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Deterioration of heart rate recovery index in patients with systemic lupus erythematosus.
MedLine Citation:
PMID:  20810503     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
OBJECTIVE: Systemic lupus erythematosus (SLE) is an autoimmune disorder resulting in multisystemic inflammatory damage. It is reported that cardiovascular diseases (CVD) are responsible for 20%-30% of deaths in patients with SLE. Heart rate recovery after exercise is a function of vagal reactivation, and its impairment is an independent prognostic indicator for cardiovascular and all-cause mortality. The aim of our study was to evaluate the heart rate recovery index in patients with SLE.
METHODS: The study population included 48 patients with SLE (35 women, mean age 46.3 ± 12.8 yrs, mean disease duration 6.0 ± 2.3 yrs) and 44 healthy controls (30 women, mean age 45.7 ± 12.9 yrs). Basal electrocardiography, echocardiography, and treadmill exercise testing were performed on all patients and controls. The heart rate recovery index was defined as the reduction in the heart rate from the rate at peak exercise to the rate at the first minute (HRR(1)), second minute (HRR(2)), third minute (HRR(3)), and fifth minute (HRR(5)) after stopping exercise stress testing.
RESULTS: There were significant differences in HRR(1) and HRR(2) indices between patients with SLE and the control group (24.1 ± 6.5 vs 33.3 ± 9.3; p < 0.001, and 44.6 ± 13.3 vs 53.7 ± 9.9; p < 0.001, respectively). Similarly, HRR(3) and HRR(5) indices of the recovery period were lower in patients with SLE, compared with indices in the control group (57.6 ± 13.0 vs 64.9 ± 11.7; p = 0.006, and 67.2 ± 12.3 vs 75.0 ± 15.4; p = 0.009, respectively). Effort capacity was markedly lower (9.0 ± 1.9 vs 11.1 ± 2.3 metabolic equivalents; p = 0.001, respectively) among the patients with SLE.
CONCLUSION: The heart rate recovery index is deteriorated in patients with SLE. When the prognostic significance of the heart rate recovery index is considered, these results may contribute to explain the increased occurrence of cardiac death. It points to the importance of the heart rate recovery index in the identification of high-risk patients.
Authors:
Orhan Dogdu; Mikail Yarlioglues; Mehmet Gungor Kaya; Idris Ardic; Nilufer Oguzhan; Mahmut Akpek; Omer Sahin; Lutfi Akyol; Saban Kelesoglu; Fatih Koc; Ibrahim Ozdogru; Abdurrahman Oguzhan
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Publication Detail:
Type:  Journal Article     Date:  2010-09-01
Journal Detail:
Title:  The Journal of rheumatology     Volume:  37     ISSN:  0315-162X     ISO Abbreviation:  J. Rheumatol.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7501984     Medline TA:  J Rheumatol     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  2511-5     Citation Subset:  IM    
Affiliation:
Erciyes University School of Medicine, Department of Cardiology, Kayseri, Turkey. orhandogdu@yahoo.com
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