Cognitive Behavioral Therapy and Light Therapy

Cognitive behavioral therapy (CBT-I) is a common treatment for insomnia that does not use medications. While CBT-I is effective for insomnia, it does not tend to improve the waking symptom of fatigue. Another treatment, Bright Light Therapy, is used for treating seasonal depression and sleep disorders, and may improve fatigue and physical activity in individuals with PAH. The purpose of this study to assess the effects of Bright Light Therapy compared to CBT-I to treat insomnia and fatigue in patients with PAH.

In a single site, 3-arm (Cognitive Behavioral Therapy \[CBT-I\] group; Bright Light Therapy group; Standard of Care group), parallel, randomized controlled trial we will enroll 36 subjects (n=12 per group) to assess the feasibility of Bright Light Therapy compared to CBT-I in subjects with pulmonary arterial hypertension (PAH) to treat insomnia (difficulty initiating sleep or maintaining sleep) and fatigue. * To assess the recruitment and retention rates of CBT-I and Bright Light Therapy. * To compare the effects of CBT-I and Bright Light Therapy to Standard of Care on (insomnia and fatigue severity) and secondary (wake after sleep onset and sleep onset latency) outcomes. * To test the effects of CBT-I and Bright Light Therapy to Standard of Care on the secondary outcome physical activity. * To test the effects of CBT-I and Bright Light Therapy to Standard of Care on the secondary outcomes: depression, dyspnea and QOL.