What is one typical reversible cause of cardiac arrest associated with electrolyte imbalance?

• A. Aspiration
• B. Hyperkalemia
• C. Pneumothorax
• D. Hypertension

Answer: (B)

Hyperkalemia is a typical reversible cause of cardiac arrest that is directly linked to electrolyte imbalance. In the context of cardiac function, potassium plays a crucial role in the electrical activity of the heart. Elevated levels of potassium can disrupt the normal electrical conduction system, leading to potentially life-threatening arrhythmias such as ventricular fibrillation or asystole. Early recognition and treatment of hyperkalemia are vital, as addressing this electrolyte imbalance can restore normal cardiac rhythm and improve outcomes for the patient experiencing cardiac arrest.

While other options listed may be associated with cardiac issues or similar emergencies, they do not specifically pertain to electrolyte imbalances in the way hyperkalemia does. For instance, aspiration and pneumothorax relate to airway and lung complications, and hypertension is a chronic condition that affects the cardiovascular system but does not represent an immediate reversible cause in the context of electrolyte-related cardiac arrest.