Bacterial inflammation causes most heart attacks.
Consumption of carbohydrates raises blood glucose levels, thus boosting the bacterial count, and increasing the risk. Sugar is the enemy, regardless of what disease you are dealing with.
I have always thought of cholesterol as being an indicator of inflammation, like how WBC is a marker for infection, if you artificially lower the cholesterol the inflammation is sill present its just that there is less cholesterol to stick to the inflamed walls of the arteries