What is the significance of diuretics in treating restrictive cardiomyopathy?

• A. They treat the underlying disease
• B. They reduce cardiac output
• C. They address high filling pressures
• D. They improve muscle contractility

Answer: (C)

In restrictive cardiomyopathy, the heart's ability to fill with blood is impaired due to stiffness of the heart muscle, leading to increased filling pressures in the ventricles. Diuretics are significant in this context because they help reduce these high filling pressures by promoting the excretion of excess fluid from the body. This reduction in volume alleviates symptoms related to fluid overload, such as edema and pulmonary congestion, which can be prevalent in patients with restrictive cardiomyopathy.

By managing the high filling pressures effectively, diuretics can help improve patient comfort and functional status. They do not treat the underlying disease process or directly improve muscle contractility, which distinguishes their role in symptom relief from more targeted treatments aimed at the root cause of the condition.