S oon after isolated or mass traumatic events, victims often develop acute stress (AS) syndrome. While most victims recover over weeks or months, symptomatic suffering in the acute phase may be considerable, and the potential risks for chronic posttraumatic stress disorder (PTSD) pose a problem for the victims, their families, and their therapists. Applying a single session of abridged, modifi ed EMDR in the acute phase was anecdotally observed by the authors to alleviate most AS symptoms and dramatically abolish the intrusive symptoms of the acute phase. The current study reports the effects of applying a single session of modifi ed abridged EMDR to 86 accident and terrorist-bombing victims in the acute phase at a general hospital inpatient and outpatient setting.The dire psychological consequences of wars, terrorist attacks, and disasters, both natural and man-made, have made chronic PTSD a well-recognized diagnosis with richly documented psychotherapeutic interventions (Bradley, Greene, Russ, Dutra, & Westen, 2006). In contrast to the time-honed defi nition of chronic PTSD, the early phases of posttrauma are poorly defi ned, the information on the biology and psychology of acute stress syndromes is relatively sparse, and the effi cacy and role of early intervention for acute stress syndromes have not been suffi ciently delineated.Currently, psychiatric manuals identify three timerelated defi nitions of acute, posttraumatic stress:A single session of a modifi ed, abridged EMDR protocol was provided in a general hospital inpatient and outpatient setting to 86 patients with acute stress (AS) syndrome suffering from intrusion distress following accidents and terrorist bombing attacks. Fifty percent reported immediate fading of intrusive symptoms and general alleviation of distress, 27% described partial alleviation of their symptoms and distress, while 23% reported no improvement. Partial and nonresponders were provided with or referred for more comprehensive treatment. At 4-week and 6-month follow-up, the immediate responders in the terror victims group remained symptom free. The immediate responders tended to have uncomplicated AS symptoms with fewer risk factors for posttraumatic stress disorder (PTSD), while the nonresponders had higher exposure to former traumas and endorsed more risk factors for PTSD. These results support other anecdotal reports on the rapid effects of brief EMDR intervention on intrusive symptoms in early uncomplicated posttraumatic cases. Although more controlled studies are essential, this immediate method for symptomatic relief may be a potential addition for focused interventions in acute trauma victims.