I have many health issues 3 brain aneurysms, an asd, history of cardiomyopathy, i know it's bad but how bad to occasionally have some beer?

Risky: You have cardiomyopathy which is not helped with alcohol. You are at risk for arrhythmia such as atrial fibrillation and this would be more likely with beer. Therefore, i would avoid alcohol.

Heart disease: With the health issues you have i would stay away from alcohol. You have enough problems without adding additional potential problems.