What percent of small plaques in coronary vessels that do not obstruct, but break open and cause blood clots that result in heart attacks actually come from chronic viral infection?

This is fully 100% of cases, that small plaques in the coronary vessels which lead to obstruction from further complications, short of blocking the vessel wholesale, are due to viral perturbations causing a tissue growth and blockage or a blood clot to form and cause an obstruction of blood flow.