angel66 has already given and beside this according to American Heart Association diastolic function can also be quantitated by echocardiography:
1.
Mild diastolic dysfunction or “impaired relaxation” (Grade 1)- Could also be subdivided with likely normal resting LV filling pressures (mild) and likely elevated left ventricular enddiastolic pressure (LVEDP) — mild to moderate; and
- Usually no symptoms at rest with mild exercise limitation.
2.
Moderate diastolic dysfunction or “pseudonormal” (Grade 2)- Associated with elevated LVEDP; and
- Associated with exertional dyspnea and moderate functional impairment.
3.
Severe diastolic dysfunction or “restrictive physiology” (Grade 3)- Associated with high LV filling pressures (LVEDP);
- Dyspnea with minimal exertion and marked functional impairment; and
- May be further classified as Grade 4, if the mitral Doppler inflow is not reversed with Valsalva’s maneuver.
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