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Biofeedback cardiac coherence9/23/2023 ![]() Wait-listed controls subsequently reported similar improvements. In a pilot study, seven Vietnam-era war veterans with chronic treatment-refractory PTSD who trained with the infra-low frequency neurofeedback protocol reported significant reductions in symptom severity after twenty sessions (Kelson 2012). ![]() In a small 3 week open exploratory study a group of active-duty service members diagnosed with PTSD or depressed mood who received heart-rate variability biofeedback plus treatment as usual did not report greater reductions in symptom severity compared to a group receiving treatment as usual only (Lande 2010). The findings of a pilot study suggest that veterans diagnosed with combat-related PTSD who receive HRV biofeedback experience significant increases in HRV and reduced PTSD symptom severity compared to veterans receiving treatment as usual (Tan 2011). The researchers inferred that increased cardiac coherence may lessen the severity of cognitive symptoms that often accompany PTSD. In a small pilot study, all participants who received visual feedback in HRV patterns while undergoing relaxation training (Ginsberg 2010) had improved cardiac coherence (ie increased HRV) as well as improvements in attention and short-term memory. ![]() Abnormal low HRV is associated with deficits in attention and short-term memory in combat veterans diagnosed with PTSD. Cardiac coherence is an indicator of heart rate variability (HRV). ![]()
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