A diagnostic gauge for cardiac health is described. Multiple parameters pertaining to a patent's cardiac health are distilled to a single diagnostic vector having an angle and a magnitude. The diagnostic vector is plotted on a Cartesian graph to form a visual gauge that provides a general assessment of the patient's cardiac health given the underlying parameters. This allows care providers to diagnose more quickly a patient's cardiac health through observation of the gauge without having to review all of the measured parameters. Additionally, the diagnostic gauge can be used to screen for those patient's with conditions that require more immediate attention. A trend of the diagnostic vectors can also be developed and plotted to reveal changes in the patient's cardiac health over time.