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Comparison of heart rate variability in normotensive and hypertensive Indian adults

Hasmukh Shah1, Srushti Patel1, Tejas Prajapati2

  • 1Department of Physiology, Pramukhswami Medical College, Bhaikaka University, Karamsad, Gujarat, India.

Indian Heart Journal
|March 26, 2023
PubMed

Insights

Hypertension is linked to autonomic imbalance. This study found significantly reduced heart rate variability (HRV) in hypertensive Indian adults compared to normotensive individuals, indicating impaired autonomic function.

Area of Science:

  • Cardiology
  • Autonomic Nervous System Research
  • Hypertension Studies

Background:

  • Autonomic dysfunction is a known factor in hypertension.
  • Heart rate variability (HRV) reflects autonomic nervous system activity.
  • Previous research suggests altered HRV in hypertensive populations.

Purpose of the Study:

  • To compare heart rate variability (HRV) between normotensive and hypertensive Indian adults.
  • To investigate the association between hypertension and autonomic imbalance using HRV analysis.
  • To quantify differences in specific HRV parameters between the two groups.

Main Methods:

  • Electrocardiogram (ECG) Lead II was recorded for 5 minutes.
  • Artifact-free, stationary recordings were selected for analysis.
  • Standard HRV time-domain measures were calculated and compared.

Main Results:

  • Hypertensive adults exhibited significantly lower total power (a measure of HRV) compared to normotensive adults.
  • The standard deviation of normal-to-normal RR intervals (SDNN) was significantly reduced in the hypertensive group.
  • Overall HRV was significantly diminished in hypertensive individuals.

Conclusions:

  • Hypertension in Indian adults is associated with reduced heart rate variability.
  • Autonomic imbalance, as indicated by decreased HRV, is prevalent in hypertensive individuals.
  • HRV analysis can serve as a potential non-invasive marker for autonomic dysfunction in hypertension.

Keywords:
Heart rate variabilityHypertension

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