Poincare Plot of Heart Rate Variability An Approach Towards Explaining the Cardiovascular Autonomic Function in Obesity.
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Date
2013-01
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Abstract
Obesity has been shown to affect cardiovascular function. Heart
rate variability (HRV) has been an accepted method of measuring
cardiovascular autonomic function. The aim of the study is to evaluate the
impact of obesity on HRV using Poincaré plot (POP) analysis. A finding of
sympathovagal imbalance in pre-obese adults in respiratory sinus
arrhythmia (RSA) could provide important diagnostic information about
early subclinical autonomic dysfunction in obesity. Thirty one obese (BMI
26.84±2.47) adult males (25.42±7.86 years) were compared with 31 normal
subjects (25.38±4.61 years). In all participants, anthropometric and blood
pressure (BP) measurements were performed. After rest at supine position
for 5 minutes, they were asked to do control deep breathing for 1 minute.
HRV was measured in terms of POP analysis. Differences in Resting heart
rate (RHR) (P≤0.025), Pulse pressure (PP) (P≤0.048), SD1 (P≤0.042) and
SD2 (P≤0.039) of the POP between the two groups were significant.
Correlation between Body mass index (BMI) and (PP) (p=0.19); SD1 (p=0.47)
and SD2 (p=0.39) of the POP were significant in obese groups. Obesity is
related to sympathovagal imbalance characterized by depressed
parasympathetic tone and increased sympathetic activity. Nonlinear methods
like POP permit simple assessment of autonomic function, despite measuring
different aspects of HRV.
Description
Keywords
poincaré plot, obesity, heart rate variability
Citation
Muralikrishnan Krishnan, Balasubramanian Kabali, Ali Sajjadh M Jawahar, Rao Badanidiyur Vishwanatha. Poincare Plot of Heart Rate Variability An Approach Towards Explaining the Cardiovascular Autonomic Function in Obesity. Indian Journal of Physiology and Pharmacology. 2013 Jan-Mar; 57(1): 31-37.