What are the chances having a heart attack at 27 help...

Heart attack: Only a small chance of an mi in one your age, get checked out.

Very low!: Congenital, anomalies can happen aortic root, aortic valvular disease aberrant coronary anomalous coronary origin but as another has noted: Cocaine and other drugs of abuse are more likely in your age group. If you are smoking, hypercholesterolemic, diabetic you have increased risk.

Chest pain: Low probability but possible, get checked.

Overall, low: However, this depends on your history: having high cholesterol, hypertension, diabetes, a family history of coronary artery disease, or using drugs like amphetamines or cocaine. Smoking also increases your risk. If you are having concerning symptoms, always see your doctor. Scores like the framingham risk score can help categorize your risk. These scores are all available online now.