Key result
After 35 years of beta-blockade treatment, autonomic modulation of cardiac function remained within normal limits for age, with blood pressure controlled at 120-150/60-80 mmHg.
Why the study?
Does 35 years of beta-adrenergic blockade therapy affect autonomic cardiovascular modulation in a hypertensive patient compared to a normal population?
Case Report (n=1)
Does 35 years of beta-adrenergic blockade therapy affect autonomic cardiovascular modulation in a hypertensive patient compared to a normal population?
A case study suggests that 35 years of beta-blocker therapy for hypertension preserves normal autonomic cardiovascular modulation for age.
Answers are grounded in this paper and cite their sources.
Single-case HRV findings in elderly hypertension should not change practice; leaves open long-term beta-blockade effects on autonomic control.
The influence of long duration beta-blockade on autonomic and cardiovascular function remains not completely understood. The aim of this study was to evaluate the effect of long duration beta-adrenergic blockade treatment for hypertension control, on autonomic cardiovascular control in a 78-year-old male patient in relation to population findings. Heart rate variability was determined in the frequency domain (Total power, low frequency power and high frequency power), during baseline (supine and standing) and during 24 hour Holter recording. Results were compared with heart rate and heart rate variability data obtained from a normal healthy male population as a function of age. Circadian rhythm remained present. Heart rate during daytime was lower compared to the population group. None of the heart rate variability parameters were different from the normal population age group. Our results show that after 35 years of beta-blockade treatment, autonomic modulation of cardiac function remains within normal limits for that age group. Blood pressure remained at the higher limits (120-150/60-80 mmHg), but under control.
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Aubert et al. (2009) conducted a case report in Hypertension (n=1). Beta-adrenergic blockade therapy vs. Normal healthy male population was evaluated on Heart rate variability in the frequency domain. After 35 years of beta-blockade treatment, autonomic modulation of cardiac function remained within normal limits for age, with blood pressure controlled at 120-150/60-80 mmHg.
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