Analysis of heart rate variability with electromyography in heart transplant recipients.
Arch Phys Med Rehabil
; 90(9): 1635-8, 2009 Sep.
Article
em En
| MEDLINE
| ID: mdl-19735794
ABSTRACT
OBJECTIVE:
To investigate vagal parasympathetic functions by electromyographic R-R interval variation analyses in heart transplant recipients.DESIGN:
Cross-sectional and longitudinal study.SETTING:
Department of physical medicine and rehabilitation, university hospital.PARTICIPANTS:
Early (n=8; <3 mo) and late (n=17; >1 y) heart transplant recipients and healthy volunteers (n=20) were included.INTERVENTIONS:
Not applicable. MAIN OUTCOMEMEASURES:
The R-R interval variations at rest and in response to deep breathing, Valsalva, and tilt/standup maneuvers were analyzed in all patient and control groups. Further, 8 early heart transplant recipients were followed up at the sixth and twelfth months after transplantation.RESULTS:
Compared with controls, both early and late transplant recipients had significantly lower R-R interval variation ratios (P<.05). There were no statistically significant differences between the early and late groups (P>.05). R-R interval variation ratios showed no significant changes from baseline (P>.025) in the early heart transplant recipients.CONCLUSIONS:
The findings of the study suggest that parasympathetic activities are suppressed in the early stage after heart transplantation and do not significantly recover with time. The electromyographic analysis of R-R interval variation is a simple test that may offer an attractive alternative for routine evaluation of autonomic dysfunction in heart transplant recipients.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Transplante de Coração
/
Frequência Cardíaca
Tipo de estudo:
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Limite:
Adolescent
/
Adult
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article