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Low-frequency transcutaneous nerve stimulation in mild/moderate hypertension
1Rogaland Central Hospital, Stavanger, Norway.
Clinical Physiology (Oxford, England)
|March 1, 1991
Summary
Low-frequency transcutaneous electrical nerve stimulation (TNS) effectively lowers blood pressure in hypertensive patients. This non-invasive method shows promise for managing mild to moderate hypertension.
Area of Science:
- Cardiovascular Physiology
- Neurology
Background:
- Low-frequency peripheral nerve stimulation can cause vasodilation and lower blood pressure via sympatho-inhibition.
- Previous studies in animals and humans suggest a link between this stimulation, reduced vascular resistance, and decreased arterial pressure.
Purpose of the Study:
- To evaluate the effectiveness of low-frequency (2 Hz) transcutaneous electrical nerve stimulation (TNS) in patients with mild to moderate hypertension.
- To assess both short-term and long-term effects of TNS on blood pressure.
Main Methods:
- A double-blind, placebo-controlled study involving 46 hypertensive patients (diastolic pressure 90-115 mmHg).
- Objective blood pressure measurements using an automatic monitor.
- Comparison between a TNS group and a placebo group over short-term and 2-week daily stimulation periods.
Main Results:
- Short-term TNS significantly reduced systolic pressure by 8 mmHg (P<0.01), mean arterial pressure by 6 mmHg (P<0.01), and diastolic pressure by 4 mmHg (P<0.02).
- After 2 weeks of daily TNS, a similar blood pressure reduction was observed even without stimulation on the day of measurement.
Conclusions:
- Low-frequency TNS demonstrates a significant depressor effect in patients with uncomplicated mild/moderate hypertension.
- Further clinical research is warranted to explore the potential clinical application of TNS for managing hypertension.