How is alcohol exposure related to cardiomyopathy and heart failure?

• A. Chronic heavy alcohol use can cause dilated cardiomyopathy; abstinence improves outcomes
• B. Alcohol has no effect on heart health
• C. Moderate alcohol improves cardiac function
• D. Alcohol causes only arrhythmias but not DCM

Answer: (A)

Chronic heavy alcohol exposure directly damages the heart muscle, leading to dilated cardiomyopathy with enlarged ventricles and reduced pumping ability, which manifests as heart failure symptoms. Stopping alcohol can reverse or markedly improve this damage in many people, especially if identified before long-standing, irreversible changes occur; abstinence often leads to better ejection fraction and clinical outcomes. This makes the statement describing alcohol as a cause of dilated cardiomyopathy and noting that abstinence improves outcomes the best reflection of the relationship.

Alcohol does affect heart health, especially with heavy use, so saying there’s no effect is inaccurate. The idea that moderate drinking improves cardiac function isn’t a reliable or recommended concept in this context, and alcohol can cause more than just arrhythmias—it can contribute to dilated cardiomyopathy as well.