Background: Chronic coronary syndrome (CCS) is one of the most life-restricting coronary artery diseases, and
symptom relief is the main goal in CCS patients who suffer from angina.
Objectives: To assess the potential benefits of device-guided breathing in CCS patients with angina in this randomized,
controlled, single-blinded study.
Methods: Fifty-one patients with CCS received device-guided breathing for 7 days/8 weeks. Exercise capacity
[exercise stress test], cardiac function [transthoracic echocardiography], and angina severity [Canadian Cardiovascular
Society Classification] were evaluated initially and after the training. Device-guided breathing was performed at
the lowest resistance of the device (POWERbreathe Classic LR) for the control group (n = 17). The low load training
group (LLTG; n = 18) and high load training group (HLTG; n = 16) were trained at 30% and 50% of maximal inspiratory
pressure. Baseline characteristics were compared using one-way ANOVA and Kruskal-Wallis test. Categorical data
were compared using the chi-square test. ANCOVA was performed to compare changes between three groups. A p
value < 0.05 was considered statistically significant.
Results: Metabolic equivalent values were significantly improved in both HLTG and LLTG groups (p < 0.001, p =
0.003). The Duke treadmill score significantly improved and shifted to low-risk both in the HLTG (p < 0.001) and
LLTG (p < 0.001) groups. Angina severity significantly alleviated after the training in both HLTG and LLTG groups (p <
0.001, p = 0.002).
Conclusions: An 8-week long program of short-term respiratory muscle training provided positive gains in exercise
capacity and angina severity in CCS patients with angina. The effects of long-term training programs on CCS patients
should be investigated clinically because of the possibility of helping to decrease the need for invasive treatments.
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Keywords
Atherosclerosis, Chronic stable angina, Exercise test, Respiratory muscle training
Citation
Akkus O., Huzmeli I., Seker T., Bekler O., Sen F., Kaypakli O., Yildiz Ozer A., Yalcin F., "Effectiveness of Device-Guided Breathing in Chronic Coronary Syndrome: A Randomized Controlled Study.", Acta Cardiologica Sinica, cilt.39, sa.5, ss.720-732, 2023