Which term is characterized by weakening of the heart muscle, often leading to reduced pumping efficiency?

• A. Cardiomegaly
• B. Aneurysm
• C. Cardiomyopathy
• D. BBB

Answer: (C)

Cardiomyopathy is a disease of the heart muscle itself, where the muscle becomes weakened and does not contract as effectively. This reduced contractile strength lowers the heart’s pumping efficiency, often leading to a drop in ejection fraction and symptoms of heart failure such as fatigue and shortness of breath.

Other terms describe different things: cardiomegaly means the heart is enlarged, which can occur alongside cardiomyopathy but isn’t specifically about weakness of the muscle. An aneurysm is a localized bulge in a vessel or heart wall, a structural dilation rather than a problem with muscle strength. BBB, or a bundle branch block, is a conduction issue affecting the timing of electrical impulses, not the intrinsic pumping strength of the muscle.