What is the usual cause of death for a person with multiple sclerosis?

• A. Cardiac arrest
• B. Respiratory failure
• C. Liver failure
• D. Stroke

Answer: (B)

Respiratory failure is the usual cause of death in multiple sclerosis because the disease often leads to progressive weakness of the muscles needed for breathing and an impaired ability to clear secretions. As MS advances, weakness of the diaphragm, intercostal muscles, and chest wall reduces lung capacity and the effectiveness of coughing. This makes individuals more susceptible to respiratory infections, such as pneumonia, and once a respiratory infection takes hold or respiratory function declines, it can lead to respiratory failure.

Understanding the pattern helps: MS is a CNS disease that disrupts nerve signaling to muscles, including those involved in respiration and swallowing. Dysphagia and reduced cough reflex further increase the risk of aspiration and infection, compounding the threat to breathing. While cardiac events, liver failure, or strokes can occur in the general population, they are not the typical or primary cause of death specifically associated with MS.

In clinical care, monitor respiratory status closely, assess for signs of declining lung function, and intervene early with measures to prevent infections, maintain airway clearance, and support ventilation as needed. Vaccinations and pulmonary rehabilitation can also help reduce risk.