Differentiation of left ventricular diastolic function by mid-diastolic mitral annular motion patterns

Area of Science:

• Cardiology
• Echocardiography
• Diastolic Function

Background:

• Mid-diastolic mitral annular motion may reflect myocardial strain energy from systole.
• Different patterns of this motion might correlate with varying left ventricular (LV) diastolic function.

Purpose of the Study:

• To compare LV diastolic properties across distinct mid-diastolic mitral annular motion patterns.
• To evaluate the diagnostic utility of specific motion patterns in assessing diastolic function.

Main Methods:

• Echocardiographic examination of 203 consecutive outpatients.
• Classification of subjects into three groups based on mid-diastolic mitral annular motion patterns (upward La wave, downward La wave without upward, no La wave).
• Definition of upward/downward La wave: apical/atrial motion, >=3 beats, peak velocity >=2 cm/s.

Main Results:

• Group 1 (upward La wave) showed higher early diastolic mitral annular velocity (Ea) and lower E/Ea ratio compared to groups 2 and 3 (p < 0.001).
• Upward La wave demonstrated 75-88% accuracy in predicting normal diastolic function.
• Patients with upward La wave exhibited improved LV diastolic function and reduced LV filling pressures.

Conclusions:

• Upward La wave is a valuable indicator of normal LV diastolic function.
• Analysis of mid-diastolic mitral annular motion can complement existing methods for assessing LV diastolic function.
• This motion pattern is associated with better overall diastolic performance.