The coronary artery calcium (CAC) score test measures the calcium buildup in heart arteries through a CT scan, indicating potential heart disease risk. A zero score signifies very low risk, while 400 or higher indicates high risk of heart attacks or stroke. Recommended for those with unclear risk profiles, it offers insights into heart health without using contrast dye. The coronary artery calcium (CAC) score test measures the calcium buildup in heart arteries through a CT scan, indicating potential heart disease risk. A zero score signifies very low risk, while 400 or higher indicates high risk of heart attacks or stroke. Recommended for those with unclear risk profiles, it offers insights into heart health without using contrast dye. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle