If a heart scan shows dangerous plaque buildup, it’s likely that the plaque will keep growing over time in people who’ve had a heart attack or similar heart event—even if they’re managing other risk factors like cholesterol or blood pressure.

This study found that dangerous-looking plaque in the heart arteries is a strong sign that more plaque will grow over time — even when patients are taking heart-healthy omega-3 supplements. So yes, the dangerous plaque itself is a warning sign, regardless of treatment.