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Cardiac autonomic dysfunction and health‐related quality of life in patients with chronic obstructive pulmonary disease
Author(s) -
VAN GESTEL ARNOLDUS J.R.,
KOHLER MALCOLM,
STEIER JöRG,
TESCHLER SEBASTIAN,
RUSSI ERICH W.,
TESCHLER HELMUT
Publication year - 2011
Publication title -
respirology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.857
H-Index - 85
eISSN - 1440-1843
pISSN - 1323-7799
DOI - 10.1111/j.1440-1843.2011.01992.x
Subject(s) - medicine , pulmonary disease , quality of life (healthcare) , cardiology , intensive care medicine , disease , cardiac dysfunction , heart failure , nursing
Background and objective: COPD is associated with impaired health‐related quality of life (HRQL) and cardiac autonomic dysfunction. Data describing the association between these factors in patients with COPD are mostly lacking. The objective of this study was to evaluate whether there is an association between cardiac autonomic dysfunction and HRQL in COPD. Methods: We studied 60 patients with COPD (37 women, mean (SD) age 65.20 (7.73) years, FEV 1 % pred. 46.58 (18.53) %) and measured HRQL, as assessed by the Chronic Respiratory Disease Questionnaire, and cardiac autonomic dysfunction, as assessed by heart rate variability (HRV). Analysis of HRV was performed using a Holter‐ECG device during a recording period of 5 min. To evaluate a possible association between these factors, univariate and multivariate analyses were used. Results: There was a significant correlation between Chronic Respiratory Disease Questionnaire total score and both variables of HRV reflecting parasympathetic tone; root mean square successive difference of RR intervals (rMSSD) ( r = 0.34, P = 0.012) and the density of the beat‐to‐beat oscillation in the N‐N interval of HRV in the high‐frequency band (HF power) ( r = 0.35, P = 0.01). In a multivariate analysis rMSSD was found to be independently associated with HRQL after correcting for FEV 1 , carbon monoxide transfer coefficient (DL CO ), 6MWD and CRP. Conclusions: Resting parasympathetic tone, as measured by HRV, is independently associated with HRQL, which emphasizes the role of cardiac autonomic dysfunction on HRQL in patients with COPD.