Education Evaluating how well the heart is doing and what changes have occurred can help doctors and people make informed decisions about heart health. To do that, a recent study examined a way to calculate the functional age of people’s hearts compared to their biological age. The study used a model based on cardiac magnetic resonance imaging (MRI), and found that certain health conditions, such as obesit y and AFib, and leading an unhealthy lifestyle, can increase the functional age of the