Análisis de variabilidad del ritmo cardiaco y su relación con la sensibilidad insulínica en pacientes obesos y con sobrepeso / Heart rate variability and insulin resistance among obese males
Rev. méd. Chile
; 143(9): 1129-1135, set. 2015. graf, tab
Article
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| LILACS
| ID: lil-762683
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ABSTRACT
Background:
Heart rate variability analysis provides quantitative information about vagal and sympathetic modulation of cardiac function.Aim:
To analyze the relationship between heart rate variability and insulin resistance in obese patients. Material andMethods:
Male participants were studied, divided in 10 obese subjects aged 27 ± 2 years with a body mass index (BMI) of 31.2 ± 1.3 kg/m², 15 overweight subjects aged 24 ± 3 years with a BMI of 26.7 ± 1.5 kg/m² and 14 normal weight subjects aged 21 ± 2 years with a BMI of 22.5 ± 1.3 kg/m². Resting heart rate variability was measured in a period of 5 minutes. A spectral analysis was done measuring the low frequency/high frequency ratio (LF/HF). A non- linear analysis was carried out measuring the standard deviation of the instantaneous variation of RR intervals (SD1) and α-1 or a fractal analysis of RR interval complexity. A fasting blood sample was obtained to measure blood glucose and insulin and calculate the homeostasis model assessment for insulin resistance (HOMA-IR).Results:
Among obese subjects HOMA-IR, LF/HF, α-1 and SD1 values were 2.6 ± 2.1, 2.4 ± 1.8, 1.2 ± 0.06 and 22.5 ± 10 respectively. The figures for normal weight subjects were 0.5 ± 0.1, 1.3 ± 0.2, 0.9 ± 0.3 and 26 ± 7.8 respectively.Conclusions:
There is an association between spectral and fractal values of heart rate variability and HOMA-IR. These results may indicate a predominance of sympathetic control of heart rate among obese subjects.Palabras clave
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Índice:
LILACS
Asunto principal:
Resistencia a la Insulina
/
Frecuencia Cardíaca
/
Obesidad
Tipo de estudio:
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Límite:
Adult
/
Humans
/
Male
Idioma:
Es
Revista:
Rev. méd. Chile
Asunto de la revista:
MEDICINA
Año:
2015
Tipo del documento:
Article