Which of the following is a common sign of respiratory distress?

Increased heart rate is a common sign of respiratory distress because the body is attempting to compensate for a lack of oxygen or an inability to effectively exchange gases in the lungs. When someone is experiencing respiratory distress, their oxygen levels may drop, leading the heart to pump faster in an effort to deliver more oxygen to vital organs and tissues. This tachycardia is part of the body's fight or flight response, indicating that it's struggling to maintain adequate oxygenation.

In contrast, deep, slow breathing is typically associated with more relaxed states or conditions where the body is not in distress and is less likely to occur during respiratory distress scenarios. Sudden unconsciousness might indicate severe compromises, such as respiratory failure or other critical conditions, but it is not a sign that can be monitored continuously or seen at earlier stages of distress. Flushed skin might suggest other issues such as fever or allergic reactions, but it is not specific to respiratory distress like increased heart rate is.

Recognizing increased heart rate as a key sign allows paramedics and healthcare providers to assess a patient’s respiratory status and intervene appropriately as needed to improve their condition.