A severe contrast media reaction may include which of the following symptoms?

Severe contrast media reactions can manifest in various critical symptoms, among which life-threatening cardiac arrhythmias are particularly concerning. These arrhythmias can occur due to several factors, including the physiological effects of the contrast agent on the heart's electrical conduction system, potential allergic reactions, or changes in blood osmolarity. This makes monitoring the cardiac status essential during and after the administration of contrast media.

While mild nausea, fatigue, and a temporary skin rash are symptoms associated with more moderate or mild reactions to contrast media, they do not reflect the severity of the adverse effects. Such mild reactions are generally not life-threatening, which is why they are less relevant when considering severe reactions. Understanding the range of potential reactions is crucial for healthcare providers to ensure proper monitoring and intervention in cases of severe adverse events.