Management of Grade I Diastolic Dysfunction with Normal E/E' Ratio

Diagnostic Criteria

Grade I diastolic dysfunction is characterized by an E/A ratio ≤0.8 along with a peak E velocity of ≤50 cm/sec, indicating impaired relaxation with normal or low left atrial pressure, according to the European Heart Journal 1, 2
Normal E/E' ratio (typically <8) confirms normal left ventricular filling pressures, despite the presence of abnormal relaxation, as stated by the European Heart Journal 3
Diagnostic confirmation of Grade I diastolic dysfunction requires an E/A ratio ≤0.8 with peak E velocity ≤50 cm/sec, a normal E/E' ratio (<14, typically <8), and a normal left atrial volume index (<34 mL/m²), as per the European Heart Journal 2, 4
A normal tricuspid regurgitation velocity (<2.8 m/sec) is also a diagnostic criterion for Grade I diastolic dysfunction, according to the European Heart Journal 5

The European Society of Cardiology recommends addressing primary etiologies such as hypertension, coronary artery disease, and other contributing factors (obesity, diabetes, etc.) to manage Grade I diastolic dysfunction, as stated in the European Heart Journal 6
Beta-blockers are recommended to lower heart rate and increase diastolic filling period, particularly in patients with concomitant coronary artery disease or hypertension, according to the European Heart Journal 6
ACE inhibitors or ARBs are used to control blood pressure and may directly improve ventricular relaxation and promote regression of hypertrophy, as stated in the European Heart Journal 6

Regular echocardiographic assessment is necessary to monitor for progression to more advanced grades of diastolic dysfunction, as recommended by the European Society of Cardiology 6
Consider diastolic stress testing if symptoms develop despite normal resting parameters, according to the European Heart Journal 6