Veterans with co-morbid posttraumatic stress disorder (PTSD) and substance use disorders (SUDs) are at substantial risk of developing hypertension and cardiovascular diseases that often lead to premature death, with some evidence that they may die over 10 years earlier than their counterparts. As such, determining ways to improve their health outcomes is vital. Heart Rate Variability Biofeedback (HRVB) may be one way to restore autonomic balance and teach veterans with PTSD / SUDs how to respond differently to their symptoms. Multiple studies have found that HRVB not only improves autonomic nervous system (ANS) regulation / flexibility among veterans with PTSD, but also reduces PTSD symptoms. Additionally, there is evidence that HRVB reduces cravings and SUD symptoms. Currently it is proposed that the improvement in the PTSD and SUD symptoms are due to a combination of improving ANS regulation and veterans utilizing the HRVB techniques as coping strategies for their symptoms. Yet, none of these studies examined how HRVB versus other active interventions differentially effected symptoms and physiological outcomes. It may be useful to examine HRVB to other active interventions . The current project proposes to alleviate this gap by examining the effects of HRVB to one a active control condition (i.e., Present Centered Psychotherapy; PCT) among 50-residential veterans engaging in PTSD residential programming. Veterans will be recruited from residential programs at the Coatesville VAMC and screened for probable PTSD and an active (i.e., past year) SUD. If eligible, they will attend a brief visit that will include being randomized, engaging in a diagnostic interview, a battery of questionnaires related to PTSD / SUDs, attached to physiology equipment, and then complete 3 tasks (i.e., baseline task, emotion induction, and HRVB or Self-Compassion Break). Upon task completion, all veterans will be screened for risk and begin one of the conditions. Similar research procedures will be conducted after their final session. This study would provide evidence for the real-world effectiveness of HRVB compared to a control condition among one of the highest risk populations treated at the VA, which may provide invaluable insight into active mind-body treatments for veterans with PTSD / SUD.
PTSD diagnosis
Enrolled in VA healthcare
Attending residential programming at CVAMC
Current substance use difficulty based on screening questions
Non-English speaking
Inability to complete study procedures
Lack competency to provide consent
Acute intoxication of a substance
Parallel
Trauma Informed Heart Rate Variability Biofeedback
Behavioralplease see description in the arm of the study for details.
Present Centered Therapy
Behavioralplease see description in the arm of the study for details.
Clinician Administered PTSD Scale for DSM-5 Revised
The CAPS-5-R is the newest version of the CAPS-5, which is a structured diagnostic interview for PTSD based on the PTSD criteria in the DSM-5. All 20 symptoms of PTSD are assessed in relation to a patient's index event, which is then rated on a zero to ten severity scale with qualitative and quantitative indicators for each level of severity. Throughout the assessment symptoms that are less trauma specific include a prompt to determine if the symptom is related to the index event. The CAPS-5-R will be the studies primary outcome variable for PTSD symptom severity.
Heart Rate (HR)
Heart Rate will be utilized as the study's primary measure of overall autonomic arousal.
Respiratory Sinus Arrythmia
To determine parasympathetic activity, the R-spike to R-spike interval will go through a Fourier transformation and the amount of power that occurs in the high frequency range (0.15-0.04 Hz) will be used as our measure of vagal mediated parasympathetic activity, also known as RSA.
Skin Conductance Level
Resting Skin Conductance Level may be used as proxy of sympathetic activity at rest, which is collected through a skin conductance monitor on the participants palm / fingers.
PTSD Symptom Checklist for the DSM-5 (PCL-5)
The PCL-5 is 20-item self-report questionnaire that assesses each symptom of PTSD on a 5-point Likert Scale. The PCL-5 will be used to assess for PTSD symptom severity
Root Mean Square of Successive Differences (Rmssd)
Rmssd is a time-domain measure of vagal mediated parasympathetic activity that is determined by calculating the root mean square of successive differences within a heart beat to heart beat interval (R to R interval). It is commonly used as a proxy for parasmypathetic activity or regulation.
Standard Deviation between Normal to Nrmal intervals (SDNN).
SDNN is a time domain HRV measure that acts as a proxy for overall autonomic nervous system activity and health, with greater levels usually indicative of greater health.
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