Internet-Based Biofeedback-Assisted Relaxation Training in the Treatment of Hypertension: A Pilot Study

Effectiveness of biofeedback on blood pressure in patients with hypertension: systematic review and meta-analysis

Hypertension is the leading modifiable risk factor for cardiovascular disease, but less than 50% have their blood pressure controlled. A possible avenue to support hypertension management is a holistic approach, using non-pharmacological interventions. Since hypertension is mediated in part by dysregulation of the autonomic nervous system (ANS), biofeedback may help improve hypertension management by targeted self-regulation and self-awareness of parameters that regulate the ANS. This systematic review aimed to assess the effectiveness of biofeedback on blood pressure in hypertensive patients. The review was pre-registered on PROSPERO and followed the PICO strategy. A total of 1782 articles were retrieved, 20 met the inclusion criteria. Sample sizes ranged from 15 to 301 participants; with a median age of 49.3 (43.3-55.0) years and 45% were female. There was a significant effect of biofeedback on systolic (-4.52, Z = 2.31, P = 0.02, CI [-8.35, -0.69]) and diastolic blood pressure (-5.19, Z = 3.54, P = 0.0004, CI [-8.07, -2.32]). Six different biofeedback modalities were used, with biofeedback delivered by psychologists, trained therapists and research assistants. There was no publication bias, heterogeneity was rated as substantial and data quality was rated to be poor. This review demonstrated that biofeedback had a significant effect on blood pressure. However, this should be viewed in the context of included studies being limited by heterogeneity and dated literature, meaning the research does not reflect the current biofeedback technology such as wearable devices. Future research should incorporate these technologies with robust methodology to fully understand the effect of biofeedback on hypertension.

Biofeedback therapeutic effects on blood pressure levels in hypertensive individuals: A systematic review and meta-analysis

INTRODUCTION

Systemic arterial hypertension (SAH) is considered a multifactorial disease characterized by a persistent increase in blood pressure levels. Currently, the efficient control of blood pressure is achieved by both the use of pharmacological therapy and the control of risk factors. In addition, the use of biofeedback (BFB) as a non-pharmacological strategy represents a promising therapy.

OBJECTIVE

This study aims to evaluate the effects of BFB on systolic and diastolic blood pressure levels, as well as on environmental and psychosocial factors in patients with essential SAH.

METHODS

A systematic review (SR) of the literature was carried out in English and Portuguese using the following databases: SCIELO, LILACS, CINAHL, Cochrane, and PubMed. The search strategy included a mix of terms for the key concepts Biofeedback, Heart Rate Variability, Psychophysiological Feedback, and Heart Biofeedback. Studies were analyzed independently.

RESULTS

The included studies evaluated a total of 462 subjects of both sexes. The meta-analysis revealed that BFB significantly elicited greater blood pressure control, mainly improving DBP levels (Z = 2.15; P = 0.03).

DISCUSSION

Besides improvement in DBP readings post-intervention, BFB also resulted in better disease-related environmental and psychosocial factors, such as reduced stress levels. The magnitude of effect did not appear to depend on the type of BFB applied.

CONCLUSION

This SR demonstrated that BFB with visual and/or auditory information is a complementary option to pharmacological treatment in the management of individuals with systolic and diastolic arterial hypertension. Moreover, the use of this adjuvant therapy seems to facilitate better DPB control.

Building Resilience in an Urban Police Department

OBJECTIVE

The aim of this study is to examine a resilience training intervention that impacts autonomic responses to stress and improves cardiovascular risk, psychological, and physiological outcomes in police.

METHODS

Officers [(n = 38) 22 to 54 years] modified emotional and physical responses to stress using self-regulation. Measurements include psychological and physiological measures [eg, heart rate variability (HRV), blood pressure, C-reactive protein)] obtained at three time intervals.

RESULTS

Age was significantly (P < 0.05) associated with changes on several measures of psychological stress (eg, critical incident stress, emotional vitality, and depression). Associations were found between coherence and improved HbA1c (r = -0.66, P < 0.001) and stress due to organizational pressures (r = -0.44, P = 0.03). Improvements in sympathetic and parasympathetic contributors of HRV were significant (P < 0.03).

CONCLUSION

A stress-resilience intervention improves certain responses to job stress with greater benefits for younger participants.

Testing a Resilience Training Program in Police Recruits: A Pilot Study

Background:

Stress from multiple sources is inherent in law enforcement. However, it is possible to modify responses to stress with resilience training that includes teaching techniques to modify emotional and physical responses to stress, interface with mental health professionals, and practice sessions to improve self-regulation of responses to stress including coherence, a measure of heart rate variability. A gap exists in the research, however, regarding evaluation of the duration of effects after the initial resilience training.

Method:

Subjects included ( N = 34) recruits enrolled in summer 2015 at the Milwaukee Police Academy. An experimental design was used to compare recruits who received resilience training to recruits in the control group.

Results:

No statistically significant differences between the groups were found for self-reported measures of stress and resilience. For the treatment group ( n = 17), change in coherence was significant ( p < .001) and improvement in the Personal Organizational Quality Assessment Emotional Buoyancy subscale correlated significantly with the number of practice sessions ( r = .63, p = .01) and marginally with change in coherence ( r = .47, p = .07).

Conclusion:

Results confirm several significant effects of resilience training with recruits.

Internet-delivered treatment to promote health

PURPOSE OF REVIEW

The aim of this paper is to provide an updated review of recent controlled trials of Internet interventions for health conditions and how the Internet is used to promote health.

RECENT FINDINGS

We identified 18 published trials including studies on diabetes, cancer, pain conditions, obesity, irritable bowel syndrome, stress management, hypertension, metabolic syndrome, cerebral palsy, infertility, HIV infection, and fruit/vegetable consumption. Of the 18 trials, one-third targeted children and adolescents. Two cancer studies investigated the role of peer support in an online environment that failed to result in any major improvements. Overall, several trials did not result in any substantial significant improvements, but there are exceptions, such as treatment of irritable bowel syndrome, headache, and chronic pain. Although a few of the reviewed studies had sufficient sample sizes, the majority were small and underpowered. In particular, this was the case for the studies on children and adolescents.

SUMMARY

This review suggests that Internet interventions hold some promise as a complement to other treatments such as cognitive behavior therapy. The benefits from participating in online peer support groups are not clear. Although studies on children and adolescents have emerged, there is a lack of studies on older adults with health problems.