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Reduction of heart rate variability in hypertensive elderly
Paulo Evaristo de Andrade1, Joice Anaize Tonon do Amaral1,2, Laércio da Silva Paiva1,3
1a Laboratório de Delineamento de Estudos e Escrita Científica , Faculdade de Medicina do ABC , Santo André , SP , Brasil.
Blood Pressure
|July 26, 2017
Summary
Elderly individuals with high blood pressure show reduced heart rate variability (HRV) and parasympathetic nervous system activity compared to healthy seniors. This study highlights significant differences in cardiac autonomic modulation between these groups.
Area of Science:
- Cardiology
- Gerontology
- Physiology
Background:
- Global aging population necessitates research into age-related health conditions like hypertension.
- Heart Rate Variability (HRV) is a key indicator of cardiovascular function, assessing autonomic nervous system activity.
- Limited research exists on HRV in elderly hypertensive patients compared to normotensive individuals.
Purpose of the Study:
- To compare cardiac autonomic modulation between healthy elderly individuals and those with hypertension.
- Investigate differences in HRV parameters indicative of autonomic function.
Main Methods:
- Study included 80 elderly participants: 40 healthy and 40 with hypertension (HBP).
- Collected anthropometric data, performed HRV analysis (time, frequency, and geometric domains), and administered the IPAQ questionnaire.
- Analyzed HRV parameters including pNN50, SDNN, RMSSD, LF, HF, RRtri, TINN, SD1, SD2, and the SD1/SD2 ratio.
Main Results:
- Hypertensive elderly showed increased MeanRR and a decreased SDNN compared to controls.
- Frequency domain analysis revealed a significant decrease in High Frequency (HF) power in hypertensive individuals.
- Geometric analysis indicated reduced TINN and SD2, with a significantly increased SD1/SD2 ratio in the hypertensive group.
Conclusions:
- Elderly patients with hypertension exhibit diminished heart rate variability.
- Hypertension in the elderly is associated with reduced parasympathetic nervous system modulation.
- HRV analysis provides valuable insights into autonomic dysfunction in hypertensive elderly individuals.
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