What are the most common causes of cardiomyopathy?

What are the most common causes of cardiomyopathy?

• A. MI, infection
• B. Alcohol Use
• C. Genetic Mutations
• D. Viral Myocarditis

Answer: (A)

The idea being tested is what most commonly causes cardiomyopathy, especially the dilated form that underlies many cases of heart failure. Ischemic injury from a prior myocardial infarction damages heart muscle, leading to scar formation and remodeling that weakens contraction and causes the ventricle to dilate. Infections, particularly viral myocarditis, injure the myocardium through inflammation and cell damage, which can also progress to dilated cardiomyopathy over time. Together, ischemic damage and inflammatory/infectious injury account for a large share of cardiomyopathy cases seen in practice, making them the most frequent culprits. Other factors like heavy alcohol use or genetic mutations are important as well, but they are less common across the broader patient population.

The idea being tested is what most commonly causes cardiomyopathy, especially the dilated form that underlies many cases of heart failure. Ischemic injury from a prior myocardial infarction damages heart muscle, leading to scar formation and remodeling that weakens contraction and causes the ventricle to dilate. Infections, particularly viral myocarditis, injure the myocardium through inflammation and cell damage, which can also progress to dilated cardiomyopathy over time. Together, ischemic damage and inflammatory/infectious injury account for a large share of cardiomyopathy cases seen in practice, making them the most frequent culprits. Other factors like heavy alcohol use or genetic mutations are important as well, but they are less common across the broader patient population.