Observation until and all limited by all kinds of confounding factors. what we know for certain is that alcohol is a cardio toxin. it's actually poison to the heart muscle. large amounts of alcohol can cause cardiomyopathy, a weakness of the heart. binge drinking can cause arrhythmias like iatrial fibrillation. from a global health perspective we know that alcohol causes probably somewhere between 2 million and 3 million cases of cancer in the world every year in. head and neck cancer, stomach cancer. there's never within a, quote, safe dose of alcohol. when my patients ask me about how much, ...