Practical classification of diastolic function
| Diastology when ejection fraction is (near) normal (>45–50%) |
| 1. Normal diastolic function. |
| 2. Mild diastolic dysfunction with normal resting filling pressures (impaired relaxation) |
| 3. Moderate diastolic dysfunction with elevated filling pressures (pseudonormal filling) |
| 4. Severe diastolic dysfunction with notably elevated filling pressures (restrictive filling—reversible or non-reversible) |
| 5. Indeterminate diastolic function (paced rhythm, atrial fibrillation, mitral valve disease) |
| Diastology when ejection fraction is reduced (<45%) |
| 1. Diastolic dysfunction with normal filling pressures (impaired relaxation pattern) |
| 2. Diastolic dysfunction with elevated filling pressures (pseudonormal filling pattern) |
| 3. Diastolic dysfunction with severely elevated filling pressures (restrictive filling—reversible or non-reversible) |
| 4. Diastolic dysfunction with indeterminate filling pressures |