Which of the following is considered a life-threatening complication of procedural sedation?

• A. Nausea/Vomiting
• B. Headache
• C. Cardiopulmonary Arrest
• D. Dizziness

Answer: (C)

The essential point is that the most dangerous potential outcome of procedural sedation is a breakdown of airway and breathing that can progress to cardiopulmonary arrest. Nausea and vomiting, headaches, and dizziness are common and typically non-life-threatening side effects that resolve with time and care. In contrast, cardiopulmonary arrest means the heart and lungs stop functioning adequately, usually due to profound respiratory depression, airway obstruction, or severe hypotension during sedation. It demands immediate, aggressive life-support actions—secure the airway, start ventilation, and perform resuscitation as needed. This is why ongoing monitoring, readiness to manage the airway, and prompt intervention are emphasized in procedural sedation practice.