Evaluation of primary and accessory respiratory muscles and their influence on exercise capacity and dyspnea in pulmonary arterial hypertension.
Heart Lung
; 57: 173-179, 2023.
Article
em En
| MEDLINE
| ID: mdl-36219922
BACKGROUND: Skeletal and respiratory muscle disfunction has been described in pulmonary arterial hypertension (PAH), however, involvement of accessory respiratory muscles and their association with symptomatology in PAH is unclear. OBJECTIVES: To assess the primary and accessory respiratory muscles and their influence on exercise tolerance and dyspnea. METHODS: 27 patients and 27 healthy controls were included. Serratus anterior (SA), pectoralis muscles (PM) and sternocleidomastoid (SCM) muscle strength were evaluated as accessory respiratory muscles, maximal inspiratory (MIP) and expiratory pressures (MEP) as primary respiratory muscles, and quadriceps as peripheral muscle. Exercise capacity was evaluated with 6-min walk test (6MWT), dyspnea with modified Medical Council Research (MMRC) and London Chest Activity of Daily Living (LCADL) scales. RESULTS: All evaluated muscles, except SCM, and 6MWT were decreased in patient group (p < 0.01). SA was the most affected muscle among primary and accessory respiratory muscles (Cohen's-d = 1.35). All evaluated muscles significantly correlated to 6MWT (r = 0.428-0.525). A multivariate model including SA, SCM and MIP was the best model for predicting 6MWT (R = 0.606; R2 = 0.368; p = 0.013) and SA strength had the most impact on the 6MWT (B = 1.242; ß = 0.340). None of the models including respiratory muscles were able to predict dyspnea, however PM and SA strength correlated to LCADL total (r = -0.493) and MMRC (r = -0.523), respectively. CONCLUSION: SCM may be excessively used in PAH since it retains its strength. Considering the relationship of accessory respiratory muscles with exercise tolerance and dyspnea, monitoring the strength of these muscles in the clinical practice may help providing better management for PAH.
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Base de dados:
MEDLINE
Assunto principal:
Tolerância ao Exercício
/
Hipertensão Arterial Pulmonar
Limite:
Humans
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article