“…However, most studies on PTSD have focused on external events, such as combat, rape, and natural disaster, as precursors of the disorder. This is surprising, since 20 to 40% of patients with coronary artery disease (CAD) have difficulty with emotional adjustment, and suffer from depression, anxiety, and other emotional disturbances up to several years after the cardiac event (Ladwig, Kieser, KoÈ nig, Breithardt & Borggrefe, 1991;Magni et al, 1987;Duits, Boeke, Taams, Passchier & Erdman, 1997;Strauss et al, 1991). Secondly, these emotional disturbances are often found as comorbid diagnoses in individuals with PTSD (O'Brien, 1998).…”