Which histopathologic finding is associated with diastolic dysfunction?

Which histopathologic finding is associated with diastolic dysfunction?

• A. Cardiomyocyte hypertrophy, inflammation, & fibrosis
• B. Thinner, elongated cardiomyocytes and fibrosis
• C. Myocardial necrosis with edema
• D. Cardiac myocyte atrophy and apoptosis

Answer: (A)

Diastolic dysfunction is driven by a stiff, noncompliant ventricle that fills poorly during diastole. This stiffness comes from remodeling that includes cardiomyocyte hypertrophy and increased interstitial fibrosis, often with some inflammatory changes as the heart adapts to chronic pressure overload. So the histopathologic finding of cardiomyocyte hypertrophy, inflammation, and fibrosis best fits diastolic dysfunction, reflecting concentric remodeling and stiffening of the ventricle. The other patterns don’t align with this mechanism. Thinner, elongated cardiomyocytes with fibrosis suggest thinning and dilation rather than the thickened, stiff ventricle seen in diastolic dysfunction. Myocardial necrosis with edema points to an acute injury like infarction, not the chronic remodeling characteristic of diastolic dysfunction. Cardiac myocyte atrophy and apoptosis describe loss of cells, which isn’t the typical remodeling pattern underlying diastolic dysfunction.

Diastolic dysfunction is driven by a stiff, noncompliant ventricle that fills poorly during diastole. This stiffness comes from remodeling that includes cardiomyocyte hypertrophy and increased interstitial fibrosis, often with some inflammatory changes as the heart adapts to chronic pressure overload. So the histopathologic finding of cardiomyocyte hypertrophy, inflammation, and fibrosis best fits diastolic dysfunction, reflecting concentric remodeling and stiffening of the ventricle.

The other patterns don’t align with this mechanism. Thinner, elongated cardiomyocytes with fibrosis suggest thinning and dilation rather than the thickened, stiff ventricle seen in diastolic dysfunction. Myocardial necrosis with edema points to an acute injury like infarction, not the chronic remodeling characteristic of diastolic dysfunction. Cardiac myocyte atrophy and apoptosis describe loss of cells, which isn’t the typical remodeling pattern underlying diastolic dysfunction.