Heart rate variability biofeedback in patients with alcohol dependence: a randomized controlled study

Area of Science:

• Neuroscience
• Cardiology
• Psychiatry

Background:

• Alcohol dependence causes autonomic imbalance, affecting vasomotor and cardiac nerves, leading to dysfunction and reduced heart rate variability (HRV).
• Autonomic imbalance is associated with heightened craving and increased cardiovascular mortality in individuals with alcohol dependence.
• Reduced HRV is a key indicator of autonomic dysfunction in alcohol dependence.

Purpose of the Study:

• To evaluate the impact of heart rate variability (HRV) biofeedback training on HRV, vasomotor function, craving, and anxiety.
• To assess the efficacy of HRV biofeedback as an adjunct to standard inpatient rehabilitation for alcohol dependence.

Main Methods:

• A randomized controlled trial involving 48 patients undergoing inpatient alcohol rehabilitation.
• The intervention group (n=24) received six sessions of HRV biofeedback over two weeks alongside standard care.
• Standard care was provided to the control group (n=24). Craving, anxiety, HRV (CVNN), and vasomotor function were assessed at baseline, post-intervention, and at 3 and 6-week follow-ups.

Main Results:

• HRV biofeedback significantly reduced craving (Obsessive Compulsive Drinking Scale scores) immediately post-intervention compared to baseline.
• Anxiety levels were significantly reduced at 3 and 6-week follow-ups in the biofeedback group.
• Vasomotor function showed significant improvement immediately after biofeedback intervention, while HRV (CVNN) showed a non-significant trend towards increase.

Conclusions:

• HRV biofeedback demonstrates potential as a complementary therapy for alcohol dependence during inpatient rehabilitation.
• The findings suggest that HRV biofeedback can effectively decrease anxiety and improve vasomotor function.
• Further research may explore the sustained effects of HRV biofeedback on increasing HRV and reducing craving in this population.