@stoneMason-- Yea, a racing heart after alcohol is very common. Every person has different tolerance levels. Some people are more sensitive to the effects of alcohol, but it really can happen o anyone who drinks.
What happens is that alcohol causes blood vessels to relax and enlarge. This means more blood flow to the heart, and a faster heart rate.
Heart patients or people who already have high blood pressure or arrhythmia are at greater risk. The whole idea that wine is good for the health is really not true. Alcohol doesn't have much benefit for the heart. The benefits from the antioxidants are not worth the risks from the its other effects on the organs.