What is the best predictor of a heart attack? Written by Dr Harold Gunatillake-health writer There are many health nuts, who seems to eliminate risk factors to prevent a heart event, by eating the right foods (low carbs, low saturated and low trans-fat containing foods, low salt, etc.), exercising daily, keeping their weights within BMI calculations, controlling their lipid levels in the blood (LDL cholesterol), checking blood pressures to maintain within normal range and so on. But can we predict in such healthy absolute situations you could avoid a cardiac event? A good example is the death of former Australian Ironman Dean Mercer who suddenly died of a cardiac arrest at such young age of 47. ...