There has been much scientific literature published in recent years on 'HRV Coherence', (e.g. the 0.1 Hz peak or vagal tone). We now understand that the central mechanisms of Coherence include baroreflex resonance and vagal afference. It is now known that HRV is diminished in PTSD, disrupting normal autonomic cardiac adjustments and impairing cognitive appraisal of environmental information. This webinar presents research data showing that HRV Biofeedback produces HRV Coherence and leads to improvement in emotional self-regulation and PTSD symptom reduction.