Which statement about how the heart can enlarge is true?

Which statement about how the heart can enlarge is true?

• A. Through dehydration
• B. Through disease and through exercise
• C. Only through exercise
• D. It cannot get bigger

Answer: (B)

The heart enlarges through hypertrophy, an adaptive growth that happens when it faces a sustained increase in workload. When you train regularly, the heart can undergo physiologic hypertrophy: the chambers may enlarge and the walls thicken modestly to pump more blood efficiently during exercise. This form is generally healthy and reversible. Diseases that impose chronic extra work, like high blood pressure or valve problems, can cause pathologic hypertrophy—also enlarging the heart, but with potential long-term downsides if the load isn’t reduced. Dehydration isn’t a driver of true heart enlargement; it lowers blood volume and preload rather than causing lasting structural growth. So enlargement can occur due to disease or due to training, making that statement true.

The heart enlarges through hypertrophy, an adaptive growth that happens when it faces a sustained increase in workload. When you train regularly, the heart can undergo physiologic hypertrophy: the chambers may enlarge and the walls thicken modestly to pump more blood efficiently during exercise. This form is generally healthy and reversible. Diseases that impose chronic extra work, like high blood pressure or valve problems, can cause pathologic hypertrophy—also enlarging the heart, but with potential long-term downsides if the load isn’t reduced. Dehydration isn’t a driver of true heart enlargement; it lowers blood volume and preload rather than causing lasting structural growth. So enlargement can occur due to disease or due to training, making that statement true.