Welcome to HCM,
You are young and developed coronary artery
disease for which angioplasty
and a stent is there, Please take care of all risk factors.
It is absolutely necessary to quit smoking
As far as alcohol is concerned as you have undergone a angioplasty advise is to quit alcohol also as there are some controversy regarding advise.
amount and the duration of alcohol consumption are critical in the development of disease. Contrary to general opinion, the type of alcoholic beverage is not important. Thus, one drink (1 ounce, 30 ml) of liquor (whisky, gin, vodka) contains the same amount of ethanol
(13 grams) as one glass of wine (4 oz, 120 ml) or a can of beer (12 oz, 360 ml).
As something called automatism in it's intake increases amount of alcohol and causes many health problems.
Take care of diet and keep near ideal weight.
Take regular preventive medicines.
Take care of your cholesterol