What is the effect of heavy alcohol consumption on stroke risk?
Heavy alcohol consumption is a risk factor for all types of stroke. Most studies suggest a J-shaped association between alcohol consumption and the risk of total and ischemic stroke, with a protective effect in light (<151 g/wk) or moderate (151 to 300 g/wk) drinkers and an elevated risk with heavy (>300 g/wk) alcohol consumption. In contrast, a linear association exists between alcohol consumption and the risk of ICH (intracranial hemorrhage). Heavy alcohol intake is associated with ICH at a young age, and can also result in hypertension, hypercoagulability, reduced cerebral blood flow, and an increased risk of AF (atrial fibrillation). 