Heart disease is the No. 1 killer in the world.
It is the cause for roughly every one in four deaths, and because of this, doctors and researchers are struggling to discover early-warning symptoms and preventions.
One of the biggest problems for many suffering from heart disease is that they are not aware they have it. There are several examinations, the most common being stress tests, that can help determine how at risk a patient is for encountering a heart attack, but no such test is foolproof in diagnosing the heart condition and alerting patients of its severity.