Red flags The following findings are of particular concern: Falling asleep while driving or other potentially dangerous situations Repeated sleep attacks (falling asleep without warning) Breathing interruptions or awakening with gasping reported by bed partner Unstable cardiac or pulmonary status Recent stroke Status cataplecticus (continuous cataplexy attacks) History of violent behaviors or injury to self or others during asleep Frequent sleepwalking or other out-of-bed behavior Interpretation of findings Inadequate sleep hygiene and situational stressors are usually apparent in the history.